tcvn 6276_v_e

TCVN 6276 : 2003, Ph·n 1, Chõçng 1

qui ph−m cŸc hÎ thâng ng¯n ng÷a á nhiÍm biÌn cða t¡u Rules for Marine Pollution Prevention Systems of Ships

Ph·n 1 qui ½Ùnh chung

Chõçng 1 qui ½Ùnh chung

1.1 Qui ½Ùnh chung 1.1.1 Ph−m vi Ÿp dòng

1 Qui ph−m cŸc hÎ thâng ng¯n ng÷a á nhiÍm biÌn cða t¡u (sau ½µy ½õìc gài t°t l¡ "Qui ph−m") Ÿp dòng cho viÎc kiÌm tra, chÆ t−o kÆt c¶u v¡ thiÆt bÙ nh±m ng¯n ng÷a á nhiÍm cða cŸc t¡u biÌn mang c¶p cða ‡¯ng kiÌm ViÎt Nam (sau ½µy gài t°t l¡ ‡¯ng kiÌm).

HÎ thâng ng¯n ng÷a á nhiÍm biÌn nghØa l¡ kÆt c¶u, thiÆt bÙ qui ½Ùnh ê Ph·n 3,4,7 v¡ cŸc KÆ ho−ch öng cöu qui ½Ùnh ê Ph·n 5,6 Qui ph−m n¡y.

2 Trong trõéng hìp ½ć biÎt kháng thÌ Ÿp dòng yÅu c·u b¶t kü n¡o ½Ü cða Qui ph−m, thÖ phï thÞa m¬n nhùng yÅu c·u khŸc ½õìc ‡¯ng kiÌm cáng nhºn dúa trÅn cç sê Qui ph−m n¡y.

3 CŸc thiÆt bÙ khŸc cða t¡u dïng ½Ì ng¯n ng÷a á nhiÍm m¡ Qui ph−m n¡y kháng yÅu c·u l°p ½´t, phï thÞa m¬n nhùng yÅu c·u ½õìc ‡¯ng kiÌm cho l¡ c·n thiÆt.

4 CŸc yÅu c·u cÜ liÅn quan trong TCVN 6259:2003 Qui ph−m Phµn c¶p v¡ ½Üng t¡u biÌn vÞ th¾p ½õìc Ÿp dòng ½âi vèi vºt liÎu, trang thiÆt bÙ, l°p ½´t v¡ tay nghË thì thi cáng cŸc hÎ thâng ng¯n ng÷a á nhiÍm, tr÷ khi cÜ cŸc yÅu c·u khŸc ½õìc qui ½Ùnh trong Qui ph−m n¡y.

1.1.2 ‡iËu kho¨n tõçng ½õçng

‡¯ng kiÌm cÜ thÌ cho ph¾p l°p ½´t trÅn t¡u b¶t kü phò tïng, vºt liÎu, thiÆt bÙ hoć tä hìp thiÆt bÙ n¡o khi chîng Ït nh¶t cÜ hiÎu qu¨ ngang vèi nhùng ½iËu m¡ Qui ph−m n¡y yÅu c·u. Tuy nhiÅn, sú cho ph¾p n¡y kháng Ÿp dòng ½âi vèi viÎc dïng cŸc biÎn phŸp khai thŸc tŸc ½æng tèi viÎc kiÌm soŸt sú thï d·u ½Ì thay thÆ tõçng ½õçng cho cŸc ½ć tÏnh thiÆt kÆ v¡ chÆ t−o ½õìc Qui ph−m n¡y qui ½Ùnh.

1.1.3 CŸc qui ½Ùnh quâc gia

‡¯ng kiÌm cÜ thÌ thúc hiÎn cŸc qui ½Ùnh riÅng liÅn quan ½Æn v¶n ½Ë ng¯n ng÷a á nhiÍm do t¡u gµy ra theo ch× d¹n cða ChÏnh phð quâc gia m¡ t¡u mang cé hoć ChÏnh phð quâc gia cÜ chð quyËn m¡ t¡u ½ang khai thŸc t−i ½Ü.

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TCVN 6276 : 2003, Ph·n 2, Chõçng 1

Chõçng 2 thuºt ngù v¡ cŸc t÷ viÆt t°t

2.1 Qui ½Ùnh chung 2.1.1 Thuºt ngù

Nhùng thuºt ngù sø dòng trong Qui ph−m n¡y ½õìc ½Ùnh nghØa nhõ sau, tr÷ khi cÜ nhùng qui ½Ùnh khŸc trong t÷ng Ph·n cða Qui ph−m:

(1) "D·u" - D·u mÞ bao gãm d·u thá, d·u nhiÅn liÎu nńg, d·u bái trçn, d·u ½i-e-den, d·u løa, x¯ng v¡ cŸc lo−i d·u khŸc ½õìc ½Ùnh nghØa trong cŸc tiÅu chu¸n v¡ qui ½Ùnh cÜ liÅn quan.

(2) “Hån hìp d·u” - Hån hìp cÜ chöa h¡m lõìng d·u b¶t kü (tr÷ phò gia bái trçn).

(3) "Ch¶t lÞng" - Ch¶t b¶t kü cÜ Ÿp su¶t hçi (Ÿp su¶t tuyÎt ½âi) ê 37,80C kháng võìt quŸ 0,28 MPa.

(4) "Ch¶t lÞng ½æc h−i" - Ch¶t b¶t kü ½õìc xÆp v¡o ch¶t lo−i A, B, C hoć D nÅu ê B¨ng 4-1 Ph·n 4 Qui ph−m n¡y hoć cŸc ch¶t lÞng khŸc ½õìc t−m théi ½Ÿnh giŸ l¡ ch¶t ½æc ê möc ½æ tõçng öng vèi ch¶t lo−i A, B, C hoć D theo Qui ½Ùnh 3(4) Phò lòc II MARPOL 73/78.

(5) "D·u ½ât hoć d·u nhiÅn liÎu" - D·u b¶t kü ½õìc chê trÅn t¡u dïng l¡m nhiÅn liÎu cho mŸy chÏnh v¡ mŸy phò cða t¡u.

(6) "T¡u d·u" - T¡u ½õìc ½Üng ½Ì chê xá d·u ê ph·n lèn cða cŸc khoang h¡ng, v¡ t¡u ½õìc ½Üng ½Ì chê xá d·u trong mæt ph·n cða khoang h¡ng cÜ thÌ tÏch t÷ 200 m3 trê lÅn (tr÷ cŸc t¡u cÜ khoang h¡ng ½õìc l¡m thÏch hìp ½Ì d¡nh riÅng chê d·u kháng phï d·u chê xá).

(7) "T¡u chê xá ch¶t lÞng ½æc h−i" - T¡u ½õìc ½Üng ½Ì chê xá cŸc ch¶t lÞng ½æc h−i trong ph·n lèn cða cŸc khoang h¡ng, v¡ t¡u ½õìc ½Üng ½Ì chê xá ch¶t lÞng ½æc h−i trong mæt ph·n khoang h¡ng (tr÷ cŸc t¡u cÜ khoang h¡ng ½õìc l¡m thÏch hìp ½Ì d¡nh riÅng chê cŸc ch¶t lÞng ½æc h−i kháng phï l¡ ch¶t lÞng ½æc h−i chê xá).

(8) "T¡u chê h¡ng hån hìp" - T¡u ½õìc thiÆt kÆ ½Ì chê xá hoć d·u hoć cŸc h¡ng r°n kháng bao gÜi.

(9) "D±n cŸch ly" - Nõèc d±n ½õa v¡o mæt k¾t ½õìc bâ trÏ câ ½Ùnh ½Ì chöa nõèc d±n hoć ½Ì chöa cŸc h¡ng kháng phï l¡ d·u hoć ch¶t lÞng ½æc h−i nhõ ½¬ ½õìc ½Ùnh nghØa trong Qui ph−m n¡y, v¡ k¾t ½Ü ho¡n to¡n tŸch biÎt vèi hÎ thâng h¡ng.

(10) "ChiËu d¡i" (Lf) l¡ 96% täng chiËu d¡i trÅn ½õéng nõèc t−i 85% chiËu cao m−n thiÆt kÆ nhÞ nh¶t tÏnh t÷ m¾p trÅn cïng cða sâng ½Ÿy giùa, hoć l¡ chiËu d¡i t÷ m¾p trõèc sâng mñi ½Æn tµm tròc bŸnh lŸi trÅn cïng ½õéng nõèc n¡y, l¶y chiËu d¡i n¡o lèn hçn. ê cŸc t¡u ½õìc thiÆt kÆ cÜ ½æ chîi mñi, ½õéng nõèc ½Ì ½o chiËu d¡i phï song song vèi ½õéng nõèc thiÆt kÆ. ChiËu d¡i (Lf) tÏnh b±ng m¾t.

(11) "‡õéng vuáng gÜc mñi v¡ ½uái" phï ½õìc l¶y ê ½·u mñi v¡ ½uái cða chiËu d¡i (Lf). ‡õéng vuáng gÜc mñi ½i qua giao ½iÌm cða m¾p trõèc sâng mñi vèi m´t ph²ng ½õéng nõèc dïng ½o chiËu d¡i.

(12) "Giùa t¡u" nghØa l¡ ê giùa chiËu d¡i (Lf).

(13) "ChiËu ræng" (B) - ChiËu ræng lèn nh¶t cða t¡u ½o ê giùa t¡u tèi ½õéng bao thiÆt kÆ cða sõén ½âi vèi t¡u cÜ vÞ b±ng kim lo−i, v¡ tèi m¾p ngo¡i cða vÞ t¡u ½âi vèi t¡u cÜ vÞ bao b±ng cŸc vºt liÎu khŸc. ChiËu ræng (B) tÏnh b±ng m¾t.

(14) "Tràng tï to¡n ph·n" (DW) - HiÎu sâ giùa lõìng chiÆm nõèc cða t¡u trong nõèc cÜ tý tràng 1,025 t−i ½õéng nõèc chê h¡ng öng vèi m−n khá mïa h¿ v¡ tràng lõìng t¡u kháng, tÏnh b±ng t¶n.

(15) "Tràng lõìng t¡u kháng" - Lõìng chiÆm nõèc tÏnh b±ng t¶n cða t¡u kháng cÜ h¡ng, d·u ½ât, d·u nhén, nõèc d±n, nõèc ngàt v¡ nõèc c¶p trong cŸc k¾t, ½ã dú trù tiÅu dïng, h¡nh khŸch v¡ h¡nh lû cða hà.

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TCVN 6276 : 2003, Ph·n 1, Chõçng 2

(16) "HÎ sâ ngºp nõèc" cða buãng l¡ t× sâ giùa thÌ tÏch cÜ thÌ choŸn nõèc cða buãng v¡ täng thÌ tÏch cða buãng ½Ü.

(17) "D·u thá" - Hån hìp hy½rácŸcbon lÞng b¶t kü tãn t−i tú nhiÅn trÅn trŸi ½¶t, cÜ thÌ ½õìc xø lû hay kháng xø lû ½Ì phï hìp vèi sú vºn chuyÌn v¡ gãm cÜ : (a) D·u thá cÜ thÌ ½¬ ½õìc l¶y ½i mæt sâ th¡nh ph·n chõng c¶t. (b) D·u thá cÜ thÌ ½¬ ½õìc thÅm v¡o mæt sâ th¡nh ph·n chõng c¶t.

(18) "ThÌ tÏch" v¡ "DiÎn tÏch" trÅn t¡u ½õìc tÏnh theo tuyÆn hÖnh thiÆt kÆ.

(19) "T¡u chê d·u thá" - T¡u d·u ½õìc dïng ½Ì chê d·u thá.

(20) "T¡u chê d·u thõçng ph¸m" - T¡u d·u ½õìc dïng ½Ì chê d·u kháng phï l¡ d·u thá.

(21) "Trang thiÆt bÙ ng¯n ng÷a x¨ ch¶t lÞng ½æc h−i" - Bao gãm hÎ thâng røa, hÎ thâng t¸y cń, hÎ thâng x¨ dõèi nõèc, thiÆt bÙ ghi cða hÎ thâng x¨ cń v¡o phõçng tiÎn tiÆp nhºn, hÎ thâng nõèc l¡m lo¬ng, hÎ thâng hµm h¡ng, hÎ thâng l¡m s−ch b±ng tháng giÜ v¡ cŸc k¾t d±n cŸch ly.

(22) "T¡u ch−y tuyÆn quâc tÆ" - T¡u thúc hiÎn chuyÆn ½i t÷ mæt c¨ng cða nõèc n¡y ½Æn c¨ng cða nõèc khŸc.

(23) "Cń" - Ch¶t lÞng ½æc h−i b¶t kü cÝn l−i trong cŸc k¾t h¡ng v¡ trong ½õéng âng phòc vò sau khi l¡m h¡ng.

(24) " Ng¡y ½Æn h−n h¡ng n¯m" l¡ ng¡y tõçng öng vèi ng¡y hÆt h−n cða Gi¶y chöng nhºn quâc tÆ vË ng¯n ng÷a á nhiÍm d·u nhõng kháng tÏnh ng¡y hÆt h−n cða Gi¶y chöng nhºn n¡y.

(25) “ T¡u ½ang trong giai ½o−n ½Üng mèi” l¡ t¡u cÜ sâng chÏnh ½¬ ½õìc ½´t hoć l¡ t¡u ½ang trong giai ½o−n ½Üng tõçng tú. Thuºt ngù “ giai ½o−n ½Üng tõçng tú” nghØa l¡ giai ½o−n m¡ :

(a) ViÎc ½Üng mèi ½¬ cÜ thÌ nhºn biÆt ½õìc mæt con t¡u cò thÌ; hoć

(b) Cáng viÎc l°p rŸp con t¡u ½¬ ½õìc thúc hiÎn Ït nh¶t 50 t¶n hoć 1% khâi lõìng dú tÏnh cða to¡n bæ vºt liÎu kÆt c¶u, l¶y giŸ trÙ n¡o nhÞ hçn.

2.1.2 CŸc t÷ viÆt t°t

Trong Qui ph−m n¡y sø dòng cŸc t÷ viÆt t°t sau ½µy :

(1) MARPOL 73/78: Cáng õèc quâc tÆ vË ng¯n ng÷a á nhiÍm biÌn do t¡u gµy ra 1973, ½õìc bä sung b±ng NghÙ ½Ùnh thõ 1978 cÜ liÅn quan.

(2) MEPC: ™y ban bö vÎ mái trõéng biÌn.

(3) Gi¶y chöng nhºn IOPP : Gi¶y chöng nhºn quâc tÆ vË ng¯n ng÷a á nhiÍm d·u.

(4) CŸc Luºt cÜ liÅn quan : Cáng õèc quâc tÆ vË ng¯n ng÷a á nhiÍm do t¡u gµy ra 1973 v¡ cŸc Luºt ½õìc biÅn so−n dúa trÅn Cáng õèc.

(5) IMO : Tä chöc H¡ng hï quâc tÆ.

(6) SBT : K¾t d±n cŸch ly

(7) CBT : K¾t d±n s−ch

(8) COW : HÎ thâng røa b±ng d·u thá

(9) IGS : HÎ thâng khÏ trç

(10) PL : VÙ trÏ bö vÎ cða cŸc k¾t d±n cŸch ly

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TCVN 6276 : 2003, Ph·n 2, Chõçng 1

Ph·n 2 kiÌm tra

Chõçng 1 Qui ½Ùnh chung


CŸc qui ½Ùnh trong Chõçng n¡y Ÿp dòng cho viÎc kiÌm tra v¡ thø nghiÎm hÎ thâng ng¯n ng÷a á nhiÍm biÌn cða t¡u.

1.1.2 CŸc d−ng kiÌm tra

1 KÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm cða t¡u ½¬ hoć sÁ ½õìc l°p ½´t xuâng t¡u phï l¡ ½âi tõìng chÙu cŸc d−ng kiÌm tra sau ½µy :

(1) KiÌm tra l·n ½·u

(2) KiÌm tra chu kü

(3) KiÌm tra b¶t thõéng

2 KiÌm tra l·n ½·u bao gãm cŸc kiÌm tra sau ½µy :

(1) KiÌm tra l·n ½·u trong quŸ trÖnh chÆ t−o

(2) KiÌm tra l·n ½·u kháng cÜ sú giŸm sŸt trong quŸ trÖnh chÆ t−o

3 KiÌm tra chu kü bao gãm cŸc kiÌm tra sau ½µy :

(1) ‡âi vèi kÆt c¶u, thiÆt bÙ, v¡ cŸc KÆ ho−ch qui ½Ùnh ê Ph·n 3 ½Æn Ph·n 6 Qui ph−m:

(a) KiÌm tra h¡ng n¯m

(b) KiÌm tra trung gian

(c) KiÌm tra ½Ùnh kü

(2) ‡âi vèi thiÆt bÙ qui ½Ùnh ê Ph·n 7 Qui ph−m (a) KiÌm tra ½Ùnh kü

1.1.3 Théi h−n kiÌm tra

1 KiÌm tra l·n ½·u

(1) KiÌm tra l·n ½·u trong quŸ trÖnh chÆ t−o KÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm muân ½õìc chÆ t−o v¡ l°p ½´t xuâng t¡u phï chÙu sú kiÌm tra l·n

½·u trong quŸ trÖnh chÆ t−o cða ‡¯ng kiÌm phï hìp vèi thiÆt kÆ ½¬ ½õìc ‡¯ng kiÌm duyÎt. ‡¯ng kiÌm viÅn phï cÜ m´t ê cŸc giai ½o−n cáng viÎc dõèi ½µy. Tuy nhiÅn, cáng viÎc kiÌm tra cða ‡¯ng kiÌm viÅn cÜ thÌ ½õìc t¯ng lÅn hay gi¨m ½i tïy theo ½iËu kiÎn trang bÙ, trÖnh ½æ, tay nghË v¡ hÎ thâng kiÌm soŸt ch¶t lõìng ½õìc duyÎt cða nh¡ chÆ t−o hoć xõêng ½Üng t¡u. (a) Khi sø dòng vºt liÎu l¡m cŸc bæ phºn v¡ khi cŸc bæ phºn n¡y ½õìc l°p ½´t v¡o kÆt c¶u v¡ trang

thiÆt bÙ ng¯n ng÷a á nhiÍm. (b) Khi kÆt thîc gia cáng cŸc bæ phºn chÏnh v¡ t−i cŸc théi ½iÌm thÏch hìp trong quŸ trÖnh gia cáng,

nÆu c·n thiÆt. (c) Khi l°p ½´t cŸc trang thiÆt bÙ ng¯n ng÷a á nhiÍm quan tràng xuâng t¡u. (d) Khi tiÆn h¡nh thø ho−t ½æng.

(2) KiÌm tra l·n ½·u kháng cÜ sú giŸm sŸt trong quŸ trÖnh chÆ t−o

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TCVN 6276 : 2003, Ph·n 2, Chõçng 2

KÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm muân ½õìc chÆ t−o v¡ l°p ½´t xuâng t¡u theo cŸch khŸc vèi cŸch nÅu ê (1) trÅn phï chÙu sú kiÌm tra l·n ½·u kháng cÜ sú giŸm sŸt trong quŸ trÖnh chÆ t−o khi cÜ yÅu c·u kiÌm tra.

2 KiÌm tra h¡ng n¯m KiÌm tra h¡ng n¯m ½õìc thúc hiÎn trong kho¨ng théi gian ba thŸng trõèc hoć ba thŸng sau tÏnh t÷ ng¡y ¶n

½Ùnh kiÌm tra h¡ng n¯m cða ½ìt kiÌm tra l·n ½·u hoć kiÌm tra ½Ùnh kü trõèc ½Ü.

3 KiÌm tra trung gian KiÌm tra trung gian ½õìc tiÆn h¡nh trong ½ìt kiÌm tra h¡ng n¯m l·n thö hai hoć l·n thö ba sau khi ho¡n th¡nh ½ìt kiÌm tra l·n ½·u hoć kiÌm tra ½Ùnh kü. KiÌm tra h¡ng n¯m l·n n¡y ½õìc thay thÆ b±ng kiÌm tra trung gian.

4 KiÌm tra ½Ùnh kü

KiÌm tra ½Ùnh kü ½õìc tiÆn h¡nh 5 n¯m mæt l·n tÏnh t÷ ng¡y ho¡n th¡nh kiÌm tra l·n ½·u hoć kiÌm tra ½Ùnh kü l·n trõèc.

5 KiÌm tra b¶t thõéng KiÌm tra b¶t thõéng ½õìc tiÆn h¡nh trong cŸc trõéng hìp sau, v¡o théi ½iÌm kháng trïng vèi théi gian kiÌm

tra l·n ½·u, kiÌm tra h¡ng n¯m, kiÌm tra trung gian hoć kiÌm tra ½Ùnh kü : (1) Khi xÿ ra hõ hÞng cŸc bæ phºn quan tràng cða kÆt c¶u v¡ trang thiÆt bÙ chÙu sú kiÌm tra l·n ½·u, hoć

khi tiÆn h¡nh søa chùa hoć hoŸn cï cŸc bæ phºn bÙ hõ hÞng ½Ü. (2) Khi cÜ thay ½äi ½âi vèi KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u v¡/hoć KÆ ho−ch öng cöu á nhiÍm

biÌn do cŸc ch¶t lÞng ½æc h−i cða t¡u gµy ra m¡ t¡u ½¬ trang bÙ. (3) Khi kiÌm tra xŸc nhºn sú phï hìp vèi cŸc qui ½Ùnh cða Qui ph−m cho cŸc t¡u ½¬ ½Üng. (4) CŸc trõéng hìp khŸc khi th¶y c·n thiÆt.

1.1.4 KiÌm tra chu kü trõèc théi h−n

CŸc yÅu c·u ½Ì kiÌm tra chu kü trõèc théi h−n phï tho¨ m¬n nhùng qui ½Ùnh nÅu ê 1.1.4 cða TCVN 6259-1B:2003 Qui ph−m Phµn c¶p v¡ ½Üng t¡u biÌn vÞ th¾p.

1.1.5 Ho¬n kiÌm tra ½Ùnh kü

CŸc yÅu c·u ½Ì ho¬n kiÌm tra ½Ùnh kü phï tho¨ m¬n nhùng quy ½Ùnh nÅu ê 1.1.5(1) hoć 1.1.5(2) cða TCVN 6259-1B:2003 Qui ph−m Phµn c¶p v¡ ½Üng t¡u biÌn vÞ th¾p.

1.1.6 Søa ½äi cŸc yÅu c·u

1 Trong cŸc ½ìt kiÌm tra chu kü, ‡¯ng kiÌm viÅn cÜ thÌ søa ½äi cŸc yÅu c·u dúa trÅn cç sê kÏch thõèc, vïng ho−t ½æng, kÆt c¶u, tuäi t¡u, mòc ½Ïch sø dòng, kÆt qu¨ cða cŸc ½ìt kiÌm tra trõèc v¡ tr−ng thŸi thúc tÆ cða t¡u.

2 Trong l·n kiÌm tra trung gian, nÆu cŸc h−ng mòc kiÌm tra ½¬ ½õìc thúc hiÎn trong kho¨ng théi gian giùa l·n kiÌm tra h¡ng n¯m l·n thö 2 v¡ l·n thö 3 m¡ phï hìp vèi nhùng yÅu c·u cða l·n kiÌm tra trung gian, thÖ cŸc h−ng mòc n¡y cÜ thÌ ½õìc miÍn gi¨m theo û kiÆn cða ‡¯ng kiÌm viÅn.

3 Trong l·n kiÌm tra trung gian, nÆu ‡¯ng kiÌm viÅn x¾t th¶y c·n thiÆt hoć theo yÅu c·u cða chð t¡u, thÖ mæt sâ cŸc h−ng mòc kiÌm tra cÜ thÌ ½õìc thúc hiÎn phï hìp vèi nhùng yÅu c·u cða kiÌm tra ½Ùnh kü.

4 Trong l·n kiÌm tra ½Ùnh kü, nÆu cŸc h−ng mòc kiÌm tra ½¬ ½õìc thúc hiÎn trong théi gian giùa l·n kiÌm tra h¡ng n¯m l·n thö 4 v¡ kiÌm tra ½Ùnh kü quy ½Ùnh ê 1.1.3-4 phï hìp vèi yÅu c·u cða kiÌm tra ½Ùnh kü, thÖ cÜ thÌ ½õìc miÍm gi¨m theo û kiÆn cða ‡¯ng kiÌm viÅn. Tuy nhiÅn, trong trõéng hìp kiÌm tra h¡ng n¯m hoć kiÌm tra trung gian ½õìc thúc hiÎn trõèc théi h−n phï hìp vèi 1.1.4-2, TCVN 6259-1B:2003, thÖ kiÌm tra ½Ùnh kü phï ½õìc thúc hiÎn tho¨ m¬n cŸc yÅu c·u ½õìc quy ½Ùnh theo cŸch khŸc cða ‡¯ng kiÌm.

1.1.7 T¡u ng÷ng ho−t ½æng

1 T¡u ng÷ng ho−t ½æng kháng phï chÙu kiÌm tra chu kü quy ½Ùnh ê 1.1.2.

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2 Khi t¡u ng÷ng ho−t ½æng muân ½õa v¡o ho−t ½æng, thÖ phï tiÆn h¡nh kiÌm tra cŸc h−ng mòc cò thÌ m¡ trõèc ½µy ½¬ bÙ ho¬n l−i do t¡u ng÷ng ho−t ½æng (nÆu cÜ) v¡ cŸc kiÌm tra sau ½µy:

(1) NÆu mæt d−ng kiÌm tra chu kü n¡o ½Ü hoć kiÌm tra hÎ thâng mŸy theo chõçng trÖnh ½¬ ½õìc ¶n ½Ùnh trõèc khi t¡u ng÷ng ho−t ½æng m¡ chõa ½õìc thúc hiÎn, thÖ phï tiÆn h¡nh kiÌm tra chu kü d−ng ½Ü hoć kiÌm tra hÎ thâng mŸy ½¬ ½Ùnh.

(2) NÆu kiÌm tra chu kü hoć kiÌm tra hÎ thâng mŸy theo kÆ ho−ch ½¬ ¶n ½Ùnh trõèc khi t¡u ng÷ng ho−t ½æng ½¬ ½Æn h−n, thÖ vË nguyÅn t°c, v¹n phï ½õìc tiÆn h¡nh. Tuy nhiÅn, trong trõéng hìp n¡y thÖ ch× thúc hiÎn mæt trong cŸc d−ng kiÌm tra ½Ü m¡ thái.

3 NÆu viÎc kiÌm tra ½õìc thúc hiÎn theo cŸc yÅu c·u nÅu ê -2 trÅn l¡ kiÌm tra ½Ùnh kü, thÖ l·n kiÌm tra ½Ùnh kü n¡y phï phï hìp vèi tuäi cða t¡u.

1.2 Chu¸n bÙ kiÌm tra 1.2.1 Lõu û

Khi t¡u ½õìc kiÌm tra phï hìp vèi Qui ph−m, chð t¡u phï cÜ trŸch nhiÎm tháng bŸo cho ‡¯ng kiÌm viÅn ½Ùa ½iÌm kiÌm tra v¡ théi gian phï hìp trõèc khi cáng viÎc kiÌm tra ½õìc thúc hiÎn t−i théi ½iÌm thÏch hìp.

1.2.2 Chu¸n bÙ kiÌm tra

1 T¶t c¨ cŸc cáng viÎc chu¸n bÙ c·n thiÆt cho cáng viÎc kiÌm tra l·n ½·u, kiÌm tra chu kü hoć cŸc d−ng kiÌm tra khŸc quy ½Ùnh trong Ph·n n¡y phï do Chð t¡u hoć ngõéi ½−i diÎn hìp phŸp cða chð t¡u chÙu trŸch nhiÎm thúc hiÎn. Cáng viÎc chu¸n bÙ phï ½−t tèi ½æ an to¡n, dÍ d¡ng khi tiÆp cºn, v¡ cŸc ½iËu kiÎn c·n thiÆt ½Ì thúc hiÎn cáng viÎc kiÌm tra. CŸc thiÆt bÙ kiÌm tra, ½o lõéng, kiÌm ½Ùnh m¡ ‡¯ng kiÌm viÅn dúa v¡o ½Ü ½Ì ½Ÿnh giŸ phï cÜ chöng ch× v¡ ½õìc hiÎu ch×nh theo tiÅu chu¸n ½õìc ‡¯ng kiÌm ch¶p thuºn. Tuy nhiÅn, ‡¯ng kiÌm viÅn cÜ thÌ ch¶p nhºn nhùng dòng cò ½o lõéng ½çn gi¨n ( vÏ dò nhõ thõèc, b¨ng, thõèc kÂp,v.v...) m¡ kháng cÜ chöng ch× hoć gi¶y xŸc nhºn hiÎu ch×nh, vèi ½iËu kiÎn cŸc dòng cò n¡y ½õìc chÆ t−o phï hìp vèi cŸc tiÅu chu¸n thõçng m−i, ½õìc bö qu¨n thÏch hìp v¡ thõéng xuyÅn so chu¸n vèi cŸc dòng cò tõçng ½õçng khŸc. ‡¯ng kiÌm viÅn cñng cÜ thÌ ch¶p nhºn nhùng thiÆt bÙ ½õìc trang bÙ trÅn t¡u v¡ dïng ½Ì kiÌm tra cŸc thiÆt bÙ khŸc cða t¡u ( vÏ dò nhõ thiÆt bÙ ½o Ÿp su¶t, nhiÎt ½æ, vÝng quay,v.v...) trÅn cç sê chîng ½õìc hiÎu ch×nh hoć so sŸnh vèi cŸc thiÆt bÙ ½o lõéng ½a chöc n¯ng khŸc.

2 Ngõéi yÅu c·u kiÌm tra cñng c·n bâ trÏ nhùng ngõéi cÜ hiÌu biÆt vË cŸc qui ½Ùnh kiÌm tra ½Ì giŸm sŸt cáng viÎc chu¸n bÙ cho kiÌm tra v¡ trì giîp trong quŸ trÖnh kiÌm tra.

1.2.3 Ho¬n kiÌm tra

Cáng viÎc kiÌm tra cÜ thÌ bÙ ho¬n nÆu cáng tŸc chu¸n bÙ c·n thiÆt kháng ½õìc thúc hiÎn, hoć v°ng m´t nhùng ngõéi cÜ trŸch nhiÎm tham gia, hoć khi ‡¯ng kiÌm viÅn th¶y r±ng kháng ½¨m bö an to¡n ½Ì thúc hiÎn kiÌm tra.

1.2.4 KiÆn nghÙ

Sau khi kiÌm tra nÆu th¶y c·n thiÆt phï søa chùa, ‡¯ng kiÌm viÅn phï tháng bŸo kiÆn nghÙ cða mÖnh cho Chð t¡u hoć ‡−i diÎn cða Chð t¡u. Theo tháng bŸo, viÎc søa chùa phï ½õìc thúc hiÎn thÞa m¬n nhùng yÅu c·u do ‡¯ng kiÌm viÅn ½õa ra.

1.3 KiÌm tra xŸc nhºn cŸc Gi¶y chöng nhºn 1.3.1 Gi¶y chöng nhºn quâc tÆ vË ng¯n ng÷a á nhiÍm d·u (IOPP) hoć Gi¶y chöng nhºn tõçng ½õçng

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Khi tiÆn h¡nh kiÌm tra h¡ng n¯m v¡ trung gian, phï trÖnh Gi¶y chöng nhºn quâc tÆ vË ng¯n ng÷a á nhiÍm d·u (IOPP) hoć Gi¶y chöng nhºn tõçng ½õçng cho ‡¯ng kiÌm viÅn ½Ì xŸc nhºn hiÎu lúc cða Gi¶y chöng nhºn,v.v... cïng vèi sú chöng thúc cða ‡¯ng kiÌm viÅn v¡o Gi¶y chöng nhºn.

1.3.2 CŸc gi¶y chöng nhºn v¡ hã sç khŸc

1 Lîc kiÌm tra, cŸc Gi¶y chöng nhºn v¡ hã sç sau ½µy phï ½õìc trÖnh cho ‡¯ng kiÌm viÅn ½Ì xŸc nhºn r±ng cŸc Gi¶y chöng nhºn v¡ hã sç n¡y l¡ phï hìp v¡ ½õìc lõu giù thõéng trúc ê trÅn t¡u (tr÷ cŸc t¡u ½õìc lai d°t kháng cÜ ngõéi trúc). Tuy nhiÅn, khi tiÆn h¡nh kiÌm tra b¶t thõéng thÖ viÎc trÖnh cŸc Gi¶y chöng nhºn v¡ hã sç cho ‡¯ng kiÌm viÅn cÜ thÌ ½õìc gièi h−n ½âi vèi cŸc gi¶y té cÜ liÅn quan.

(1) Gi¶y chöng nhºn cða thiÆt bÙ phµn ly d·u - nõèc, hÎ thâng làc d·u, thiÆt bÙ xø lû, thiÆt bÙ ½o h¡m lõìng d·u v¡ thiÆt bÙ xŸc ½Ùnh ranh gièi d·u/nõèc,v.v... khi ‡¯ng kiÌm th¶y c·n thiÆt.

(2) T¡i liÎu hõèng d¹n qui trÖnh v¡ trang thiÆt bÙ cða hÎ thâng røa b±ng d·u thá ½¬ ½õìc duyÎt.

(3) T¡i liÎu hõèng d¹n thao tŸc hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u ½¬ ½õìc duyÎt.

(4) T¡i liÎu hõèng d¹n l¡m h¡ng v¡ sâ liÎu vË än ½Ùnh tai n−n ½¬ ½õìc duyÎt.

(5) T¡i liÎu hõèng d¹n sø dòng k¾t nõèc d±n s−ch.

(6) T¡i liÎu hõèng d¹n sø dòng hÎ thâng phµn dÝng chÿ.

(7) T¡i liÎu hõèng d¹n sø dòng d±n ½ć biÎt .

(8) Sä ghi ch¾p sâ liÎu cða hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u (tr÷ khi kiÌm tra ½¯ng kû).

(9) T¡i liÎu hõèng d¹n qui trÖnh v¡ trang thiÆt bÙ ½âi vèi viÎc x¨ cŸc ch¶t lÞng ½æc h−i ½¬ ½õìc duyÎt.

(10) Sä nhºt kû l¡m h¡ng.

(11) KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u.

(12) KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra.

2 Trong l·n kiÌm tra h¡ng n¯m hoć kiÌm tra trung gian, Gi¶y chöng nhºn quâc tÆ vË ng¯n ng÷a á nhiÍm do nõèc thï phï ½õìc trÖnh ‡¯ng kiÌm viÅn ½Ì xŸc nhºn h−n hiÎu lúc cða gi¶y chöng nhºn.

1.3.3 KiÌm tra xŸc nhºn cŸc hÎ thâng thiÆt bÙ cÜ liÅn quan

Khi kiÌm tra, cŸc h−ng mòc thiÆt bÙ sau ½µy phï ½õìc kiÌm l−i ½Ì ½¨m bö r±ng chîng ½¬ ½õìc kiÌm tra phï hìp vèi cŸc qui ½Ùnh cða TCVN 6259:2003 Qui ph−m Phµn c¶p v¡ ½Üng t¡u biÌn vÞ th¾p :

(1) HÎ thâng khÏ trç.

(2) ThiÆt bÙ ½ât d·u thï.

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TCVN 6276 : 2003, Ph·n 2, Chõçng 3

Chõçng 2 kiÌm tra l·n ½·u

2.1 KiÌm tra l·n ½·u trong quŸ trÖnh chÆ t−o 2.1.1 Qui ½Ùnh chung

Khi kiÌm tra l·n ½·u trong quŸ trÖnh chÆ t−o, kÆt c¶u v¡ cŸc hÎ thâng ½Ì ng¯n ng÷a á nhiÍm cða t¡u v¡ tay nghË thì thi cáng phï ½õìc kiÌm tra chi tiÆt ½Ì xŸc ½Ùnh r±ng chîng thÞa m¬n cŸc yÅu c·u tõçng öng trong t÷ng Ph·n cða Qui ph−m.

2.1.2 CŸc b¨n vÁ v¡ hã sç trÖnh duyÎt

1 T¡u b¶t kü khi kiÌm tra l·n ½·u phï trÖnh ‡¯ng kiÌm x¾t duyÎt hã sç kþ thuºt sau :

(1) HÎ thâng ng¯n ng÷a á nhiÍm do d·u t÷ buãng mŸy cða t¶t c¨ cŸc t¡u (a) Sç ½ã ½õéng âng hît khá (b) Sç ½ã ½õéng âng nõèc d±n (c) CŸc b¨n vÁ v¡ t¡i liÎu liÅn quan tèi hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u (d) CŸc b¨n vÁ v¡ t¡i liÎu liÅn quan tèi thiÆt bÙ phµn ly d·u - nõèc (thiÆt bÙ làc d·u) (e) CŸc b¨n vÁ bâ trÏ k¾t d·u cń (nÆu ½¬ ½õìc thÌ hiÎn ê b¨n vÁ sç ½ã ½õéng âng hît khá, thÖ kháng

yÅu c·u phï trÖnh b¨n vÁ n¡y) (f) CŸc b¨n vÁ v¡ hã sç khŸc khi ‡¯ng kiÌm th¶y c·n thiÆt.

(2) HÎ thâng ng¯n ng÷a á nhiÍm do d·u ½õìc chê xá trÅn cŸc t¡u d·u (a) B¨n tÏnh chiËu chÖm v¡ ½æ chîi cho t¡u ch−y ê tr−ng thŸi d±n liÅn quan ½Æn v¶n ½Ë gµy á nhiÍm

biÌn (b) B¨n tÏnh gièi h−n dung tÏch k¾t (c) B¨n tÏnh vÙ trÏ bö vÎ cða khoang nõèc d±n cŸch ly (d) än ½Ùnh tai n−n : (i) B¨n tÏnh än ½Ùnh tai n−n (ii) T¡i liÎu hõèng d¹n l¡m h¡ng v¡ tháng bŸo än ½Ùnh tai n−n (iii) Sç ½ã bâ trÏ h¡ng, b¨n tÏnh chiËu chÖm hoć ½æ chîi (iv) Sç ½ã bâ trÏ ½õéng âng, van v¡ cøa hît nõèc biÌn (e) Sç ½ã ½õéng âng ½âi vèi t÷ng hÎ thâng (f) Giù d·u l−i trÅn t¡u : (i) B¨n vÁ v¡ t¡i liÎu liÅn quan tèi hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u (ii) B¨n vÁ v¡ t¡i liÎu liÅn quan tèi thiÆt bÙ xŸc ½Ùnh ranh gièi d·u/ nõèc (iii) T¡i liÎu hõèng d¹n sø dòng hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u (g) HÎ thâng røa b±ng d·u thá : (i) B¨n vÁ v¡ t¡i liÎu liÅn quan tèi thiÆt bÙ røa k¾t (½ć tÏnh kþ thuºt) (ii) Sç ½ã ph−m vi ho−t ½æng (iii) B¨n vÁ bâ trÏ cŸc th¡nh ph·n kÆt c¶u thµn t¡u trong k¾t

(iv) B¨n vÁ bâ trÏ cŸc lå x¨ ½Ÿy (cÜ thÌ ½õìc ch¶p nhºn khi ½õìc thÌ hiÎn v¡o b¨n vÁ m´t c°t ph·n giùa t¡u)

(v) B¨n vÁ bâ trÏ cŸc dòng cò ½o möc ch¶t lÞng v¡ cŸc lå kho¾t dïng ½Ì ½o b±ng tay (vi) T¡i liÎu hõèng d¹n quy trÖnh v¡ trang thiÆt bÙ cða hÎ thâng røa b±ng d·u thá (h) K¾t nõèc d±n s−ch : (i) B¨n vÁ bâ trÏ k¾t nõèc d±n s−ch (ii) T¡i liÎu hõèng d¹n sø dòng k¾t nõèc d±n s−ch (i) HÎ thâng d±n ½ć biÎt : T¡i liÎu hõèng d¹n sø dòng hÎ thâng d±n ½ć biÎt (j) HÎ thâng phµn dÝng chÿ : T¡i liÎu hõèng d¹n sø dòng hÎ thâng phµn dÝng chÿ

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(k) CŸc b¨n vÁ v¡ t¡i liÎu khŸc khi ‡¯ng kiÌm th¶y c·n thiÆt.

(3) HÎ thâng ng¯n ng÷a á nhiÍm do ch¶t lÞng ½æc h−i cða t¡u chê xá ch¶t lÞng ½æc h−i : (a) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn hÎ thâng bçm (b) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn hÎ thâng røa sç bæ (c) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn hÎ thâng t¸y cń (gãm c¨ viÎc ½o möc cń b¬ bŸm trÅn cŸc bË m´t

k¾t) (d) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn thiÆt bÙ x¨ dõèi ½õéng nõèc (e) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn thiÆt bÙ ghi x¨ cń b¸n (f) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn thiÆt bÙ x¨ v¡o phõçng tiÎn tiÆp nhºn (g) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn hÎ thâng nõèc l¡m lo¬ng (h) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn hÎ thâng hµm h¡ng (i) B¨n vÁ v¡ t¡i liÎu liÅn quan ½Æn hÎ thâng l¡m s−ch b±ng tháng giÜ (j) T¡i liÎu hõèng d¹n qui trÖnh v¡ trang thiÆt bÙ ½Ì x¨ cŸc ch¶t lÞng ½æc h−i (k) B¨ng kÅ (danh mòc) h¡ng ½õìc chê trÅn t¡u (l) CŸc b¨n vÁ v¡ t¡i liÎu khŸc khi ‡¯ng kiÌm th¶y c·n thiÆt.

(4) ThiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï cða t¡u. (a) CŸc b¨n vÁ, hã sç v¡ ½ć tÏnh kþ thuºt liÅn quan tèi thiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï cða

t¡u ( bao gãm dung tÏch v¡ täng dung tÏch cða cŸc k¾t chöa, kiÌu/nh¡ chÆ t−o v¡ b¨n phá tá gi¶y chöng nhºn kiÌu m¹u cða tr−m xø lû nõèc thï v¡ cða hÎ thâng nghiËn v¡ khø trïng nõèc thï).

(b) Sç ½ã ½õéng âng nõèc thï ( bao gãm bÏch nâi bé tiÅu chu¸n, bâ trÏ ½õéng âng, van v¡ vºt liÎu chÆ t−o)

(c) CŸc b¨n vÁ v¡ hã sç khŸc m¡ ‡¯ng kiÌm th¶y c·n thiÆt.

(5) CŸc t¡i liÎu khŸc (a) KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u. (b) KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra.

2 Ngo¡i cŸc hã sç kþ thuºt trÖnh duyÎt quy ½Ùnh ê mòc -1 trÅn, phï trÖnh ‡¯ng kiÌm xem x¾t cŸc hã sç kþ thuºt sau :

(1) HÎ thâng ng¯n ng÷a á nhiÍm do d·u t÷ buãng mŸy cða t¶t c¨ cŸc t¡u (a) CŸc tháng sâ chÏnh cða mŸy (ghi rß dung tÏch cŸc k¾t cń b¸n) (b) CŸc b¨n vÁ v¡ t¡i liÎu khŸc khi ‡¯ng kiÌm th¶y c·n thiÆt

(2) HÎ thâng ng¯n ng÷a á nhiÍm do d·u ½õìc chê xá trÅn cŸc t¡u d·u (a) CŸc tháng sâ chÏnh cða thµn t¡u (ghi rß tý sâ ngºp chµn vÙt) (b) B¨n vÁ bâ trÏ chung (c) B¨n vÁ hoć b¨ng dung tÏch k¾t (d) B¨n vÁ trÖnh b¡y sú phµn bâ tràng tï khi kháng ½ð h¡ng (f) CŸc b¨n vÁ v¡ t¡i liÎu khŸc khi ‡¯ng kiÌm th¶y c·n thiÆt.

(3) HÎ thâng ng¯n ng÷a á nhiÍm do cŸc ch¶t lÞng ½æc h−i cða t¡u chê xá cŸc ch¶t lÞng ½æc h−i (a) CŸc tháng sâ chÏnh cða thµn t¡u (b) B¨n vÁ bâ trÏ chung (c) B¨n vÁ m´t c°t ph·n giùa t¡u (d) B¨n vÁ kÆt c¶u vŸch ng¯n

(e) CŸc b¨n vÁ v¡ t¡i liÎu khŸc khi ‡¯ng kiÌm th¶y c·n thiÆt.

(4) Khi sø dòng cŸc vºt liÎu cÜ chöa a mi ¯ng, thÖ phï cÜ hã sç nÅu vÙ trÏ sø dòng v¡ cŸc tháng tin chi tiÆt khŸc.

3 B¶t kÌ cŸc qui ½Ùnh ½¬ nÅu ê -1 v¡ -2 trÅn, nÆu mæt t¡u ½¬ ½õìc ½Üng hoć hÎ thâng ng¯n ng÷a á nhiÍm ½¬ ½õìc chÆ t−o hoć l°p ½´t sø dòng cŸc b¨n vÁ v¡ t¡i liÎu ½¬ duyÎt, thÖ viÎc trÖnh duyÎt mæt ph·n hoć to¡n bæ cŸc b¨n vÁ v¡ t¡i liÎu ½¬ nÅu ê -1 v¡ -2 cÜ thÌ ½õìc miÍn gi¨m theo cŸc qui ½Ùnh ½õìc ‡¯ng kiÌm qui ½Ùnh riÅng.

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2.1.3 KiÌm tra kÆt c¶u v¡ thiÆt bÙ

1 Phï tiÆn h¡nh kiÌm tra cŸc h−ng mòc sau ½µy cða hÎ thâng ng¯n ng÷a á nhiÍm do d·u t÷ buãng mŸy cða t¶t c¨ cŸc t¡u :

(1) ThiÆt bÙ kiÌm soŸt viÎc x¨ nõèc ½Ÿy t¡u nhiÍm d·u t÷ buãng mŸy (a) Phï ½¨m bö thÞa m¬n nhùng yÅu c·u vË l°p ½´t v¡ ho−t ½æng cða hÎ thâng phµn ly/làc d·u -

nõèc, hÎ thâng xø lû, v¡ dòng cò ½o h¡m lõìng d·u. Tuy nhiÅn, viÎc xŸc nhºn ho−t ½æng cÜ thÌ ½õìc thúc hiÎn qua viÎc thø gi¨ ½Ùnh theo tr−ng thŸi l¡m viÎc hoć cŸc phõçng phŸp thay thÆ tõçng ½õçng khŸc.

(b) Phï ½¨m bö thÞa m¬n nhùng yÅu c·u vË l°p ½´t v¡ ho−t ½æng cða hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u bao gãm c¨ cŸc thao tŸc ½iËu khiÌn tú ½æng v¡ ½iËu khiÌn b±ng tay cða thiÆt bÙ ng°t x¨ ½´t ê ½õéng âng x¨. Tuy nhiÅn, viÎc xŸc nhºn ho−t ½æng cÜ thÌ ½õìc thúc hiÎn qua viÎc thø gi¨ ½Ùnh theo tr−ng thŸi l¡m viÎc hoć cŸc phõçng phŸp thay thÆ tõçng ½õçng khŸc.

(c) Phï ½¨m bö thÞa m¬n nhùng yÅu c·u vË ho−t ½æng cða cŸc thiÆt bÙ ghi v¡ ch× bŸo ½õìc l°p ½´t v¡o hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u hoć cða thiÆt bÙ ghi ½õìc g°n v¡o dòng cò ½o h¡m lõìng d·u.

(d) Phï ½¨m bö trang bÙ ½ð cŸc ½ã dïng nhõ cuæn gi¶y ghi dïng cho thiÆt bÙ ghi. (e) Phï ½¨m bö chöc n¯ng bŸo ½æng cða hÎ thâng làc d·u. (f) Phï thø thiÆt bÙ ng°t tú ½æng cða hÎ thâng làc d·u.

(2) K¾t d·u ½ât Phï ½¨m bö sú tŸch biÎt giùa hÎ thâng d·u ½ât v¡ hÎ thâng nõèc d±n.

(3) K¾t d·u b¸n (a) K¾t d·u b¸n hoć k¾t giù nõèc ½Ÿy t¡u, v¡ trang thiÆt bÙ x¨ liÅn quan phï ½õìc kiÌm tra ½Ì xem x¾t

möc ½æ phï hìp cða chîng. (b) ThiÆt bÙ l¡m ½ãng nh¶t hoć thiÆt bÙ kiÌm tra cń b¸n ½õìc ch¶p nhºn khŸc phï ½õìc kiÌm tra ½Ì

xem x¾t chîng ho−t ½æng cÜ thÞa m¬n kháng. Tuy nhiÅn, viÎc Ÿp dòng qui ½Ùnh n¡y phï ½õìc gièi h−n cho trõéng hìp kÏch thõèc cða cŸc k¾t ½Ü ½¬ ½õìc th÷a nhºn phï hìp vèi cŸc qui ½Ùnh ê 2.2.1-1(2) trong Ph·n 3 Qui ph−m n¡y.

(4) BÏch nâi x¨ tiÅu chu¸n Phï xŸc nhºn sú thÞa m¬n cða bÏch nâi x¨ tiÅu chu¸n.

2 Phï tiÆn h¡nh kiÌm tra cŸc h−ng mòc cða cŸc thiÆt bÙ sau ½µy dïng ½Ì ng¯n ng÷a á nhiÍm do d·u chê xá trÅn cŸc t¡u d·u :

(1) K¾t d±n cŸch ly (a) Phï ½¨m bö sú l°p ½´t cŸc bçm, âng v¡ van cða hÎ thâng k¾t d±n cŸch ly l¡ thÞa m¬n. (b) Phï ½¨m bö r±ng kháng cÜ ½iÌm nâi giùa hÎ thâng d·u h¡ng v¡ hÎ thâng d±n cŸch ly. (c) Khi trang bÙ cŸc âng mËm xŸch tay dïng ½Ì x¨ d±n cða cŸc k¾t d±n cŸch ly trong trõéng hìp sú câ

b±ng cŸch nâi k¾t ½Ü ½Æn bçm d·u h¡ng, thÖ phï ½¨m bö r±ng mæt van mæt chiËu ½¬ ½õìc l°p cho ½õéng âng d¹n nõèc d±n cŸch ly, v¡ âng mËm ½Ü ½õìc ½´t t−i mæt nçi dÍ th¶y trong buãng bçm cÜ g°n b¨ng quy ½Ùnh vË phõçng thöc sø dòng âng mËm ½Ü.

(d) Phï ½¨m bö r±ng ½õéng âng d¹n nõèc d±n ½i qua cŸc k¾t d·u h¡ng v¡ ½õéng âng d·u h¡ng ½i qua cŸc k¾t nõèc d±n kháng cÜ rÝ r×.

(2) HÎ thâng røa b±ng d·u thá (a) Phï ½¨m bö r±ng hÎ thâng røa b±ng d·u thá ½¬ ½õìc l°p ½´t thÞa m¬n vèi cŸc qui ½Ùnh 3.4 trong

Ph·n 3, ½ć biÎt cŸc h−ng mòc t÷ (i) ½Æn (ix) dõèi ½µy : (i) KiÌm tra ½Ì xŸc ½Ùnh r±ng cŸc âng, bçm, van v¡ thiÆt bÙ røa ½´t trÅn boong kháng cÜ cŸc d¶u

hiÎu rÝ r×, v¡ cŸc giŸ ½ë âng, cŸc chi tiÆt khÜa, kÂp, v.v... cða ½õéng âng røa b±ng d·u thá l¡ ch°c ch°n v¡ nguyÅn vÂn.

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TCVN 6276 : 2003, Ph·n 2, Chõçng 2

(ii) CŸc bæ phºn cða hÎ thâng røa b±ng d·u thá phï ½õìc thø b±ng Ÿp lúc ½Æn 1,5 l·n Ÿp su¶t l¡m viÎc.

(iii) Khi cŸc bæ phºn d¹n ½æng kháng ½õìc hìp th¡nh trong thiÆt bÙ røa k¾t, thÖ phï bö ½¨m r±ng bæ phºn d¹n ½æng cÜ thÌ dïng ½õìc theo sâ lõìng nhõ ½¬ qui ½Ùnh trong t¡i liÎu hõèng d¹n ½¬ cÜ ½ð ê trÅn t¡u.

(iv) Khi trang bÙ b·u hµm nõèc røa dïng hçi, thÖ phï ½¨m bö r±ng chîng cÜ thÌ ng°t bÙ ho¡n to¡n trong lîc røa b±ng d·u thá hoć b±ng cŸc van ng°t k¾p hoć b±ng mæt bÏch chń cÜ thÌ nhºn biÆt rß r¡ng.

(v) Phï ½¨m bö r±ng cŸc phõçng tiÎn liÅn l−c ½¬ qui ½Ùnh giùa buãng quan sŸt ½´t ê trÅn boong v¡ buãng kiÌm soŸt h¡ng l¡m viÎc tât.

(vi) Phï bö ½¨m r±ng cŸc bçm c¶p cða hÎ thâng røa b±ng d·u thá ½¬ ½õìc trang bÙ mæt thiÆt bÙ an to¡n ½Ë phÝng sú quŸ Ÿp hoć cŸc thiÆt bÙ ½õìc ch¶p nhºn khŸc.

(vii) Phï bö ½¨m r±ng cŸc âng mËm cung c¶p d·u cho thiÆt bÙ røa cða mæt t¡u hån hìp l¡ kiÌu ½¬ ½õìc duyÎt, v¡ chîng ½õìc bö qu¨n thÏch hìp v¡ s³n s¡ng ½Ì sø dòng.

(viii)Thø ho−t ½æng cða bçm v¡ thiÆt bÙ røa b±ng d·u thá Bçm v¡ thiÆt bÙ cða hÎ thâng røa b±ng d·u thá phï ½õìc thø ho−t ½æng b±ng nõèc biÌn.

(ix) Thø ½ć tÏnh cða hÎ thâng t¸y cń: Thø cŸc ½ć tÏnh cða hÎ thâng t¸y cń phï ½õìc tiÆn h¡nh trong quŸ trÖnh thø ho−t ½æng nÅu ê (viii) trÅn.

(b) CŸc thao tŸc ho−t ½æng røa b±ng d·u thá phï ½õìc thúc hiÎn b±ng viÎc sø dòng cŸc trang thiÆt bÙ ½¬ ½õìc duyÎt v¡ theo t¡i liÎu hõèng d¹n Quy trÖnh v¡ trang thiÆt bÙ. Phï chöng minh ½õìc tÏnh hiÎu qu¨ cða hÎ thâng røa b±ng d·u thá thÞa m¬n cŸc qui ½Ùnh 3. 4 ê Ph·n 3, v¡ ½ć biÎt cŸc h−ng mòc nÅu trong b¨ng 2-1 tuü thuæc v¡o kiÌu t¡u, v¡ lo−i k¾t c·n kiÌm tra. Tuy nhiÅn, viÎc kiÌm tra n¡y cÜ tiÆn h¡nh trong vÝng mæt n¯m tÏnh t÷ lîc t¡u b°t ½·u chê d·u thá m¡ ½ć tÏnh cða lo−i d·u thá n¡y thÏch hìp ½Ì røa b±ng d·u thá hoć tÏnh t÷ lîc ho¡n th¡nh chuyÆn chê d·u thá l·n thö 3, tiÆn h¡nh theo trõéng hìp n¡o muæn hçn. Khi ½õìc ‡¯ng kiÌm xŸc nhºn r±ng ½âi vèi cŸc t¡u d·u giâng nhau vË mài phõçng diÎn, thÖ cŸc kiÌm tra c·n thiÆt ch× c·n Ÿp dòng cho mæt trong cŸc t¡u ½Ü.

(3) Giù d·u l−i trÅn t¡u (a) ‡¨m bö r±ng hÎ thâng cŸc k¾t l°ng hoć k¾t d·u h¡ng cÜ thÌ sø dòng l¡m k¾t l°ng, v¡ hÎ thâng

âng d¹n cÜ liÅn quan ê tr−ng thŸi l¡m viÎc tât. (b) KiÌm tra hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u v¡ hÎ thâng ½õéng âng phòc vò liÅn quan. ‡ć biÎt

kiÌm tra cŸc h−ng mòc sau : (i) ‡¨m bö r±ng hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u bao gãm c¨ cŸc thiÆt bÙ tú ½æng v¡ b±ng

tay ½õìc trang bÙ ½Ì ng÷ng thï, hÎ thâng khÜa liÅn ½æng khêi ½æng, ½æ nh−y théi gian cða dòng cò ½o h¡m lõìng d·u (phï kháng quŸ 20 giµy) v¡ ½æ chÏnh xŸc cða lõu lõìng kÆ (kháng quŸ ±15% lõu lõìng thúc tÆ) ê trong tr−ng thŸi l¡m viÎc tât. Tuy nhiÅn, viÎc xŸc nhºn ho−t ½æng cÜ thÌ ½õìc thúc hiÎn b±ng viÎc thø gi¨ ½Ùnh theo tr−ng thŸi l¡m viÎc hoć cŸc phõçng phŸp tõçng ½õçng khŸc.

(ii) ‡¨m bö r±ng cŸc thiÆt bÙ ch× bŸo v¡ ghi ½õìc l°p cho hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u ê trong tr−ng thŸi l¡m viÎc tât.

(iii) Thø chöc n¯ng cða cŸc thiÆt bÙ bŸo ½æng b±ng Ÿnh sŸng v¡ µm thanh l°p cho hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u.

(iv) ‡¨m bö r±ng cŸc vºt tõ dú trù cho thiÆt bÙ ghi ½¬ ½õìc trang bÙ ½ð trÅn t¡u. (c) ‡¨m bö r±ng thiÆt bÙ xŸc ½Ùnh ranh gièi d·u/ nõèc cÜ kiÌu ½õìc duyÎt ½¬ ½õìc trang bÙ trÅn t¡u v¡

ê trong tr−ng thŸi l¡m viÎc tât.

(4) Bçm, ½õéng âng v¡ thiÆt bÙ x¨ (a) ‡¨m bö r±ng viÎc bâ trÏ ½õéng âng x¨ ½Ì thï nõèc d±n b¸n hoć nõèc nhiÍm d·u l¡ thÞa m¬n. (b) ‡¨m bö r±ng vÙ trÏ ½iËu khiÌn x¨ v¡ vÙ trÏ quan sŸt ½Ì quan sŸt b±ng m°t viÎc x¨ nõèc bÙ nhiÍm

d·u bao gãm c¨ viÎc thø ½Ì xŸc nhºn chöc n¯ng phâi hìp giùa chîng l¡ thÞa m¬n.

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(c) ‡¨m bö r±ng hÎ thâng t¸y s−ch, k¾t l°ng, k¾t h¡ng hoć cŸc hÎ thâng ½Ì hît khá t¶t c¨ cŸc bçm h¡ng v¡ t¶t c¨ cŸc âng d¹n d·u kÌ c¨ hÎ thâng nâi gh¾p ½Ì nâi vèi phõçng tiÎn tiÆp nhºn ½Ì x¨ nõèc d±n b¸n hoć nõèc bÙ nhiÍm b¸n l¡ thÞa m¬n.

(5) Bâ trÏ Phï ½¨m bö r±ng hÎ thâng chuyÌn h¡ng v¡ cŸc thiÆt bÙ ½Üng ½õìc trang bÙ trÅn cŸc ½õéng âng d¹n d·u

h¡ng ½Ì cŸch ly cŸc k¾t vèi nhau l¡ phï hìp.

(6) Phµn khoang v¡ än ½Ùnh Bä sung thÅm v¡o quy ½Ùnh ½õìc nÅu ê (5) trÅn, phï ½¨m bö r±ng viÎc bâ trÏ ½Ì ng¯n ng÷a sú ngºp

nõèc tiÆp diÍn v¡o cŸc khoang l¡ phï hìp.

(7) KiÌm tra viÎc bâ trÏ cŸc k¾t nõèc d±n s−ch (a) Phï ½¨m bö r±ng viÎc bâ trÏ bçm, ½õéng âng v¡ van phï hìp vèi cŸc b¨n vÁ ½¬ ½õìc duyÎt, v¡

thúc sú chîng ½¬ ½õìc trang bÙ v¡ ê trong tr−ng thŸi l¡m viÎc tât. (b) KiÌm tra b±ng m°t k¾t nõèc d±n s−ch ½Ì xŸc nhºn kháng cÜ sú nhiÍm d·u. (c) CŸc h−ng mòc ½õìc nÅu ê (1)(d) trÅn.

(8) HÎ thâng d±n ½ć biÎt Phï ½¨m bö r±ng hÎ thâng d±n ½ć biÎt ½¬ ½õìc bâ trÏ phï hìp vèi b¨n vÁ ½¬ duyÎt v¡ ê trong tr−ng thŸi l¡m viÎc tât.

(9) HÎ thâng phµn dÝng chÿ Phï ½¨m bö r±ng hÎ thâng phµn dÝng chÿ l¡m viÎc tât.

3 ViÎc kiÌm tra cŸc h−ng mòc sau ½µy phï ½õìc tiÆn h¡nh ½âi vèi thiÆt bÙ ½Ì ng¯n ng÷a viÎc x¨ ch¶t lÞng ½æc t÷ cŸc t¡u chê xá cŸc ch¶t lÞng ½æc h−i :

(1) HÎ thâng røa sç bæ (a) Phï ½¨m bö r±ng hÎ thâng ½õìc l°p ½´t phï hìp vèi cŸc b¨n vÁ v¡ t¡i liÎu hõèng d¹n qui trÖnh v¡

trang thiÆt bÙ ½¬ ½õìc duyÎt, v¡ hÎ thâng ê trong tr−ng thŸi l¡m viÎc tât. (b) Khi ½õìc trang bÙ hÎ thâng hµm nõèc røa phï ½¨m bö r±ng hÎ thâng n¡y ½õìc l°p ½´t phï hìp vèi

cŸc b¨n vÁ ½¬ ½õìc duyÎt, v¡ hÎ thâng ê trong tr−ng thŸi l¡m viÎc tât. (c) Khi dïng thiÆt bÙ røa di ½æng, phï ½¨m bö r±ng sâ lõìng v¡ vÙ trÏ cða cŸc lå kho¾t ½Ì røa k¾t ½õìc

bâ trÏ phï hìp vèi cŸc b¨n vÁ ½¬ ½õìc duyÎt.

(2) HÎ thâng t¸y cń (a) Phï ½¨m bö r±ng hÎ thâng t¸y cń ½¬ ½õìc l°p ½´t phï hìp vèi cŸc b¨n vÁ ½¬ ½õìc duyÎt, v¡ ê

trong tr−ng thŸi l¡m viÎc tât. (b) Phï ½¨m bö r±ng lõìng cń t¸y ½õìc xŸc ½Ùnh b±ng viÎc kiÌm nghiÎm nõèc theo qui trÖnh v¡

phõçng phŸp tÏnh ½¬ duyÎt n±m trong ph−m vi giŸ trÙ nÅn ê B¨ng 4-8 ½iËu 4.3.2 Ph·n 4. (c) Khi trang bÙ cŸc âng mËm di ½æng v¡ cŸc cît nâi, phï ½¨m bö r±ng chîng ½õìc c¶t giù trÅn t¡u.

(3) Lå x¨ dõèi ½õéng nõèc (a) Phï ½¨m bö r±ng lå x¨ phÏa dõèi ½õéng nõèc ½¬ ½õìc bâ trÏ phï hìp vèi cŸc b¨n vÁ ½¬ duyÎt. (b) Phï ½¨m bö r±ng cÜ cŸc biÎn phŸp ½Ì phµn cŸch lå x¨ dõèi ½õéng nõèc vèi cŸc lå x¨ ê phÏa trÅn

½õéng nõèc.

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TCVN 6276 : 2003, Ph·n 2, Chõçng 2

B¨ng 2-1 xŸc nhºn tÏnh hiÎu qu¨ cða hÂ thâng røa b±ng d·u thá

KiÌu t¡u K¾t KiÌm tra v¡ thø nghiÎm

1. ‡âi vèi cŸc t¡u d·u tho¨ m¬n 3.2.4(1)(a) Ph·n 3

(1) K¾t d·u h¡ng

i/ XŸc nhºn tÏnh hiÎu qu¨ cða hÎ thâng t¸y cń

CŸc ho−t ½æng cða hÎ thâng t¸y cń phï ½õìc xŸc nhºn b±ng viÎc theo dßi cŸc thiÆt bÙ ghi v¡ ch× bŸo möc d·u quy ½Ùnh ê 3.4.5(6) Ph·n 3 trong quŸ trÖnh røa ½Ÿy k¾t.

ii/ XŸc nhºn sú ho−t ½æng phï hìp cða cŸc bçm v¡ thiÆt bÙ røa d·u thá

Ho−t ½æng thÏch hìp cða thiÆt bÙ røa phï ½õìc giŸm sŸt theo cŸc tháng sâ vË Ÿp su¶t c¶p, chu kü théi gian, chöc n¯ng mŸy ( CŸc thiÆt bÙ ch× bŸo ho−t ½æng v¡ µm thanh) hoć b±ng cŸc phõçng phŸp ½õìc ch¶p thuºn khŸc.

iii/ XŸc nhºn tr−ng thŸi cða ½Ÿy khoang h¡ng sau khi røa

Khi ½¬ ho¡n th¡nh cáng viÎc røa v¡ hît khá l·n cuâi, måi khoang h¡ng phï ½õìc kiÌm tra trúc tiÆp cŸc ph·n ½·u, giùa v¡ cuâi ½Ì xŸc nhºn r±ng ½Ÿy cða t÷ng khoang h¡ng ½¬ ½õìc l¡m khá*1. CŸc l·n kiÌm tra n¡y phï ½õìc ghi v¡o Sä tay quy trÖnh v¡ trang thiÆt bÙ.

iv/ ViÎc thø v¡ kiÌm tra quy ½Ùnh t÷ i/ ½Æn iii/ trÅn cÜ thÌ ch× c·n Ÿp dòng cho mæt trong sâ cŸc khoang h¡ng cÜ c¶u hÖnh giâng nhau.

v/ KiÌm tra bÅn trong cŸc khoang h¡ng cÜ thÌ phï ½õìc tiÆn h¡nh nÆu ‡¯ng kiÌm viÅn x¾t th¶y c·n thiÆt.

2. ‡âi vèi cŸc t¡u khŸc kháng nÅu ê trÅn

(1) K¾t d·u h¡ng

i/ CŸc quy ½Ùnh tõçng tú nhõ nÅu ê trÅn

(2) K¾t d·u h¡ng/d±n sú câ

i/ CŸc quy ½Ùnh tõçng tú nhõ nÅu ê trÅn

ii/ XŸc ½Ùnh d·u näi trÅn bË m´t nõèc d±n

TiÆn h¡nh ½o xŸc ½Ùnh täng lõìng d·u näi trÅn bË m´t nõèc d±n sú câ ½Ì xŸc nhºn r±ng tý sâ thÌ tÏch cða lõìng d·u näi trÅn to¡n bæ nõèc d±n sú câ v¡ thÌ tÏch cŸc k¾t kháng võìt quŸ 0.00085.

Chî thÏch:

* 1 KhŸi niÎm “ khá” : Tham khö 3.4.5(4) Ph·n 3 Qui ph−m

(4) ThiÆt bÙ ghi viÎc x¨ cń b¸n (a) Khi trang bÙ bçm cÜ lõu lõìng thay ½äi, thÖ phï ½¨m bö r±ng cÜ thÌ ½iËu khiÌn ½õìc lõu lõìng

cða bçm theo ½îng t¡i liÎu hõèng d¹n ½¬ ½õìc duyÎt. (b) Khi trang bÙ bçm cÜ lõu lõìng kháng ½äi, thÖ phï ½¨m bö r±ng lõu lõìng ê trong ph−m vi giŸ trÙ

½¬ ½Ùnh. (c) Phï ½¨m bö b±ng viÎc thø lõu lõìng töc théi ½Ì xŸc ½Ùnh r±ng ½æ chÏnh xŸc cða lõu lõìng kÆ l¡ ±

15% hoć chÏnh xŸc hçn. (d) Phï ½¨m bö r±ng thiÆt bÙ ghi ê trong tr−ng thŸi l¡m viÎc tât.

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(5) HÎ thâng x¨ v¡o phõçng tiÎn tiÆp nhºn Phï ½¨m bö r±ng hÎ thâng ½Ì x¨ v¡o phõçng tiÎn tiÆp nhºn ½¬ ½õìc l°p ½´t phï hìp vèi cŸc b¨n vÁ ½¬ ½õìc duyÎt, v¡ ê trong tr−ng thŸi l¡m viÎc tât.

(6) HÎ thâng nõèc l¡m lo¬ng Phï ½¨m bö r±ng hÎ thâng nõèc l¡m lo¬ng ½¬ ½õìc l°p ½´t phï hìp vèi b¨n vÁ ½¬ ½õìc duyÎt, v¡ ê trong tr−ng thŸi l¡m viÎc tât.

(7) HÎ thâng hµm h¡ng Phï ½¨m bö r±ng hÎ thâng hµm h¡ng ½¬ ½õìc l°p ½´t phï hìp vèi cŸc b¨n vÁ ½¬ duyÎt, v¡ ê trong tr−ng thŸi l¡m viÎc tât.

(8) HÎ thâng l¡m s−ch b±ng tháng giÜ (a) Phï ½¨m bö r±ng hÎ thâng l¡m s−ch b±ng tháng giÜ ½õìc l°p ½´t phï hìp vèi cŸc b¨n vÁ ½¬

duyÎt, v¡ ê trong tr−ng thŸi l¡m viÎc tât. (b) Khi dïng thiÆt bÙ l¡m s−ch di ½æng, phï ½¨m bö ½−t ½õìc lõu lõìng qu−t thäi c·n thiÆt.

4 KiÌm tra phï ½õìc tiÆn h¡nh theo cŸc h−ng mòc dõèi ½µy ½âi vèi thiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï cða t¡u:

(1) ‡¨m bö r±ng thiÆt bÙ ½¬ ½õìc l°p ½´t phï hìp vèi b¨n vÁ ½¬ ½õìc duyÎt

(2) ‡¨m bö r±ng ½õéng âng thï v¡ bÏch nâi tiÅu chu¸n nÅu ê 2.2.1 Ph·n 7 Qui ph−m ½¬ ½õìc trang bÙ phï hìp vèi b¨n vÁ ½¬ ½õìc duyÎt.

(3) ‡¨m bö r±ng thiÆt bÙ nÅu ê (1) v¡ cŸc bçm liÅn quan nÅu ê (2) trong tr−ng thŸi l¡m viÎc tât. 2.2 KiÌm tra l·n ½·u kháng cÜ sú giŸm sŸt trong quŸ trÖnh chÆ t−o 2.2.1 Qui ½Ùnh chung

Khi kiÌm tra l·n ½·u kháng cÜ sú giŸm sŸt trong quŸ trÖnh chÆ t−o, phï tiÆn h¡nh kiÌm tra cŸc kÆt c¶u v¡ trang thiÆt bÙ ½Ì ng¯n ng÷a á nhiÍm, v¡ phï bö ½¨m r±ng chîng thÞa m¬n cŸc qui ½Ùnh ½õìc nÅu trong Qui ph−m n¡y.

2.2.2 Hã sç kþ thuºt trÖnh duyÎt

B¶t kü t¡u n¡o muân ½õìc kiÌm tra l·n ½·u kháng cÜ sú giŸm sŸt trong quŸ trÖnh chÆ t−o, phï trÖnh duyÎt hã sç kþ thuºt c·n thiÆt quy ½Ùnh ê 2.1.2 Ph·n 2.

2.2.3 KiÌm tra kÆt c¶u v¡ trang thiÆt bÙ

Khi kiÌm tra l·n ½·u kháng cÜ sú giŸm sŸt trong quŸ trÖnh chÆ t−o, thÖ phï tiÆn h¡nh cŸc kiÌm tra liÅn quan tèi nhùng yÅu c·u thÏch ½Ÿng qui ½Ùnh ê 2.1.3 cða Ph·n n¡y. Tuy nhiÅn, ½âi vèi t¡u cÜ cŸc Gi¶y chöng nhºn vË ng¯n ng÷a á nhiÍm hoć Gi¶y chöng nhºn tõçng ½õçng, thÖ tiÆn h¡nh kiÌm tra phï hìp vèi cŸc qui ½Ùnh ½õìc nÅu ê 3.3 Ph·n 2 Qui ph−m n¡y.

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TCVN 6276 : 2003, Ph·n 2, Chõçng 3

Chõçng 3 kiÌm tra chu kü

3.1 KiÌm tra h¡ng n¯m 3.1.1 Qui ½Ùnh chung

T−i måi l·n kiÌm tra h¡ng n¯m, phï tiÆn h¡nh kiÌm tra theo cŸc h−ng mòc tõçng öng cða cŸc qui ½Ùnh ½õìc nÅu ê 3.1.2 Ph·n n¡y, v¡ c·n thiÆt phï kiÌm tra thÅm tr−ng thŸi chung cða kÆt c¶u v¡ thiÆt bÙ liÅn quan.


1 Cáng viÎc kiÌm tra sau ½µy phï ½õìc tiÆn h¡nh ½âi vèi thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u t÷ buãng mŸy cða t¶t c¨ cŸc t¡u :

(1) HÎ thâng kiÌm soŸt x¨ nõèc ½Ÿy t¡u nhiÍm d·u t÷ buãng mŸy. (a) KiÌm tra trúc tiÆp thiÆt bÙ phµn ly d·u- nõèc, hÎ thâng làc d·u, hÎ thâng xø lû v¡ dòng cò ½o h¡m

lõìng d·u. (b) KiÌm tra trúc tiÆp hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u. (c) KiÌm tra ½Ì ½¨m bö sú ho−t ½æng thÞa m¬n cða cŸc phõçng tiÎn ng÷ng x¨ tú ½æng hoć b±ng tay

½õìc l°p cho hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u. (d) KiÌm tra ½Ì ½¨m bö sú ho−t ½æng thÞa m¬n cða cŸc thiÆt bÙ ch× bŸo v¡ ghi cða hÎ thâng ghi v¡

kiÌm soŸt viÎc x¨ d·u, v¡ cŸc vºt tõ c·n thiÆt vèi sâ lõìng ½ð dïng cho thiÆt bÙ ghi ½¬ cÜ ê trÅn t¡u. (e) Thø tÏn hiÎu bŸo ½æng cða hÎ thâng làc d·u. (f) Thø thiÆt bÙ ng°t tú ½æng cða hÎ thâng làc d·u.

(2) K¾t d·u ½ât KiÌm tra ½Ì ½¨m bö sú tŸch biÎt cða hÎ thâng d·u ½ât v¡ hÎ thâng nõèc d±n.

(3) K¾t d·u cń (a) KiÌm tra ½Ì ½¨m bö r±ng k¾t ½Ì chöa d·u cń, k¾t l°ng v¡ thiÆt bÙ x¨ cða chîng l¡ thÞa m¬n. (b) KiÌm tra ½Ì ½¨m bö r±ng thiÆt bÙ l¡m ½ãng nh¶t hoć thiÆt bÙ ½õìc ch¶p nhºn khŸc ½Ì kiÌm soŸt

cń d·u trong tr−ng thŸi l¡m viÎc tât. Tuy nhiÅn, qui ½Ùnh n¡y ch× Ÿp dòng khi qui cŸch k¾t ½Ì chöa cń d·u ½¬ ½õìc ch¶p nhºn phï hìp vèi cŸc qui ½Ùnh 2.2.1-1(2) Ph·n 3 cða Qui ph−m n¡y.

(4) BÏch nâi x¨ tiÅu chu¸n KiÌm tra ½Ì ½¨m bö ½¬ trang bÙ bÏch nâi x¨ tiÅu chu¸n .

2 Phï tiÆn h¡nh kiÌm tra theo cŸc h−ng mòc sau ½µy ½âi vèi kÆt c¶u v¡ thiÆt bÙ ½Ì ng¯n ng÷a á nhiÍm do d·u chê xá trÅn cŸc t¡u d·u :

(1) K¾t d±n cŸch ly (a) KiÌm tra ½Ì ½¨m bö r±ng kháng cÜ ½iÌm nâi giùa cŸc ½õéng âng d¹n d·u h¡ng v¡ cŸc ½õéng âng

nõèc d±n. (b) Khi trang bÙ cŸc ½o−n âng mËm dïng ½Ì thŸo d±n cho cŸc k¾t d±n cŸch ly trong trõéng hìp sú câ

nhé nâi cŸc k¾t ½Ü vèi vèi bçm d·u h¡ng, thÖ phï ½¨m bö cÜ mæt van mæt chiËu ½õìc l°p trÅn ½õéng âng nõèc d±n cŸch ly v¡ cÜ mæt biÌn hiÎu câ ½Ùnh nÅu viÎc h−n chÆ viÎc sø dòng cŸc âng mËm ½Ü g°n ê mæt chå dÍ nhÖn th¶y trong buãng bçm.

(c) KiÌm tra ½Ì ½¨m bö kháng cÜ d¶u hiÎu nhiÍm b¸n d·u trong cŸc k¾t d±n cŸch ly.

(2) HÎ thâng røa b±ng d·u thá (a) KiÌm tra ½Ì ½¨m bö r±ng cŸc yÅu c·u cða hÎ thâng røa b±ng d·u thá l¡ thÞa m¬n, v¡ ½ć biÎt phï

tiÆn h¡nh kiÌm tra cŸc h−ng mòc t÷ (i) ½Æn (vi) sau ½µy : (i) KiÌm tra b±ng m°t ½Ì ½¨m bö kháng cÜ d¶u hiÎu rÝ r× trÅn cŸc ½õéng âng, bçm, van v¡ thiÆt

bÙ røa ½´t trÅn boong cða hÎ thâng røa b±ng d·u thá, v¡ t¶t c¨ cŸc giŸ ½ë ½õéng âng d·u røa l¡ nguyÅn vÂn.

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(ii) Khi cŸc bæ phºn d¹n ½æng kháng hìp th¡nh v¡o trong cŸc thiÆt bÙ røa k¾t thÖ phï bö ½¨m r±ng cŸc bæ phºn d¹n ½æng ½Ü cÜ kh¨ n¯ng sø dòng theo sâ lõìng ½¬ ½Ùnh ghi trong t¡i liÎu hõèng d¹n sø dòng ½¬ ½õìc trang bÙ trÅn t¡u.

(iii) Khi trang bÙ cŸc b·u hµm nõèc røa dïng hçi, phï bö ½¨m r±ng chîng cÜ thÌ ng°t ho¡n to¡n trong lîc ½ang røa b±ng d·u thá hoć b±ng cŸc van ng°t k¾p hoć b±ng mæt bÏch chń cÜ thÌ nhºn biÆt rß r¡ng.

(iv) KiÌm tra ½Ì ½¨m bö r±ng cŸc thiÆt bÙ tháng tin liÅn l−c theo qui ½Ùnh giùa buãng quan sŸt ½´t trÅn boong v¡ buãng kiÌm soŸt h¡ng ê trong tr−ng thŸi l¡m viÎc tât.

(v) KiÌm tra ½Ì ½¨m bö r±ng cŸc bçm c¶p cða hÎ thâng røa b±ng d·u thá ½¬ ½õìc trang bÙ mæt thiÆt bÙ an to¡n quŸ Ÿp hoć cŸc thiÆt bÙ ½õìc ch¶p nhºn khŸc.

(vi) KiÌm tra ½Ì ½¨m bö r±ng cŸc âng mËm cung c¶p d·u cho thiÆt bÙ røa cða mæt t¡u chê h¡ng hån hìp l¡ kiÌu ½¬ ½õìc duyÎt, v¡ chîng ½¬ ½õìc bö qu¨n mæt cŸch thÏch hìp v¡ s³n s¡ng ½Ì sø dòng.

(3) Giù d·u l−i trÅn t¡u (a) KiÌm tra hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u v¡ sú bâ trÏ ½õéng âng d¹n liÅn quan, ½ć biÎt kiÌm

tra cŸc h−ng mòc sau : (i) KiÌm tra trúc tiÆp hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u v¡ trang thiÆt bÙ liÅn quan. (ii) KiÌm tra ½Ì ½¨m bö r±ng thiÆt bÙ tú ½æng v¡ b±ng tay ½õìc trang bÙ ½Ì ng°t x¨ ê trong tr−ng

thŸi l¡m viÎc tât. (iii) KiÌm tra ½Ì ½¨m bö r±ng cŸc thiÆt bÙ ch× bŸo v¡ ghi ê trong tr−ng thŸi l¡m viÎc tât v¡ cŸc vºt

tõ sø dòng cho thiÆt bÙ ghi ½¬ ½õìc trang bÙ ½ð trÅn t¡u. (iv) Thø chöc n¯ng bŸo ½æng Ÿnh sŸng hoć µm thanh ½õìc l°p cho hÎ thâng ghi v¡ kiÌm soŸt

viÎc x¨ d·u. (b) KiÌm tra ½Ì ½¨m bö r±ng thiÆt bÙ xŸc ½Ùnh ranh gièi d·u/ nõèc cÜ kiÌu ½õìc duyÎt ½¬ ½õìc c¶t giù

ê trÅn t¡u.

(4) HÎ thâng bçm, ½õéng âng v¡ thiÆt bÙ x¨ (a) KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng ½õéng âng x¨ ½Ì thï nõèc d±n b¸n hoć nõèc bÙ nhiÍm d·u l¡

thÞa m¬n. (b) Thø cŸc phõçng tiÎn liÅn l−c giùa vÙ trÏ quan sŸt v¡ vÙ trÏ ½iËu khiÌn x¨. (c) KiÌm tra hÎ thâng t¸y cń, cŸc k¾t l°ng, k¾t h¡ng hoć cŸc hÎ thâng ½Ì thŸo khá t¶t c¨ cŸc bçm

h¡ng v¡ t¶t c¨ cŸc ½õéng âng d·u bao gãm c¨ ½õéng âng nâi vèi phõçng tiÎn tiÆp nhºn ½Ì x¨ nõèc d±n b¸n hoć nõèc nhiÍm d·u.

(5) HÎ thâng k¾t d±n s−ch (a) KiÌm tra ½Ì ½¨m bö r±ng sú bâ trÏ k¾t d±n s−ch l¡ phï hìp. (b) KiÌm tra b±ng m°t k¾t d±n s−ch ½Ì ½¨m bö r±ng kháng cÜ d¶u hiÎu bÙ nhiÍm b¸n d·u.

(6) HÎ thâng d±n ½ć biÎt KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng d±n ½ć biÎt ê tr−ng thŸi l¡m viÎc tât.

(7) HÎ thâng phµn dÝng chÿ KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng phµn dÝng chÿ ê tr−ng thŸi l¡m viÎc tât.

3 Phï tiÆn h¡nh kiÌm tra cŸc h−ng mòc sau ½âi vèi thiÆt bÙ cða t¡u ½Ì ng¯n ng÷a á nhiÍm do cŸc ch¶t lÞng ½æc h−i chê xá gµy ra :

(1) HÎ thâng røa sç bæ (a) KiÌm tra trúc tiÆp ½Ì xŸc nhºn r±ng kiÌu, s¨n lõìng, sâ lõìng v¡ vÙ trÏ cða thiÆt bÙ røa l¡ nhõ ½¬

½õìc duyÎt. (b) KiÌm tra trúc tiÆp cŸc ½õéng âng røa k¾t v¡ thiÆt bÙ hµm nõèc røa.

(2) HÎ thâng t¸y cń KiÌm tra trúc tiÆp ½Ì xŸc nhºn r±ng kháng cÜ b¶t kü sú thay ½äi n¡o ½¬ ½õìc l¡m ½âi vèi hÎ thâng t¸y

cń.

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TCVN 6276 : 2003, Ph·n 2, Chõçng 3

(3) Lå x¨ dõèi ½õéng nõèc KiÌm tra trúc tiÆp vÙ trÏ cða lå x¨ dõèi ½õéng nõèc ½Æn möc cÜ thÌ thúc hiÎn ½õìc.

(4) ThiÆt bÙ ghi viÎc x¨ cń b¸n (a) KiÌm tra trúc tiÆp ½Ì xŸc nhºn thiÆt bÙ ½iËu khiÌn möc x¨ l¡ kiÌu ½¬ ½õìc duyÎt.

(b) KiÌm tra ½Ì ½¨m bö r±ng thiÆt bÙ ghi viÎc x¨ ê tr−ng thŸi l¡m viÎc tât.

(5) ThiÆt bÙ ½Ì x¨ v¡o phõçng tiÎn tiÆp nhºn KiÌm tra trúc tiÆp.

(6) HÎ thâng nõèc l¡m lo¬ng KiÌm tra trúc tiÆp.

(7) HÎ thâng hµm h¡ng KiÌm tra trúc tiÆp ½Æn möc cÜ thÌ ½õìc.

(8) HÎ thâng l¡m s−ch b±ng tháng giÜ Phï xŸc nhºn r±ng thiÆt bÙ tháng giÜ l¡ kiÌu ½¬ ½õìc duyÎt.

4 Phï xŸc nhºn r±ng KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u v¡/hoć KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra ½¬ ½õìc trang bÙ trÅn t¡u v¡ cŸc KÆ ho−ch n¡y tho¨ m¬n cŸc yÅu c·u cða Chõçng 5 v¡ 6.

3.2 KiÌm tra trung gian

3.2.1 Qui ½Ùnh chung

Khi kiÌm tra trung gian, phï tiÆn h¡nh kiÌm tra cŸc h−ng mòc tõçng öng theo ½iËu 3.2.2 cða Ph·n n¡y, v¡ c·n thiÆt, phï kiÌm tra tr−ng thŸi chung cða kÆt c¶u v¡ thiÆt bÙ liÅn quan.


1 Bä sung v¡o cáng viÎc kiÌm tra quy ½Ùnh ê ½iËu 3.1.2-1 Ph·n n¡y ½âi vèi thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u t÷ buãng mŸy cða t¶t c¨ cŸc t¡u, phï tiÆn h¡nh kiÌm tra theo cŸc h−ng mòc sau ½µy :

(1) KiÌm tra ½Ì ½¨m bö r±ng thiÆt bÙ phµn ly d·u - nõèc, hÎ thâng làc d·u, thiÆt bÙ xø lû v¡ dòng cò ½o h¡m lõìng d·u ê trong tr−ng thŸi l¡m viÎc tât. Tuy nhiÅn, viÎc xŸc nhºn chöc n¯ng cÜ thÌ thúc hiÎn b±ng thø gi¨ ½Ùnh theo tr−ng thŸi l¡m viÎc hoć b±ng phõçng phŸp tõçng ½õçng khŸc.

(2) Khi cÜ trang bÙ thiÆt bÙ phµn ly d·u - nõèc, hÎ thâng làc d·u, hoć thiÆt bÙ xø lû d·u, thÖ phï tiÆn h¡nh kiÌm tra cŸc trang thiÆt bÙ ½Ü bao gãm c¨ sú hao mÝn cða cŸc bçm, âng d¹n v¡ phò tïng cÜ liÅn quan.

(3) KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u bao gãm c¨ chöc n¯ng cða thiÆt bÙ ng÷ng x¨ tú ½æng hoć b±ng tay ê trong tr−ng thŸi l¡m viÎc tât. Tuy nhiÅn, viÎc xŸc nhºn chöc n¯ng cÜ thÌ thúc hiÎn b±ng thø gi¨ ½Ùnh theo tr−ng thŸi l¡m viÎc hoć b±ng cŸc phõçng phŸp tõçng ½õçng khŸc.

(4) Khi kiÌm tra vË cŸc khuyÆt tºt hoć hõ hÞng hoć sú câ cða thiÆt bÙ ½o h¡m lõìng d·u (bŸo hiÎu 15 ph·n triÎu v¡ thiÆt bÙ ghi v¡ kiÌm soŸt viÎc x¨ d·u ½âi vèi nõèc b¸n ½Ÿy t¡u), thÖ viÎc xŸc nhºn vË sú hiÎu ch×nh cða dòng cò ½o h¡m lõìng d·u phï ½õìc tiÆn h¡nh vèi sú cÜ m´t cða ‡¯ng kiÌm viÅn v¡ theo ½îng quy trÖnh cða nh¡ chÆ t−o hoć t¡i liÎu hõèng d¹n sø dòng, biÅn b¨n hiÎu ch×nh phï ½õìc kû nhºn.

2 Phï tiÆn h¡nh kiÌm tra theo cŸc h−ng mòc dõèi ½µy ½âi vèi cŸc thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u chê xá trÅn cŸc t¡u d·u, bä sung v¡o cŸc h−ng mòc kiÌm tra quy ½Ùnh ê 3.1.2-2 cða Ph·n n¡y :

(1) HÎ thâng røa b±ng d·u thá (a) KiÌm tra cŸc ½õéng âng røa b±ng d·u thá l°p ½´t bÅn ngo¡i cŸc k¾t d·u h¡ng, khi kÆt qu¨ kiÌm tra

cÜ nghi ngé vË tr−ng thŸi cða chîng, phï tiÆn h¡nh thø Ÿp lúc hoć ½o chiËu d¡y âng hoć l¡m c¨ hai. Phï chî û ½ć biÎt ½Æn cŸc ph−m vi cÜ cŸc ½õéng h¡n k¾p.

(b) KiÌm tra ½Ì ½¨m bö r±ng cŸc van ½Üng cða b·u hµm nõèc røa dïng hçi cða hÎ thâng røa b±ng nõèc ê trong tr−ng thŸi l¡m viÎc tât.

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(c) Phï ½¨m bö r±ng hiÎu qu¨ cða hÎ thâng røa b±ng d·u thá thÞa m¬n cŸc yÅu c·u ê 3.4 trong Ph·n 3 cða Qui ph−m n¡y. ‡ć biÎt, phï tiÆn h¡nh thø v¡ kiÌm tra theo cŸc h−ng mòc quy ½Ùnh trong b¨ng 2-2 tuü thuæc v¡o kiÌu t¡u v¡ cáng dòng cða k¾t.

B¨ng 2-2 Thø hiÎu qu¨ cða hÎ thâng røa b±ng d·u thá

KiÌu t¡u K¾t Thø v¡ kiÌm tra

1. ‡âi vèi t¡u tho¨ m¬n 3.2.4(1)(a) Ph·n 3

(1) K¾t d·u h¡ng ViÎc thø v¡ kiÌm tra yÅu c·u ½âi vèi cŸc k¾t quy ½Ùnh ê 1(1) trong b¨ng 2-1 phï ½õìc tiÆn h¡nh Ït nh¶t cho hai k¾t d·u h¡ng. Ho−t ½æng thø nghiÎm n¡y cÜ thÌ tiÆn h¡nh trong quŸ trÖnh røa b±ng d·u thá, røa b±ng nõèc hoć trÅn ½¡.

(1) K¾t d·u h¡ng i/ CŸc yÅu c·u tõçng tú nhõ quy ½Ùnh ê 1(1) trÅn

(2) K¾t d·u h¡ng/ d±n ban ½·u

(3) K¾t d·u h¡ng/ d±n sú câ

i/ CŸc yÅu c·u tõçng tú nhõ quy ½Ùnh ê 1(1) trÅn

ii/ XŸc nhºn vŸng d·u näi trÅn bË m´t cða nõèc d±n

Phï tiÆn h¡nh ½o täng lõìng d·u näi trÅn bË m´t nõèc d±n ban ½·u/d±n sú câ ½Ì xŸc nhºn r±ng tý sâ vË thÌ tÏch cða lõìng d·u trÅn to¡n bæ bË m´t nõèc d±n ban ½·u/d±n sú câ vèi thÌ tÏch cða k¾t cÜ chöa cŸc lo−i nõèc d±n ½Ü kháng võìt quŸ 0,00085. BiÎn phŸp ½o n¡y cÜ thÌ ch× phï tiÆn h¡nh ½âi vèi mæt k¾t trong nhÜm cŸc k¾t cÜ kÆt c¶u tõçng tú.

2. ‡âi vèi cŸc t¡u d·u kháng phï l¡ t¡u nÅu ê 1 trÅn

(4) K¾t d·u h¡ng/ d±n cuâi

i/ CŸc yÅu c·u tõçng tú nhõ quy ½Ùnh ê 1(1) trÅn

ii/ XŸc ½Ùnh h¡m lõìng d·u trong nõèc d±n

D±n cuâi phï ½õìc thï to¡n bæ tháng qua hÎ thâng ghi v¡ kiÌm soŸt d·u thï ½Ì xŸc ½Ùnh h¡m lõìng d·u cða nõèc thï ra kháng võìt quŸ 15ppm. BiÎn phŸp ½o n¡y cÜ thÌ ch× phï tiÆn h¡nh ½âi vèi mæt k¾t trong nhÜm cŸc k¾t cÜ kÆt c¶u tõçng tú.

(2) KiÌm tra thiÆt bÙ ghi v¡ kiÌm soŸt viÎc x¨ d·u v¡ hÎ thâng ½õéng âng cÜ liÅn quan : (a) Phï xŸc nhºn r±ng sú l°p ½´t hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u l¡ thÞa m¬n, v¡ l¡m viÎc tât kÌ

c¨ viÎc xŸc nhºn thiÆt bÙ ng°t x¨ tú ½æng v¡ b±ng tay, hÎ thâng khÜa khêi ½æng, théi gian trÍ cða dòng cò ½o h¡m lõìng d·u (trong kho¨ng 20 giµy) v¡ ½æ chÏnh xŸc cða lõu lõìng kÆ (trong kho¨ng ±15% lõu lõìng thúc tÆ ). Tuy nhiÅn, viÎc xŸc nhºn chöc n¯ng cÜ thÌ ½õìc thúc hiÎn b±ng thø gi¨ ½Ùnh theo tr−ng thŸi l¡m viÎc hoć b±ng cŸc phõçng phŸp tõçng ½õçng khŸc.

(b) KiÌm tra ½Ì th¶y ½õìc cŸc sai sÜt bË ngo¡i hoć sú hõ hÞng cða hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u v¡ dòng cò ½o h¡m lõìng d·u, v¡ viÎc hiÎu ch×nh dòng cò ½o h¡m lõìng d·u cÜ sú chöng kiÆn cða ‡¯ng kiÌm viÅn phï ½õìc tiÆn h¡nh phï hìp vèi t¡i liÎu hõèng d¹n sø dòng v¡ vºn h¡nh cða nh¡ chÆ t−o, cŸc biÅn b¨n hiÎu ch×nh phï ½õìc xŸc nhºn.

(3) KiÌm tra ½Ì xŸc nhºn chöc n¯ng cŸc van cða cŸc k¾t d·u h¡ng riÅng biÎt m¡ chîng ½õìc ½Üng kÏn khi t¡u ê trÅn biÌn, hoć cŸc phõçng tiÎn ½Üng kÏn tõçng tú khŸc khi chîng ½õìc thao tŸc b±ng tay hoć ½õìc ½iËu khiÌn t÷ xa.

(4) KiÌm tra ½Ì xŸc nhºn ho−t ½æng thÞa m¬n cða thiÆt bÙ xŸc ½Ùnh ranh gièi d·u/ nõèc.

3 Phï tiÆn h¡nh kiÌm tra theo cŸc h−ng mòc dõèi ½µy ½âi vèi thiÆt bÙ ng¯n ng÷a á nhiÍm do cŸc ch¶t lÞng ½æc h−i t÷ cŸc t¡u chê xá cŸc ch¶t lÞng ½æc gµy ra, bä sung v¡o cŸc h−ng mòc kiÌm tra qui ½Ùnh ê 3.1.2-3 Ph·n n¡y.

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(1) HÎ thâng røa sç bæ KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng røa sç bæ cÜ kh¨ n¯ng ho−t ½æng tât. Tuy nhiÅn, nÆu ½iËu n¡y kháng thÌ thúc hiÎn ½õìc, thÖ cÜ thÌ xŸc nhºn qua viÎc xem x¾t sä nhºt kû h¡ng.

(2) HÎ thâng t¸y cń KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng t¸y cń ê trong tr−ng thŸi l¡m viÎc tât, v¡ hÎ thâng l¡m viÎc cÜ hiÎu qu¨ cïng vèi sä nhºt kû h¡ng.

(3) KiÌm tra ½Ì ½¨m bö r±ng cŸc lå x¨ dõèi ½õéng nõèc l¡ phï hìp.

(4) ThiÆt bÙ ghi x¨ cń (a) KiÌm tra ½Ì ½¨m bö r±ng cŸc trang thiÆt bÙ x¨ cń v¡ thiÆt bÙ ½iËu khiÌn cõéng ½æ x¨ ê trong tr−ng

thŸi l¡m viÎc tât. KiÌm tra ½Ì xŸc nhºn sai sâ cða ½ãng hã ½o lõu lõìng n±m trong ph−m vi 15% lõu lõìng thúc tÆ.

(b) KiÌm tra ½Ì ½¨m bö r±ng thiÆt bÙ ghi x¨ ½¬ s³n s¡ng ½Ì sø dòng. Trong trõéng hìp n¡y, sú thø gi¨ ½Ùnh theo tr−ng thŸi l¡m viÎc cÜ thÌ ½õìc ch¶p thuºn.

(5) ThiÆt bÙ ½Ì x¨ v¡o phõçng tiÎn tiÆp nhºn KiÌm tra ½Ì ½¨m bö r±ng cŸc thiÆt bÙ ½Ì x¨ v¡o phõçng tiÎn tiÆp nhºn ho−t ½æng tât.

(6) HÎ thâng nõèc pha lo¬ng KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng nõèc pha lo¬ng ho−t ½æng tât.

(7) HÎ thâng hµm h¡ng KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng hµm h¡ng ho−t ½æng tât. Tuy nhiÅn, khi kháng thÌ thúc hiÎn ½õìc

½iËu n¡y, cÜ thÌ xŸc nhºn b±ng viÎc xem x¾t sä nhºt kû h¡ng.

(8) HÎ thâng l¡m s−ch b±ng tháng giÜ KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng l¡m s−ch b±ng tháng giÜ ho−t ½æng tât.

4 Phï xŸc nhºn r±ng KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u v¡/hoć KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra ½¬ ½õìc ½´t ê trÅn t¡u v¡ tho¨ m¬n cŸc quy ½Ùnh cða Chõçng 5 v¡ 6.

3.3 KiÌm tra ½Ùnh kü

3.3.1 Qui ½Ùnh chung

T−i måi ½ìt kiÌm tra ½Ùnh kü, tr−ng thŸi chung cða kÆt c¶u v¡ trang thiÆt bÙ liÅn quan phï ½õìc kiÌm tra cïng vèi cŸc h−ng mòc tõçng öng ½õìc nÅu ê 3.3.2 cða Ph·n n¡y.


1 Cáng viÎc kiÌm tra ½õìc nÅu ê 3.2.2-1 Ph·n n¡y phï ½õìc tiÆn h¡nh ½âi vèi cŸc trang thiÆt bÙ ½Ì ng¯n ng÷a á nhiÍm do d·u t÷ buãng mŸy cða t¶t c¨ cŸc t¡u gµy ra.

2 Cáng viÎc kiÌm tra sau ½µy phï ½õìc tiÆn h¡nh thÅm v¡o cŸc h−ng mòc kiÌm tra ½õìc nÅu ê 3.2.2-2 cða Ph·n n¡y ½âi vèi cŸc thiÆt bÙ ½Ì ng¯n ng÷a á nhiÍm do d·u chê xá trÅn cŸc t¡u d·u gµy ra.

(1) K¾t d±n cŸch ly (a) KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng cŸc bçm, ½õéng âng v¡ van tho¨ m¬n vèi cŸc qui ½Ùnh ½âi vèi

hÎ thâng cŸc k¾t d±n cŸch ly. (b) KiÌm tra vË sú hao mÝn cða bçm, cŸc âng v¡ van. (c) KiÌm tra ½Ì ½¨m bö kháng cÜ sú rÝ r× ê cŸc ½õéng âng d±n ½i qua cŸc k¾t d·u h¡ng v¡ ê cŸc

½õéng âng d·u h¡ng ½i qua cŸc k¾t d±n.

(2) HÎ thâng røa b±ng d·u thá (a) KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng røa b±ng d·u thá l¡ phï hìp vèi cŸc b¨n vÁ ½¬ duyÎt v¡ cŸc qui

½Ùnh 3.4 ê Ph·n 3 Qui ph−m. ‡ć biÎt phï xŸc nhºn cŸc h−ng mòc t÷ (i) ½Æn (iv) dõèi ½µy : (i) Mê kiÌm tra cŸc bçm. (ii) Thø Ÿp lúc hÎ thâng røa b±ng d·u thá ê Ÿp su¶t l¡m viÎc.

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TCVN 6276 : 2003, Ph·n 2, Chõçng 3

(iii) Phï ½¨m bö tháng qua kiÌm tra bÅn trong cŸc k¾t d·u h¡ng ½Ì xŸc nhºn r±ng thiÆt bÙ v¡ cŸc dòng cò trong cŸc k¾t d·u h¡ng l¡m viÎc tât.

(iv) Khi ½õìc trang bÙ van ng°t k¾p ½Ì ½Üng ho¡n to¡n cŸc ½õéng âng nâi vèi b·u hµm hçi nõèc dïng cho viÎc røa b±ng nõèc phï ½õìc mê ra ½Ì kiÌm tra.

(b) CŸc h−ng mòc ½õìc nÅu ê (1) (c).

(3) Giù d·u l−i trÅn t¡u KiÌm tra ½Ì ½¨m bö r±ng cŸc k¾t l°ng, cŸc k¾t d·u h¡ng ½õìc sø dòng l¡m k¾t l°ng v¡ hÎ thâng ½õéng âng phòc vò l¡ l¡m viÎc tât.

(4) HÎ thâng bçm, ½õéng âng v¡ thiÆt bÙ x¨ KiÌm tra ½Ì ½¨m bö r±ng hÎ thâng bçm, ½õéng âng v¡ thiÆt bÙ x¨ ½Ì x¨ nõèc d±n b¸n hoć nõèc bÙ l¹n d·u l¡ thÞa m¬n.

(5) HÎ thâng k¾t nõèc d±n s−ch CŸc h−ng mòc ½õìc nÅu ê (1)(c).

3 Phï tiÆn h¡nh kiÌm tra cŸc h−ng mòc sau ½µy ½âi vèi cŸc thiÆt bÙ ½Ì ng¯n ng÷a viÎc x¨ cŸc ch¶t lÞng ½æc t÷ cŸc t¡u chê xá cŸc ch¶t lÞng ½æc h−i, bä sung v¡o cŸc kiÌm tra ½õìc nÅu ê 3.2.2-3 cða Ph·n n¡y.

(1) HÎ thâng røa sç bæ KiÌm tra vË sú hao mÝn cða bçm phòc vò hÎ thâng røa, thiÆt bÙ røa v¡ hÎ thâng hµm nõèc røa.

(2) HÎ thâng t¸y cń (a) X¾t nghiÎm nõèc ½Ì xŸc nhºn lõìng cń t¸y phï ½õìc tiÆn h¡nh trÅn hÎ thâng t¸y røa v¡ cŸc bçm

cÜ liÅn quan b±ng viÎc l¶y m¹u ê Ït nh¶t hai k¾t d·u h¡ng, cŸc ph¾p thø tõçng tú cÜ thÌ tiÆn h¡nh ê cŸc k¾t d·u h¡ng khŸc khi th¶y c·n thiÆt.

(b) KiÌm tra sú hao mÝn cða cŸc bçm v¡ thiÆt bÙ ½õéng âng cÜ liÅn quan.

(3) Lå x¨ dõèi ½õéng nõèc KiÌm tra sú hao mÝn cða lå x¨ ê dõèi ½õéng nõèc (bao gãm cŸc bçm, thiÆt bÙ ½õéng âng v¡ cŸc van x¨ cÜ liÅn quan).

(4) ThiÆt bÙ ghi x¨ cń (a) KiÌm tra vË sú hao mÝn cða cŸc bçm v¡ hÎ thâng ½iËu khiÌn cÜ liÅn quan (khi ½õìc trang bÙ ê phÏa

x¨). (b) KiÌm tra ½Ì xŸc nhºn r±ng ½æ chÏnh xŸc cða lõu lõìng kÆ l¡ ±15% hoć chÏnh xŸc hçn.

(5) HÎ thâng x¨ v¡o phõçng tiÎn tiÆp nhºn KiÌm tra vË sú hao mÝn cða cŸc hÎ thâng bçm v¡ ½õéng âng.

(6) HÎ thâng nõèc l¡m lo¬ng KiÌm tra ½Ì xŸc nhºn sú hao mÝn cða cŸc hÎ thâng bçm v¡ ½õéng âng.

(7) HÎ thâng hµm h¡ng KiÌm tra ½Ì xŸc nhºn sú hao mÝn cða hÎ thâng hµm v¡ thiÆt bÙ ½õéng âng.

(8) HÎ thâng l¡m s−ch b±ng tháng giÜ KiÌm tra ½Ì xŸc nhºn sú hao mÝn cða thiÆt bÙ tháng giÜ v¡ hÎ thâng ½õéng âng.

4 ThiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï cða t¡u phï ½õìc tiÆn h¡nh kiÌm tra theo cŸc h−ng mòc sau ½µy:

(1) ‡¨m bö r±ng thiÆt bÙ ½¬ ½õìc trang bÙ phï hìp vèi b¨n vÁ ½¬ ½õìc duyÎt

(2) ‡¨m bö r±ng ½õéng âng thï v¡ bÏch nâi tiÅu chu¸n qui ½Ùnh ê 2.2.1 Ph·n 7 Qui ph−m ½¬ ½õìc trang bÙ phï hìp vèi b¨n vÁ ½¬ ½õìc duyÎt.

(3) ‡¨m bö r±ng thiÆt bÙ nÅu ê (1) v¡ cŸc bçm liÅn quan nÅu tèi (2) ê trong tr−ng thŸi l¡m viÎc tât.

(4) KiÌm tra ½æ hao mÝn cða cŸc bçm v¡ hÎ thâng ½õéng âng liÅn quan.

5 Phï xŸc nhºn r±ng KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u v¡/hoć KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra ½¬ ½õìc trang bÙ ê trÅn t¡u v¡ tho¨ m¬n cŸc quy ½Ùnh cða Chõçng 5 v¡ Chõçng 6.

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TCVN 6276 : 2003, Ph·n 3, Chõçng 2

chõçng 4 kiÌm tra b¶t thõéng


CŸc qui ½Ùnh trong Chõçng n¡y Ÿp dòng khi hoŸn cï, søa chùa hoć thay ½äi ½âi vèi cŸc thiÆt bÙ ½Ì ng¯n ng÷a á nhiÍm trÅn t¡u hoć KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u v¡/hoć KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do ch¶t lÞng ½æc h−i gµy ra ½õìc søa ½äi.

4.1.2 KiÌm tra KiÌm tra b¶t thõéng ½õìc tiÆn h¡nh ê mæt möc ½æ n¡o ½Ü so vèi cŸc quy ½Ùnh cða kiÌm tra ½Ùnh kü, phï hìp

vèi cáng viÎc søa chùa hoć thay ½äi cŸc trang thiÆt bÙ ng¯n ng÷a á nhiÍm.

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TCVN 6276 : 2003, Ph·n 3, Chõçng 1

Ph·n 3 kÆt c¶u v¡ trang thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u

Chõçng 1 qui ½Ùnh chung


1 CŸc qui ½Ùnh trong Ph·n n¡y Ÿp dòng ½âi vèi kÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u t÷ t¡u gµy ra.

2 ‡âi vèi cŸc t¡u d·u ½õìc thiÆt kÆ cÜ kÆt c¶u dïng ½Ì chê xá h¡ng lÞng trong mæt ph·n cŸc k¾t d·u h¡ng, thÖ cŸc qui ½Ùnh tõçng öng Ÿp dòng cho t¡u d·u nÅu ê 1.1.3, 2.3.2, 3.2.1(4)(b), 3.3.1-1, t÷ 3.3.1-3 ½Æn 3.3.1-8 v¡ t÷ 3.3.2-1 ½Æn 3.3.2-4 cða Ph·n n¡y ½õìc Ÿp dòng cho kÆt c¶u cða cŸc khoang h¡ng nhõ vºy. Tuy nhiÅn, khi täng thÌ tÏch cða cŸc khoang h¡ng nhÞ hçn 1000 m3, thÖ qui ½Ùnh 3.3.1-2 cÜ thÌ ½õìc Ÿp dòng thay cho cŸc qui ½Ùnh 3.3.1-1 v¡ t÷ 3.3.1-3 ½Æn 3.3.1-8.

3 CŸc d¡n khoan ngo¡i khçi v¡ cŸc s¡n näi khŸc dïng ½Ì khai thŸc t¡i nguyÅn khoŸng s¨n dõèi biÌn phï thÞa m¬n cŸc qui ½Ùnh Ÿp dòng cho t¡u cÜ täng dung tÏch t÷ 400 trê lÅn kháng phï l¡ t¡u d·u.

4 ‡âi vèi t¶t c¨ cŸc t¡u cŸnh ng·m, t¡u ½Îm kháng khÏ, v¡ cŸc t¡u kiÌu mèi khŸc (cŸc t¡u lõèt trÅn m´t biÌn v¡ cŸc t¡u ch−y dõèi m´t biÌn, v.v...), viÎc Ÿp dòng cŸc qui ½Ùnh ê Chõçng 2 v¡ Chõçng 3 liÅn quan tèi kÆt c¶u v¡ thiÆt bÙ m¡ x¾t th¶y kháng hìp lû hoć kháng kh¨ thi, kháng phï Ÿp dòng. Tuy nhiÅn, sú gi¨m nhÂ n¡y ch× Ÿp dòng vèi ½iËu kiÎn cÜ sú bâ trÏ tõçng ½õçng ½õìc t−o ra ê kÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm cða cŸc t¡u ½Ü cÜ x¾t ½Æn mòc ½Ïch khai thŸc.

5 B¶t kÌ cŸc ½iËu t÷ -1 ½Æn -4 trÅn, cŸc t¡u kháng ch−y tuyÆn quâc tÆ sÁ ½õìc ‡¯ng kiÌm xem x¾t giï quyÆt thÞa ½Ÿng.

1.1.2 Thuºt ngù

Trong Ph·n n¡y cða Qui ph−m sø dòng cŸc thuºt ngù ½õìc ½Ùnh nghØa sau ½µy :

(1) "Nõèc d±n s−ch" - Nõèc d±n trong k¾t m¡ trõèc ½Ü ½¬ chöa d·u, k¾t n¡y ½¬ ½õìc l¡m s−ch ½Æn möc trong ½iËu kiÎn t¡u ½öng yÅn, théi tiÆt sŸng sða, nõèc ngo¡i m−n yÅn lńg m¡ viÎc thï nõèc d±n n¡y kháng t−o nÅn cŸc vÎt d·u cÜ thÌ nhÖn th¶y ½õìc trÅn bË m´t nõèc biÌn hoć ê sŸt bé, hoć t−o nÅn cń d·u hoć nhñ tõçng l°ng xuâng dõèi m´t nõèc hoć sŸt bé. NÆu nõèc d±n ½õìc thï qua hÎ thâng ghi v¡ kiÌm soŸt d·u thï ½õìc ChÏnh quyËn ch¶p nhºn, m¡ h¡m lõìng d·u cða nõèc thï ra kháng quŸ 15 ph·n triÎu thÖ coi ½Ü l¡ nõèc d±n s−ch, mć dï khi thï cÜ kh¨ n¯ng t−o nÅn vÆt d·u nhÖn th¶y ½õìc.

(2) "Vïng ½ć biÎt" - Vïng biÌn m¡ ê ½Ü vÖ nhùng lû do kþ thuºt xŸc ½Ÿng vË ½iËu kiÎn hï dõçng hàc v¡ sinh thŸi v¡ ½ć ½iÌm giao tháng m¡ c·n dïng cŸc phõçng phŸp ½ć biÎt b°t buæc ½Ì ng¯n ng÷a á nhiÍm biÌn do d·u. Vïng ½ć biÎt ½¬ ½õìc ½Ùnh rß trong Qui ½Ùnh 10 cða Phò lòc I MARPOL 73/78.

(3) "Cõéng ½æ thï d·u töc théi" - Cõéng ½æ thï d·u tÏnh b±ng lÏt trong mæt gié ê b¶t kü théi ½iÌm n¡o chia cho tâc ½æ t¡u tÏnh b±ng hï lû t−i théi ½iÌm ½Ü.

(4) "K¾t" - Mæt kháng gian kÏn ½õìc t−o nÅn bêi cŸc ph·n tø câ ½Ùnh cða kÆt c¶u thµn t¡u v¡ ½õìc thiÆt kÆ ½Ì chê xá h¡ng lÞng.

(5) "K¾t m−n" - K¾t b¶t kü tiÆp giŸp vèi tán m−n cða t¡u.

(6) "K¾t trung tµm" - K¾t b¶t kü n±m giùa cŸc vŸch dàc.

(7) "K¾t l°ng" - Mæt k¾t riÅng biÎt ½õìc thiÆt kÆ ½Ì gom nõèc thï, nõèc røa v¡ cŸc hån hìp cÜ l¹n d·u khŸc.

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TCVN 6276 : 2003, Ph·n 3, Chõçng 2

1.1.3 Quy ½Ùnh h−n chÆ ½âi vèi k¾t d·u

1 ‡âi vèi cŸc t¡u cÜ täng dung tÏch t÷ 400 trê lÅn, kháng ½õìc bâ trÏ k¾t d·u trong khoang mñi hoć trõèc vŸch châng va.

2 ‡âi vèi cŸc t¡u cÜ täng dung tÏch t÷ 4000 trê lÅn kháng phï l¡ t¡u d·u v¡ cŸc t¡u d·u cÜ täng dung tÏch t÷ 150 trê lÅn, ½õéng âng d·u ½ât bao gãm c¨ cŸc k¾t d·u ½ât phï ½õìc tŸch biÎt khÞi ½õéng âng nõèc d±n. Tuy nhiÅn, t¡u phï chöa nõèc d±n trong cŸc k¾t d·u ½ât rång ½Ì duy trÖ än ½Ùnh v¡ an to¡n cÜ thÌ ½õìc miÍn gi¨m yÅu c·u n¡y.

3 CŸc t¡u kháng phï l¡ t¡u ½õìc nÅu ê -1 v¡ -2 trÅn phï thÞa m¬n cŸc yÅu c·u ê -1 v¡ -2 trÅn ½Æn möc hìp lû v¡ cÜ thÌ thúc hiÎn ½õìc.

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TCVN 6276 : 2003, Ph·n 3, Chõçng 4

Chõçng 2 trang thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u t÷ buãng mŸy


CŸc qui ½Ùnh trong Chõçng n¡y Ÿp dòng cho kÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u hoć hån hìp d·u t÷ buãng mŸy cða t¶t c¨ cŸc t¡u gµy ra.

2.2 Chöa v¡ x¨ cń d·u 2.2.1 Dung tÏch k¾t d·u cń

1 CŸc t¡u cÜ täng dung tÏch t÷ 400 trê lÅn phï ½õìc trang bÙ mæt hoć nhiËu k¾t cÜ dung tÏch thÏch hìp ½Ì chöa ch¶t cń b¸n do l¡m s−ch d·u nhiÅn liÎu v¡ d·u bái trçn, v¡ d·u bÙ rÝ trong buãng mŸy. Dung tÏch cða mæt hoć cŸc k¾t ½Ü phï lèn hçn täng dung tÏch nhÞ nh¶t cða cŸc k¾t riÅng biÎt ½õìc nÅu ê (1) v¡ (2) dõèi ½µy.

(1) Dung tÏch nhÞ nh¶t cða mæt k¾t ½Ì chöa cń b¸n do l¡m s−ch d·u nhiÅn liÎu v¡ d·u bái trçn phï l¡ V1 hoć V2 nÅu ê (a) ½Æn (c) sau ½µy : (a) Dung tÏch nhÞ nh¶t V1 cða k¾t ê cŸc t¡u kháng chöa nõèc d±n trong cŸc k¾t d·u nhiÅn liÎu, m¡ t¡u

n¡y cÜ sâng chÏnh ½õìc ½´t trõèc ng¡y 30.12.1990, hoć t¡u ê giai ½o−n ½Üng tõçng tú :

V1 = K1 C D (m3) Trong ½Ü:

K1 = 0,01 : ‡âi vèi d·u nhiÅn liÎu nńg c·n phï ½õìc l¡m s−ch trõèc khi c¶p v¡o mŸy chÏnh ½Ì sø dòng.

K1 = 0,005: ‡âi vèi d·u ½i-Å-den hoć d·u nhiÅn liÎu nńg kháng c·n phï l¡m s−ch. C : Lõìng d·u nhiÅn liÎu tiÅu thò trong mæt ng¡y ½Åm (t¶n/ng¡y ½Åm) D : Sâ ng¡y h¡nh trÖnh lµu nh¶t giùa cŸc c¨ng m¡ ê ½Ü d·u cń cÜ thÌ ½õìc x¨ lÅn

bé (khi kháng cÜ sâ liÎu chi tiÆt, l¶y lèn hçn 30 ng¡y ½Åm). Tuy nhiÅn, khi t¡u ½õìc trang bÙ thiÆt bÙ ½ãng thÌ hÜa, thiÆt bÙ ½ât cń hoć thiÆt bÙ lo−i bÞ cń

½õìc ‡¯ng kiÌm ch¶p nhºn, cÜ thÌ sø dòng cŸc giŸ trÙ sau ½µy : V1 = 1(m3): ‡âi vèi t¡u cÜ täng dung tÏch t÷ 400 trê lÅn nhõng nhÞ hçn 4000. V1 = 2(m3): ‡âi vèi nhùng t¡u cÜ täng dung tÏch t÷ 4000 trê lÅn.

(b) Dung tÏch nhÞ nh¶t V1 cða k¾t ê cŸc t¡u kháng chöa nõèc d±n trong cŸc k¾t d·u nhiÅn liÎu, m¡ t¡u n¡y cÜ sâng chÏnh ½õìc ½´t sau ng¡y 31.12.1990, hoć t¡u ê giai ½o−n ½Üng tõçng tú :

V1 = K1 C D (m3) Trong ½Ü :

K1 = 0,015: ‡âi vèi d·u nhiÅn liÎu nńg c·n phï l¡m s−ch trõèc khi c¶p v¡o mŸy chÏnh ½Ì sø dòng.

K1 = 0,005: ‡âi vèi d·u ½i-Å-den hoć d·u nhiÅn nhiÎu nńg kháng c·n l¡m s−ch. C : Lõìng d·u nhiÅn liÎu tiÅu thò trong mæt ng¡y ½Åm (m3/ ng¡y ½Åm) D : Sâ ng¡y h¡nh trÖnh lµu nh¶t giùa cŸc c¨ng m¡ ê ½Ü d·u cń cÜ thÌ ½õìc x¨ lÅn

bé (khi kháng cÜ sâ liÎu chi tiÆt, l¶y lèn hçn 30 ng¡y ½Åm). Tuy nhiÅn, khi t¡u ½õìc trang bÙ thiÆt bÙ l¡m ½ãng thÌ hÜa, thiÆt bÙ ½ât cń hoć thiÆt bÙ lo−i bÞ cń ½õìc ‡¯ng kiÌm ch¶p nhºn, cÜ thÌ sø dòng cŸc giŸ trÙ sau ½µy :

V1 = 0,5 K1 C D (m3)

Hoć : V1 = 1(m3) : ‡âi vèi t¡u cÜ täng dung tÏch t÷ 400 trê lÅn nhõng nhÞ hçn 4000. V1 = 2 (m3) : ‡âi vèi nhùng t¡u cÜ täng dung tÏch t÷ 4000 trê lÅn.

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L¶y giŸ trÙ n¡o lèn hçn. (c) Dung tÏch nhÞ nh¶t V2 cða k¾t ê t¡u cÜ chöa nõèc d±n trong cŸc k¾t d·u nhiÅn liÎu :

V2 = V1 + K2.B (m3) Trong ½Ü :

V1 : Dung tÏch k¾t ½õìc xŸc ½Ùnh hoć theo ½iËu (a) hoć theo ½iËu (b) nÅu trÅn. K2 = 0,01 : Khi nõèc d±n ½õìc chöa trong cŸc k¾t d·u nhiÅn liÎu nńg. K2 = 0,005: Khi nõèc d±n ½õìc chöa trong cŸc k¾t d·u ½i-Å-zen.

B : Dung tÏch cða k¾t d·u nhiÅn liÎu (t¶n) ½õìc nâi vèi cŸc ½õéng âng nõèc d±n.

(2) Dung tÏch nhÞ nh¶t cða k¾t chöa d·u b¸n do d·u bÙ rÝ r× trong buãng mŸy phï l¡ V3 nhõ ½õìc nÅu dõèi ½µy. Tuy nhiÅn, cŸc t¡u cÜ sâng chÏnh ½õìc ½´t trõèc ng¡y 31.12.1991, hoć cŸc t¡u ê giai ½o−n ½Üng tõçng tú cÜ thÌ ½õìc miÍn gi¨m cŸc yÅu c·u n¡y :

V3 = VE + VL

Trong ½Ü : VE : Dung tÏch k¾t chöa d·u thï (m3) VL : Dung tÏch k¾t chöa d·u rÝ r× (m3)

VE, VL ½õìc xŸc ½Ùnh theo tÏnh toŸn sau ½µy :

(a) VE = 1,5 n1 (m3)

Trong ½Ü : n1 : L¡ giŸ trÙ cÜ ½õìc nhõ sau : n1 = 1

Khi täng cáng su¶t liÅn tòc lèn nh¶t cða mŸy chÏnh v¡ cŸc mŸy phò b±ng hoć nhÞ hçn 1000 kW.

n1 = P/1000 Khi täng cáng su¶t liÅn tòc cða mŸy chÏnh v¡ cŸc mŸy phò lèn hçn 1000kW

Tuy nhiÅn, cÜ thÌ ch¶p nhºn VE = 0 khi ½õìc trang bÙ mŸy làc d·u bái trçn v¡ kháng thay d·u bái trçn trong khi t¡u ½ang ê trÅn biÌn.

(b) VL = D × 20 × P/106 (m3) Khi P ≤ 10.000 (kW)

VL = D × (0,2 + 7 × (P - 10.000)/106) (m3) Khi P > 10.000 (kW)

Trong ½Ü : P : Cáng su¶t liÅn tòc lèn nh¶t cða mŸy chÏnh (kW) D : Théi gian h¡nh trÖnh lµu nh¶t giùa cŸc c¨ng cho ½Æn khi cÜ thÌ x¨ ½õìc d·u b¸n lÅn

bé (khi kháng cÜ cŸc sâ liÎu chi tiÆt, l¶y b±ng 30 ng¡y ½Åm hoć lèn hçn).

2 B¶t kÌ cŸc yÅu c·u nÅu ê -1 trÅn, ê cŸc t¡u ½õìc liÎt kÅ dõèi ½µy m¡ trÅn cŸc t¡u ½Ü to¡n bæ nõèc ½Ÿy t¡u nhiÍm d·u ch× ½õìc lõu giù ½Ì x¨ v¡o phõçng tiÎn tiÆp nhºn, thÖ cŸc k¾t d·u cń cÜ thÌ ½õìc thay b±ng hÎ thâng lõu giù nõèc ½Ÿy t¡u.

(1) CŸc t¡u ho−t ½æng trong vïng biÌn ½ć biÎt.

(2) CŸc t¡u ho−t ½æng ê vïng biÌn trong kho¨ng 20 hï lû tÏnh t÷ ½õéng cç sê .

(3) CŸc t¡u kháng cÜ mŸy chÏnh ½õìc ‡¯ng kiÌm ch¶p nhºn. 2.2.2 KÆt c¶u k¾t d·u cń v¡ hÎ thâng ½õéng âng

1 KÆt c¶u v¡ hÎ thâng ½õéng âng cða cŸc k¾t d·u cń theo qui ½Ùnh nÅu ê 2.2.1 nÜi trÅn phï thÞa m¬n cŸc yÅu c·u (1) ½Æn (3) sau ½µy :

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(1) CŸc lå kho¾t dïng cho ngõéi chui hoć cŸc lå ½Ì l¡m vÎ sinh cÜ kÏch thõèc thÏch hìp phï ½õìc bâ trÏ t−i cŸc vÙ trÏ sao cho t÷ng ph·n cða k¾t cÜ thÌ ½õìc l¡m s−ch kháng khÜ kh¯n.

(2) Phï trang bÙ cŸc phõçng tiÎn thÏch hìp ½Ì dÍ d¡ng hît v¡ x¨ cń d·u.

(3) Tr÷ bÏch nâi x¨ tiÅu chu¸n ½õìc nÅu ê 2.2.3 cða Ph·n n¡y, kháng ½õìc l°p ½´t cŸc bÏch nâi x¨ trúc tiÆp qua m−n t¡u.

2 CŸc t¡u cÜ sâng chÏnh ½õìc ½´t sau ng¡y 31.12.1990, hoć ê giai ½o−n ½Üng tõçng tú phï thÞa m¬n cŸc yÅu c·u sau ½µy, bä sung thÅm v¡o ½iÌm -1 nÅu trÅn :

(1) ‡õéng âng x¨ cða k¾t v¡ ½õéng âng nõèc ½Ÿy t¡u phï kháng ½õìc nâi vèi nhau, tr÷ cŸc trõéng hìp dõèi ½µy : (a) ‡o−n âng chung ½õìc trang bÙ bÏch nâi tiÅu chu¸n nÅu ê 2.2.3. (b) ‡õéng âng ½Ì x¨ nõèc ½¬ ½õìc l¡m l°ng ra khÞi k¾t. Tuy nhiÅn, ½iËu n¡y ½õìc gièi h−n cho cŸc

trõéng hìp m¡ viÎc x¨ ½õìc thúc hiÎn nhé van tú ½Üng ½õìc thao tŸc b±ng tay hoć cŸc thiÆt bÙ ½Üng kÏn tõçng ½õçng.

(2) Phï trang bÙ cŸc bçm thÞa m¬n cŸc yÅu c·u sau ½µy ½Ì x¨ cń d·u ra khÞi k¾t : (a) Kháng dïng chung vèi bçm nõèc ½Ÿy t¡u nhiÍm d·u. (b) Bçm phï l¡ kiÌu phï hìp ½Ì x¨ cń lÅn bé. (c) Täng cæt Ÿp phï l¡ 40 m hoć lèn hçn. (d) S¨n lõìng cða bçm l¡ Q1 hoć Q2 sau ½µy, l¶y s¨n lõìng n¡o lèn hçn. Tuy nhiÅn, cŸc t¡u cÜ sâng

chÏnh ½´t trõèc ng¡y 31.12.1991, hoć ê giai ½o−n ½Üng tõçng tú cÜ thÌ ½õìc miÍn yÅu c·u n¡y. Ngo¡i ra, ê cŸc t¡u kháng ch−y tuyÆn quâc tÆ, s¨n lõìng bçm cÜ thÌ l¶y b±ng 0,5 (m3/h) :

Q1 = Vt

(m3/h)

Hoć Q2 = 2,0 (m3/h)

Trong ½Ü : V : L¡ V1 hoć V2 ½õìc nÅu ê 2.2.1-1(1) cða Ph·n n¡y. t = 4 gié

(e) Cæt Ÿp hît thúc tÆ cða bçm phï thÞa m¬n cŸc yÅu c·u sau :

3,0 m : P ≤ 15.000 (kW) 3,5 m : P > 15.000 (kW)

Trong ½Ü : P : Cáng su¶t liÅn tòc lèn nh¶t cða mŸy chÏnh.

2.2.3 BÏch nâi x¨ tiÅu chu¸n

‡Ì ½õéng âng cða phõçng tiÎn tiÆp nhºn nâi ½õìc vèi ½õéng âng x¨ cða k¾t d·u cń ½õìc l°p ½´t theo cŸc yÅu c·u ê 2.2.2 trÅn, phï trang bÙ mæt bÏch nâi tiÅu chu¸n phï hìp vèi B¨ng 3-1.

2.3 ThiÆt bÙ phµn ly d·u - nõèc, hÎ thâng làc d·u, hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u dïng cho nõèc

½Ÿy t¡u, v¡ cŸc k¾t giù nõèc ½Ÿy t¡u 2.3.1 ThiÆt bÙ phµn ly d·u - nõèc

ThiÆt bÙ phµn ly d·u - nõèc phï cÜ thiÆt kÆ ½õìc ‡¯ng kiÌm duyÎt v¡ phï bö ½¨m sao cho b¶t kü hån hìp d·u nõèc n¡o sau khi qua thiÆt bÙ phµn ly d·u - nõèc cÜ h¡m lõìng d·u kháng quŸ 100 ph·n triÎu.

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TCVN 6276 : 2003, Ph·n 3, Chõçng 2

B¨ng 3-1 KÏch thõèc tiÅu chu¸n cða m´t bÏch nâi x¨

CŸc chi tiÆt Qui ½Ùnh

‡õéng kÏnh ngo¡i 215 mi li m¾t

‡õéng kÏnh trong ‡õéng kÏnh tõçng öng mæt cŸch hìp lû vèi ½õéng kÏnh ngo¡i

‡õéng kÏnh vÝng trÝn l¯n 183 mi li m¾t

R¬nh khÏa (lå b°t bu láng) trÅn m´t bÏch nâi Phï khoan 6 lå ½õéng kÏnh 22 mi li m¾t ê trÅn ½õéng kÏnh vÝng trÝn l¯n t−i cŸc kho¨ng cŸch gÜc b±ng nhau, v¡ phï gia cáng cŸc r¬nh ræng 22 mi li m¾t t÷ cŸc lå n¡y th¶u tèi v¡nh ngo¡i cða bÏch nâi

ChiËu d¡y cða bÏch nâi 20 mi li m¾t

Sâ lõìng v¡ ½õéng kÏnh cða cŸc bu láng v¡ ½ai âc vèi chiËu d¡y thÏch hìp

6 bæ ½õéng kÏnh 20 mi lim¾t

BÏch nâi phï l¡m b±ng th¾p hoć vºt liÎu tõçng ½õçng vèi cŸc bË m´t nh³n. BÏch nâi phï chÙu ½õìc Ÿp su¶t l¡m viÎc 0,6 MPa khi mæt miÆng ½Îm kÏn d·u ½õìc lãng v¡o.

22 m

m

215

mm

183 mm

20mm

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TCVN 6276 : 2003, Ph·n 3, Chõçng 4

2.3.2 HÎ thâng làc d·u

HÎ thâng làc d·u phï thÞa m¬n hoć cŸc yÅu c·u ê (1), (2) hoć (3) sau ½µy tïy theo kiÌu v¡ kÏch thõèc cða t¡u v¡ vïng khai thŸc :

(1) Phï cÜ thiÆt kÆ ½õìc ‡¯ng kiÌm duyÎt v¡ phï bö ½¨m sao cho b¶t kü hån hìp d·u nõèc n¡o sau khi qua hÎ thâng làc phï cÜ h¡m lõìng d·u kháng quŸ 15 ph·n triÎu.

(2) HÎ thâng làc phï thÞa m¬n cŸc yÅu c·u ê (1) v¡ phï ½õìc l°p ½´t mæt thiÆt bÙ bŸo hiÎu Ÿnh sŸng v¡ µm thanh cÜ kiÌu ½¬ ½õìc duyÎt, tú ho−t ½æng khi h¡m lõìng d·u trong nõèc thï ra võìt quŸ 15 ph·n triÎu, v¡ cñng tú ho−t ½æng khi chöc n¯ng ½o ½−c bÙ sai sÜt hoć hõ hÞng.

(3) HÎ thâng làc phï thÞa m¬n cŸc yÅu c·u ê (2) v¡ ½õìc trang bÙ mæt thiÆt bÙ ng÷ng x¨ tú ½æng sao cho sÁ ½¨m bö tú ½æng d÷ng hÎ thâng khi h¡m lõìng d·u trong nõèc thï võìt quŸ 15 ph·n triÎu.

2.3.3 HÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u dïng cho nõèc ½Ÿy t¡u

HÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u phï l¡ kiÌu ½õìc ‡¯ng kiÌm duyÎt v¡ phï cÜ chöc n¯ng sau :

(1) Phï cÜ thiÆt bÙ cÜ kh¨ n¯ng ghi liÅn tòc h¡m lõìng d·u tÏnh b±ng ph·n triÎu.

(2) Chöc n¯ng ghi ½õìc nÜi ½Æn ê (1) trÅn phï bao gãm c¨ théi gian v¡ ng¡y, thŸng.

(3) CŸc chöc n¯ng trÅn phï ho−t ½æng ½ãng théi vèi sú b°t ½·u x¨ cða dÝng thï ra biÌn.

(4) Khi h¡m lõìng d·u cða dÝng nõèc thï ra võìt quŸ 100 ph·n triÎu, hoć khi cÜ sai sÜt hoć hõ hÞng cða bæ phºn ½o ½−c, thÖ tÏn hiÎu bŸo ½æng b±ng Ÿnh sŸng v¡ µm thanh phï phŸt ra cïng vèi viÎc tú ½æng ng÷ng x¨ hån hìp d·u.

2.3.4 K¾t giù nõèc ½Ÿy t¡u

K¾t giù nõèc ½Ÿy t¡u phï thÞa m¬n cŸc yÅu c·u sau :

(1) Dung tÏch k¾t giù nõèc b¸n ½Ÿy t¡u (C(m3)) phï l¡ giŸ trÙ thu ½õìc t÷ cáng thöc dõèi ½µy hoć lèn hçn.

(a) CŸc t¡u cÜ cáng su¶t liÅn tòc lèn nh¶t cða mŸy chÏnh dõèi 1000 kW C = 1,5 (m3)

(b) CŸc t¡u cÜ cáng su¶t liÅn tòc lèn nh¶t cða mŸy chÏnh t÷ 1000 kW ½Æn 20.000 kW

C = 1,5 + (P - 1000)/1500 (m3)

Trong ½Ü : P : Cáng su¶t liÅn tòc lèn nh¶t cða mŸy chÏnh (kW)

(c) CŸc t¡u cÜ cáng su¶t liÅn tòc lèn nh¶t cða mŸy chÏnh t÷ 20.000 kW trê lÅn

C = 14,2 + 0,2 (P - 20.000)/1500 (m3) Trong ½Ü :

P : Cáng su¶t liÅn tòc lèn nh¶t cða mŸy chÏnh (kW)

(2) CŸc k¾t giù nõèc ½Ÿy t¡u phï ½õìc trang bÙ mæt thiÆt bÙ cÜ kh¨ n¯ng ½o ½õìc lõìng nõèc b¸n ½Ÿy t¡u.

(3) K¾t phï ½¨m bö kháng bÙ rÝ nõèc ½Ÿy t¡u ngay c¨ khi t¡u chîi 10o v¡ l°c 22,5o måi bÅn.

(4) ViÎc bâ trÏ phï sao cho cÜ kh¨ n¯ng chuyÌn nõèc ½Ÿy t¡u v¡o c¨ k¾t giù nõèc b¸n ½Ÿy t¡u v¡ c¨ phõçng tiÎn tiÆp nhºn trÅn bé. Trong trõéng hìp n¡y, k¾t phï ½õìc trang bÙ mæt bÏch nâi x¨ tiÅu chu¸n ½õìc nÅu ê B¨ng 3-1 ½iËu 2.2.3.

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TCVN 6276 : 2003, Ph·n 3, Chõçng 2

2.4 YÅu c·u vË l°p ½´t 2.4.1 Qui ½Ùnh chung

1 ‡âi vèi t¶t c¨ cŸc t¡u d·u cÜ täng dung tÏch t÷ 150 trê lÅn v¡ cŸc t¡u khŸc kháng phï l¡ t¡u d·u cÜ täng dung tÏch t÷ 400 trê lÅn phï trang bÙ hÎ thâng làc d·u ½Ì xø lû nõèc ½Ÿy t¡u l¹n d·u t÷ buãng mŸy hoć cŸc d·u khŸc theo B¨ng 3-2-1.

2 B¶t kÌ cŸc yÅu c·u ê -1 trÅn, cŸc t¡u ½õìc b¡n giao trõèc ng¡y 6.7.1993 (kháng kÌ cŸc t¡u ch× ho−t ½æng trong vïng ½ć biÎt) phï trang bÙ hÎ thâng làc d·u phï hìp vèi B¨ng 3-2-1 ½Ì xø lû nõèc ½Ÿy t¡u l¹n d·u t÷ buãng mŸy hoć cŸc d·u khŸc cho ½Æn ng¡y 6.7.1998 vèi ½iËu kiÎn cŸc t¡u n¡y ½õìc trang bÙ cŸc hÎ thâng phï hìp vèi B¨ng 3-2-2.

B¨ng 3-2-1 Qui ½Ùnh l°p ½´t hÎ thâng làc d·u

Täng dung tÏch Vïng khai thŸc v¡ kiÌu t¡u

Dõèi 150 T÷ 150 ½Æn dõèi 400

T÷ 400 ½Æn dõèi 10000

10000 trê lÅn

T¡u ch× ho−t ½æng T¡u d·u ⎯ (II)

trong vïng ½ć biÎt T¡u kháng phï l¡ t¡u d·u ⎯ (I)* (II)

CŸc t¡u kháng phï T¡u d·u ⎯ (I) (II)

l¡ t¡u ½õìc nÅu ê trÅn T¡u kháng phï l¡ t¡u d·u ⎯ ⎯ (I) (II)

Chî thÏch : CŸc kû hiÎu trong b¨ng biÌu thÙ cŸc thiÆt bÙ sau ½µy : (I) : HÎ thâng làc d·u ½õìc nÅu ê 2.3.2 (1) (II) : HÎ thâng làc d·u ½õìc nÅu ê 2.3.2 (3) * : CŸc t¡u ch× ho−t ½æng trong vïng Nam cúc

B¨ng 3-2-2 Qui ½Ùnh l°p ½´t hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u v¡ thiÆt bÙ phµn ly d·u - nõèc

Täng dung tÏch

Vïng khai thŸc v¡ kiÌu t¡u Dõèi 150 T÷ 150 ½Æn

dõèi 400 T÷ 400 ½Æn dõèi 10000

10000 trê lÅn

T¡u ch× ho−t ½æng T¡u d·u ⎯ B D

trong vïng ½ć biÎt T¡u kháng phï l¡ t¡u d·u ⎯

CŸc t¡u kháng phï T¡u d·u C E

l¡ t¡u ½õìc nÜi ê trÅn T¡u kháng phï l¡ t¡u d·u ⎯ ⎯

Chî thÏch : CŸc kû hiÎu trong b¨ng biÌu thÙ cŸc thiÆt bÙ sau ½µy : B : HÎ thâng làc d·u ½õìc nÅu ê 2.3.2 (1) C : ThiÆt bÙ phµn ly d·u - nõèc ½õìc nÅu ê 2.3.1 hoć hÎ thâng làc d·u ½õìc nÅu ê 2.3.2 (1) D : HÎ thâng làc d·u ½õìc nÅu ê 2.3.2 (2) E : ThiÆt bÙ phµn ly d·u - nõèc ½õìc nÅu ê 2.3.1, hoć hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u nÅu ê 2.3.3,

hoć hÎ thâng làc d·u nÅu ê 2.3.2 (2).

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2.4.2 Søa ½äi

1 Tr÷ cŸc t¡u ch× ho−t ½æng trong vïng ½ć biÎt, cŸc t¡u cÜ täng dung tÏch t÷ 4000 trê lÅn kháng phï l¡ t¡u d·u v¡ cŸc t¡u d·u cÜ täng dung tÏch t÷ 150 trê lÅn m¡ cÜ chöa nõèc d±n trong cŸc k¾t d·u ½ât theo quy ½Ùnh 1.1.3-2 Ph·n n¡y Quy ph−m phï trang bÙ cŸc thiÆt bÙ ½õìc qui ½Ùnh ê cæt t¡u cÜ täng dung tÏch t÷ 10000 trê lÅn ½Ì x¨ nõèc d±n b¸n xuâng biÌn.

2 B¶t kÌ cŸc qui ½Ùnh nÅu ê 2.4.1 nÜi trÅn, ½âi vèi cŸc t¡u liÎt kÅ dõèi ½µy cÜ dú ½Ùnh cho x¨ to¡n bæ nõèc ½Ÿy t¡u l¹n d·u v¡o phõçng tiÎn tiÆp nhºn, thÖ thiÆt bÙ phµn ly d·u - nõèc, hÎ thâng làc d·u v¡ thiÆt bÙ ghi v¡ kiÌm soŸt viÎc x¨ d·u cÜ thÌ ½õìc thay thÆ b±ng hÎ thâng cŸc k¾t giù nõèc ½Ÿy t¡u.

(1) CŸc t¡u ch× ho−t ½æng trong cŸc vïng ½ć biÎt.

(2) CŸc t¡u cÜ täng dung tÏch dõèi 500 v¡ ch× ho−t ½æng trong ph−m vi 20 hï lû tÏnh t÷ ½õéng cç sê.

(3) CŸc t¡u ½õìc b¡n giao trõèc ng¡y 6.7.1993 cÜ täng dung tÏch kháng nhÞ hçn 500 v¡ ch× ho−t ½æng trong ph−m vi 20 hï lû tÏnh t÷ ½õéng cç sê. Trong trõéng hìp n¡y t¡u phï tuµn theo qui ½Ùnh 2.4.1-1 v¡o ng¡y 6.7.1998.

(4) CŸc t¡u kháng cÜ mŸy chÏnh, v¡ ½¬ ½õìc ‡¯ng kiÌm cho l¡ phï hìp.

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chõçng 3 kÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u chê xá gµy ra


1 CŸc qui ½Ùnh trong Chõçng n¡y Ÿp dòng cho kÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u ½õìc chê xá trÅn t¡u d·u gµy ra.

2 CŸc qui ½Ùnh cða 3.2.4 ½õìc Ÿp dòng cho cŸc t¡u d·u cÜ tràng tï to¡n ph·n t÷ 600 t¶n trê lÅn :

(1) ‡âi vèi cŸc t¡u cÜ hìp ½ãng ½Üng v¡o hoć sau ng¡y 6.7.1993, hoć

(2) Kháng cÜ hìp ½ãng ½Üng, nhõng sâng chÏnh cða t¡u ½õìc ½´t hoć t¡u ½ang ê giai ½o−n ½Üng tõçng tú v¡o hoć sau ng¡y 6.1.1994, hoć

(3) ViÎc b¡n giao t¡u v¡o hoć sau ng¡y 6.7.1996, hoć

(4) T¡u cÜ hoŸn cï lèn : (a) CÜ hìp ½ãng hoŸn cï sau ng¡y 6.7.1993, hoć (b) Kháng cÜ hìp ½ãng hoŸn cï nhõng cáng viÎc hoŸn cï ½¬ ½õìc b°t ½·u sau ng¡y 6.1.1994, hoć (c) Cáng viÎc hoŸn cï ½õìc ho¡n th¡nh sau ng¡y 6.7.1996.

3 CŸc qui ½Ùnh 3.2.2-6 v¡ -7 ½õìc Ÿp dòng cho cŸc t¡u d·u cÜ tràng tï to¡n ph·n t÷ 5000 t¶n trê lÅn:

(1) ‡âi vèi cŸc t¡u cÜ hìp ½ãng ½Üng v¡o hoć sau ng¡y 1.2.1999, hoć

(2) Kháng cÜ hìp ½ãng ½Üng, nhõng sâng chÏnh cða t¡u ½¬ ½õìc ½´t hoć t¡u ½ang ê giai ½o−n ½Üng tõçng tú v¡o hoć sau ng¡y 1.8.1999, hoć

(3) ViÎc b¡n giao t¡u v¡o hoć sau ng¡y 1.2.2002, hoć

(4) T¡u cÜ hoŸn cï lèn : (a) CÜ hìp ½ãng hoŸn cï sau 1.2.1999, hoć (b) Kháng cÜ hìp ½ãng hoŸn cï nhõng cáng viÎc hoŸn cï ½¬ ½õìc b°t ½·u sau ng¡y 1.8.1999, hoć (c) Cáng viÎc hoŸn cï ½õìc ho¡n th¡nh sau ng¡y 1.2.2002

3.2 KÆt c¶u thµn t¡u 3.2.1 Bâ trÏ cŸc vŸch ng¯n trong khoang chê d·u h¡ng

‡âi vèi cŸc khoang chê d·u h¡ng, cŸc vŸch ng¯n kÏn d·u phï ½õìc bâ trÏ sao cho lõìng d·u dú kiÆn chÿ ra v¡ kÏch thõèc gièi h−n cða t÷ng k¾t d·u h¡ng riÅng biÎt kháng ½õìc võìt quŸ cŸc giŸ trÙ hõ hÞng gi¨ ½Ùnh ½õìc xŸc ½Ùnh nhõ dõèi ½µy :

(1) Nh±m mòc ½Ïch tÏnh toŸn lõìng d·u dú kiÆn chÿ ra t÷ t¡u d·u, l¶y 3 kÏch thõèc cða lå thðng cða mæt hÖnh hæp ê trÅn m−n v¡ ½Ÿy t¡u phï hìp vèi B¨ng 3-3 v¡ B¨ng 3-4.

(2) Lõìng d·u dú kiÆn chÿ ra khi hÞng m−n (Oc) v¡ hÞng ½Ÿy (Os) phï ½õìc tÏnh theo cŸc cáng thöc dõèi ½µy cho nhùng khoang bÙ hõ hÞng ê b¶t kü chå n¡o theo chiËu d¡i t¡u vèi kÏch thõèc chå hõ hÞng l¶y nhõ ½¬ nÅu ê (1).

(a) (i) ‡âi vèi hõ hÞng m−n :

Oc = ΣWi + ΣKiCi (I)

(ii) ‡âi vèi hõ hÞng ½Ÿy :

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OS = 31

(ΣZiWi + ΣZiCi) (II)

Trong trõéng hìp khi hõ hÞng ½Ÿy bao gãm ½ãng théi c¨ 4 k¾t trung tµm, trÙ sâ OS cÜ thÌ ½õìc tÏnh theo cáng thöc :

Os = 41

(ΣZiWi + ΣZKiCi) (III)

Trong ½Ü : Wi : ThÌ tÏch cða k¾t m−n tÏnh b±ng m3 ½õìc gi¨ thiÆt l¡ bÙ thðng do hõ hÞng nhõ ½õìc nÅu ê

(1); Wi ½âi vèi k¾t nõèc d±n cŸch ly cÜ thÌ ½õìc l¶y b±ng 0. Ci : ThÌ tÏch k¾t trung tµm tÏnh b±ng m3 ½õìc gi¨ thiÆt l¡ bÙ thðng do hõ hÞng nhõ ½õìc nÅu

ê (1); Ci ½âi vèi k¾t nõèc d±n cŸch ly cÜ thÌ ½õìc l¶y b±ng 0.

Ki = 1 - bi/tc

Khi bi b±ng hoć lèn hçn tc, l¶y Ki b±ng 0

Zi = 1 - hi/vs

Khi hi b±ng hoć lèn hçn vs, l¶y Zi b±ng 0. bi : ChiËu ræng nhÞ nh¶t cða k¾t m−n tÏnh b±ng m¾t ½o t÷ m¾p trong cða tán m−n theo

phõçng vuáng gÜc vèi m´t ph²ng dàc tµm ê möc tõçng öng vèi m−n khá mïa h¿ ½¬ ½Ùnh.

hi : ChiËu cao nhÞ nh¶t cða ½Ÿy ½ái ½õìc tÏnh b±ng m¾t, khi kháng cÜ ½Ÿy ½ái hi ½õìc l¶y b±ng 0.

B¨ng 3-3 Möc ½æ hõ hÞng m−n

ChiËu Möc ½æ hõ hÞng

ChiËu dàc (lc) 1/3 Lf2/3 hoć 14,5 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn

ChiËu ngang (tc) B/5 hoć 11,5 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn (‡o ê trong tÏnh t÷ tán m−n theo phõçng vuáng gÜc ½Æn ½õéng tµm ê möc tõçng öng vèi m−n khá mïa h¿ ½¬ ½Ùnh)

ChiËu th²ng ½öng (vc) T÷ ½õéng lû thuyÆt cða tán ½Ÿy t−i ½õéng tµm t¡u, hõèng lÅn kháng gièi h−n

B¨ng 3-4 Möc ½æ hõ hÞng ½Ÿy


0,3Lf t÷ ½õéng vuáng gÜc mñi cða t¡u B¶t kü ph·n n¡o khŸc cða t¡u

ChiËu dàc (ls) Lf/10 Lf/10 hoć 5 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn

ChiËu ngang (ts) B/6 hoć 10 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn nhõng kháng nhÞ hçn 5 m¾t 5 m¾t

ChiËu th²ng ½öng (vs) B/15 hoć 6 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn, ½õìc ½o t÷ ½õéng lû thuyÆt cða t¶m tán ½Ÿy t−i ½õéng tµm t¡u.

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(b) NÆu mæt khoang trâng hoć k¾t d±n cŸch ly cÜ chiËu d¡i nhÞ hçn lc nhõ ½õìc nÅu ê (1) ½õìc l°p ½´t ê giùa cŸc k¾t d·u m−n, thÖ Oc trong cáng thöc (I) ê (a) (ii) cÜ thÌ ½õìc tÏnh trÅn cç sê thÌ tÏch wi l¡ thÌ tÏch thúc cða mæt k¾t nhõ vºy hoć cða k¾t nhÞ hçn trong 2 k¾t kË sŸt khoang nhõ vºy, ½õìc nhµn vèi Si nhõ ½õìc xŸc ½Ùnh dõèi ½µy v¡ l¶y giŸ trÙ cða thÌ tÏch thúc cho t¶t c¨ cŸc k¾t m−n khŸc chÙu va ch−m nhõ vºy :

Si = 1 - li / lc

Trong ½Ü : li : ChiËu d¡i khoang trâng hoć k¾t d±n cŸch ly cÜ liÅn quan.

(c) ViÎc tÏnh toŸn ê (a) trÅn phï ½õìc thúc hiÎn phï hìp vèi cŸc qui ½Ùnh t÷ (i) ½Æn (iii) sau ½µy : (i) Ch× cáng nhºn ½âi vèi cŸc k¾t ½Ÿy ½ái nÜi trÅn hoć rång hoć ½ang chê nõèc d±n s−ch khi

d·u h¡ng ½õìc chê trong cŸc k¾t. (ii) Khi ½Ÿy ½ái kháng ch−y hÆt chiËu d¡i v¡ chiËu ræng cða k¾t ½ang x¾t thÖ xem l¡ kháng cÜ ½Ÿy

½ái v¡ thÌ tÏch cða k¾t bÅn trÅn vïng hõ hÞng ½Ÿy phï ½õìc tÏnh ½Æn trong cáng thöc (II) hoć (III) ê (a)(i) ngay c¨ khi k¾t n¡y kháng ½õìc coi l¡ hõ hÞng do cÜ mæt ph·n ½Ÿy ½ái nhõ vºy.

(iii) Khi xŸc ½Ùnh trÙ sâ hi cÜ thÌ kháng tÏnh cŸc giÆng hît vèi ½iËu kiÎn cŸc giÆng ½Ü cÜ diÎn tÏch kháng lèn quŸ v¡ ¯n sµu xuâng dõèi k¾t mæt kho¨ng ng°n nh¶t, v¡ trong b¶t cö trõéng hìp n¡o ½æ sµu cða cŸc giÆng kháng lèn hçn nøa chiËu cao ½Ÿy ½ái. NÆu ½æ sµu cða giÆng quŸ nøa chiËu cao ½Ÿy ½ái thÖ hi ½õìc l¶y b±ng chiËu cao ½Ÿy ½ái tr÷ ½i chiËu sµu cða giÆng. ‡õéng âng phòc vò cŸc giÆng n¡y n±m trong khu vúc ½Ÿy ½ái phï cÜ cŸc van hoć thiÆt bÙ chń khŸc ê chå nâi giùa ½õéng âng vèi k¾t ½Ì ½Ë phÝng chÿ d·u khi xÿ ra hõ hÞng ½õéng âng. ‡õéng âng n¡y ½´t c¡ng cao so vèi tán ½Ÿy t¡u c¡ng tât.

(3) K¾t h¡ng cða t¡u d·u phï cÜ kÏch thõèc v¡ ½õìc bâ trÏ sao cho lõìng d·u dú kiÆn chÿ ra Oc hoć Os ½õìc tÏnh thÞa m¬n quy ½Ùnh (2) ê b¶t kü chå n¡o theo chiËu d¡i t¡u kháng ½õìc võìt quŸ 30.000 m3 hoć 400 3 DW , l¶y giŸ trÙ n¡o lèn hçn, nhõng kháng quŸ 40.000 m3. Tuy nhiÅn, ½âi vèi thiÆt bÙ cÜ kh¨ n¯ng chuyÌn d·u t÷ k¾t d·u h¡ng bÙ hÞng hoć cŸc k¾t ½Æn mæt k¾t nõèc d±n cŸch ly hoć mæt k¾t d·u h¡ng khŸc h¬y cÝn vçi, v¡ k¾t d·u h¡ng n¡y ½õìc l°p vèi mæt phõçng tiÎn hît d·u m−nh dïng cho trõéng hìp sú câ, thÖ cÜ thÌ dïng cáng thöc (III) ê (2).

‡iËu kiÎn ê ½µy l¡ thiÆt bÙ phï cÜ kh¨ n¯ng vºn chuyÌn khâi lõìng d·u tõçng ½õçng vèi mæt nøa dung tÏch cða k¾t lèn nh¶t trong sâ cŸc k¾t bÙ hÞng trong 2 gié ho−t ½æng v¡ k¾t nõèc d±n hoć k¾t d·u h¡ng cÜ thÌ nhºn to¡n bæ sâ lõìng d·u ½¬ nÜi. ‡õéng âng dïng cho thiÆt bÙ hît d·u m−nh phï ½õìc l°p ½´t ê mæt ½æ cao lèn hçn chiËu cao chå hÞng ½Ÿy.

(4) CŸc k¾t d·u h¡ng riÅng biÎt phï kháng ½õìc võìt quŸ kÏch thõèc sau ½µy : (a) ThÌ tÏch mæt k¾t d·u h¡ng m−n b¶t kü cða t¡u d·u phï kháng ½õìc quŸ 75% gièi h−n cða lõìng

d·u dú kiÆn chÿ ra ½õìc ch× d¹n ê (3). ThÌ tÏch k¾t d·u h¡ng trung tµm b¶t kü phï kháng ½õìc quŸ 50.000 m3. Tuy nhiÅn, ê cŸc t¡u d·u cÜ k¾t d±n cŸch ly nhõ ½õìc nÅu ê 3.2.3, thÌ tÏch cho ph¾p cða k¾t d·u h¡ng m−n ½õìc ½´t giùa 2 k¾t d±n cŸch ly, måi k¾t cÜ chiËu d¡i võìt quŸ lc, cÜ thÌ ½õìc t¯ng thÅm ½Æn gièi h−n lèn nh¶t cða lõìng d·u dú kiÆn chÿ ra vèi ½iËu kiÎn chiËu ræng cða cŸc k¾t m−n võìt quŸ tc.

(b) ChiËu d¡i cða måi k¾t h¡ng kháng ½õìc võìt quŸ 10 m¾t hoć mæt trong cŸc giŸ trÙ sau ½µy, l¶y giŸ trÙ n¡o lèn hçn : (i) Khi kháng cÜ vŸch dàc bÅn trong cŸc k¾t h¡ng :

(0,5 Bbn

+ 0,1) Lf

nhõng kháng quŸ 0,2 Lf

(ii) Khi cÜ vŸch dàc tµm t¡u bÅn trong cŸc k¾t h¡ng :

(0,25Bbn

+ 0,15) Lf

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(iii) Khi cÜ t÷ 2 vŸch dàc trê lÅn ê trong cŸc k¾t h¡ng : - ‡âi vèi cŸc k¾t h¡ng m−n : 0,2 Lf

- ‡âi vèi cŸc k¾t h¡ng trung tµm :

+ NÆu Bbn

b±ng hoć lèn hçn 1/5 : 0,2 Lf

+ NÆu Bbn

nhÞ hçn 1/5 :

Khi kháng cÜ vŸch dàc tµm t¡u :

(0,5 Bbn

+ 0,1) Lf

Khi cÜ vŸch dàc tµm t¡u :

(0,25 Bbn

+ 0,15) Lf

("bn" l¡ kho¨ng cŸch nhÞ nh¶t tÏnh b±ng m¾t t÷ m−n t¡u ½Æn bÅn ngo¡i vŸch dàc cða k¾t ½ang nÜi ½Æn ½õìc ½o ê bÅn trong theo phõçng vuáng gÜc vèi ½õéng tµm ê möc tõçng öng vèi m−n khá mïa h¿ ½¬ ½Ùnh).

(5) ‡Ì kháng võìt quŸ gièi h−n thÌ tÏch ½õìc xŸc ½Ùnh theo qui ½Ùnh (3) v¡ (4) v¡ kháng kÌ kiÌu hÎ thâng vºn chuyÌn h¡ng ½õìc ch¶p nhºn ½¬ l°p ½´t, khi hÎ thâng ½õìc xŸc ½Ùnh ê (3) nâi liËn 2 k¾t h¡ng hoć nhiËu hçn vèi nhau, thÖ phï trang bÙ cŸc van (bao gãm c¨ cŸc thiÆt bÙ ½Üng kÏn tõçng tú khŸc) ½Ì ng¯n cŸch cŸc k¾t vèi nhau.

(6) CŸc tuyÆn ½õéng âng ½õìc nâi vèi cŸc k¾t h¡ng ½´t t−i vÙ trÏ nhÞ hçn tc tÏnh t÷ m−n t¡u hoć nhÞ hçn vs tÏnh t÷ ½Ÿy t¡u phï ½õìc l°p cŸc van hoć cŸc thiÆt bÙ ½Üng tõçng tú ê ½iÌm ½õéng âng tháng v¡o k¾t d·u h¡ng.

3.2.2 Phµn khoang v¡ än ½Ùnh

1 Mài t¡u d·u phï thÞa m¬n cŸc tiÅu chu¸n phµn khoang v¡ än ½Ùnh tai n−n quy ½Ùnh ê 3.2.2-3 sau khi xÿ ra sú hõ hÞng gi¨ ½Ùnh ê m−n hoć ½Ÿy nhõ ½õìc nÅu ê 3.2.2-2 cho b¶t kü chiËu chÖm khai thŸc n¡o öng vèi cŸc tr−ng thŸi tï tràng thúc cÜ tÏnh ½Æn ½æ chîi v¡ söc bËn cða t¡u cñng nhõ khâi lõìng riÅng cða h¡ng. Sú hõ hÞng nhõ vºy phï ½õìc x¾t cho cŸc vÙ trÏ cÜ thÌ xÿ ra dàc theo chiËu d¡i t¡u nhõ ½õìc nÅu ê (1) ½Æn (3) dõèi ½µy :

(1) ê cŸc t¡u d·u d¡i trÅn 225 m¾t : b¶t kü vÙ trÏ n¡o theo chiËu d¡i t¡u.

(2) ê cŸc t¡u d·u d¡i hçn 150 m¾t nhõng kháng quŸ 225 m¾t : b¶t kü vÙ trÏ n¡o theo chiËu d¡i t¡u, tr÷ hõ hÞng cÜ ¨nh hõêng ½Æn vŸch phÏa trõèc hoć phÏa sau cða buãng mŸy n±m ê phÏa ½uái t¡u. Buãng mŸy ½õìc x¾t nhõ mæt khoang ngºp nõèc duy nh¶t.

(3) ê cŸc t¡u d·u d¡i kháng quŸ 150 m¾t : b¶t kü vÙ trÏ n¡o theo chiËu d¡i t¡u giùa cŸc vŸch ngang kÆ tiÆp nhau, tr÷ khu vúc buãng mŸy. ‡âi vèi t¡u d·u d¡i t÷ 100 m¾t trê xuâng khi t¶t c¨ cŸc qui ½Ùnh ê 3.2.2-3 kháng thÌ ½Ÿp öng ½õìc m¡ kháng l¡m ¨nh hõêng ½Ÿng kÌ kh¨ n¯ng ho−t ½æng cða t¡u thÖ ‡¯ng kiÌm cÜ thÌ cho ph¾p gi¨m nhÂ cŸc qui ½Ùnh n¡y. Tr−ng thŸi d±n khi t¡u kháng chê d·u (tr÷ cń d·u) trong cŸc k¾t h¡ng kháng phï tÏnh ½Æn.

2 CŸc yÅu c·u sau ½µy vË kÏch thõèc v¡ ½ć ½iÌm cða hõ hÞng gi¨ ½Ùnh phï ½õìc Ÿp dòng :

(1) KÏch thõèc hõ hÞng m−n nÅu ê B¨ng 3-5.

(2) KÏch thõèc hõ hÞng ½Ÿy nÅu ê B¨ng 3-6.

(3) NÆu hõ hÞng b¶t kü cÜ kÏch thõèc nhÞ hçn kÏch thõèc hõ hÞng lèn nh¶t ½õìc nÅu ê (1) v¡ (2) ½õa ½Æn tr−ng thŸi nguy hiÌm hçn thÖ hõ hÞng ½Ü phï ½õìc x¾t ½Æn.

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(4) Khi sú hõ hÞng ¨nh hõêng ½Æn cŸc vŸch ngang ½¬ dú tÏnh nhõ ê 3.2.2-1(1) v¡ (2), thÖ cŸc vŸch ngang kÏn nõèc phï ½õìc ½´t Ït nh¶t ê kho¨ng cŸch b±ng kÏch thõèc dàc cða hõ hÞng gi¨ ½Ùnh ½õìc nÅu ê (1) ½Ì ½õìc xem l¡ hiÎu qu¨. NÆu cŸc vŸch ngang ½õìc ½´t ê kho¨ng cŸch ng°n hçn thÖ cŸc vŸch n±m trong vïng hõ hÞng nhõ vºy phï ½õìc gi¨ ½Ùnh l¡ kháng cÜ khi xŸc ½Ùnh cŸc khoang bÙ ngºp.

(5) Khi hõ hÞng giùa cŸc vŸch kÏn nõèc kÆ tiÆp nhau ½õìc dú tÏnh nhõ ½¬ nÅu ê 3.2.2-1(3), thÖ kháng mæt vŸch ngang chÏnh hoć mæt vŸch ngang ng¯n cŸch cŸc k¾t m−n hoć cŸc k¾t ½Ÿy ½ái ½õìc gi¨ ½Ùnh bÙ hÞng, tr÷ cŸc trõéng hìp sau : (a) Kho¨ng cŸch giùa 2 vŸch ngang kÆ tiÆp nhau nhÞ hçn kÏch thõèc dàc cða hõ hÞng gi¨ ½Ùnh ½õìc

nÅu ê (1); hoć (b) CÜ mæt bºc hoć hßm ê mæt vŸch ngang d¡i hçn 3,05 m¾t n±m trong ph−m vi kÏch thõèc lå thðng

cða hõ hÞng gi¨ ½Ùnh. Trong qui ½Ùnh n¡y, nÆu bºc ½õìc t−o th¡nh bêi vŸch k¾t ½uái v¡ ½×nh k¾t ½uái thÖ kháng ½õìc coi l¡ bºc.

(6) NÆu trong ph−m vi kÏch thõèc cða hõ hÞng cÜ ½´t cŸc âng, hoć ½õéng h·m thÖ viÎc bâ trÏ phï sao cho nõèc ngºp kháng thÌ theo cŸc ½õéng ½Ü lan sang cŸc khoang kháng phï l¡ khoang ½õìc gi¨ ½Ùnh ngºp nõèc vèi mài trõéng hìp hõ hÞng.

3 CŸc t¡u d·u ½õìc coi l¡ phï hìp vèi cŸc tiÅu chu¸n än ½Ùnh tai n−n nÆu thÞa m¬n cŸc qui ½Ùnh nÅu ê (1) ½Æn (5) sau ½µy : (1) ‡õéng nõèc cuâi cïng, cÜ tÏnh ½Æn ngºp nõèc, ½æ nghiÅng v¡ ½æ chîi, phï n±m th¶p hçn m¾p dõèi cða

b¶t cö lå kho¾t n¡o m¡ qua ½Ü nõèc cÜ thÌ tr¡n v¡o khoang. CŸc lå kho¾t nhõ vºy phï bao gãm c¨ cŸc âng tháng hçi v¡ cŸc lå kho¾t ½õìc ½Üng kÏn b±ng cøa kÏn théi tiÆt hoć n°p h·m h¡ng, cÜ thÌ tr÷ cŸc lå ngõéi chui ½õìc ½Üng b±ng n°p kÏn nõèc v¡ cŸc lå tháng tr¡n, n°p miÎng k¾t h¡ng nhÞ kÏn nõèc m¡ chîng bö ½¨m tÏnh kÏn nõèc nguyÅn vÂn cða boong, cŸc cøa trõìt kÏn nõèc ½iËu khiÌn t÷ xa v¡ cŸc cøa m−n kiÌu kháng mê ½õìc.

(2) ê giai ½o−n ngºp nõèc cuâi cïng, gÜc nghiÅng sinh ra do ngºp kháng ½âi xöng kháng ½õìc võìt quŸ 25o, gÜc n¡y cÜ thÌ t¯ng lÅn tèi 30o vèi ½iËu kiÎn kháng mæt m¾p boong n¡o ½õìc ngºp nõèc.

(3) än ½Ùnh ê giai ½o−n ngºp nõèc cuâi cïng cÜ thÌ ½õìc coi l¡ ½ð nÆu ½õéng cong cŸnh tay ½Ýn än ½Ùnh cÜ Ït nh¶t ph−m vi 20o phÏa trÅn ½iÌm cµn b±ng öng vèi trÙ sâ lèn nh¶t cða cŸnh tay ½Ýn än ½Ùnh tØnh ê möc tâi thiÌu 0,1 m¾t. DiÎn tÏch trong ph−m vi dõèi ½õéng cong n¡y phï l¡ 0,0175 m.radian hoć lèn hçn. Tr÷ trõéng hìp m¡ cŸc khoang liÅn quan ½õìc gi¨ ½Ùnh bÙ ngºp, cŸc lå kho¾t kháng ½õìc bö vÎ phï ½õìc gi¨ ½Ùnh kháng bÙ ngºp. Trong vïng n¡y, t¶t c¨ cŸc lå kho¾t ½õìc nÅu ê (1) v¡ cŸc lå kho¾t khŸc m¡ chîng cÜ thÌ ½õìc ½Üng b±ng n°p kÏn nõèc cÜ thÌ ½õìc ‡¯ng kiÌm ch¶p nhºn.

(4) Phï bö ½¨m r±ng t¡u ½ð än ½Ùnh trong cŸc giai ½o−n ngºp nõèc trung gian. (5) Ngay c¨ trong trõéng hìp khi mæt hÎ thâng l¡m cµn b±ng c·n sú trì giîp cç khÏ nhõ cŸc van hoć cŸc

âng nâi trung gian nh±m mòc ½Ïch gi¨m gÜc nghiÅng hoć ½−t ½õìc ½æ än ½Ùnh dõ tâi thiÌu ½õìc trang bÙ ½Ì thÞa m¬n cŸc qui ½Ùnh ê (1) ½Æn (3), thÖ cŸc trang bÙ ½Ü kháng phï ½õa v¡o tÏnh toŸn, v¡ ½æ än ½Ùnh dõ ½ð phï ½õìc duy trÖ ê t¶t c¨ cŸc giai ½o−n phòc vò cða hÎ thâng l¡m cµn b±ng. CŸc kháng gian ½õìc nâi tháng qua cŸc âng cÜ tiÆt diÎn lèn cÜ thÌ ½õìc xem nhõ l¡ kháng gian chung.

B¨ng 3-5 Möc ½æ hõ hÞng m−n


ChiËu dàc 1/3 Lf2/3 hoć 14,5 m¾t, l¶y trÙ sâ n¡o nhÞ hçn

ChiËu ngang B/5 hoć 11,5 m¾t, l¶y trÙ sâ n¡o nhÞ hçn (phÏa trong t÷ m−n t¡u t−i gÜc vuáng vèi ½õéng tµm t¡u ê möc tõçng öng vèi m−n khá mïa h¿)

ChiËu th²ng ½öng T÷ ½õéng lû thuyÆt cða tán ½Ÿy t−i ½õéng tµm t¡u, hõèng lÅn kháng gièi h−n

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B¨ng 3-6 Möc ½æ hõ hÞng ½Ÿy


‡âi vèi 0,3 Lf t÷ ½õéng th²ng gÜc phÏa mñi t¡u

B¶t kü ph·n n¡o khŸc cða t¡u

ChiËu dàc 1/3 lf2/3 hoć 14,3 m¾t, l¶y trÙ sâ n¡o nhÞ hçn

1/3 Lf2/3

hoć 5 m¾t, l¶y trÙ sâ n¡o nhÞ hçn

ChiËu ngang B/6 hoć 10 m¾t, l¶y trÙ sâ n¡o nhÞ hçn

B/6 hoć 5 m¾t, l¶y trÙ sâ n¡o nhÞ hçn

ChiËu th²ng ½öng B/15 hoć 6 m¾t, l¶y trÙ sâ n¡o nhÞ hçn, ½õìc ½o t÷ tán ½Ÿy t−i ½õéng tµm t¡u

4 CŸc qui ½Ùnh ê -1 trÅn phï ½õìc xŸc nhºn b±ng tÏnh toŸn cÜ x¾t ½Æn cŸc ½ć tÏnh thiÆt kÆ cða t¡u, cŸch bâ trÏ, tuyÆn hÖnh v¡ h¡ng chöa bÅn trong cŸc khoang bÙ hÞng, v¡ sú phµn bâ, khâi lõìng riÅng v¡ ¨nh hõêng m´t thoŸng cða ch¶t lÞng. CŸc tÏnh toŸn phï dúa trÅn cŸc qui ½Ùnh ê (1) ½Æn (5) sau ½µy :

(1) Phï tÏnh ½Æn b¶t kü k¾t rång hoć k¾t ½õìc chöa mæt ph·n n¡o, khâi lõìng riÅng cða h¡ng ½õìc chê cñng nhõ b¶t kü lõìng ch¶t lÞng n¡o chÿ ra khÞi cŸc khoang bÙ hÞng.

(2) Phï th÷a nhºn cŸc hÎ sâ ngºp nõèc nhõ ½õìc cho ê B¨ng 3-7.

(3) Kháng tÏnh ½Æn tÏnh näi cða thõìng t·ng b¶t kü n±m ngay phÏa trÅn chå hÞng m−n. Tuy nhiÅn, cŸc ph·n kháng bÙ ngºp cða thõìng t·ng n±m ngo¡i ph−m vi hõ hÞng cÜ thÌ ½õìc x¾t ½Æn vèi ½iËu kiÎn l¡ chîng tŸch biÎt khÞi khoang bÙ hÞng b±ng cŸc vŸch ng¯n kÏn nõèc v¡ tho¨ m¬n cŸc qui ½Ùnh ê 3.2.2-3 vË cŸc kháng gian nguyÅn vÂn. CŸc cøa kÏn nõèc cÜ b¨n lË cÜ thÌ ch¶p nhºn l¡ cŸc vŸch ng¯n kÏn nõèc trong thõìng t·ng.

(4) ¨nh hõêng cða m´t thoŸng phï ½õìc tÏnh ½Æn t−i gÜc nghiÅng 5o ½âi vèi t÷ng khoang riÅng biÎt. ‡¯ng kiÌm cÜ thÌ yÅu c·u hoć cho ph¾p hiÎu ch×nh m´t thoŸng ½õìc tÏnh toŸn t−i gÜc nghiÅng lèn hçn 5o ½âi vèi cŸc k¾t bÙ ngºp t÷ng ph·n.

(5) Khi tÏnh toŸn ¨nh hõêng cða m´t thoŸng ch¶t lÞng tiÅu thò, phï gi¨ thiÆt r±ng, måi lo−i ch¶t lÞng ê trong Ït nh¶t mæt c´p k¾t ngang hoć mæt k¾t trung tµm ½Ëu cÜ m´t thoŸng, v¡ k¾t hoć c´p k¾t n¡y ½õìc x¾t ½Æn vèi ¨nh hõêng cða m´t thoŸng l¡ lèn nh¶t.

B¨ng 3-7 HÎ sâ ngºp nõèc

Buãng HÎ sâ ngºp nõèc

Dïng ½Ì l¡m kho 0,60

Dïng l¡m buãng ê 0,95

‡Ì ½´t mŸy mÜc 0,85

‡Ì trâng 0,95

Dïng ½Ì chöa ch¶t lÞng dïng h¡ng ng¡y 0 - 0,95*

Dïng ½Ì chöa cŸc ch¶t lÞng khŸc 0 - 0,95*

Chî thÏch : * HÎ sâ ngºp nõèc cða khoang bÙ ngºp t÷ng ph·n phï phï hìp vèi lõìng ch¶t lÞng ½õìc chê. Måi khi sú

hõ hÞng mê ræng ½Æn b¶t kü k¾t n¡o ½ang chöa ch¶t lÞng, thÖ phï cho r±ng dung lõìng l¡ to¡n bæ lõìng ch¶t lÞng chÿ ra cða khoang ½õìc thay b±ng nõèc mń ngºp ½Æn möc m´t ph²ng cµn b±ng cuâi cïng.

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5 Mài t¡u d·u Ÿp dòng cŸc qui ½Ùnh trong Ph·n n¡y phï thÞa m¬n cŸc yÅu c·u ê (1) v¡ (2) sau ½µy :

(1) Tháng bŸo liÅn quan ½Æn viÎc l¡m h¡ng v¡ phµn bâ h¡ng ½Ì ½¨m bö thÞa m¬n qui ½Ùnh 3.2.2, v¡

(2) CŸc sâ liÎu vË kh¨ n¯ng cða t¡u thÞa m¬n tiÅu chu¸n än ½Ùnh tai n−n nhõ ½õìc xŸc ½Ùnh theo 3.2.2, bao gãm c¨ kÆt qu¨ cða cŸc miÍn gi¨m ½¬ ½õìc cho ph¾p theo 3.2.2-1(3) trÅn.

6 T¡u d·u cÜ tràng tï to¡n ph·n t÷ 5.000 t¶n trê lÅn phï tho¨ m¬n tiÅu chu¸n än ½Ùnh nguyÅn vÂn theo ½iËu kiÎn x¶u nh¶t cÜ thÌ xÿ ra cða cŸc tr−ng thŸi h¡ng v¡ d±n trong quŸ trÖnh thao tŸc l¡m h¡ng lÞng. Thao tŸc l¡m h¡ng lÞng nÅu ê -6 nghØa l¡ cŸc thao tŸc chuyÌn h¡ng lÞng ½õìc thúc hiÎn trÅn t¡u nhõ bçm/rÜt h¡ng, chuyÌn tï h¡ng, d±n/ thŸo d±n, chuyÌn nõèc d±n v¡ l¡m s−ch k¾t. Tuy nhiÅn, ½iËu n¡y kháng bao gãm cáng viÎc l¡m d±n/ bçm h¡ng nÆu, trÅn t¡u tÏnh theo cŸc vŸch dàc, t¶t c¨ cŸc k¾t ê mæt bÅn m−n l¡ rång v¡ t¶t c¨ cŸc k¾t ê bÅn m−n kia l¡ vçi/½·y.

(1) TrÅn biÌn, cŸc yÅu c·u ê 2.2.1-1 cða TCVN 6259-8E :2003 phï ½õìc tho¨ m¬n.

(2) T−i c¨ng, chiËu cao tµm nghiÅng G0M phï kháng nhÞ hçn 0,15m

7 ‡âi vèi cŸc t¡u chê h¡ng hån hìp cÜ tràng tï to¡n ph·n t÷ 5.000 t¶n trê lÅn, thay cho viÎc phï tho¨ m¬n cŸc yÅu c·u nÅu ê -6, tháng bŸo än ½Ùnh nguyÅn vÂn trong quŸ trÖnh thao tŸc l¡m h¡ng lÞng phï ½õìc l¡m rß trong Sä tháng bŸo än ½Ùnh ½¬ dõìc ‡¯ng kiÌm duyÎt v¡ t−i tr−m kiÌm soŸt l¡m h¡ng; v¡ nÆu l°p ½´t mŸy tÏnh thÖ kháng sø dòng ½Ì thúc hiÎn cŸc tÏnh toŸn än ½Ùnh.

3.2.3 K¾t d±n cŸch ly

Mài t¡u chê d·u thá cÜ cÜ tràng tï to¡n ph·n t÷ 20.000 t¶n trê lÅn v¡ chê d·u thõçng ph¸m cÜ tràng tï to¡n ph·n t÷ 30.000 t¶n trê lÅn phï trang bÙ cŸc k¾t d±n cŸch ly cÜ dung tÏch v¡ bâ trÏ nhõ sau ½µy. Tuy nhiÅn, kháng ½Ýi hÞi tuµn thð cŸc ½iËu kho¨n cða cŸc qui ½Ùnh ê (2) dõèi ½µy khi Ÿp dòng 3.2.4 :

(1) Dung tÏch cŸc k¾t d±n cŸch ly trong t¶t c¨ cŸc tr−ng thŸi d±n kÌ c¨ khi kháng h¡ng v¡ ch× d±n cŸch ly phï sao cho chiËu chÖm v¡ ½æ chîi cÜ thÌ thÞa m¬n t÷ng qui ½Ùnh (a) ½Æn (c) sau ½µy. Tuy nhiÅn, cŸc ½iËu kiÎn d±n cŸch ly ½âi vèi t¡u d·u cÜ chiËu d¡i dõèi 150 m¾t phï thÞa m¬n cŸc yÅu c·u cða ‡¯ng kiÌm. (a) ChiËu chÖm lû thuyÆt ê giùa t¡u (dm) tÏnh b±ng m¾t (kháng tÏnh ½Æn sú biÆn d−ng cða t¡u) phï

kháng nhÞ hçn :

2,0 + 0,02 Lf

(b) ChiËu chÖm t−i ½õéng vuáng gÜc mñi v¡ ½uái phï tõçng öng vèi cŸc giŸ trÙ ½õìc xŸc ½Ùnh theo chiËu chÖm giùa t¡u (dm) nhõ ½õìc nÅu ê (a) cða mòc n¡y, khi chîi ½uái kháng lèn hçn 0,015L, v¡

(c) Trong b¶t cö trõéng hìp n¡o chiËu chÖm t−i ½õéng vuáng gÜc ½uái kháng nhÞ hçn chiËu chÖm c·n thiÆt ½Ì ngºp ho¡n to¡n chµn vÙt.

(2) CŸc k¾t d±n cŸch ly ½õìc ½´t trong ph−m vi cŸc khoang d·u h¡ng phï thÞa m¬n cŸc qui ½Ùnh (a) ½Æn (c) sau ½µy ½Ì ½¨m bö biÎn phŸp ng¯n ng÷a sú chÿ d·u trong trõéng hìp ½µm va hoć m°c c−n : (a) CŸc k¾t d±n cŸch ly v¡ cŸc khoang kÏn khŸc kháng phï l¡ k¾t d·u h¡ng n±m trong ph−m vi chiËu

d¡i k¾t d·u h¡ng Lf phï ½õìc bâ trÏ sao cho thÞa m¬n cŸc qui ½Ùnh sau ½µy :

ΣPAc + ΣPAs ≥ J [Lt (B + 2D)]

Trong ½Ü : PAc: Vïng tán m−n tÏnh b±ng m2 vèi t÷ng k¾t d±n cŸch ly hoć khoang kháng phï l¡ k¾t chöa

d·u, l¶y theo cŸc kÏch thõèc tÏnh toŸn lû thuyÆt. PAs: Vïng tán ½Ÿy tÏnh b±ng m2 ½âi vèi t÷ng k¾t hoć buãng ½Ü l¶y theo cŸc kÏch thõèc tÏnh

toŸn lû thuyÆt. Lt : ChiËu d¡i giùa m¾p ½·u v¡ cuâi cða cŸc k¾t h¡ng, tÏnh b±ng m¾t.

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D : ChiËu cao lû thuyÆt ½õìc ½o th²ng ½öng t÷ m¾p trÅn cða sâng ½Ÿy ½Æn m¾p trÅn cða x¡ ngang boong m−n khá t−i m−n ê giùa t¡u, tÏnh b±ng m¾t. ê cŸc t¡u cÜ m¾p m−n vÅ trÝn, chiËu cao lû thuyÆt phï ½õìc ½o ½Æn giao ½iÌm cða cŸc ½õéng boong lû thuyÆt v¡ ½õéng tán m−n lû thuyÆt, cŸc ½õéng k¾o d¡i khi ½i qua m¾p m−n thuæc kÆt c¶u gÜc.

J : J = 0,45 ½âi vèi t¡u d·u cÜ tràng tï to¡n ph·n 20.000 t¶n J = 0,30 ½âi vèi t¡u d·u cÜ tràng tï to¡n ph·n t÷ 200.000 t¶n trê lÅn, cÜ tÏnh ½Æn cŸc

yÅu c·u cða ½iÌm (b) cða qui ½Ùnh n¡y. ‡âi vèi cŸc t¡u cÜ giŸ trÙ trung gian cða tràng tï, ½−i lõìng J ½õìc xŸc ½Ùnh b±ng næi suy

tuyÆn tÏnh. (b) ‡âi vèi cŸc t¡u d·u cÜ tràng tï to¡n ph·n t÷ 200.000 t¶n trê lÅn, ½−i lõìng J cÜ thÌ ½õìc gi¨m nhõ

sau :

J½õìc gi¨m = [J - (a -Oc + Os / 4.OA)] hoć b±ng 0,2, l¶y giŸ trÙ n¡o lèn hçn Trong ½Ü :

a = 0,25 ½âi vèi t¡u d·u cÜ tràng tï to¡n ph·n 200.000 t¶n a = 0,40 ½âi vèi t¡u d·u cÜ tràng tï to¡n ph·n 300.000 t¶n a = 0,50 ½âi vèi t¡u d·u cÜ tràng tï to¡n ph·n 420.000 t¶n trê lÅn

‡âi vèi cŸc giŸ trÙ trung gian cða tràng tï, ½−i lõìng a ½õìc xŸc ½Ùnh b±ng næi suy tuyÆn tÏnh. Oc v¡ Os : l¡ cŸc ½−i lõìng ½õìc nÅu ê 3.2.1 (2) OA : l¡ lõìng d·u cho ph¾p chÿ ra ½õìc nÅu ê 3.2.1 (3).

(c) Khi xŸc ½Ùnh PAc v¡ PAs cða cŸc khoang kÏn kháng phï l¡ k¾t d±n cŸch ly v¡ k¾t d·u h¡ng, phï tuµn theo cŸc qui ½Ùnh ê (i) v¡ (ii) sau ½µy : (i) ChiËu ræng cða mæt k¾t m−n sµu to¡n ph·n, k¾t m−n cÜ chiËu cao k¾o d¡i t÷ khoang kÏn khŸc

hoć boong ½Æn ½×nh ½Ÿy ½ái hoć ½Æn khoang kÏn khŸc kháng ½õìc nhÞ hçn 2 m¾t. ChiËu ræng cða k¾t m−n hoć khoang kÏn khŸc ½õìc ½o ê phÏa trong tÏnh t÷ m−n t¡u theo phõçng vuáng gÜc ½Æn ½õéng tµm t¡u. K¾t m−n hoć khoang kÏn khŸc b¶t kü cÜ chiËu ræng nhÞ nh¶t nhÞ hçn 2 m¾t kháng ½õìc tÏnh ½Æn khi xŸc ½Ùnh PAc.

(ii) ChiËu cao th²ng ½öng nhÞ nh¶t cða t÷ng k¾t ½Ÿy ½ái hoć khoang kÏn khŸc phï kháng nhÞ hçn B/15 hoć 2 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn. CŸc k¾t ½Ÿy ½ái hoć cŸc khoang kÏn khŸc cÜ chiËu cao nhÞ nh¶t nhÞ hçn giŸ trÙ trÅn kháng ½õìc tÏnh ½Æn khi xŸc ½Ùnh PAs. ChiËu ræng nhÞ nh¶t v¡ chiËu cao nhÞ nh¶t cða cŸc k¾t m−n hoć cŸc k¾t ½Ÿy ½ái phï ½õìc ½o ê ngo¡i khu vúc hît khá t¡u v¡ trong trõéng hìp chiËu ræng nhÞ nh¶t phï ½õìc ½o ê ngo¡i b¶t kü vïng m¾p ½õìc vÅ trÝn.

3.2.4 Ng¯n ng÷a á nhiÍm d·u trong trõéng hìp ½µm va hoć m°c c−n

(1) Mài t¡u d·u cÜ tràng tï to¡n ph·n 5000 t¶n trê lÅn phï thÞa m¬n mæt trong cŸc qui ½Ùnh b¶t kü nÅu t÷ (a) ½Æn (c) dõèi ½µy : (a) To¡n bæ chiËu d¡i k¾t h¡ng phï ½õìc bö vÎ b±ng cŸc k¾t d±n hoć cŸc kháng gian kháng phï l¡

k¾t d·u h¡ng v¡ k¾t d·u nhiÅn liÎu nhõ sau : (i) CŸc k¾t m−n hoć cŸc khoang m−n phï mê ræng ra hoć to¡n bæ chiËu cao cða m−n t¡u hoć

t÷ m¾p trÅn cða ½Ÿy ½ái ½Æn boong trÅn cïng, kháng ½Ì û ½Æn m¾p ½õìc vÅ trÝn nÆu cÜ. Chîng phï ½õìc bâ trÏ sao cho cŸc k¾t h¡ng ½õìc ½´t bÅn trong ½õéng tán m−n lû thuyÆt, kháng chå n¡o nhÞ hçn kho¨ng cŸch ω, xem HÖnh 3.1, ½õìc ½o t−i b¶t kü m´t c°t ngang n¡o theo phõçng vuáng gÜc vèi tán m−n, nhõ ½õìc xŸc ½Ùnh dõèi ½µy :

ω = 0,5 + DW/ 20.000 (m)

Hoć b±ng 2,0 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn. Tuy nhiÅn, giŸ trÙ nhÞ nh¶t cða ω = 1,0 m¾t.

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(ii) T−i b¶t kü m´t c°t ngang n¡o chiËu cao cða måi k¾t hoć khoang ½Ÿy ½ái phï sao cho kho¨ng cŸch h giùa ½Ÿy cða cŸc k¾t h¡ng v¡ ½õéng lû thuyÆt cða tán ½Ÿy ½õìc ½o theo phõçng vuáng gÜc vèi tán ½Ÿy nhõ ½õìc ch× ê HÖnh 3.1 kháng nhÞ hçn giŸ trÙ xŸc ½Ùnh dõèi ½µy :

h = B/15, hoć b±ng 2,0 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn.

Tuy nhiÅn, giŸ trÙ nhÞ nh¶t cða h = 1,0 m¾t.

h ≥ ω

ω

ω

c L

h h

h

h <ωω

ω

‡õéng cç sê1,5 h

h

c L

c L HÖnh 3.1

(iii) Khi cŸc kho¨ng cŸch h v¡ ω khŸc nhau t−i chå lõìn cða vïng ½Ÿy t¡u hoć t−i cŸc vÙ trÏ kháng

cÜ lõìn trÝn ½õìc ½Ùnh rß cða ½Ÿy t¡u, thÖ kho¨ng cŸch ω phï õu tiÅn hçn t−i möc võìt quŸ 1,5.h phÏa trÅn ½õéng cç sê nhõ ½õìc ch× ê HÖnh 3.1.

(iv) TrÅn cŸc t¡u chê d·u thá cÜ tràng tï to¡n ph·n t÷ 20.000 t¶n trê lÅn v¡ cŸc t¡u chê d·u thõçng ph¸m cÜ tràng tï to¡n ph·n t÷ 30.000 t¶n trê lÅn, täng dung tÏch cŸc k¾t m−n, cŸc k¾t ½Ÿy ½ái, cŸc k¾t mñi v¡ cŸc k¾t ½uái phï kháng nhÞ hçn dung tÏch cŸc k¾t d±n cŸch ly c·n thiÆt thÞa m¬n cŸc qui ½Ùnh 3.2.3 (1). CŸc k¾t m−n hoć kháng gian m−n v¡ cŸc k¾t ½Ÿy ½ái ½õìc sø dòng thÞa m¬n cŸc qui ½Ùnh 3.2.3 (1) phï ½õìc bâ trÏ theo thúc tÆ c¡ng giâng nhau c¡ng tât dàc theo chiËu d¡i k¾t h¡ng. Dung tÏch k¾t d±n cŸch ly bä sung thÅm ½õìc trang bÙ ½Ì gi¨m öng su¶t uân sâng dàc thµn t¡u, ½æ chîi,v.v... cÜ thÌ ½õìc bâ trÏ ê b¶t kü chå n¡o bÅn trong t¡u.

(v) CŸc giÆng hît trong cŸc k¾t h¡ng cÜ thÌ l¡m lßm v¡o trong ½Ÿy ½ái bÅn dõèi ½õéng gièi h−n ½õìc xŸc ½Ùnh b±ng kho¨ng cŸch h vèi ½iËu kiÎn cŸc giÆng ½Ü nhÞ ½Æn möc cÜ thÌ thúc hiÎn ½õìc v¡ kho¨ng cŸch giùa ½Ÿy giÆng v¡ tán ½Ÿy kháng nhÞ hçn 0,5h.

(vi) ‡õéng âng d±n v¡ cŸc ½õéng âng khŸc nhõ âng ½o v¡ âng tháng hçi cho cŸc k¾t d±n phï kháng xuyÅn qua cŸc k¾t h¡ng. ‡õéng âng h¡ng v¡ cŸc ½õéng âng tõçng tú cho cŸc k¾t h¡ng phï kháng xuyÅn qua cŸc k¾t d±n. ViÎc miÍn cŸc qui ½Ùnh n¡y cÜ thÌ ½õìc ch¶p nhºn cho cŸc âng d¹n cÜ chiËu d¡i ng°n, vèi ½iËu kiÎn chîng ½õìc h¡n kÏn ho¡n to¡n hoć b±ng biÎn phŸp tõçng ½õçng.

(b) To¡n bæ chiËu d¡i k¾t h¡ng phï ½õìc bö vÎ b±ng tán giùa boong, cŸc k¾t d±n hoć cŸc kháng gian kháng phï l¡ k¾t h¡ng v¡ cŸc k¾t d·u ½ât nhõ sau : (i) H¡ng vèi Ÿp su¶t hçi tŸc dòng lÅn tán ½Ÿy t−o th¡nh mæt ranh gièi giùa h¡ng v¡ nõèc biÌn

phï kháng võìt quŸ Ÿp lúc thðy tØnh cða nõèc bÅn ngo¡i nhõ ½õìc trÖnh b¡y b±ng cáng thöc sau ½µy :

f hc ρc g + 100 ∆p ≤ dn ρ s g

Trong ½Ü : hc : ChiËu cao cða h¡ng tiÆp xîc vèi tán ½Ÿy (m¾t) ρc : Khâi lõìng riÅng lèn nh¶t cða h¡ng (t¶n/m3) dn : ChiËu chÖm khai thŸc nhÞ nh¶t trong mài tr−ng thŸi nhºn h¡ng (m¾t) ρs : Khâi lõìng riÅng cða nõèc biÌn (t¶n/m3)

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∆p : Ÿp su¶t ½´t cúc ½−i cða van Ÿp su¶t/ van chµn kháng trang bÙ cho k¾t h¡ng (bar) f : HÎ sâ an to¡n = 1,1 g : Gia tâc tràng trõéng (9,81 m/s2)

(ii) B¶t kü vŸch ngang n¡o c·n thiÆt ½Ì ½Ÿp öng cŸc qui ½Ùnh trÅn phï ½õìc bâ trÏ ê mæt ½æ cao kháng nhÞ hçn B/6 hoć 6 m¾t, l¶y giŸ trÙ n¡o nhÞ hçn, nhõng kháng lèn hçn 0,6D, bÅn trÅn ½õéng cç sê khi D l¡ chiËu cao lû thuyÆt ê giùa t¡u.

(iii) VÙ trÏ cða cŸc k¾t m−n hoć khoang m−n phï ½õìc xŸc ½Ùnh nhõ ê 3.2.4(1)(a)(i), tr÷ ph·n bÅn dõèi ½o−n 1,5h trÅn ½õéng cç sê khi h ½õìc xŸc ½Ùnh ê 3.2.4(1)(a)(ii), thÖ ½õéng bao k¾t d·u h¡ng cÜ thÌ ½õìc k¾o th²ng ½öng xuâng tèi tán ½Ÿy, nhõ ½õìc ch× rß ê HÖnh 3.2.

(iv) TrÅn cŸc t¡u chê d·u thá cÜ tràng tï to¡n ph·n t÷ 20.000 t¶n trê lÅn v¡ cŸc t¡u chê d·u s¨n ph¸m cÜ tràng tï to¡n ph·n t÷ 30.000 t¶n trê lÅn, täng dung tÏch cŸc k¾t m−n, cŸc k¾t mñi, v¡ cŸc k¾t ½uái phï thÞa m¬n cŸc qui ½Ùnh ê 3.2.4(1)(a)(iv).

(v) ‡õéng âng d¹n nõèc d±n v¡ ½õéng âng d¹n h¡ng phï thÞa m¬n cŸc qui ½Ùnh ê 3.2.4(1)(a)(vi).

HÖnh 3.2

‡õéng cç sê

C L

ω

ω

1,5.h

(c) CŸc phõçng phŸp thiÆt kÆ v¡ kÆt c¶u t¡u d·u khŸc cÜ thÌ ½õìc ‡¯ng kiÌm ch¶p nhºn khi chàn lúa so vèi cŸc qui ½Ùnh ½õìc má t¨ ê 3.2.4(1)(a) vèi ½iËu kiÎn cŸc phõçng phŸp ½Ü bö ½¨m Ït nh¶t cÜ cïng möc ½æ ng¯n ng÷a á nhiÍm d·u trong trõéng hìp ½µm va hoć m°c c−n.

(2) ‡âi vèi cŸc t¡u d·u cÜ tràng tï to¡n ph·n t÷ 20.000 t¶n trê lÅn, cŸc gi¨ ½Ùnh hõ hÞng ½õìc má t¨ ê 3.2.2-2(2) phï ½õìc bä sung b±ng hõ hÞng do rŸch tán ½Ÿy gi¨ ½Ùnh theo B¨ng 3-8.

B¨ng 3-8 Möc ½æ hõ hÞng do rŸch tán ½Ÿy


ChiËu dàc

CŸc t¡u tràng tï to¡n ph·n t÷ 75.000 t¶n trê lÅn : 0,6 Lf ½õìc ½o t÷ ½õéng vuáng gÜc mñi

CŸc t¡u tràng tï to¡n ph·n dõèi 75.000 t¶n : 0,4 Lf ½õìc ½o t÷ ½õéng vuáng gÜc mñi

ChiËu ngang B/3, b¶t kü chå n¡o ê ½Ÿy

ChiËu th²ng ½öng Lå thðng cða vÞ ngo¡i

(3) CŸc t¡u d·u khŸc tràng tï to¡n ph·n dõèi 5.000 t¶n phï thÞa m¬n cŸc qui ½Ùnh (a) v¡ (b) sau ½µy :

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TCVN 6276 : 2003, Ph·n 3, Chõçng 3

(a) CŸc k¾t ½Ÿy ½ái hoć khoang ½Ÿy ½ái thÞa m¬n 3.2.4 (1)(a)(ii) phï ½õìc bâ trÏ dàc to¡n bæ chiËu d¡i k¾t h¡ng. Trong trõéng hìp n¡y, kho¨ng cŸch h ½õìc xŸc ½Ùnh ê 3.2.4 (1)(a)(ii) cÜ thÌ ½õìc l¶y theo cáng thöc sau :

h = B/15 (m)

Tuy nhiÅn, khi giŸ trÙ nhÞ nh¶t cða h = 0,76 m¾t t−i vïng lõìn cða háng t¡u v¡ t−i cŸc khu vúc kháng xŸc ½Ùnh ½õìc rß vïng lõìn cða háng, thÖ ½õéng bao k¾t d·u h¡ng phï ch−y song song vèi m´t ph²ng ½Ÿy giùa t¡u nhõ ½õìc ch× ê HÖnh 3.3

C L

h ‡õéng cç sê

h

HÖnh 3.3

(b) ThÌ tÏch cða måi k¾t h¡ng phï kháng ½õìc quŸ 700 m3 tr÷ khi cŸc k¾t m−n hoć kháng gian m−n thÞa m¬n 3.2.4 (1)(a)(i) ½õìc bâ trÏ dàc to¡n bæ chiËu d¡i k¾t h¡ng. Trong trõéng hìp n¡y, kho¨ng cŸch ω ½õìc xŸc ½Ùnh ê 3.2.4 (1)(a)(i) cÜ thÌ ½õìc l¶y theo cáng thöc sau :

ω = 0,4 + 2,4 DW/20.000 (m)

vèi giŸ trÙ nhÞ nh¶t cða ω = 0,76 m¾t.

(4) B¶t kÌ cŸc qui ½Ùnh ê 1.1.3-1, ½âi vèi mæt t¡u d·u cÜ täng dung tÏch t÷ 500 trê lÅn, ch−y tuyÆn quâc tÆ v¡ sâng chÏnh ½õìc ½´t hoć ê giai ½o−n ½Üng tõçng tú v¡o hoć sau ng¡y 1.9.1984, thÖ d·u kháng ½õìc chê trong b¶t kü khoang n¡o ê phÏa trõèc vŸch châng va ½õìc bâ trÏ theo 13.1.1-1 cða TCVN 6259-2A:2003 KÆt c¶u thµn t¡u v¡ trang thiÆt bÙ. CŸc t¡u d·u khŸc kháng phï t¡u nÅu trÅn kháng ½õìc chöa d·u trong b¶t kü khoang n¡o n±m ê phÏa trõèc m´t c°t ngang vuáng gÜc vèi ½õéng tµm t¡u ½õìc bâ trÏ gi¨ ½Ùnh nhõ l¡ vŸch châng va ½¬ ½õìc bâ trÏ phï hìp vèi qui ½Ùnh trÅn.

3.3 Bâ trÏ thiÆt bÙ v¡ hÎ thâng ½õéng âng 3.3.1 HÎ thâng lõu giù d·u trÅn t¡u

1 T¡u d·u cÜ täng dung tÏch t÷ 150 trê lÅn phï ½õìc trang bÙ hÎ thâng l¡m vÎ sinh k¾t h¡ng thÏch hìp.

2 T¡u d·u cÜ täng dung tÏch nhÞ hçn 150 phï cÜ hÎ thâng lõu giù hån hìp d·u trÅn t¡u ½Ì x¨ v¡o cŸc phõçng tiÎn tiÆp nhºn. Tuy nhiÅn, nÆu cŸc phõçng tiÎn thï d·u ½¬ ½õìc l°p ½´t trÅn t¡u thÞa m¬n yÅu c·u 3.3, thÖ qui ½Ùnh n¡y cÜ thÌ ½õìc miÍn gi¨m.

3 T¡u d·u cÜ täng dung tÏch t÷ 150 trê lÅn phï bâ trÏ Ït nh¶t mæt k¾t l°ng cÜ dung tÏch c·n thiÆt ½ð ½Ì giù l−i bïn, cń d·u v¡ cń nõèc d±n b¸n do røa k¾t, thÞa m¬n cŸc qui ½Ùnh ê 3.3.1-4 ½Æn 3.3.1-8 sau ½µy v¡ cŸc t¡u d·u tràng tï to¡n ph·n trÅn 70.000 t¶n phï ½õìc bâ trÏ Ït nh¶t 2 k¾t l°ng. Täng dung tÏch cŸc k¾t l°ng, tr÷ cŸc trõéng hìp ½õìc nÅu ê (1) ½Æn (3), phï kháng dõèi 3% dung tÏch chê d·u cða t¡u :

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(1) Täng dung tÏch k¾t l°ng cða b¶t kü t¡u d·u n¡o khi lõìng nõèc røa k¾t ½õìc tºp trung trong mæt hoć cŸc k¾t l°ng phï ½ð ½Ì thúc hiÎn røa k¾t nhiËu l·n m¡ kháng phï l¶y thÅm nõèc, cÜ mæt ½·u phun v¡ mæt thiÆt bÙ røa k¾t cÜ kh¨ n¯ng cung c¶p ½ð sâ lõìng ch¶t lÞng d¹n ½æng ½·u phun, phï kháng dõèi 2%.

(2) Täng dung tÏch k¾t l°ng cða b¶t kü t¡u d·u n¡o ½õìc trang bÙ k¾t d±n cŸch ly thÞa m¬n qui ½Ùnh 3.2.3 hoć b¶t kü t¡u d·u n¡o ½õìc trang bÙ hÎ thâng røa b±ng d·u thá thÞa m¬n qui ½Ùnh 3.4 phï kháng dõèi 2%. Tuy nhiÅn, täng dung tÏch cða k¾t l°ng khi lõìng nõèc røa k¾t ½õìc tºp trung trong mæt hoć cŸc k¾t l°ng ½ð ½Ì thúc hiÎn røa k¾t nhiËu l·n m¡ kháng phï l¶y thÅm nõèc, cÜ mæt ½·u phun v¡ thiÆt bÙ røa k¾t cÜ kh¨ n¯ng cung c¶p ½ð lõìng ch¶t lÞng d¹n ½æng ½·u phun, cÜ thÌ ½õìc gi¨m ½Æn kháng dõèi 1,5%.

(3) Täng dung tÏch k¾t l°ng cða b¶t kü t¡u chê h¡ng hån hìp n¡o khi d·u h¡ng ch× ½õìc chöa trong cŸc k¾t cÜ vŸch ph²ng phï kháng dõèi 1%.

Tuy nhiÅn, täng dung tÏch cða k¾t l°ng khi lõìng nõèc røa k¾t ½õìc tºp trung trong mæt hoć cŸc k¾t l°ng ½ð ½Ì thúc hiÎn røa k¾t nhiËu l·n m¡ kháng phï l¶y thÅm nõèc, cÜ mæt ½·u phun v¡ mæt thiÆt bÙ røa k¾t cÜ kh¨ n¯ng cung c¶p ½ð lõìng ch¶t lÞng d¹n ½æng ½·u phun, cÜ thÌ ½õìc gi¨m ½Æn kháng dõèi 0,8%.

4 CŸc k¾t l°ng phï ½õìc thiÆt kÆ sao cho viÎc bâ trÏ cŸc cøa ra, cøa v¡o, cŸc vŸch ng¯n v¡ t¶m ch°n trŸnh t−o dÝng xoŸy ½Ì d·u hoć nhñ tõçng cða d·u chÿ ra theo nõèc.

5 Phï trang bÙ ½ð phõçng tiÎn ½Ì l¡m vÎ sinh cŸc k¾t h¡ng v¡ vºn chuyÌn cń nõèc d±n b¸n v¡ nõèc røa k¾t t÷ cŸc k¾t h¡ng v¡o k¾t l°ng.

6 K¾t l°ng phï ½õìc trang bÙ hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u ½âi vèi nõèc d±n, cÜ ½ć tÏnh sau ½µy, v¡ phï ½õìc ‡¯ng kiÌm x¾t duyÎt.

(1) CÜ mæt thiÆt bÙ ghi ½õìc hìp th¡nh trong hÎ thâng ½Ì ghi liÅn tòc viÎc x¨ tÏnh b±ng lÏt trÅn 1 hï lû v¡ täng sâ lõìng ½¬ x¨, hoć ghi h¡m lõìng d·u v¡ cõéng ½æ x¨.

(2) ViÎc ghi ½õìc nÜi ½Æn ê (1) phï cÜ thÌ nhºn biÆt ½õìc gié v¡ ng¡y.

(3) HÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u phï ho−t ½æng ngay khi cÜ b¶t kü viÎc x¨ n¡o ra biÌn.

(4) HÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u phï cÜ thiÆt bÙ bŸo ½æng ho−t ½æng b±ng tÏn hiÎu Ÿnh sŸng v¡ µm thanh khi cõéng ½æ x¨ d·u töc théi võìt quŸ 30 lÏt trÅn 1 hï lû, khi täng sâ lõìng ½õìc x¨ ra biÌn võìt quŸ 1/30.000 täng sâ lõìng h¡ng ½¬ t−o th¡nh mæt ph·n hån hìp d·u ½ang nÜi ½Æn hoć khi xÿ ra hõ hÞng hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u.

(5) ‡âi vèi cŸc t¡u cÜ täng dung tÏch t÷ 4000 trê lÅn, b¶t kü viÎc x¨ hån hìp d·u n¡o phï tú ½æng ng÷ng khi thiÆt bÙ bŸo ½æng phŸt tÏn hiÎu.

(6) Phï cÜ biÎn phŸp khêi ½æng b±ng tay v¡ cÜ thÌ sø dòng ½õìc trong trõéng hìp hõ hÞng hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u.

7 Phï trang bÙ cŸc thiÆt bÙ xŸc ½Ùnh ranh gièi d·u/nõèc cÜ hiÎu qu¨ ½õìc ‡¯ng kiÌm cho l¡ phï hìp ½Ì xŸc ½Ùnh chÏnh xŸc m´t phµn cŸch d·u/ nõèc trong cŸc k¾t l°ng v¡ trong cŸc k¾t khŸc m¡ t÷ ½Ü cń b¸n v¡ dÝng chÿ x¨ trúc tiÆp ra biÌn.

8 CŸc t¡u phï ½õìc trang bÙ mæt t¡i liÎu hõèng d¹n vºn h¡nh hÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u cho k¾t d±n. T¡i liÎu hõèng d¹n phï ½õìc ‡¯ng kiÌm ch¶p nhºn.

9 CŸc qui ½Ùnh ê 3.3.1-3 ½Æn 3.3.1-8 trÅn kháng Ÿp dòng cho cŸc t¡u d·u chê nhúa ½õéng hoć cŸc s¨n ph¸m hÜa d·u khŸc phï Ÿp dòng cŸc qui ½Ùnh cða Ph·n n¡y Qui ph−m, nhõng khÜ tŸch nõèc khÞi cŸc s¨n ph¸m d·u mÞ ½Ü bêi cŸc tÏnh ch¶t vºt lû cða chîng. Trong trõéng hìp n¡y, cŸc t¡u d·u phï ½õìc trang bÙ hÎ thâng lõu giù hån hìp d·u trÅn t¡u ½Ì sau ½Ü x¨ v¡o phõçng tiÎn tiÆp nhºn.

10 ‡âi vèi b¶t kü t¡u d·u n¡o ch× ho−t ½æng trong ph−m vi cŸch bé kháng quŸ 50 hï lû tÏnh t÷ ½õéng cç sê kháng phï Ÿp dòng cŸc qui ½Ùnh ê 3.3.1-6 ½Æn 3.3.1-8 vèi ½iËu kiÎn ‡¯ng kiÌm x¾t th¶y kÆ ho−ch ho−t ½æng cða t¡u l¡ phï hìp.

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3.3.2 HÎ thâng thï d·u

1 TrÅn måi t¡u d·u, phï l°p ½´t trÅn boong hê ê c¨ hai bÅn m−n t¡u ½õéng âng x¨ cÜ bÏch nâi tiÅu chu¸n ½Ì nâi v¡o phõçng tiÎn tiÆp nhºn nh±m x¨ nõèc d±n b¸n hoć nõèc l¹n d·u.

2 TrÅn måi t¡u d·u, cŸc ½õéng âng ½Ì x¨ ra biÌn nõèc d±n hoć nõèc l¹n d·u trong cŸc khoang h¡ng phï ½õìc d¹n ½Æn boong hê hoć ½Æn m−n t¡u phÏa trÅn ½õéng nõèc ê tr−ng thŸi d±n sµu nh¶t. Tuy nhiÅn, cŸc trõéng hìp sau ½µy ½õìc miÍn gi¨m : (1) CŸc ½õéng âng ½Ì x¨ nõèc d±n cŸch ly v¡ nõèc d±n s−ch nÆu cÜ trang bÙ cŸc phõçng tiÎn ½Ì kiÌm tra bË m´t cða nõèc d±n ngay trõèc khi x¨, v¡ viÎc x¨ ½õìc thúc hiÎn trong ph−m vi vïng c¨ng hoć khu vúc neo t¡u, hoć ½õìc x¨ ngo¡i khçi ch× b±ng phõçng phŸp tràng lúc.

(2) CŸc ½õéng âng x¨ nõèc d±n cŸch ly v¡ nõèc d±n s−ch nÆu cÜ trang bÙ thiÆt bÙ xŸc ½Ùnh ranh gièi d·u/ nõèc cÜ kh¨ n¯ng kiÌm tra nõèc d±n ngay trõèc khi x¨ nhõ ½õìc nÅu ê 3.3.1-7, v¡ ½õìc x¨ ra biÌn ch× b±ng phõçng phŸp tràng lúc. Tuy nhiÅn, ngay c¨ trong trõéng hìp n¡y cŸc ½õéng âng ½Ì x¨ t÷ cŸc k¾t l°ng phï ½õìc d¹n ½Æn boong hê hoć m−n t¡u phÏa trÅn ½õéng nõèc ê tr−ng thŸi d±n sµu nh¶t.

3 Phï trang bÙ phõçng tiÎn ½Ì ng÷ng viÎc x¨ ra biÌn t÷ mæt vÙ trÏ quan sŸt ê boong thõìng t·ng hoć cao hçn v¡ bâ trÏ sao cho cÜ thÌ quan sŸt ½õìc b±ng m°t ½õéng âng cÜ bÏch nâi tiÅu chu¸n ½õìc sø dòng nÅu ê 3.3.2-1 v¡ nõèc x¨ ra t÷ ½õéng âng ½õìc nÜi ½Æn ê 3.3.2-2. Kháng c·n trang bÙ phõçng tiÎn ½Ì ng÷ng x¨ ê vÙ trÏ quan sŸt nÆu cÜ mæt hÎ thâng liÅn l−c chð ½æng nhõ hÎ thâng ½iÎn tho−i hoć vá tuyÆn ½iÎn giùa vÙ trÏ quan sŸt v¡ vÙ trÏ kiÌm soŸt x¨.

4 Bä sung v¡o cŸc qui ½Ùnh ½õìc nÅu ê 3.3.1-1 ½Æn 3.3.1-3 trÅn, t¡u chê d·u thá cÜ tràng tï to¡n ph·n t÷ 20.000 t¶n trê lÅn v¡ cŸc t¡u chê d·u thõçng ph¸m cÜ tràng tï to¡n ph·n t÷ 30.000 t¶n trê lÅn phï ½õìc trang bÙ cŸc hÎ thâng x¨ nhõ ½õìc nÅu ê (1) v¡ (2) sau ½µy :

(1) CŸc ½õéng âng d·u h¡ng phï ½õìc bâ trÏ sao cho lõìng cń d·u cÝn l−i trong ½õéng âng l¡ nhÞ nh¶t.

(2) Phï trang bÙ cŸc phõçng tiÎn ½Ì cń d·u cÝn l−i trong bçm h¡ng v¡ cŸc ½õéng âng d·u h¡ng sau khi x¨ h¡ng cÜ thÌ ½õìc rît hÆt hoć ½õìc rît ra nhé nâi chîng vèi ½õéng âng thŸo hoć phõçng tiÎn cÜ hiÎu qu¨ khŸc. ‡âi vèi cń d·u, phï trang bÙ cŸc ½õéng âng vèi ½õéng kÏnh nhÞ riÅng biÎt ê bÅn ngo¡i t¡u nâi vèi còm âng vºn chuyÌn lÅn bé ½Ì chuyÌn chîng ½Æn cŸc k¾t d·u hoć cŸc k¾t l°ng, cñng nhõ lÅn phõçng tiÎn tiÆp nhºn trÅn bé. TiÆt diÎn cða cŸc âng ½õéng kÏnh nhÞ phï kháng quŸ 10% tiÆt diÎn cða cŸc ½õéng âng x¨ h¡ng chÏnh.

3.4 HÎ thâng røa b±ng d·u thá 3.4.1 CŸc qui ½Ùnh vË l°p ½´t

CŸc t¡u chê d·u thá cÜ tràng tï to¡n ph·n t÷ 20.000 t¶n trê lÅn phï ½õìc trang bÙ nhõ sau :

(1) HÎ thâng røa b±ng d·u thá thÞa m¬n cŸc qui ½Ùnh ê 3.4.

(2) HÎ thâng khÏ trç thÞa m¬n cŸc qui ½Ùnh cða TCVN 6259:2003 Qui ph−m Phµn c¶p v¡ ½Üng t¡u biÌn vÞ th¾p cho t¶t c¨ cŸc k¾t d·u h¡ng v¡ k¾t l°ng.

(3) T¡i liÎu hõèng d¹n qui trÖnh v¡ trang thiÆt bÙ má t¨ chi tiÆt hÎ thâng røa b±ng d·u thá v¡ ch× rß qui trÖnh vºn h¡nh, ½õìc ‡¯ng kiÌm ch¶p thuºn.

3.4.2 Bâ trÏ ½õéng âng cho hÎ thâng røa d·u thá

Bâ trÏ ½õéng âng d¹n cho hÎ thâng røa b±ng d·u thá phï thÞa m¬n cŸc qui ½Ùnh (1) ½Æn (9) sau ½µy :

(1) CŸc âng v¡ van røa d·u thá n±m trong hÎ thâng ½õéng âng cung c¶p phï ½õìc l¡m b±ng th¾p hoć vºt liÎu tõçng ½õçng cÜ ½ð ½æ bËn vèi Ÿp lúc l¡m viÎc lèn nh¶t, v¡ ½õìc nâi gh¾p v¡ gŸ ½ë mæt cŸch thÏch hìp.

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(2) CŸc ½õéng âng dïng cho hÎ thâng røa b±ng d·u thá phï câ ½Ùnh v¡ ½æc lºp vèi âng cöu hÞa hoć cŸc hÎ thâng âng d¹n kháng phï ½õéng âng røa b±ng d·u thá. Tuy nhiÅn, mæt bæ phºn ½õéng âng d·u h¡ng cða t¡u cÜ thÌ ½õìc dïng chung vèi ½õéng âng røa b±ng d·u thá khi ½õìc ‡¯ng kiÌm ch¶p thuºn.

‡âi vèi cŸc t¡u chê h¡ng hån hìp ½ang chê h¡ng kháng phï l¡ ch¶t lÞng, cŸc ½õéng âng røa b±ng d·u thá cÜ thÌ ½õìc thŸo ra khi c·n thiÆt, nhõng khi ½õìc dïng l−i, chîng phï ½õìc l°p bö ½¨m kÏn d·u. Khi c·n thiÆt phï trang bÙ thiÆt bÙ røa k¾t g°n ê n°p miÎng h·m h¡ng, thÖ phï sø dòng mæt âng mËm ½Ì nâi hÎ thâng røa b±ng d·u thá vèi thiÆt bÙ røa k¾t ½Ü. âng mËm phï l¡ kiÌu nâi b±ng bÏch ½õìc ‡¯ng kiÌm ch¶p thuºn. ChiËu d¡i cða âng kháng ½õìc võìt quŸ chiËu d¡i c·n thiÆt ½Ì nâi th²ng thiÆt bÙ røa k¾t vèi mæt vÙ trÏ ½Üng kÏn phÏa ngo¡i gé miÎng k¾t. Phï bâ trÏ mæt khu vúc ½Ì c¶t giù cho cŸc âng mËm n¡y khi chîng chõa ½õìc sø dòng ½Æn.

(3) CŸc ½õéng âng cung c¶p ½Ì røa k¾t phï ½õìc trang bÙ cŸc thiÆt bÙ ½Ì bö vÎ sú quŸ Ÿp. Lõìng d·u tr¡n qua thiÆt bÙ an to¡n ½õìc trang bÙ ½Ì bö vÎ quŸ Ÿp phï ½õìc d¹n ½Æn ½·u hît cða bçm c¶p.

(4) Khi hÎ thâng røa k¾t ½õìc l°p mæt van c¶p nõèc ½Ì røa b±ng nõèc, thÖ van n¡y phï ½ð bËn, v¡ nÆu ½õéng d·u thá c¶p v¡o hÎ thâng giâng nhõ vºy, thÖ phï trang bÙ cŸc phõçng tiÎn ½Ì ½Üng bæ phºn ½õìc nâi vèi nhau b±ng sø dòng mæt bÏch ½ć.

(5) Khi hÎ thâng ½õéng âng ½õìc l°p cŸc Ÿp kÆ hoć cŸc dòng cò khŸc, phï trang bÙ mæt van khÜa g·n cŸc dòng cò ½Ü hoć cŸc dòng cò ½Ü phï l¡ lo−i ½õìc thiÆt kÆ cÜ kh¨ n¯ng tú ½Üng kÏn.

(6) Kháng bæ phºn n¡o cða hÎ thâng røa b±ng d·u thá ½õìc bâ trÏ trong buãng mŸy. NÆu trang bÙ b·u hµm nõèc røa dïng hçi cho hÎ thâng røa k¾t, thÖ thiÆt bÙ n¡y phï ½õìc ng°t cÜ hiÎu qu¨ b±ng mæt van ½Üng k¾p hoć mæt bÏch ½ć cÜ thÌ nhºn biÆt dÍ d¡ng.

(7) Khi trang bÙ ½õéng âng cung c¶p dïng chung cho røa b±ng d·u thá v¡ røa b±ng nõèc thÖ phï ½õìc thiÆt kÆ sao cho chîng cÜ thÌ thŸo hÆt d·u v¡o k¾t l°ng hoć cŸc khoang h¡ng khŸc ½Æn möc cÜ thÌ thúc hiÎn ½õìc trõèc khi b°t ½·u røa b±ng nõèc.

(8) CŸc ½õéng âng phï cÜ ½õéng kÏnh ½ð ½Ì vºn h¡nh cïng lîc sâ lõìng lèn nh¶t cŸc thiÆt bÙ røa k¾t ê Ÿp su¶t thiÆt kÆ v¡ cõéng ½æ x¨ ½¬ nÅu ê t¡i liÎu hõèng d¹n vºn h¡nh cða thiÆt bÙ. CŸc ½õéng âng phï ½õìc bâ trÏ sao cho sâ lõìng thiÆt bÙ røa k¾t c·n thiÆt ½¬ yÅu c·u ½âi vèi cŸc khoang h¡ng riÅng lÀ cÜ thÌ ho−t ½æng cïng lîc.

(9) CŸc ½õéng âng cung c¶p røa b±ng d·u thá phï ½õìc b°t ch´t vèi vÞ t¡u ê cŸc vÙ trÏ thÏch hìp, v¡ phï cÜ cŸc biÎn phŸp ½Ì cho ph¾p gi¬n nê nhiÎt v¡ dÙch chuyÌn tú do theo sú biÆn d−ng cða kÆt c¶u thµn t¡u. Phõçng phŸp câ ½Ùnh cŸc ½õéng âng cung c¶p phï sao cho sú va ½ºp thðy ½æng cÜ thÌ ½õìc triÎt tiÅu m¡ kháng l¡m dÙch chuyÌn ½õéng âng d¹n ½Æn möc ½æ cÜ thÌ nhºn th¶y. CŸc vÙ trÏ câ ½Ùnh ½õéng âng phï cŸch xa nh¶t cŸc vÙ trÏ c¶p d·u thá cho cŸc ½õéng âng. Khi mæt thiÆt bÙ røa k¾t ½õìc dïng ½Ì câ ½Ùnh ½·u âng nhŸnh, phï trang bÙ cŸc phõçng tiÎn ½ć biÎt ½Ì câ ½Ùnh ph·n âng ½Ü khi thiÆt bÙ røa k¾t bÙ xÅ dÙch.

3.4.3 ThiÆt bÙ røa b±ng d·u thá

ThiÆt bÙ røa b±ng d·u thá phï thÞa m¬n cŸc qui ½Ùnh (1) ½Æn (7) dõèi ½µy :

(1) CŸc thiÆt bÙ røa k¾t b±ng d·u thá phï ½õìc ½´t câ ½Ùnh, v¡ cÜ thiÆt kÆ ½õìc ‡¯ng kiÌm ch¶p thuºn.

(2) CŸc ½ć tÏnh kþ thuºt cða thiÆt bÙ røa k¾t phï ½õìc xŸc ½Ùnh b±ng ½õéng kÏnh vÝi phun, Ÿp su¶t l¡m viÎc, phõçng thöc v¡ chu kü ho−t ½æng. CŸc thiÆt bÙ røa k¾t riÅng lÀ phï cÜ cŸc ½ć tÏnh sao cho ½ð kh¨ n¯ng ½Ì røa cÜ hiÎu qu¨ cŸc k¾t h¡ng ½õìc thiÆt bÙ røa n¡y phòc vò trong théi gian ½õìc ½Ùnh rß trong t¡i liÎu hõèng d¹n vºn h¡nh v¡ trang thiÆt bÙ.

(3) CŸc thiÆt bÙ røa k¾t phï ½õìc ½´t trong cŸc k¾t h¡ng riÅng biÎt, v¡ phõçng phŸp gŸ l°p phï thÞa m¬n cŸc yÅu c·u cða ‡¯ng kiÌm. Khi thiÆt bÙ røa k¾t ½õìc ½´t ê cŸc vÙ trÏ th¶p hçn ½õéng v−ch ½¬ ½õìc lõu û bÅn dõèi boong vÖ lû do cŸc ph·n nhá kÆt c¶u trong k¾t, thÖ phï xem x¾t viÎc trang bÙ cŸc giŸ ½ë ½ć biÎt cho cŸc thiÆt bÙ røa k¾t v¡ cŸc ½õéng âng cung c¶p.

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(4) CŸc thiÆt bÙ røa k¾t riÅng biÎt phï cÜ kh¨ n¯ng ng°t b±ng van khÜa ½õìc ½´t trÅn ½õéng âng cung c¶p. Khi thiÆt bÙ røa k¾t l°p trÅn boong ½õìc thŸo ra vÖ lû do n¡o ½Ü, phï cÜ cŸc biÎn phŸp ½Ì ng°t ½õéng âng c¶p d·u d¹n ½Æn thiÆt bÙ ½Ü. Cñng tõçng tú, phï trang bÙ mæt phõçng tiÎn thÏch hìp ½Ì ½Üng miÎng k¾t h¡ng b±ng mæt t¶m kim lo−i hoć b±ng cŸc phõçng tiÎn phï hìp khŸc ½õìc ‡¯ng kiÌm ch¶p nhºn.

(5) Khi bæ phºn d¹n ½æng kháng hìp th¡nh trong thiÆt bÙ røa k¾t, thÖ phï trang bÙ ½ð sâ lõìng thiÆt bÙ røa k¾t ½Ì b¶t kü thiÆt bÙ røa k¾t n¡o cñng kháng c·n phï di chuyÌn khÞi vÙ trÏ l°p ½´t chÏnh 3 l·n trê lÅn trong khi ho−t ½æng røa k¾t ½Ì ½−t ½õìc chõçng trÖnh røa k¾t ½¬ nÅu trong cŸc t¡i liÎu hõèng d¹n vºn h¡nh v¡ trang thiÆt bÙ.

(6) Sâ lõìng v¡ vÙ trÏ cða cŸc thiÆt bÙ røa k¾t phï sao cho ½¨m bö r±ng t¶t c¨ cŸc bË m´t th²ng ½öng v¡ t¶t c¨ cŸc bË m´t n±m ngang cÜ thÌ ½õìc røa b±ng cŸch phun trúc tiÆp, hoć viÎc røa k¾t ½−t hiÎu qu¨ b±ng tia phun ph¨n x−. ‡Ì ½Ÿnh giŸ hiÎu qu¨ cða tia phun ph¨n x−, phï chî û ½ć biÎt ½Æn viÎc røa cŸc bË m´t n±m ngang phÏa trÅn, v¡ cŸc tháng sâ sau ½µy : (a) ‡âi vèi cŸc m´t n±m ngang cða ½Ÿy k¾t v¡ m´t trÅn cða cŸc th¡nh ph·n kÆt c¶u thµn t¡u chÏnh lèn

nhõ cŸc d·m dàc trong k¾t, täng cŸc diÎn tÏch v¡ viÎc phun trúc tiÆp trê ng−i ½âi vèi cŸc boong, sâng dàc ½Ÿy, cŸc d·m chÏnh v¡ d·m dàc hoć cŸc th¡nh ph·n kÆt c¶u thµn t¡u lèn khŸc tõçng tú, phï kháng võìt quŸ 10% täng cŸc diÎn tÏch bË m´t n±m ngang cða ½Ÿy k¾t, v¡ cŸc bË m´t trÅn cða d·m dàc v¡ cŸc th¡nh ph·n kÆt c¶u thµn t¡u chÏnh lèn khŸc.

(b) ‡âi vèi cŸc bË m´t th²ng ½öng cða cŸc vŸch m−n cða k¾t, täng cŸc diÎn tÏch do viÎc phun trúc tiÆp bÙ trê ng−i bêi cŸc boong, cŸc sâng ½Ÿy, cŸc d·m chÏnh v¡ cŸc d·m dàc hoć cŸc th¡nh ph·n kÆt c¶u thµn t¡u chÏnh lèn khŸc kháng võìt quŸ 15% täng diÎn tÏch cŸc vŸch m−n cða k¾t. C·n phï lõu û ½Æn trang bÙ t÷ 2 lo−i thiÆt bÙ røa k¾t trê lÅn ½Ì ½−t ½õìc kÆt qu¨ røa k¾t ½·y ½ð tïy thuæc v¡o sú bâ trÏ cŸc th¡nh ph·n kÆt c¶u trong k¾t.

(7) KÆt c¶u cða cŸc thiÆt bÙ røa k¾t ½õìc l°p ½´t bÅn trong phï sao cho ½õìc trang bÙ cŸc phõçng tiÎn ½Ì ch× bŸo tâc ½æ quay v¡ chuyÌn ½æng hÖnh cung cða thiÆt bÙ ê bÅn ngo¡i k¾t h¡ng.

3.4.4 Bçm phòc vò hÎ thâng røa b±ng d·u thá

CŸc bçm cung c¶p d·u thá cho thiÆt bÙ røa k¾t phï thÞa m¬n cŸc qui ½Ùnh ê (1) ½Æn (5) dõèi ½µy :

(1) CŸc bçm cung c¶p d·u thá cho thiÆt bÙ røa k¾t phï hoć l¡ bçm d·u h¡ng hoć l¡ cŸc bçm ½õìc trang bÙ d¡nh riÅng cho mòc ½Ïch n¡y.

(2) S¨n lõìng bçm phï sao cho sâ lõìng nhiËu nh¶t cða cŸc thiÆt bÙ røa k¾t ½õìc nÅu trong b¨n hõèng d¹n vºn h¡nh v¡ trang thiÆt bÙ cÜ thÌ ho−t ½æng ê Ÿp su¶t ½¬ ½Ùnh cïng vèi cõéng ½æ x¨. Khi cÜ trang bÙ ½·u phun dïng ½Ì t¸y cń, thÖ bçm phï cÜ kh¨ n¯ng cung c¶p ch¶t lÞng d¹n ½æng ½·u phun ½ð thÞa m¬n yÅu c·u ê 3.4.5 (2).

(3) S¨n lõìng cða bçm phï sao cho qui ½Ùnh ½õìc nÅu ê (2) cÜ thÌ ½õìc thÞa m¬n ngay c¨ khi mæt bçm bÙ hÞng. Sú bâ trÏ bçm v¡ ½õéng âng phï sao cho hÎ thâng røa b±ng d·u thá thúc hiÎn ½·y ½ð chöc n¯ng ngay c¨ trong trõéng hìp mæt bçm bÙ hÞng.

(4) HÎ thâng phï cÜ kh¨ n¯ng thúc hiÎn røa cŸc k¾t b±ng d·u thá ngay c¨ khi cÜ hai lo−i h¡ng khŸc nhau hoć nhiËu hçn ½õìc chê trÅn t¡u.

(5) Phï cÜ cŸc biÎn phŸp sao cho thiÆt bÙ røa cÜ thÌ duy trÖ ½ð Ÿp su¶t theo (2) ½Ì tiÆn h¡nh cÜ hiÎu qu¨ viÎc røa b±ng d·u thá ngay c¨ trong trõéng hìp Ÿp lúc c¨n phŸt sinh t−i thiÆt bÙ tiÆp nhºn trÅn bé th¶p hçn Ÿp lúc c¨n c·n cÜ cho viÎc røa b±ng d·u thá. Ÿp su¶t c¶p nhÞ nh¶t c·n cho røa b±ng d·u thá phï ½õìc ½Ùnh rß trong b¨n hõèng d¹n vºn h¡nh v¡ trang thiÆt bÙ.

3.4.5 HÎ thâng t¸y cń

HÎ thâng t¸y cń phï thÞa m¬n cŸc qui ½Ùnh (1) ½Æn (7) sau ½µy :

(1) KÆt c¶u cða t¶t c¨ cŸc hÎ thâng ½Ì t¸y d·u thá khÞi ½Ÿy k¾t d·u h¡ng phï thÞa m¬n cŸc yÅu c·u cða ‡¯ng kiÌm.

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(2) KÆt c¶u v¡ cáng su¶t cða hÎ thâng t¸y phï sao cho kháng cÜ d·u v¡ cń cÝn ½àng l−i trÅn ½Ÿy k¾t khi ho¡n th¡nh røa k¾t.

(3) Cáng su¶t cða hÎ thâng t¸y phï sao cho b±ng 1,25 l·n täng sâ lõìng x¨ bêi t¶t c¨ cŸc thiÆt bÙ røa k¾t ho−t ½æng cïng lîc cÜ thÌ xÿ ra khi cáng viÎc røa k¾t ½õìc tiÆn h¡nh trÅn ½Ÿy cŸc k¾t h¡ng ½¬ ½Ùnh rß trong b¨n hõèng d¹n vºn h¡nh v¡ trang thiÆt bÙ.

(4) ‡Ì kiÌm tra xem ½Ÿy k¾t h¡ng ½¬ khá chõa sau khi røa b±ng d·u thá, phï trang bÙ cŸc phõçng tiÎn nhõ dòng cò ½o möc ch¶t lÞng, thiÆt bÙ dÝ b±ng tay, dòng cò xŸc ½Ùnh hiÎu qu¨ cáng viÎc cho hÎ thâng t¸y ½õìc nÜi ½Æn ê (6). Khi kháng cÜ ½ð phõçng tiÎn ½õìc ch¶p nhºn ½Ì xŸc nhºn r±ng ½Ÿy k¾t h¡ng l¡ khá, thÖ phï trang bÙ cŸc phõçng tiÎn ½Ì dÝ b±ng tay t−i 3 vÙ trÏ bao gãm c¨ ph·n k¾t h¡ng ê ½uái t¡u v¡ cŸc vÙ trÏ thÏch hìp khŸc. Thuºt ngù "khá" ê ½µy cÜ nghØa l¡ ngay c¨ vïng lµn cºn miÎng hît khá cñng ch× cÜ mæt lõìng nhÞ d·u, cÝn cŸc vïng khŸc nÜi chung ê tr−ng thŸi khá.

(5) ‡Ì t¸y d·u khÞi cŸc k¾t d·u h¡ng, phï sø dòng cŸc bçm di ½æng, bçm ly tµm kiÌu tú mãi, mŸy phun hoć cŸc bçm khŸc thÞa m¬n yÅu c·u cða ‡¯ng kiÌm. Khi cŸc ½õéng âng t¸y ½õìc nâi vèi nhiËu k¾t, phï trang bÙ cŸc phõçng tiÎn ½Ì ng°t riÅng cŸc k¾t m¡ nÜ kháng ½õìc t¸y.

(6) Phï trang bÙ mæt hÎ thâng kiÌm tra ½Ì kiÌm tra hiÎu qu¨ cða hÎ thâng t¸y. Bæ kiÌm tra phï ½õìc bâ trÏ trong buãng kiÌm soŸt h¡ng, an to¡n, cÜ thÌ tiÆp cºn ½õìc v¡ ê cŸc chå thuºn tiÎn cho nhµn viÅn ½öng trúc, v¡ cÜ thÌ biÌu thÙ b±ng dòng cò ch× bŸo t÷ xa. Khi trang bÙ cŸc bçm t¸y, thÖ phï trang bÙ hoć mæt lõu lõìng kÆ, h¡nh trÖnh kÆ hoć tâc ½æ kÆ nhõ mæt thiÆt bÙ kiÌm tra, v¡ mæt Ÿp kÆ hoć thiÆt bÙ lúa chàn tõçng ½õçng phï ½õìc l°p t−i ½·u nâi âng x¨ cða bçm. Khi trang bÙ cŸc mŸy phun, thÖ phï ½´t cŸc Ÿp kÆ t−i ½·u hît v¡ ½·u x¨ ch¶t lÞng d¹n ½æng mŸy phun, v¡ phï l°p dòng cò ½o hån hìp t−i ½·u hît cða mŸy phun nhõ mæt dòng cò kiÌm tra.

(7) KÆt c¶u bÅn trong k¾t phï sao cho r¬nh d·u cða hÎ thâng t¸y ½Æn giÆng hît cða k¾t thÞa m¬n cŸc qui ½Ùnh ê (2) v¡ (4).

3.4.6 Bâ trÏ k¾t d±n

NÆu kháng cÜ cŸc k¾t d±n ½æc lºp m¡ phï sø dòng k¾t h¡ng ½Ì d±n, thÖ phï trang bÙ cŸc phõçng tiÎn ½Ì hît khá d·u mæt cŸch an to¡n v¡ hiÎu qu¨ khÞi âng gÜp cða bçm v¡ ½õéng âng l¡m d·u, trõèc khi b°t ½·u d±n.

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chõçng 4 nhùng quy ½Ùnh cho giai ½o−n quŸ ½æ


1 Nhùng qui ½Ùnh trong Chõçng n¡y Ÿp dòng cho kÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u cða cŸc t¡u cÜ sâng chÏnh ½õìc ½´t trõèc ng¡y 25.8.1983 m¡ t¡u ½¬ ½õìc ½¯ng kû hoć dú ½Ùnh ½¯ng kû t−i ‡¯ng kiÌm, tr÷ khi ½õìc quy ½Ùnh khŸc ½i nÅu ê -3 sau ½µy.

2 CŸc t¡u thuæc ph−m vi Ÿp dòng cða Chõçng n¡y phï thÞa m¬n yÅu c·u cða Chõçng 1, Chõçng 2 v¡ Chõçng 3 phï hìp vèi B¨ng 3-9.

3 CŸc t¡u d·u cÜ tràng tï to¡n ph·n t÷ 5000 t¶n trê lÅn, m¡ t¡u n¡y ½¬ ½õìc ½Üng, hoć sâng chÏnh cða t¡u ½¬ ½õìc ½´t, hoć t¡u ½¬ ½õìc b¡n giao trõèc théi ½iÌm nÅu ê 3.1.1-2, phï tho¨ m¬n theo cŸc quy ½Ùnh cða 4.3.10. Tuy nhiÅn, cŸc quy ½Ùnh n¡y kháng c·n thiÆt phï Ÿp dòng ½âi vèi cŸc t¡u d·u sau ½µy:

(1) T¡u d·u tho¨ m¬n cŸc quy ½Ùnh nÅu ê 3.2.4.

(2) T¡u d·u tho¨ m¬n cŸc quy ½Ùnh nÅu ê 3.2.4(1)(a)(i) v¡ (ii) hoć 3.2.4(1)(b)(i),(ii) v¡ (iii) hoć 3.2.4(1)(c). Trong trõéng hìp n¡y, kho¨ng cŸch bö vÎ m−n v¡ ½Ÿy phï tho¨ m¬n quy ½Ùnh tõçng öng nÅu ê 2.6.1(2) v¡ 3.2.3(2)(c) cða TCVN 6259-8E:2003 T¡u chê xá hoŸ ch¶t nguy hiÌm.

4.1.2 ‡Ùnh nghØa

Trong Chõçng n¡y sø dòng cŸc ½Ùnh nghØa sau ½µy :

(1) T¡u kháng phï l¡ t¡u d·u (a) "T¡u N" l¡ mæt t¡u ½õìc liÎt v¡o mæt trong cŸc trõéng hìp t÷ (i) ½Æn (iii) sau ½µy :

(i) CÜ hìp ½ãng ½Üng mèi kû sau ng¡y 31.12.1975, hoć kháng cÜ hìp ½ãng ½Üng mèi nhõng sâng chÏnh ½õìc ½´t sau ng¡y 30.6.1976 ; hoć

(ii) ‡õìc b¡n giao sau ng¡y 31.12.1979 ; hoć (iii) ‡õìc hoŸn cï lèn theo mæt trong cŸc trõéng hìp sau :

1) Hìp ½ãng hoŸn cï ½õìc kû sau ng¡y 31.12.1975 ; hoć 2) Kháng cÜ hìp ½ãng hoŸn cï nhõng cáng viÎc hoŸn cï ½õìc b°t ½·u sau ng¡y 30.6.1976;

hoć 3) Ho¡n th¡nh hoŸn cï sau ng¡y 31.12.1979.

(b) "T¡u E" l¡ t¡u kháng phï l¡ "t¡u N".

(2) T¡u d·u (a) "T¡u NN" l¡ mæt t¡u ½õìc liÎt v¡o mæt trong cŸc trõéng hìp trõéng hìp (i) ½Æn (iii) sau ½µy :

(i) CÜ hìp ½ãng ½Üng mèi ½õìc kû sau ng¡y 1.6.1979, hoć kháng cÜ hìp ½ãng ½Üng nhõng sâng chÏnh ½õìc ½´t sau ng¡y 1.1.1980; hoć

(ii) ‡õìc b¡n giao sau ng¡y 1.1.1982; hoć (iii) ‡õìc hoŸn cï lèn theo mæt trong cŸc trõéng hìp sau ½µy : 1) Hìp ½ãng hoŸn cï ½õìc kû sau ng¡y 1.6.1982 ; hoć

2) Kháng cÜ hìp ½ãng hoŸn cï nhõng cáng viÎc hoŸn cï ½õìc b°t ½·u sau ng¡y 1.1.1980 ; hoć

3) Ho¡n th¡nh hoŸn cï sau ng¡y 1.6.1982. (b) "T¡u EN" l¡ mæt t¡u ½õìc liÎt v¡o mæt trong cŸc trõéng hìp t÷ (i) ½Æn (iv) sau :

(i) CÜ hìp ½ãng ½Üng mèi ½õìc kû v¡o giùa ng¡y 31.12.1975 v¡ ng¡y 1.6.1979 ; hoć (ii) Kháng cÜ hìp ½ãng ½Üng nhõng sâng chÏnh ½õìc ½õìc ½´t v¡o giùa ng¡y 30.6.1976 v¡ ng¡y

1.1.1980 ; hoć (iii) ‡õìc b¡n giao v¡o giùa ng¡y 31.12.1979 v¡ ng¡y 1.1.1982 ; hoć (iv) ‡õìc hoŸn cï lèn theo mæt trong cŸc trõéng hìp sau ½µy :

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1) Hìp ½ãng hoŸn cï ½õìc kû trong théi gian t÷ ng¡y 31.12.1975 v¡ ng¡y 1.6.1979 ; hoć 2) Kháng cÜ hìp ½ãng hoŸn cï nhõng cáng viÎc hoŸn cï ½õìc b°t ½·u trong théi gian t÷

ng¡y 30.1.1976 ½Æn ng¡y 1.1.1980 ; hoć 3) Ho¡n th¡nh hoŸn cï trong théi gian t÷ ng¡y 31.12.1979 ½Æn ng¡y 1.6.1982.

(c) "T¡u EE" l¡ t¡u kháng phï l¡ "t¡u NN" hoć "t¡u EN".

(3) "T¡u mèi" l¡ "t¡u N", "t¡u NN" v¡ "t¡u EN".

(4) "T¡u hiÎn cÜ" l¡ "t¡u E" v¡ "t¡u EE".

(5) (a) "HoŸn cï lèn" l¡ hoŸn cï thuæc v¡o mæt trong cŸc trõéng hìp t÷ (i) ½Æn (iv) sau ½µy : (i) L¡m thay ½äi ½Ÿng kÌ kÏch thõèc hoć tràng tï cða t¡u ; hoć (ii) L¡m thay ½äi kiÌu t¡u; hoć (iii) Chð yÆu nh±m k¾o d¡i ½Ÿng kÌ tuäi thà cða t¡u theo û kiÆn cða ‡¯ng kiÌm; hoć (iv) L¡m thay ½äi vèi hÖnh thöc khŸc tèi möc m¡ nÆu nÜ ½õìc coi l¡ mæt t¡u mèi, thÖ phï Ÿp dòng

cŸc qui ½Ùnh thÏch hìp cða Ph·n 1 chö kháng Ÿp dòng cŸc qui ½Ùnh cho t¡u hiÎn cÜ. (b) B¶t kÌ cŸc qui ½Ùnh ê (a) trÅn, viÎc hoŸn cï cŸc t¡u EE cÜ tràng tï to¡n ph·n 20.000 t¶n trê lÅn

nh±m thÞa m¬n cŸc qui ½Ùnh 3.2.3 v¡ 3.4.1 sÁ kháng ½õìc coi l¡ hoŸn cï lèn.

(6) “D·u ½i-Å-sel nńg” l¡ d·u ½i-Å-sel h¡ng hï, m¡ th¡nh ph·n cða nÜ khŸc vèi nhùng th¡nh ph·n chõng c¶t thu ½õìc lèn hçn 50% theo thÌ tÏch khi chõng c¶t ê nhiÎt ½æ kháng võìt quŸ 340 ½æ.

(7) “ D·u FO” l¡ cŸc th¡nh ph·n chõng c¶t nńg thu ½õìc hoć cń cÝn l−i khi chõng c¶t d·u thá hoć hån hìp cða cŸc nguyÅn liÎu n¡y dú ½Ùnh sø dòng l¡m nhiÅn liÎu ½ât t−o nhiÎt hoć n¯ng lõìng cÜ ½ć trõng tõçng ½õçng vèi cŸc ½ć tÏnh kþ thuºt ½õìc ‡¯ng kiÌm ch¶p nhºn.

(8) “ T¡u d·u lo−i 1” nghØa l¡ t¡u d·u cÜ tràng tï to¡n ph·n t÷ 20.000 t¶n trê lÅn dïng ½Ì chê d·u thá, d·u FO, d·u ½i-Å-sel nńg hoć d·u bái trçn l¡m h¡ng hoŸ, v¡ cÜ tràng tï t÷ 30.000 t¶n trê lÅn dïng ½Ì chê d·u kháng phï l¡ cŸc lo−i d·u nÅu trÅn m¡ t¡u n¡y kháng tho¨ m¬n cŸc quy ½Ùnh ½âi vèi t¡u NN.

(9) “ T¡u d·u lo−i 2” nghØa l¡ t¡u d·u cÜ tràng tï to¡n ph·n t÷ 20.000 t¶n trê lÅn dïng ½Ì chê d·u thá, d·u FO, d·u ½i-Å-sel nńg hoć d·u bái trçn l¡m h¡ng hoŸ, v¡ cÜ tràng tï t÷ 30.000 t¶n trê lÅn dïng ½Ì chê d·u kháng phï l¡ cŸc lo−i d·u nÅu trÅn, tho¨ m¬n cŸc quy ½Ùnh ½âi vèi t¡u NN.

(10) “ T¡u d·u lo−i 3” nghØa l¡ t¡u d·u cÜ tràng tï to¡n ph·n t÷ 5.000 t¶n trê lÅn nhõng nhÞ hçn cŸc t¡u cÜ tràng tï to¡n ph·n nÅu ê (8) v¡ (9).

4.2 CŸc qui ½Ùnh chung 4.2.1 Bâ trÏ k¾t phÏa mñi t¡u

Qui ½Ùnh 1.1.3-1 Ÿp dòng ½âi vèi cŸc t¡u cÜ hìp ½ãng ½Üng mèi ½õìc kû sau ng¡y 1.1.1982, hoć kháng cÜ hìp ½ãng ½Üng nhõng sâng chÏnh ½õìc ½´t sau ng¡y 1.7.1982 trong sâ cŸc t¡u cÜ täng dung tÏch t÷ 400 trê lÅn, t¡u N, t¡u EN v¡ t¡u NN.

4.2.2 Chöa v¡ x¨ cń d·u (d·u b¸n)

Qui ½Ùnh 2.2.2 Ÿp dòng cho t¡u N, t¡u NN v¡ t¡u EN. 4.2.3 HÎ thâng ghi v¡ kiÌm soŸt viÎc x¨ d·u v¡ hÎ thâng phµn ly d·u - nõèc dïng cho nõèc b¸n ½Ÿy t¡u

Qui ½Ùnh 2.3.3 cñng Ÿp dòng cho t¡u E v¡ t¡u EE. Tuy nhiÅn, viÎc d÷ng x¨ cÜ thÌ thúc hiÎn b±ng tay. 4.3 ThiÆt bÙ ng¯n ng÷a á nhiÍm do d·u chê xá trÅn cŸc t¡u d·u 4.3.1 Bâ trÏ cŸc vŸch ng¯n trong cŸc khoang chöa d·u h¡ng

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

CŸc qui ½Ùnh 3.2.1(3) ½Æn (6) Ÿp dòng ½âi vèi t¡u EE thuæc v¡o mæt trong cŸc trõéng hìp (1) hoć (2) sau ½µy, v¡ cŸc t¡u n¡y sÁ thÞa m¬n cŸc qui ½Ùnh n¡y trõèc ng¡y 2.10.1985 :

(1) T¡u d·u ½õìc b¡n giao trõèc ng¡y 1.1.1977.

(2) T¡u d·u thÞa m¬n c¨ 2 ½iËu kiÎn sau ½µy : (a) ‡õìc b¡n giao trõèc ng¡y 1.1.1977 (b) CÜ hìp ½ãng ½Üng sau ng¡y 1.1.1974. Trong trõéng hìp kháng cÜ hìp ½ãng ½Üng t¡u nhõng sâng

chÏnh ½õìc ½´t sau ng¡y 30.6.1974. 4.3.2 Phµn khoang v¡ än ½Ùnh

CŸc qui ½Ùnh sau ½µy phï Ÿp dòng ½âi vèi t¡u NN v¡ t¡u EN ½Ì thay cho cŸc qui ½Ùnh ê 3.2.2-3(3). Sú än ½Ùnh ê giai ½o−n ngºp cuâi cïng phï ½õìc ‡¯ng kiÌm xem x¾t v¡ cÜ thÌ coi nhõ l¡ ½ð nÆu ½õéng cong cŸnh tay ½Ýn än ½Ùnh dõ cÜ Ït nh¶t ph−m vi 20o phÏa trÅn ½iÌm cµn b±ng, öng vèi trÙ sâ lèn nh¶t cða cŸch tay ½Ýn än ½Ùnh dõ tâi thiÌu b±ng 0,1 m¾t. Phï lõu û ½âi vèi nguy cç tiËm ¸n xu¶t hiÎn do cŸc lå kho¾t ½õìc bö vÎ hay kháng ½õìc bö vÎ m¡ chîng cÜ thÌ sÁ bÙ chÖm nh¶t théi trong gièi h−n än ½Ùnh tØnh.

4.3.3 K¾t d±n cŸch ly

1 Trong ½iËu kiÎn tuµn thð cŸc qui ½Ùnh 4.3.3-2 v¡ 4.3.3-3, t¶t c¨ cŸc t¡u EN v¡ cŸc t¡u EE chê d·u thá tràng tï to¡n ph·n t÷ 40.000 t¶n trê lÅn phï trang bÙ cŸc k¾t d±n cŸch ly thÞa m¬n cŸc qui ½Ùnh 3.2.3 (1). Tuy nhiÅn, cŸc qui ½Ùnh 3.2.3 Ÿp dòng cho cŸc t¡u EN chê d·u thá tràng tï to¡n ph·n t÷ 70.000 t¶n trê lÅn.

2 Tr÷ cŸc t¡u ½õìc dú ½Ùnh chê d·u thá kháng thÏch hìp ½Ì røa b±ng d·u thá, cÜ thÌ trang bÙ hÎ thâng røa b±ng d·u thá tho¨ m¬n cŸc qui ½Ùnh ê 3.4 thay cho cŸc k¾t d±n cŸch ly.

3 ‡âi vèi cŸc t¡u d·u chê d·u thá tràng tï to¡n ph·n t÷ 40.000 t¶n trê lÅn nhõng kháng quŸ 70.000 t¶n, cÜ thÌ trang bÙ cŸc k¾t d±n s−ch thÞa m¬n cŸc qui ½Ùnh 4.3.4 thay cho cŸc k¾t d±n cŸch ly hoć thiÆt bÙ røa b±ng d·u thá trõèc ng¡y 2.10.1987.

4 CŸc t¡u EN v¡ cŸc t¡u EE chê d·u th¡nh ph¸m cÜ tràng tï to¡n ph·n t÷ 40.000 t¶n trê lÅn phï ½õìc trang bÙ cŸc k¾t d±n cŸch ly thÞa m¬n cŸc qui ½Ùnh ê 3.2.3 (1), hoć k¾t chöa nõèc d±n s−ch thÞa m¬n cŸc qui ½Ùnh ê 4.3.4. Tuy nhiÅn, cŸc qui ½Ùnh ê 3.2.3 Ÿp dòng cho cŸc t¡u EN chê d·u thõçng ph¸m cÜ tràng tï to¡n ph·n t÷ 70.000 t¶n trê lÅn.

4.3.4 CŸc qui ½Ùnh ½âi vèi t¡u d·u ½õìc trang bÙ cŸc k¾t nõèc d±n s−ch

1 CŸc k¾t nõèc d±n s−ch theo cŸc qui ½Ùnh 4.3.3-3 hoć 4.3.3-4 phï cÜ ½ð dung tÏch tõçng öng vèi cŸc k¾t d±n cŸch ly ½õìc nÅu ê 3.2.3, v¡ vÖ thÆ chîng phï ½õìc sø dòng d¡nh riÅng ½Ì chöa nõèc d±n s−ch.

2 CŸc phõçng phŸp bâ trÏ v¡ sø dòng cŸc k¾t nõèc d±n s−ch phï thÞa m¬n cŸc ½iËu kiÎn m¡ ‡¯ng kiÌm cho l¡ thÏch hìp.

3 CŸc t¡u d·u ½¬ ho−t ½æng vèi cŸc ½iËu kho¨n vË k¾t nõèc d±n s−ch phï ½õìc trang bÙ cŸc dòng cò ½o h¡m lõìng d·u ½õìc ‡¯ng kiÌm ch¶p thuºn sao cho h¡m lõìng d·u cða nõèc d±n ½õìc x¨ cÜ thÌ kiÌm tra ½õìc.

4 T¶t c¨ cŸc t¡u d·u ½¬ ho−t ½æng vèi cŸc ½iËu kho¨n vË k¾t nõèc d±n s−ch phï trang bÙ mæt b¨n hõèng d¹n sø dòng k¾t nõèc d±n s−ch cÜ cŸc giï thÏch chi tiÆt vË phõçng phŸp v¡ sú bâ trÏ. B¨n hõèng d¹n n¡y phï ½õìc ‡¯ng kiÌm duyÎt v¡ chöa ½úng t¶t c¨ cŸc tháng tin vË cŸc ½ć tÏnh kþ thuºt nhõ ½õìc nÅu ê 4.3.3-2 trÅn.

4.3.5 T¡u d·u ch−y tuyÆn ½ć biÎt

CŸc qui ½Ùnh ê 4.3.3 kháng Ÿp dòng ngay c¨ ê cŸc t¡u EN hoć cŸc t¡u EE cÜ tràng tï to¡n ph·n t÷ 40.000 t¶n trê lÅn, khi chîng ½õìc ho−t ½æng trÅn cŸc tuyÆn ½ć biÎt ½õìc ‡¯ng kiÌm ch¶p thuºn, v¡ ½õìc trang bÙ cŸc k¾t ½Ì giù t¶t c¨ nõèc d±n v¡ nõèc røa k¾t kÌ c¨ nõèc d±n s−ch.

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TCVN 6276 : 2003, Ph·n 3, Chõçng 4

4.3.6 T¡u d·u cÜ d±n ½ć biÎt

Khi ½õìc ‡¯ng kiÌm cho l¡ thÏch hìp, cŸc t¡u EN v¡ cŸc t¡u EE ½õìc ½Üng thÞa m¬n cŸc ½iËu kiÎn vË chiËu chÖm v¡ ½æ chîi nhÞ nh¶t qui ½Ùnh 3.2.3 (1) m¡ kháng sø dòng nõèc d±n cÜ thÌ ½õìc xem nhõ chîng thÞa m¬n cŸc qui ½Ùnh vË k¾t d±n cŸch ly nÅu ê 4.3.3.

4.3.7 HÎ thâng ½Ì giù d·u l−i trÅn t¡u

1 ‡âi vèi cŸc t¡u EE thuºt ngù "1/30.000" trong Ÿp dòng cŸc qui ½Ùnh cða 3.3.1-6(4) cÜ thÌ ½õìc hiÌu nhõ "1/15.000".

2 ‡âi vèi cŸc t¡u EE v¡ cŸc t¡u EN cÜ tràng tï to¡n ph·n t÷ 40.000 t¶n trê lÅn, kháng Ÿp dòng cŸc qui ½Ùnh ê 3.3.1-6 ½Æn 3.3.1-8, vèi ½iËu kiÎn ½õìc ‡¯ng kiÌm ch¶p thuºn qua viÎc x¾t ½Æn khu vúc ho−t ½æng cða t¡u.

4.3.8 HÎ thâng x¨

Mć dï cŸc qui ½Ùnh 3.3.2-2 Ÿp dòng cho t¡u EN v¡ t¡u EE, cŸc ½õéng âng ½Ì x¨ ra biÌn cÜ thÌ ½õìc d¹n ½Æn bÅn dõèi ½õéng mèn nõèc nÆu cÜ kh¨ n¯ng Ÿp dòng cŸc trõéng hìp ê (1) hoć (2) sau ½µy :

(1) CŸc t¡u d·u ho−t ½æng vèi cŸc ½iËu kho¨n vË k¾t nõèc d±n s−ch, kháng thÌ x¨ nõèc d±n t÷ cŸc k¾t nõèc d±n s−ch t−i vÙ trÏ phÏa trÅn ½õéng mèn nõèc, chõa hoŸn cï, v¡ ½õìc trang bÙ dòng cò ½o h¡m lõìng d·u ½õìc nÅu ê 4.3.4-3; hoć

(2) Khi nõèc d±n b¸n hoć nõèc l¹n d·u t÷ cŸc khu vúc k¾t h¡ng ½õìc d¹n qua ½õéng âng câ ½Ùnh ½Æn mæt vÙ trÏ sao cho mæt ph·n dÝng chÿ cÜ thÌ quan sŸt ½õìc b±ng m°t t÷ trÅn boong thõìng t·ng hoć vÙ trÏ dÍ tiÆp cºn khŸc cao hçn ê phÏa trÅn. Tuy nhiÅn, thiÆt bÙ phµn dÝng chÿ ½Ü phï ½õìc ‡¯ng kiÌm duyÎt vË ½ć tÏnh kþ thuºt bao gãm kÆt c¶u, l°p ½´t v¡ ho−t ½æng nhõ mæt ph·n cða hÎ thâng phµn dÝng chÿ ½Ì kiÌm tra viÎc x¨ trÅn t¡u.

4.3.9 HÎ thâng ½õéng âng d·u h¡ng

CŸc t¡u EN hoć t¡u EE ½õìc yÅu c·u phï trang bÙ k¾t d±n cŸch ly, hÎ thâng røa b±ng d·u thá, hoć ½õìc khai thŸc vèi ½iËu kho¨n vË k¾t nõèc d±n s−ch, phï thÞa m¬n cŸc qui ½Ùnh ê 3.3.2-5. Tuy nhiÅn, ½âi vèi cŸc t¡u ½¬ ½õìc l°p ½´t cŸc ½õéng âng cÜ ½õéng kÏnh nhÞ hçn, thÖ ½õéng kÏnh ½õéng âng yÅu c·u cÜ thÌ ½õìc gi¨m ½Æn ½õéng kÏnh nhÞ kháng quŸ 25% tiÆt diÎn cða ½õéng âng x¨ d·u h¡ng.

4.3.10 Ng¯n ng÷a á nhiÍm d·u trong trõéng hìp ½µm va hoć m°c c−n

1 Mæt t¡u d·u phï tho¨ m¬n cŸc yÅu c·u quy ½Ùnh ê 3.2.4 kháng muæn hçn théi ½iÌm b¡n giao t¡u trong n¯m nÅu ê b¨ng 3-10.

2 ‡¯ng kiÌm cÜ thÌ cho ph¾p k¾o d¡i ho−t ½æng cða T¡u d·u lo−i 1 dúa trÅn théi h−n b¡n giao t¡u v¡o n¯m 2005, v¡ cða t¡u d·u lo−i 2 dúa trÅn théi h−n b¡n giao t¡u v¡o n¯m 2010. Nhùng t¡u n¡y l¡ ½âi tõìng duyÎt y cða ‡¯ng kiÌm.

3 Mæt T¡u d·u lo−i 1 cÜ tuäi 25 n¯m trê lÅn kÌ t÷ ng¡y b¡n giao phï tho¨ m¬n cŸc yÅu c·u (1) v¡ (2) sau ½µy:

(1) CŸc k¾t m−n hoć cŸc kháng gian ½Ÿy ½ái, kháng dïng ½Ì chöa d·u v¡ thÞa m¬n cŸc yÅu c·u vË chiËu ræng v¡ chiËu cao ê 3.2.3 (2)(c), phï bao phð Ït nh¶t 30% chiËu d¡i Lt, öng vèi chiËu chÖm lèn nh¶t cða t¡u vË måi bÅn m−n hoć Ït nh¶t 30% diÎn tÏch hÖnh chiÆu vïng tán ½Ÿy t¡u trong ph−m vi chiËu d¡i Lt, trong ½Ü Lt ½õìc xŸc ½Ùnh theo 3.2.3 (2)(a).

(2) T¡u d·u phï ½õìc thao tŸc l¡m h¡ng theo b¨n tÏnh cµn b±ng thuý tØnh, cÜ hõèng d¹n sø dòng.

4 Bä sung v¡o ½iËu kho¨n -2 nÅu trÅn, ‡¯ng kiÌm cÜ thÌ cho ph¾p k¾o d¡i ho−t ½æng cða t¡u nhõ vºy dúa trÅn théi h−n b¡n giao t¡u quy ½Ùnh ê -1 trÅn. Nhùng t¡u n¡y l¡ ½âi tõìng duyÎt y cða ‡¯ng kiÌm.

56

TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 3-9 Sú Ÿp dòng cŸc qui ½Ùnh trong Chõçng 1, 2 v¡ 3 ½âi vèi cŸc t¡u ½õìc xŸc ½Ùnh theo 4.1.1-1

T¡u kháng phï t¡u d·u T¡u d·u

T¡u N T¡u E T¡u NN T¡u EN T¡u EE

1.1.1 × × × × × Chõçng 1 1.1.2 × ×

Qui ½Ùnh chung 1.1.3-1 -2 -3

× × ×

×

× × ×

× ×

× ×

2.2.1-1 -2

× ⎯

× ⎯

× ⎯

× ⎯

× ⎯

Chõçng 2 2.2.2 × × ×

2.2.3 × × × × × 2.3.1 × × × × × 2.3.2 × × ×

Trang thiÆt bÙ ng¯n ng÷a á nhiÍm do d·u t÷ buãng mŸy cða t¡u

2.3.3 × × × 2.4.1 × × × × × 2.4.2 × × × × × 3.2.1 ⎯ ⎯ × × × 3.2.2-1

-2 -3 -4 -5

⎯ ⎯ ⎯ ⎯ ⎯

⎯ ⎯ ⎯

⎯ ⎯

× × ×

(Chî thÏch 1) × ×

× × ×

(Chî thÏch 1)

× ×

3.2.3 ⎯ ⎯ × × (Chî thÏch 3)

Chõçng 3 3.3.1 ⎯ ⎯ × × × KÆt c¶u v¡ trang thiÆt bÙ ½Ì ng¯n ng÷a á nhiÍm do chê xá d·u

3.3.2-1 -2 -3 -4(1) -4(2)

⎯ ⎯ ⎯ ⎯ ⎯

⎯ ⎯ ⎯ ⎯ ⎯

× × × × ×

× × ×

×

(Chî thÏch 4)

× ×

× (Chî thÏch

4) 3.4.1 ⎯ ⎯

(Chî thÏch 2)

(Chî thÏch

2) 3.4.2 ⎯ ⎯ × × × 3.4.3 ⎯ ⎯ × × × 3.4.4 ⎯ ⎯ × × × 3.4.5 ⎯ ⎯ × × × 3.4.6 ⎯ ⎯ × × ×

Chî thÏch : × : Ÿp dòng; : Kháng Ÿp dòng; ⎯ : Ngo¡i ph−m vi Ÿp dòng (Chî thÏch 1) : ‡iËu n¡y kháng Ÿp dòng cho (3) (Chî thÏch 2) : ‡iËu n¡y Ÿp dòng cho (3) (Chî thÏch 3) : ‡iËu n¡y kháng Ÿp dòng cho cŸc t¡u d·u tràng tï to¡n ph·n dõèi 70.000 t¶n (Chî thÏch 4) : ‡iËu n¡y Ÿp dòng cho cŸc t¡u d·u thá cÜ tràng tï to¡n ph·n t÷ 40.000 t¶n trê lÅn.

57

TCVN 6276 : 2003, Ph·n 3, Chõçng 4

B¨ng 3-10 Théi h−n Ÿp dòng cða t¡u d·u

Lo−i t¡u d·u N¯m

T¡u d·u lo−i 1 2003 ½âi vèi t¡u b¡n giao v¡o ho´c trõèc 1973

2004 ½âi vèi t¡u b¡n giao v¡o 1974 v¡ 1975


2006* ½âi vèi t¡u b¡n giao v¡o 1978 v¡ 1979, 1980

2007* ½âi vèi t¡u b¡n giao v¡o v¡ sau 1981






2008 ½âi vèi t¡u b¡n giao v¡o 1982



2011* ½âi vèi t¡u b¡n giao v¡o 1985




2015* ½âi vèi t¡u b¡n giao v¡o v¡ sau 1989













2015 ½âi vèi t¡u b¡n giao v¡o v¡ sau 1989

Chî thÏch: * ‡âi tõìng tho¨ m¬n cŸc quy ½Ùnh 4.3.10-2

58

TCVN 6276 : 2003, Ph·n 4, Chõçng 1

Ph·n 4 kÆt c¶u v¡ thiÆt bÙ ng¯n ng÷a á nhiÍm do thï cŸc ch¶t lÞng ½æc h−i chê xá gµy ra

chõçng 1 Qui ½Ùnh chung


Nhùng qui ½Ùnh cða Chõçng n¡y Ÿp dòng ½âi vèi kÆt c¶u v¡ thiÆt bÙ dïng ½Ì ng¯n ng÷a á nhiÍm do cŸc ch¶t lÞng ½æc h−i ½õìc chê xá gµy ra.

1.2 ‡Ùnh nghØa 1.2.1 Thuºt ngù

Trong Ph·n n¡y sø dòng nhùng thuºt ngù ½õìc ½Ùnh nghØa sau ½µy :

(1) “T¡u mèi” - T¡u chê xá ch¶t lÞng ½æc h−i cÜ sâng chÏnh ½õìc ½´t sau ng¡y 1/7/1986.

(2) “T¡u chê xá ch¶t lÞng ½æc h−i ½ang ½õìc ½Üng” - T¡u cÜ sâng chÏnh ½¬ ½õìc ½´t hoć ½ang ê trong giai ½o−n ½Üng mèi tõçng tú. T¡u b¶t kü ½õìc hoŸn cï th¡nh t¡u chê xá ch¶t lÞng ½æc h−i phï ½õìc coi l¡ t¡u chê xá ch¶t lÞng ½æc h−i v¡o t−i théi ½iÌm cáng viÎc hoŸn cï ½õìc b°t ½·u kháng kÌ théi ½iÌm ½Üng. Nhùng yÅu c·u liÅn quan tèi théi ½iÌm hoŸn cï kháng Ÿp dòng ½âi vèi cáng viÎc hoŸn cï cða t¡u b¶t kü thÞa m¬n t¶t c¨ nhùng yÅu c·u sau ½µy : (a) T¡u ½õìc ½Üng trõèc ng¡y 1/7/1986 ; v¡ (b) T¡u ½õìc c¶p Gi¶y Chöng nhºn theo Bæ Luºt chê xá hoŸ ch¶t ch× chuyÅn chê nhùng ch¶t ½õìc má

t¨ rß r¡ng trong Bæ Luºt n¡y l¡ ch¶t gµy á nhiÍm biÌn.

(3) “Giai ½o−n ½Üng mèi tõçng tú” l¡ nhùng giai ½o−n sau : (a) Giai ½o−n m¡ t−i théi ½iÌm ½Ü cáng viÎc ½Üng mèi ½¬ ½õìc tiÆn h¡nh ½Æn kh¨ n¯ng cÜ thÌ ½Ùnh

hÖnh l¡ mæt con t¡u; hoć (b) Giai ½o−n m¡ viÎc l°p rŸp t¡u ½Ü ½¬ b°t ½·u thúc hiÎn ½õìc Ït nh¶t 50 t¶n s°t th¾p hoć 1% täng

tràng lõìng õèc tÏnh cða t¶t c¨ vºt liÎu kÆt c¶u, l¶y giŸ trÙ n¡o nhÞ hçn.

(4) “T¡u hiÎn cÜ” - T¡u chê xá ch¶t lÞng ½æc h−i kháng phï l¡ t¡u mèi.

(5) “Nõèc d±n s−ch” - ‡âi vèi trõéng hìp thï ½õìc tiÆn h¡nh trong vïng nõèc ngo¡i vïng ½ć biÎt l¡ nõèc d±n ½õìc l¶y v¡o trong k¾t m¡ k¾t n¡y, kÌ t÷ khi ½õìc sø dòng l·n g·n ½µy nh¶t ½Ì chê ch¶t lÞng ½æc h−i, ½¬ ½õìc xø lû theo mæt trong nhùng quy ½Ùnh t÷ (a) ½Æn (e) dõèi ½µy tïy theo lo−i ch¶t lÞng ½æc h−i ½õìc chuyÅn chê v¡ k¾t ½¬ dë hÆt h¡ng. Trõéng hìp thï ½õìc tiÆn h¡nh trong vïng ½ć biÎt l¡ nõèc d±n theo quy ½Ùnh riÅng cða ‡¯ng KiÌm. (a) Khi chuyÅn chê ch¶t lo−i A : Phï røa sç bæ hoć l¡m s−ch lõìng h¡ng cÝn sÜt l−i v¡ thï nõèc røa

h·m v¡o cŸc phõçng tiÎn tiÆp nhºn trÅn bé; TiÆn h¡nh røa l−i v¡ x¨ hån hìp cń/nõèc thu ½õìc t÷ l·n røa n¡y.

(b) Khi vºn chuyÌn cŸc ch¶t cÜ ½æ nhèt cao hoć ch¶t hoŸ r°n thuæc ch¶t lo−i B hoć lo−i C : Phï røa sç bæ v¡ x¨ nõèc røa h·m v¡o cŸc phõçng tiÎn tiÆp nhºn trÅn bé; TiÆn h¡nh røa l−i v¡ thï hån hìp cń/nõèc thu ½õìc t÷ l·n røa n¡y.

(c) Khi vºn chuyÌn cŸc ch¶t cÜ ½æ nhèt th¶p hoć ch¶t kháng hoŸ r°n thuæc ch¶t lo−i B hoć C : Phï røa sç bæ sau khi xŸc nhºn r±ng täng lõìng cń thu ½õìc t÷ t¸y røa phï hìp vèi giŸ trÙ ½¬ ½Ùnh hoć nhÞ hçn v¡ x¨ hån hìp cń/nõèc thu ½õìc t÷ l·n røa n¡y.

(d) Khi vºn chuyÌn cŸc ch¶t thuæc lo−i D : Thï nõèc d±n sau khi pha lo¬ng nõèc d±n 10 l·n. (e) Khø bÞ cń cÝn l−i trong k¾t b±ng quy trÖnh l¡m s−ch b±ng tháng giÜ.

59

TCVN 6276 : 2003, Ph·n 4, Chõçng 1

(6) “Vïng ½ć biÎt” - Vïng biÌn do nhùng nguyÅn nhµn kþ thuºt liÅn quan ½Æn ½iËu kiÎn hï dõçng hàc v¡ sinh thŸi hàc ½¬ ½õìc cáng nhºn v¡ ½ć thï ½i l−i cða vïng biÌn n¡y nÅn c·n phï Ÿp dòng nhùng biÎn phŸp b°t buæc ½ć biÎt ½Ì ng¯n ng÷a á nhiÍm biÌn do ch¶t lÞng ½æc h−i gµy ra. Nhùng vïng ½ć biÎt l¡ :

(a) Vïng biÌn Ban TÏch. (b) Vïng biÌn ‡en. (c) Vïng biÌn Nam cúc

(7) “ Bæ Luºt chê xá hoŸ ch¶t” - Bæ Luºt Ÿp dòng ½âi vèi kÆt c¶u v¡ trang thiÆt bÙ cða t¡u chê xá hoŸ ch¶t nguy hiÌm ½õìc ™y ban Bö vÎ mái trõéng biÌn cða IMO tháng qua b±ng NghÙ quyÆt MEPC.20(22), v¡ cïng vèi cŸc søa ½äi bä sung phï hìp vèi quy trÖnh nÅu ê ‡iËu 16 Cáng õèc (søa ½äi bä sung thÅm v¡o Phò trõçng trong Phò lòc cða Cáng õèc) kÌ c¨ nhùng søa ½äi bä sung cÜ hiÎu lúc cða Bæ Luºt.

(8) “Hån hìp cń/nõèc” - Cń cða nõèc ½¬ ½õìc sø dòng v¡o nhùng mòc ½Ïch b¶t kü (vÏ dò nhõ nõèc røa h·m, nõèc d±n, nõèc la canh).

(9) “Pha lo¬ng” - Pha v¡o nõèc theo tý lÎ b¶t kü t−i nhiÎt ½æ cða nõèc røa h·m.

(10) “‡õéng âng liÅn kÆt” - ‡õéng âng x¨ h¡ng giùa hâ tò trong cŸc k¾t h¡ng v¡ ½·u mît âng cÜ bÏch nâi bé ½õìc sø dòng ½Ì x¨ h¡ng (bao gãm c¨ bçm v¡ bæ làc), v¡ cŸc ½õéng âng khŸc (bao gãm c¨ bçm v¡ bæ làc) ½õìc nâi v¡ mê v¡o ½õéng âng x¨ h¡ng khi x¨ h¡ng.

(11) “Ch¶t hoŸ r°n” - ‡âi vèi ch¶t lÞng ½æc h−i cÜ ½iÌm nÜng chÿ th¶p hçn 15oC l¡ ch¶t cÜ nhiÎt ½æ t−i théi ½iÌm l¡m h¡ng cao hçn kháng quŸ 5oC so vèi ½iÌm nÜng chÿ riÅng; ‡âi vèi ch¶t lÞng ½æc h−i cÜ ½iÌm nÜng chÿ t÷ 15oC trê lÅn l¡ ch¶t cÜ nhiÎt ½æ t−i théi ½iÌm l¡m h¡ng cao hçn kháng quŸ 10oC so vèi ½iÌm nÜng chÿ riÅng.

(12) “Ch¶t kháng hoŸ r°n” - Ch¶t lÞng ½æc h−i kháng phï l¡ ch¶t hoŸ r°n.

(13) “ Ch¶t cÜ ½æ nhèt cao” - ‡âi vèi ch¶t lÞng ½æc h−i thuæc lo−i B v¡ ch¶t lÞng ½æc h−i thuæc lo−i C ½õìc dë h¡ng trong vïng ½ć biÎt l¡ ch¶t cÜ ½æ nhèt t−i théi ½iÌm dë h¡ng t÷ 25 mPa.s trê lÅn, v¡ ½âi vèi ch¶t lÞng ½æc thuæc lo−i C ½õìc dë h¡ng ngo¡i vïng ½ć biÎt l¡ ch¶t cÜ ½æ nhèt t−i théi ½iÌm dë h¡ng t÷ 60 mPa.s trê lÅn.

(14) “Ch¶t cÜ ½æ nhèt th¶p” - Ch¶t lÞng ½æc kháng phï l¡ ch¶t cÜ ½æ nhèt cao.

(15) “Ch¶t lÞng ½æc h−i lo−i A” (gài t°t l¡ “ch¶t lo−i A”) - Ch¶t khi thï xuâng biÌn ½õìc tÏch tò trong sinh vºt biÌn hoć cç thÌ con ngõéi v¡ gµy ra mâi nguy hiÌm lèn, ½õìc nÅu trong danh mòc ê B¨ng 4.1(1) v¡ cŸc ch¶t t−m théi ½õìc ½Ÿnh giŸ nhõ l¡ ch¶t lo−i A.

(16) “Ch¶t lÞng ½æc h−i lo−i B” (gài t°t l¡ “ch¶t lo−i B”) - Ch¶t cÜ kh¨ n¯ng tÏch tò mæt tu·n hoć Ït hçn, ½õìc nÅu ê B¨ng 4 -1(2) v¡ cŸc ch¶t t−m théi ½õìc ½Ÿnh giŸ nhõ l¡ ch¶t lo−i B.

(17) “Ch¶t lÞng ½æc h−i lo−i C” (gài t°t l¡ “ch¶t lo−i C”) - Ch¶t cÜ kh¨ n¯ng gµy nÅn v¡i möc ½æ nguy hiÌm nhÞ cho sinh vºt biÌn, ½õìc nÅu ê B¨ng 4 -1(3) v¡ cŸc ch¶t t−m théi ½õìc ½Ÿnh giŸ nhõ l¡ ch¶t lo−i C.

(18) “Ch¶t lÞng ½æc h−i lo−i D” (gài t°t l¡ “ch¶t lo−i D”) - Ch¶t cÜ kh¨ n¯ng gµy nÅn v¡i möc ½æ cÜ thÌ gài l¡ nguy hiÌm cho sinh vºt biÌn, ½õìc nÅu ê B¨ng 4 -1(4) v¡ cŸc ch¶t ½õìc t−m théi coi nhõ l¡ ch¶t lo−i D.

(19) “Ch¶t giâng d·u mÞ” - Ch¶t lo−i C v¡ lo−i D cÜ cŸc ½ć tÏnh giâng d·u mÞ, ½õìc nÅu ê B¨ng 4 -2(1) v¡ (2), v¡ cŸc ch¶t ½õìc IMO xÆp t−m théi v¡o lo−i ch¶t giâng d·u mÞ.

60

TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4 -1(1) Danh mòc ch¶t lÞng ½æc làai A

Ch¶t làai A H¡m lõìng cń tÏnh theo % tràng lõìng

1. Ch¶t lo−i A I Ngo¡i vïng ½ć

biÎt

II Trong vïng ½ć

biÎt Ethyl acrylate 0,1 0,05 Decyl acrylate 0,1 0,05 Acetone cyanohydrin 0,1 0,05 o - Ethylphenol 0,1 0,05 Paraffin (C10- C13) Clo hÜa 0,1 0,05

Dung dÙch khoan chöa muâi kÁm 0,1 0,05 Creasote (chiÆt xu¶t t÷ than ½Ÿ), Creosote ( chiÆt xu¶t t÷ gå) 0,1 0,05 Cresol (t¶t c¨ cŸc ½ãng phµn) 0,1 0,05 Dung dÙch muâi Nat ri, a xÏt Cresylic 0,1 0,05 Chlorotoluene (l¹n læn cŸc ½ãng phµn) 0,1 0,05 0-Chlorotoluene 0,1 0,05 Nhúa than ½Ÿ 0,1 0,05 Rõìu (C6- C17) (bºc hai) poly (3-6) Ethoxylate 0,1 0,05

Rõìu (C12- C15) poly (1-3) Ethoxylate

Rõìu (C12- C15) poly (3 - 11) Ethoxylate

0,1 0,05

Octyl Nitrate (T¶t c¨ cŸc ½ãng phµn) 0,1 0,05 Dislopropylbenzene (T¶t c¨ cŸc ½ãng phµn) 0,1 0,05 2,4 - Dichlorophenol 0,1 0,05 Dung dÙch muâi Diethanolamine, axÏt 2,4- Dichlorophenoxyacetic 0,1 0,05 Dung dÙch muâi Dimethylamine, a xÏt 2,4 - Dichlorophenoxyacetic (70% hoć nhÞ hçn)

0,1 0,05

Dung dÙch muâi Triisopropanolamine, a xÏt 2,4 -Dichlorophenoxyacetic 0,1 0,05 Hån hìp d·u châng nä dïng cho ½æng cç 0,1 0,05 Diphenyl 0,1 0,05 Hån hìp Diphenyl /Diphenyl Ete 0,1 0,05 Ete Diphenyl 0,1 0,05 Hån hìp Diphenyl Ete /Diphenyl Phenyl Ete 0,1 0,05 D·u Carbolic 0,1 0,05 Triethylbenzene 0,1 0,05 Dodecyl phenol 0,1 0,05 Naphthalene (nÜng chÿ) 0,1 0,05 A xÏt Naphthenic 0,1 0,05 Calcium naphthenate trong d·u khoŸng 0,1 0,05 Cobalt naphthenate trong dung mái Naphtha 0,1 0,05 Nonylphenol 0,1 0,05 Phât pho, tr°ng hoć ½Þ 0,1 0,05 Vinyltoluene 0,1 0,05

61

TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(1) Danh mòc cŸc ch¶t lÞng ½æc lo−i A (tiÆp theo)

Ch¶t làai A H¡m lõìng cń tÏnh theo % tràng lõìng

1. Ch¶t lo−i A I Ngo¡i vïng ½ć

biÎt

II Trong vïng

½ć biÎt

Dibutyl phthalate 0,1 0,05

Butyl benzyl phthalate 0,1 0,05

Butylbenzene (T¶t c¨ cŸc ½ãng phµn) 0,1 0,05

Dung dÙch Metam sodium 0,1 0,05

Alpha - methylstyrene 0,1 0,05

Methylnaphthalene 0,1 0,05

Trixylyl phosphate 0,1 0,05

Tricresyl phosphate (Chöa Ït hçn 1% ½ãng phµn ortho) 0,1 0,05

Tricresyl phosphate (Chöa 1% ½ãng phµn ortho hoć nhiËu hçn) 0,1 0,05

2. CŸc ch¶t t−m théi ½õìc ChÏnh quyËn ½Ÿnh giŸ nhõ l¡ ch¶t ½æc vèi möc ½æ tõçng öng vèi ch¶t lo−i A

0,1* 0,05**

3. Hån hìp cŸc ch¶t ½õìc phµn v¡o ch¶t lo−i A theo MEPC/ Circ. 214. 0,1* 0,05**

Chî thÏch : * : Phï l¡ 0,01 nÆu chöa Phât pho ½Þ hoć tr°ng **: Phï l¡ 0,005 nÆu chöa Phât pho ½Þ hoć tr°ng

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(2) Danh mòc ch¶t lÞng ½æc lo−i B

Ch¶t lo−i B 1. Ch¶t lo−i B

Isobutyl acrylate 2- Ethylhexyl acrylate n- Butyl acrylate 2- Hydroxyethyl acrylate Methyl acrylate Acrylonitrile Dung dÙch Sodium nitrite Di-n hexyl adipate Dimethyl adipate Rõìu gâc Allyl Isophorone diisocyanate Rõìu gâc Undecyl 1- Undecene Ethylidene norbornene Ethyltoluene 2- Ethyl-3 propylacrolein 2- Ethylthexylamine Allyl chloride Vinylidene chloride Benzyl chloride Octyl aldehyde Octane (T¶t c¨ cŸc ½ãng phµn) Hån hìp Olefin (C5- C15)

Hån hìp Alpha - Olefin (C5- C18)

Xylenol Isopropybenzene Crotonaldehyde m - Chlorotoluene p - Chlorotoluene n- Propyl chloride Chlorobenzene Chloroform Dung mái d·u nhúa than ½Ÿ Cyclohexyl acetate Hexyl acetate Heptyl acetate Methyl salicylate Carbon tetrachloride 1 - 3 - Cyclopentadiene dimer (nÜng ch¨y) Cyclopentene Rõìu (C6- C17) (bºc hai) poly (7-12) Ethoxylate

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B¨ng 4-1(2) Danh mòc ch¶t lÞng ½æc lo−i B (tiÆp theo)

Ch¶t lo−i B

1. Ch¶t lo−i B D·u Camphor Dung dÙch Calcium hypochlorite (lèn hçn 15%) Diisobutylene 1,1 Dichloroethane 1,1- Dichloropropane 1,2 - Dichloropropane 1,3 - Dichloropropane 1,3 - Dichloropropene Hån hìp Dichloropropane/Dichloropropene 1,6 - Dichlorohexane Dichlorobenzene (t¶t c¨ cŸc ½ãng phµn) Dinitrotoluene (nÜng chÿ) Diphenylmethane diisocyanate Ethylene dibromide Styrene monomer Dung dÙch Sodium thiocyanate (56% hoć nhÞ hçn) Tetrachloroethane Perchloroethylene Turpentine Rõìu gâc Decyl (t¶t c¨ cŸc ½ãng phµn) Decene D·u Tall (thá v¡ chõng c¶t) Glycidyl este cða a xÏt C10 trialkylacetic 1,1,1- Trichloroethane 1,1,2- Trichloroethane Trichloroethylene 1,2,3- Trichloropropane 1,2,4- Trichlorobenzene 2,2,4- Trimethylhexamethylene diisocyante (2,2,4 v¡ cŸc ½ãng phµn m−ch 2,2,4) Trimethyl benzene (t¶t c¨ cŸc ½ãng phµn) Rõìu gâc Dodecyl Dung dÙch Dodecyl diphenyl ete disulphonate Dodecene (t¶t c¨ cŸc ½ãng phµn) Ethylene dichloride Carbon disulphide o - Chloronitrobenzene o - Nitrophenol (nÜng chÿ) Nitrobenzene

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4 -1(2) Danh mòc ch¶t lÞng ½æc lo−i B (tiÆp theo)

Ch¶t lo−i B 1. Ch¶t lo−i B

Vinyl neodecanoate Nonyl phenol poly (4-12) ethoxylate Nonene n - Butyraldehyde Dichloroethyl ete Diglycidyl ete cða bisphenol A Nhúa Diphenylol propane - epichlorohydrin Diglycidyl ete cða bisphenol F Pinene Phenol Dung dÙch d·u x¡ phÝng Tall (½õìc dÙ phµn hÜa) Dung dÙch Rosin soap (½õìc dÙ phµn hÜa) Diisobutyl phthalate Butene oligomer Propylene trimer Propylene tetramer Pentachloroethane White spirit, hìp ch¶t d¬y thçm th¶p (15-20%) Nhúa Methacrylic trong dung dÙch 1,2-Dichloroethane Methacrylonitrile 2- Methyl -5-ethyl pyridine Methylcyclopentadiene dimer 2- Methylpyridine 4- Methylpyridine N-Methyl - 2 pyrrolidone Methyl heptyl ketone Mercaptobenzothiazol, dung dÙch muâi nŸt ri A xÏt Lauric Dung dÙch Lactonitrile (80% hoć nhÞ hçn) Dung dÙch Ammonium sulphide (45% hoć nhÞ hçn) Dung dÙch Sodium hydrosulphide/Ammonium sulphide Dung dÙch Sodium hydrosulphide (45% hoć nhÞ hçn) Dung dÙch Sodium sulphide Diethyl sulphate Rosin S¨n ph¸m nhúa tháng thÅm ch¶t Fumaric, tŸch nõèc

2. CŸc ch¶t ½õìc ChÏnh quyËn ½Ÿnh giŸ t−m théi l¡ ch¶t ½æc ê möc ½æ tõçng öng vèi cŸc ch¶t lo−i B

3. Hån hìp cða cŸc ch¶t ½õìc phµn lo−i v¡o ch¶t lo−i B theo MEPC/circ 214.

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(3) Danh mòc cŸc ch¶t lÞng ½æc lo−i C

Ch¶t lo−i C 1. Ch¶t lo−i C

Alkyl acrylate - vinyl pyridine copolymer trong toluene Acetaldehyde Aniline Isopropanolamine Dung dÙch Sodium sulphite Calcium alkyl salicylate A xÏt Alkyl benzene sulphonic Dung dÙch a xÏt Alkyl benzene sulphonic, muâi nŸt ri Dung dÙch Sodium aluminate Nõèc Ammoni°c (28% hoć nhÞ hçn) Isovaleraldehyde Isobutyradehyde Isoprene Isopropylamine Isopropylcyclohexance 2,2,4- Trimethyl-1, 3-pentanediol - 1-isobutyrate Ethylamine Dung dÙch Ethylamine (72% hoć nhÞ hçn) Ethylcyclohexane N - Ethylbutylamine Ethylbenzen Ethyl amyl ketone Ethylene Chlorohydrin Ethylene glycol diacetate Ethylene glycol butyl ete acetate Ethylenediamine Epichlorohyrin Dung dÙch Ferric chloride Octanol (t¶t c¨ cŸc ½ãng phµn) Octane (t¶t c¨ cŸc ½ãng phµn) Hån hìp Olefin (C5- C7)

Dung dÙch Hydrogen peroxide (trÅn 8% nhõng nhÞ hçn 60%) Dung dÙch Hydrogen peroxide (trÅn 60% nhõng nhÞ hçn 70%) Xylene A xit Chloroacetic (80% hoć nhÞ hçn) A xit Chlorosulphonic Dimethyl glutarate Amyl acetate, thõçng m−i

D·u dïng cho h¡ng kháng gâc Alkylate (C8 paraffins v¡ iso - paraffins BTP 95 - 120oC)

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(3) Danh mòc ch¶t lÞng ½æc lo−i C (tiÆp theo)


Dimethyl succinate A xit ½õìc nitrat hÜa (hån hìp a xit sulphuric v¡ nitric ) Isobutyl acetate Isoamyl acetate 2- Ethoxyethyl acetate Amyl acetate bºc hai n-Butyl acetate n-Amyl acetate Vinyl acetate Benzyl acetate Methylamyl acetate 1,2- Butylene oxide Cyclohexanol Cyclohexane Cyclohexylamine Cycloheptane Cyclopentane p- Cymene A xit Nitric (nãng ½æ nhÞ hçn 70%) A xit Nitric (nãng ½æ 70% v¡ cao hçn) Dung dÙch Urea/Ammomnium nitrate (chöa nõèc Ammoni°c) Dung dÙch Ferric nitrate/A xÏt Nitric Dung dÙch Calcium hypochlorite (nãng ½æ 15% hoć nhÞ hçn) Dung dÙch Sodium hypochlorite (nãng ½æ 15% hoć nhÞ hçn ) Diisopropanolamine Diisopropylamine Diethylaminoethanol Diethylamine Diethybenzene Diethylene glycol methyl ether Di-n-propylamine Dibutylamine Diisobutylamine Dipentene Dung dÙch Dimethylamine (nãng ½æ 45% hoć nhÞ hçn) Dung dÙch Dimethylamine (nãng ½æ lèn hçn 45% nhõng kháng lèn hçn 55%) Dung dÙch Dimethylamine (nãng ½æ lèn hçn 55% nhõng kháng lèn hçn 65%)

67

TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(3) Danh mòc cŸc ch¶t lÞng ½æc lo−i C (tiÆp theo)


A xit Dimethyl octanoic A xit Neodecanoic N,N-Dimethylcyclohexylamine Dung dÙch Sodium Dichromate (nãng ½æ 70% hoć nhÞ hçn) Dung dÙch Potassium hydroxide Dung dÙch Sodium borohydride (nãng ½æ 15% hoć nhÞ hçn)/Sodium hydroxide Dung dÙch Ammonium thiocyanate (nãng ½æ 25% hoć nhÞ hçn)/ Ammonium thiosulphate (nãng ½æ 20% hoć nhÞ hçn) Dung dÙch Ammonium thiosulphate (nãng ½æ 60% hoć nhÞ hçn) Tetrahydronaphthalene 1,2,3,5- Tetramethybenzene A xÏt b¾o cða d·u than ½Ÿ (a xit nhúa than ½Ÿ nhÞ hçn 20%) Triethylamine 1,1,2-Trichloro - 1,2,2- Trifluoroethane Trimethylamine o-Toluidine Toluene Toluenediamine Toluene diisocyanate o- hoć p- Nitrotoluen Rõìu gâc Nonyl (t¶t c¨ cŸc ½ãng phµn) Nonane (t¶t c¨ cŸc ½ãng phµn) A xit Undecanoic A xit Decanoic n - Butyl ete n - Propanolamine n - Propylamine n - Propylbenzene A xit Sulphuric, phÆ thï Oleum A xit b¾o cða d·u cà Paraldehyde 2,2 - Dichloroisopropyl ete Vinyl ethyl ete 1-Phenyl - 1 xylyl ethane Diethyl phthalate Dimethyl phthalate

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(3) Danh mòc cŸc ch¶t lÞng ½æc lo−i C (tiÆp theo)


Furfural Rõìu gâc Furfuryl Butylamine (t¶t c¨ cŸc ½ãng phµn) Propionitrile Propylene dimer Hexamethyleneimine Dung dÙch Haxemethylenediamine Hexane (t¶t c¨ cŸc ½ãng phµn) Heptanol (t¶t c¨ cŸc ½ãng phµn ) Heptene (t¶t c¨ cŸc ½ãng phµn ) Rõìu gâc Benzyl Benzene v¡ hån hìp chöa 10% benene hoć lèn hçn 1,3 - Pentadiene Pentane (t¶t c¨ cŸc ½ãng phµn ) Dung dÙch Formaldehyde (nãng dæ 45% hoć nhÞ hçn) Polyethylene polyamine Dung dÙch Polyferric sulphate Phthalic anhydride ( nÜng chÿ) Propionic anhydride Dung dÙch Methylamine (nãng ½æ 42% hoć nhÞ hçn) 2-Methyl-6-ethy aniline Methylcyclohexane Rõìu gâc Methylamyl Methyl amyl ketone A xit b¾o cða d·u d÷a Ethyl butyrate n - Butyl butyrate A xÏt Sulphuric A xit Di - (2 - Ethylhexyl) Phosphoric

2. CŸc ch¶t ½õìc ChÏnh quyËn ½Ÿnh giŸ t−m théi nhõ l¡ ch¶t ½æc ê möc ½æ tõçng öng vèi ch¶t lo−i C

3. Hån hìp cŸc ch¶t ½õìc phµn lo−i v¡o ch¶t lo−i C theo MEPC/Circ 214

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(4) Danh mòc cŸc ch¶t lÞng ½æc lo−i D

Ch¶t lo−i D 1. Ch¶t lo−i D

Dung dÙch Arcrylamide (nãng ½æ 50% hoć nhÞ hçn) A xit Acrylic Diisononyl adipate Di- (2 - ethylhexyl) adipate Adiponitrile Ethyl acetoacetate Methyl acetoacetate D·u lanh (Vegetable oil n.o.s) Aminoethyl ethanolamine N- Aminoethylpiperazin 2 - (2 - Aminoethoxy) ethanol 2 -Amino -2-Methyl-1-Propanol (nãng ½æ 90% hoć nhÞ hçn) Dung dÙch Sodium hydrogen sulphite (nãng ½æ 35% hoć nhÞ hçn) Alkyl (C9 - C17) benzene, Decylbenzene Isopropyl ete Isophorone Isophoronediamine Ethanolamine N - Ethylcyclohexylamine Ethylene glycol Ethylene Glycol methyl butyl ete Ethylene Glycol acetate Ethylene Glycol isopropyl ete Hån hìp Ethylene Glycol phenyl ete / Diethylene glycol phenyl ete Ethylene Glycol methyl ete Ethylene Glycol methyl ether acetate Ethylene cyanohydrin Dung dÙch Ethylenediamine, A xit tetracetic , muâi tetrasodium 2- Ethoxyethanol Dung dÙch Aluminium chloride (nãng ½æ 30% hoć nhÞ hçn)/ A xit Hydrochloric (nãng ½æ 20% hoć nhÞ hçn) Dung dÙch Urea/Ammonium mono - v¡ di-hydrogen phosphite / Potassium chloride Dung dÙch Choline chloride Benzene sulphonyl chloride A xit Hydrochloric A xit Octanoic (t¶t c¨ cŸc ½ãng phµn ), A xit 2-Etylhexanoice D·u á liu (Vegetable oil n.o.s) A xit Oleic Cashew nut shell oil (kháng xø lû) Epsilon - Caprolactam (nÜng chÿ hoć dung dÙch nõèc)

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(4) Danh mòc cŸc ch¶t lÞng ½æc lo−i D (tiÆp theo)

Ch¶t lo−i D 1. Ch¶t lo−i D A xit Pentanoic A xit Formic Isobutyl formate Methyl formate D·u cŸ (d·u cŸ v¡ d·u cŸc lo¡i bÝ sŸt) A xit Citric Chlorohydrin (thá) Dung dÙch Glyoxal (nãng ½æ 40% hoć nhÞ hçn) Dung dÙch Glutaraldehyde (nãng ½æ 50% hoć nhÞ hçn) Dung dÙch Sodium silicate Coal tar pitch (nÜng chÿ) D·u cŸm g−o (Vegetable oil n.o.s) D·u Sesame (Vegetable oil n.o.s) A xit Acetic Ethyl acetate Butyl acetate bºc hai n - Octyl acetate n - Propyl acetate 3 - Methoxybutyl acetate D·u Safflower (Vegetable oi o.n.s) Dung dÙch Ethylene oxide/Propylene oxide cÜ h¡m lõìng Ethylene oxide kháng lèn hçn 30% tràng lõìng Propylene oxide Mesityl oxide Silicon tetrachloride Titanium tatrachloride Cyclohexanone Dung dÙch Ammonium nitrate (nãng ½æ 93% hoć nhÞ hçn) Dung dÙch Urea/Ammonium nitrate (chöa nõèc Amoni°c) Rõìc Diacetone Diisobutyl ketone Diisopropyl naphthalene Diethylene glycol dibbutyl ete Diethylene glycol ethyl ete acetate Diethylene glycol butyl ether acetate Diethylene glycol methyl ether acetate Diethylenetriamine 1,4 - Dioxane A xÏt 2,2 - Dichloropropionic Dichloromethane Dung dÙch 1,4 -Dihydro-9, 10 -Dihydroxy anthrancene, muâi disodium

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-1(4) Danh mòc cŸc ch¶t lÞng ½æc lo−i D ( tiÆp theo)


Dipropyrene glycol methyl ete Dung dÙch N.N -Dimenthylacetamide (nãng ½æ 40% ho´c nhÞ hçn) Dimethylethanomine 2,2- Diemethûpopane -1,3-diol Dimethylformamide Më ½æng vºt A xit b¾o cða më ½æng vºt Bïn Calcium hydroxide Dung dÙch Sodium hydroxide Sulpholane D·u gan cŸ thu (d·u ½æng vºt v¡ d·u cŸ) Dung dÙch Sodium carbonate D·u ½ºu n¡nh ( d·u thúc vºt) Tetraethylene pentamine Tetrahydrofuran Decahydronaphthalene D·u ngá ( d·u thúc vºt) D·u Tung (d·u thúc vºt) Triethanolamine Triethylene glycol ethyl ete Trienthylenetetramine Tripropyrene glycol methyl ete A xit Trimethylacetic Trimethylhexamehylene diamine (½ãng phµn 2,2,4 v¡ 2,4,4) Trimethylol propane polyethoxylate Dung dÙch a xit Dodecenyl succinic, muâi dipotassium Rape seed oil (vegetable oil u.o.s) Dung dÙch a xit Naphthalene sulphonic - formaldehyde copolymer, muâi sodium Dung dÙch a xit Nitrilotriacetic , muâi trisodium Hån hìp Nitroropropane (60%)/Nitroethane (40%) 1- ho´c 2-Nitropropane A xit Lactic Butyl lactate Dung dÙch Urea/Ammonium phosphate Nonanoice (t¶t c¨ cŸc ½ãng phµn) n - Valeraldhyde A xit Hexanoic

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1



A xit n - Heptanoic

Palm stearin

D·u h−t cà ( d·u thúc vºt)

D·u cà ( d·u thúc vºt)

Palm oil fatty acid methyl ester

Dung dÙch a xit Ferric hydroxyethyl ethylenediamine triacetic, muâi trisodium

Dung dÙch N -(Hydroxyethyl) ethylenediamine triacetic, muâi trisodium

D·u th·u d·u ( d·u thúc vºt)

D·u hõèng dõçng ( d·u thúc vºt)

Pyridine

Dialkyl (C7 - C13) phthalate

Diisodecyl phthalate

Dinonyl phthalate

Ditridecyl phthalate

Diundecyl phthalate

Butylene glycol

Gamma - Butyrolactone Brake fruid base mix: (poly (2- 8) alkylene (C2- C3) glycols/polyalkylene (C2 - C10) glycols monoalbyl (C1- C4) ete v¡ cŸc ete borat cða chuáng)

Beta - Propiolactone

Propionaldehyde

A xit Propoinic

Ethyl propionate

Propylene glycol monoalkyl ete

Propylene glycol ethyl ete

Propylene glycol methyl ete

Hexanol

Hexamethylenediamine adipate (nãng ½æ 50% trong nõèc)

Dung dÙch Hexamethylenetetramine

Pentaethylenehexamine

Rõìu gâc n -Amyl

Rõìu gâc Amyl bºc hai

rõìu gâc Amyl bºc mæt

Rõìu gâc Isoamyl

Formamide

Polyalkylene glycol butyl ete

Polypropylene glycol

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1



Plymethylene polyphenyl isocyanate D·u Sperm (d·u cŸ v¡ d·u ½æng vºt bÝ sŸt) Maleic anhydride Acetic anhydride Methacrylic acid Hån hìp Butyl/Decyl/Cetyl/Eicosyl methacrylate Ethyl methacrylate Nonyl methacrylate monomer Butyl methactylate Methyl tert - butyl ete Methy butenol Methyl butyl ketone Methyl isobutyl ketone Methyl butynol Methyl propyl ketone D·u Cottonseed (Vegetable oil n.o.s) Morpholine D·u d÷a (Vegetable oil n.o.s) Methyl ester cða a xÏt b¾o d·u d÷a A xÏt Butyric D·u Groundnut (Vegetable oil n.o.s) Latex (½õìc öc chÆ b±ng Amoni°c) Dung dÙch Aluminium sulphate Dung dÙch Ammonium sulphate A xit Phosphoric

2.CŸc ch¶t ½õìc ChÏnh quyËn t−m théi ½Ÿnh giŸ l¡ ch¶t ½æc ê möc ½æ tõçng öng nhõ ch¶t ½æc lo−i D

3. Hån hìp cða cŸc ch¶t ½õìc phµn lo−i v¡o lo−i D theo MEPC/Cire.214.

B¨ng 4-1(5) Danh mòc khÏ hÜa lÞng

KhÏ hÜa lÞng Lo−i ch¶t khÏ hÜa lÞng

Vinylidene chloride B Acetaldehyde C Isoprene C Isopropylamine C Ethylamine C Vinyl ethyl ete C Hån hìp Ethylene oxide/Propylene oxide cÜ h¡m lõìng Ethylene oxide kháng lèn hçn 30% tÏnh theo tràng lõìng

D

Propylene oxide D

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TCVN 6276 : 2003, Ph·n 4, Chõçng 1

B¨ng 4-2(1) Danh mòc cŸc ch¶t lo−i C giâng d·u mÞ

Ch¶t lo−i C Aviation alkylate Cycloheptane Cyclohexane Cyclopentane P - Cymene Diethylbenzene Dipentene Ethylbenzene Ethylcyclohexane Heptene (t¶t c¨ cŸc ½ãng phµn ) Hexane (t¶t c¨ cŸc ½ãng phµn ) Hexene (t¶t c¨ cŸc ½ãng phµn ) Isopropylcyclohexane Methylcyclohexan 2 - Methyl -1-pentene Nonane (t¶t c¨ cŸc ½ãng phµn ) Hån hìp Olefin (C5 - C7)

Pentane (t¶t c¨ cŸc ½ãng phµn ) Pentene (t¶t c¨ cŸc ½ãng phµn ) 1 - Phenyl - 1-xylyl ethane Propylene dimer Tetrahydronaphthalene Toluene Xylen

B¨ng 4-2(2) Danh mòc cŸc ch¶t lo−i D giâng d·u mÞ

Ch¶t lo−i D

Alkyl (C9- C17) benzene

Diisopropyl naphthalene

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TCVN 6276 : 2003, Ph·n 4, Chõçng 3

chõçng 2 KÆt c¶u v¡ thiÆt bÙ cða t¡u mèi 2.1 Qui ½Ùnh chung 2.1.1 Ph−m vi Ÿp dòng

Nhùng yÅu c·u cða Chõçng n¡y ½õìc Ÿp dòng ½âi vèi t¡u mèi. 2.2 YÅu c·u vË l°p ½´t kÆt c¶u v¡ thiÆt bÙ 2.2.1 ThiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i

1 ‡âi vèi t¡u mèi, thiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i quy ½Ùnh ê B¨ng 4-3 phï ½õìc trang bÙ phï hìp vèi lo−i v¡ lû tÏnh cða ch¶t lÞng ½æc h−i chuyÅn chê v¡ vïng biÌn thï.

2 Phï trang bÙ bä sung v¡o cŸc thiÆt bÙ nÅu ê 2.2.1-1 hÎ thâng røa h·m b±ng tháng giÜ cho cŸc t¡u dú ½Ùnh khø cń ch¶t lÞng ½æc h−i cÜ Ÿp su¶t hçi võìt quŸ 5 kPa ê 20oC b±ng tháng giÜ.

3 B¶t kÌ nhùng yÅu c·u ½¬ nÅu ê 2.2.1-1 v¡ 2.2.1-2, hÎ thâng ng¯n ng÷a thï ch¶t lÞng ½æc h−i quy ½Ùnh phï l°p ½´t trÅn t¡u thÞa m¬n nhùng yÅu c·u (1) v¡ (2) dõèi ½µy l¡ k¾t d±n cŸch ly, hÎ thâng hµm h¡ng (½õìc gièi h−n ½âi vèi t¡u ch× chê ch¶t lo−i B cÜ ½iÌm nÜng chÿ t÷ 15oC trê lÅn) v¡ thiÆt bÙ ½Ì thï v¡o cŸc phõçng tiÎn tiÆp nhºn.

(1) Khi t¡u dú ½Ùnh chê thõéng xuyÅn trong måi h·m ch× mæt ch¶t lÞng ½æc h−i hoć ch¶t tõçng thÏch (nghØa l¡ mæt ch¶t trong cŸc ch¶t lÞng ½æc h−i kháng yÅu c·u phï l¡m s−ch h·m h¡ng ½Ì xuâng h¡ng sau khi h·m h¡ng ½¬ chöa mæt ch¶t lÞng ½æc h−i khŸc v¡ ½¬ dë hÆt ch¶t n¡y).

(2) Khi t¡u ch× tiÆn h¡nh thï nõèc røa thu gom ½õìc t÷ viÎc l¡m s−ch h·m h¡ng v¡o cŸc phõçng tiÎn tiÆp nhºn thÏch hìp trõèc khi søa chùa hoć lÅn ½¡.

4 B¶t kÌ nhùng yÅu c·u ½¬ nÅu ê -1 ½Æn -3 trÅn, hÎ thâng ng¯n ng÷a thï ch¶t lÞng ½æc h−i ½õìc trang bÙ trÅn t¡u chê ch¶t lÞng ½æc h−i cÜ Ÿp su¶t hçi võìt quŸ 5 kPa ê 20oC dú ½Ùnh khø cń b±ng tháng giÜ phï l¡ hÎ thâng røa h·m b±ng tháng giÜ.

2.2.2 Nhùng yÅu c·u ½ć biÎt cho t¡u mèi chê ch¶t lo−i A, lo−i B hoć lo−i C.

T¡u chê ch¶t lo−i A, lo−i B hoć lo−i C phï thÞa m¬n nhùng yÅu c·u ê TCVN 6259-8E :2003 T¡u chê xá hoŸ ch¶t nguy hiÌm. Tuy nhiÅn, cÜ thÌ miÍm gi¨m ½âi vèi t¡u chê xá khÏ hoŸ lÞng thÞa m¬n nhùng yÅu c·u ê TCVN 6259-8D :2003 T¡u chê xá khÏ hoŸ lÞng dú ½Ùnh chê ch¶t lÞng ½æc h−i nÅu ê B¨ng 4-1(5) cða Qui ph−m n¡y.

2.2.3 Nhùng yÅu c·u ½ć biÎt cho t¡u mèi chê ch¶t giâng d·u mÞ.

Ngo¡i nhùng yÅu c·u 2.2.1 v¡ 2.2.2, t¡u d·u chê xá ch¶t lÞng ½æc h−i giâng d·u mÞ, v¡ kháng ½õìc chê cŸc ch¶t lÞng ½æc h−i khŸc vèi ch¶t lÞng ½æc h−i giâng d·u mÞ, cÜ dú ½Ùnh thï cń b±ng viÎc sø dòng trang thiÆt bÙ quy ½Ùnh ê Ph·n 3 phï thÞa m¬n nhùng yÅu c·u cða B¨ng 4-4 phï hìp vèi phµn lo−i ch¶t giâng d·u mÞ ½Ùnh chuyÅn chê.

76

TCVN 6276 : 2003, Ph·n 4, Chõçng 32

B¨ng 4-3 ThiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i trÅn t¡u mèi

Phµn lo−i ch¶t Lo−i A Lo−i B Lo−i C Lo−i D

ThiÆt bÙ

Vïng biÌn thï

T¶t c¨ cŸc vïng

Ngo¡i vïng ½ć biÎt

Trong vïng ½ć

biÎt

T¶t c¨ cŸc vïng

T¶t c¨ cŸc vïng

Lû tÏnh

T¶t c¨ cŸc

ch¶t

Ch¶t cÜ ½æ nhèt

cao hoć hoŸ r°n


th¶t hoć kháng hoŸ r°n

T¶t c¨ cŸc

ch¶t


cao hoć hoŸ r°n


th¶p hoć kháng hoŸ r°n

T¶t c¨ cŸc

ch¶t

HÎ thâng røa sç bæ × (Chî thÏch 1)

× × (Chî thÏch 2)

× × × (Chî thÏch 2)

⎯

HÎ thâng t¸y cń ⎯ × × ⎯

Lå x¨ dõèi ½õéng nõèc × (Chî thÏch 3)

× (Chî thÏch 3) × (Chî thÏch 3) ⎯

Trang thiÆt bÙ ½Ì x¨ v¡o phõçng tiÎn tiÆp nhºn

× × (Chî thÏch 4) × (Chî thÏch 4) × (Chî thÏch 4)

HÎ thâng nõèc pha lo¬ng

⎯ ⎯ ⎯ ×

HÎ thâng hµm h¡ng ⎯ × (Chî thÏch 5) ⎯ ⎯

Kû hiÎu × : Phï trang bÙ ⎯ : Kháng yÅu c·u trang bÙ

Chî thÏch (1) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü cÜ kh¨ n¯ng thï hån hìp cń/nõèc v¡o cŸc phõçng tiÎn

tiÆp nhºn cho ½Æn tºn khi nãng ½æ ch¶t ½æc h−i chöa trong dÝng nõèc thï ½õìc gi¨m xuâng tèi giŸ trÙ quy ½Ùnh trong B¨ng 4-1(1) hoć nhÞ hçn, v¡ thúc hiÎn quy trÖnh n¡y cho ½Æn tºn khi h·m c−n.

(2) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü thúc hiÎn quy trÖnh xø lû b±ng viÎc sø dòng riÅng biÎt hÎ thâng t¸y cń ½Ì khø bÞ cń ½Æn möc cń phï t¸y gi¨m xuâng tèi giŸ trÙ quy ½Ùnh trong B¨ng 4-8 hoć nhÞ hçn.

(3) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü ch× thï nõèc d±n s−ch. (4) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü kháng thï ch¶t lÞng ½æc th÷a thu gom trÅn t¡u. (5) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü chê ch¶t cÜ ½iÌm nÜng chÿ th¶p hçn 15oC.

B¨ng 4-4 Nhùng quy ½Ùnh ½âi vèi t¡u mèi chê ch¶t giâng d·u mÞ

Phµn lo−i ch¶t Quy ½Ùnh ½âi vèi t¡u mèi

Phï thÞa m¬n nhùng quy ½Ùnh nÅu ê Ph·n 3 Ÿp dòng ½âi vèi t¡u chê d·u thõçng ph¸m.

Ch¶t lo−i C Phï thÞa m¬n nhùng quy ½Ùnh nÅu ê Chõçng 2 TCVN 6259-8E: 2003 T¡u chê xá hoŸ ch¶t nguy hiÌm Ÿp dòng ½âi vèi t¡u lo−i 3.

ThiÆt bÙ ghi v¡ kiÌm sÜat viÎc x¨ d·u quy ½Ùnh ê 3.3.1-6 Ph·n 3 phï thÏch hìp ½Ì kiÌm tra ch¶t giâng d·u mÞ ½õìc chê.

Phï thÞa m¬n nhùng quy ½Ùnh nÅu ê Ph·n 3 Ÿp dòng ½âi vèi t¡u chê d·u thõçng ph¸m

Ch¶t lo−i D ThiÆt bÙ ghi v¡ kiÌm soŸt viÎc x¨ d·u nÅu ê 3.3.1-6 Ph·n 3 phï thÏch hìp ½Ì kiÌm tra cŸc ch¶t giâng d·u mÞ ½õìc chê.

77

TCVN 6276 : 2003, Ph·n 4, Chõçng 4

chõçng 3 KÆt c¶u v¡ thiÆt bÙ cho t¡u hiÎn cÜ


Nhùng yÅu c·u cða Chõçng n¡y ½õìc Ÿp dòng ½âi vèi t¡u hiÎn cÜ. 3.2 YÅu c·u vË l°p ½´t kÆt c¶u v¡ thiÆt bÙ 3.2.1 ThiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i

1 ‡âi vèi t¡u hiÎn cÜ, thiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i quy ½Ùnh trong B¨ng 4-5 phï ½õìc trang bÙ phï hìp vèi lo−i v¡ lû tÏnh cða ch¶t lÞng ½æc h−i ½õìc chuyÅn chê v¡ vïng biÌn thï.

2 ‡âi vèi t¡u dú ½Ùnh khø cń ch¶t lÞng ½æc h−i cÜ Ÿp su¶t bay hçi võìt quŸ 5 kPa ê 20oC b±ng tháng giÜ, thÖ hÎ thâng l¡m s−ch b±ng tháng giÜ phï ½õìc l°p ½´t bä sung v¡o nhùng yÅu c·u quy ½Ùnh ê 3.2.1-1.

3 B¶t kÌ nhùng yÅu c·u nÅu ê 3.2.1-1 v¡ 3.2.1-2, hÎ thâng ng¯n ng÷a thï ch¶t lÞng ½æc h−i quy ½Ùnh l°p ½´t trÅn t¡u thÞa m¬n yÅu c·u (1) v¡ (2) dõèi ½µy l¡ k¾t d±n cŸch ly, hÎ thâng hµm h¡ng (ch× gièi h−n ½âi vèi t¡u chê ch¶t lo−i B cÜ ½iÌm nÜng chÿ t÷ 15oC trê lÅn) v¡ trang thiÆt bÙ ½Ì x¨ v¡o phõçng tiÎn tiÆp nhºn.

(1) Khi t¡u cÜ dú ½Ùnh chuyÅn chê nhiËu l·n trong måi h·m ch× mæt ch¶t lÞng ½æc h−i hoć ch¶t tõçng thÏch (nghØa l¡ mæt ch¶t trong cŸc ch¶t lÞng ½æc h−i kháng yÅu c·u phï røa h·m h¡ng ½Ì xuâng h¡ng sau khi h·m h¡ng ½¬ chöa mæt ch¶t lÞng ½æc h−i khŸc v¡ ½¬ dë hÆt ch¶t n¡y).

(2) Khi t¡u ch× tiÆn h¡nh thï nõèc røa h·m thu gom ½õìc t÷ viÎc l¡m s−ch h·m h¡ng v¡o cŸc phõçng tiÎn tiÆp nhºn thÏch hìp trõèc khi t¡u søa chùa hoć lÅn ½¡.

4 B¶t kÌ nhùng yÅu c·u nÅu ê 3.2.1-1 ½Æn 3.2.1-3, thiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i trang bÙ trÅn t¡u chê ch¶t lÞng ½æc h−i cÜ Ÿp su¶t hçi võìt quŸ 5 kPa ê 20oC dú ½Ùnh khø cń b±ng tháng giÜ phï l¡ hÎ thâng l¡m s−ch b±ng tháng giÜ.

3.2.2 Nhùng yÅu c·u ½ć biÎt ½âi vèi t¡u hiÎn cÜ chê ch¶t lo−i A, lo−i B hoć lo−i C.

T¡u hiÎn cÜ chê ch¶t lo−i A, lo−i B hoć lo−i C phï thÞa m¬n nhùng yÅu c·u cða Bæ Luºt chê xá hoŸ ch¶t Ÿp dòng ½âi vèi cŸc t¡u nÅu trong cŸc quy ½Ùnh cða Bæ Luºt ½õìc nÅu trong B¨ng 4-6 phï hìp vèi cáng dòng v¡ ng¡y ½Üng t¡u. Tuy nhiÅn, t¡u chê xá khÏ hoŸ lÞng thÞa m¬n nhùng yÅu c·u riÅng ½õìc quy ½Ùnh bêi ‡¯ng kiÌm, dú ½Ùnh chê ch¶t lÞng ½æc h−i nÅu ê B¨ng 4.1(5) cÜ thÌ ½õìc miÍm gi¨m.

3.2.3 Nhùng yÅu c·u ½ć biÎt cho t¡u hiÎn cÜ chê ch¶t giâng d·u mÞ.

Ngo¡i nhùng yÅu c·u 3.2.1 v¡ 3.2.2, t¡u d·u chê xá ch¶t lÞng ½æc h−i giâng d·u mÞ, v¡ kháng chê cŸc ch¶t lÞng ½æc h−i khŸc vèi ch¶t giâng d·u mÞ, cÜ dú ½Ùnh thï cń b±ng viÎc sø dòng trang thiÆt bÙ quy ½Ùnh ê Ph·n 3, phï thÞa m¬n nhùng yÅu c·u cða B¨ng 4-7 phï hìp vèi viÎc phµn lo−i ch¶t giâng d·u mÞ ½õìc chê.

3.2.4 Nhùng yÅu c·u ½ć biÎt ½âi vèi t¡u hiÎn cÜ ch−y vïng h−n chÆ.

B¶t kÌ nhùng yÅu c·u ê 3.2.1-1, t¡u cÜ vïng ho−t ½æng h−n chÆ nÆu ½õìc ‡¯ng kiÌm x¾t th¶y phï hìp cÜ thÌ kháng phï trang bÙ hÎ thâng t¸y cń.

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TCVN 6276 : 2003, Ph·n 4, Chõçng 3

B¨ng 4-5 ThiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i trÅn t¡u hiÎn cÜ

Phµn lo−i ch¶t Lo−i A Lo−i B Lo−i C Lo−i D

ThiÆt bÙ

Vïng biÌn thï

T¶t c¨ cŸc

vïng


Trong vïng

½ć biÎt


Trong vïng ½ć biÎt

T¶t c¨ cŸc

vïng Lû tÏnh T¶t c¨

cŸc ch¶t


cao hoć

hoŸ r°n


th¶p hoć

kháng hoŸ r°n

T¶t c¨ cŸc ch¶t


cao hoć

hoŸ r°n


th¶p hoć

kháng hoŸ r°n


cao hoć

hoŸ r°n


th¶p hoć

kháng hoŸ r°n

Tµt c¨ cŸc ch¶t

ThiÆt bÙ røa × (Chî

thÏch 1)

× × (Chî

thÏch 2)

× × × (Chî

thÏch 2)

× × (Chî

thÏch 2)

⎯

HÎ thâng t¸y cń ⎯ × × ⎯

Lå x¨ dõèi ½õéng nõèc (Chî thÏch 4)

× (Chî thÏch 5)

×

(Chî thÏch 5)

×

(Chî thÏch 5)

⎯

Trang thiÆt bÙ x¨ v¡o cáng trÖnh tiÆp nhºn

× ×

(Chî thÏch 6)

×

(Chî thÏch 6)

× (Chî thÏch 6)

HÎ thâng hµm h¡ng

⎯ × (Chî thÏch 7) ⎯ ⎯

ThiÆt bÙ ghi thï cń

⎯ × (Chî thÏch 4) (Chî thÏch 8)

⎯ ⎯

HÎ thâng nõèc pha lo¬ng

⎯ ⎯ ⎯ ×

Kû hiÎu × : Phï trang bÙ ⎯ : Kháng yÅu c·u trang bÙ Chî thÏch

(1) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü cÜ kh¨ n¯ng thï hån hìp cń/nõèc v¡o cŸc phõçng tiÎn tiÆp nhºn cho ½Æn tºn khi nãng ½æ ch¶t ½æc h−i chöa trong dÝng nõèc thï ½õìc gi¨m xuâng tèi giŸ trÙ quy ½Ùnh trong B¨ng 4-1(1) hoć nhÞ hçn, v¡ thúc hiÎn quy trÖnh n¡y cho ½Æn tºn khi h·m c−n.

(2) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü thúc hiÎn quy trÖnh xø lû b±ng viÎc sø dòng riÅng hÎ thâng t¸y cń ½Ì khø bÞ cń ½Æn möc cń cÝn l−i gi¨m xuâng tèi giŸ trÙ nÅu trong B¨ng 4-8 hoć nhÞ hçn.

(3) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü l¡m gi¨m thÌ tÏch cń phï t¸y b±ng viÎc sø dòng riÅng biÎt hÎ thâng t¸y cń xuâng tèi 0,3 m3 hoć nhÞ hçn.

(4) Kháng yÅu c·u trõèc ng¡y 31 thŸng 12 n¯m 1987. (5) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü ch× thï nõèc d±n s−ch. (6) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü kháng thï ch¶t lÞng ½æc th÷a thu gom trÅn t¡u. (7) CÜ thÌ miÍn quy ½Ùnh n¡y cho t¡u b¶t kü chê ch¶t cÜ ½iÌm nÜng chÿ th¶p hçn 15oC. (8) ‡õìc gièi h−n theo chî thÏch 1 cða B¨ng 4-8.

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TCVN 6276 : 2003, Ph·n 4, Chõçng 4

B¨ng 4-6 Nhùng quy ½Ùnh ½âi vèi t¡u hiÎn cÜ chê ch¶t lo−i A, làai B hoć lo−i C

TuyÆn h¡ng hï Théi ½iÌm ½´t sâng chÏnh

hoć kû hìp ½ãng ½Üng mèi

‡iËu kho¨n Ÿp dòng cða Bæ Luºt chê xá hÜa ch¶t

T¡u hiÎn cÜ thúc hiÎn T¡u cÜ hìp ½ãng ½Üng mèi kû trõèc ng¡y 2 thŸng 11 n¯m 1973

1.7.3

chuyÆn ½i quâc tÆ T¡u cÜ hìp ½ãng ½Üng mèi kû v¡o ng¡y v¡ sau ng¡y 12 thŸng 11 n¯m 1973

1.7.2

T¡u hiÎn cÜ kháng phï T¡u cÜ sâng chÏnh ½õìc ½´t trõèc ng¡y 1 thŸng 7 n¯m 1983

1.7.3*

l¡ t¡u nÅu trÅn T¡u cÜ sâng chÏnh ½õìc ½´t v¡o ng¡y v¡ sau ng¡y 1 thŸng 7 n¯m 1983

1.7.2

Kû hiÎu

* T¡u hiÎn cÜ nhÞ hçn 1600 t¶n ½¯ng kû ½õìc ½Ÿnh d¶u sao phï thÞa m¬n nhùng quy ½Ùnh cða Bæ luºt vË kÆt c¶u v¡ thiÆt bÙ v¡o ng¡y 1 thŸng 7 n¯m 1994.

B¨ng 4-7 Nhùng qui ½Ùnh ½âi vèi t¡u hiÎn cÜ chê ch¶t giâng d·u mÞ

Phµn lo−i ch¶t YÅu c·u ½âi vèi t¡u hiÎn cÜ

Phï thÞa m¬n nhùng quy ½Ùnh nÅu ê Ph·n 3 Ÿp dòng ½âi vèi t¡u chê hÜa ch¶t

Ch¶t lo−i C Phï thÞa m¬n nhùng quy ½Ùnh nÅu trong Bæ luºt chê xá hÜa ch¶t ½õìc Ÿp dòng theo ½iËu kho¨n 3.2.2 ê trÅn, Ÿp dòng ½âi vèi t¡u lo−i 3

ThiÆt bÙ ghi v¡ kiÌm sÜat viÎc x¨ d·u quy ½Ùnh ê 3.3.1-6 Ph·n 3 phï thÏch hìp ½Ì kiÌm tra cŸc ch¶t giâng d·u ½õìc chuyÅn chê.

Phï thÞa m¬n nhùng quy ½Ùnh nÅu ê Ph·n 3 Ÿp dòng ½âi vèi t¡u chê hÜa ch¶t

Ch¶t lo−i C ThiÆt bÙ ghi v¡ kiÌm soŸt viÎc x¨ d·u quy ½Ùnh ê 3.3.1-6 Ph·n 3 phï thÏch hìp ½Ì kiÌm tra cŸc ch¶t giâng d·u ½õìc chuyÅn chê.

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TCVN 6276 : 2003, Ph·n 4, Chõçng 4

chõçng 4 thiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i

4.1 Qui ½Ùnh chung 4.1.1 Ph−m vi Ÿp dòng.

1 Nhùng qui ½Ùnh cða Chõçng n¡y Ÿp dòng ½âi vèi thiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i l°p ½´t trÅn t¡u chê xá ch¶t lÞng ½æc h−i phï hìp nhùng qui ½Ùnh cða Chõçng 2 hoć Chõçng 3.

2 ThiÆt bÙ ng¯n ng÷a thï ch¶t lÞng ½æc h−i phï thÞa m¬n nhùng yÅu c·u 1.3.1-5 ½Æn 1.3.1-8 cða TCVN 6259-3 : 2003 HÎ thâng mŸy t¡u.

4.2 HÎ thâng røa sç bæ 4.2.1 Quy ½Ùnh chung

HÎ thâng røa sç bæ phï thÞa m¬n nhùng yÅu c·u 4.2.2 ½Æn 4.2.4 phï hìp vèi lû tÏnh cða ch¶t lÞng ½æc h−i ½õìc chuyÅn chê.

4.2.2 ThiÆt bÙ røa

1 Khi chuyÅn chê ch¶t lo−i A hoć ch¶t hoŸ r°n, thiÆt bÙ røa phï ½õìc ½´t t−i vÙ trÏ sao cho t¶t c¨ bË m´t k¾t cÜ thÌ ½õìc røa trúc tiÆp bêi Ÿp lúc cða dÝng nõèc røa, s¨n lõìng v¡ t·m vèi cða vÝi phun.

Khi chuyÅn chê ch¶t lo−i B hoć C, thiÆt bÙ røa phï ½õìc ½´t t−i vÙ trÏ ½õìc ch¶p nhºn, sao cho cáng viÎc røa k¾t ½õìc thúc hiÎn bêi cŸc ½·u quay ½õìc ho−t ½æng b±ng Ÿp su¶t thuý lúc ½ð m−nh.

2 ThiÆt bÙ røa phï chÙu ½õìc ¯n mÝn ½âi vèi ch¶t lÞng ½æc h−i. 4.2.3 Bçm phòc vò thiÆt bÙ røa.

1 Bçm phòc vò thiÆt bÙ røa phï cÜ kh¨ n¯ng cung c¶p ½ð nõèc røa ½Ì thiÆt bÙ røa tho¨ m¬n quy ½Ùnh 4.2.2-1 yÅu c·u.

2 ‡Ì h−n chÆ lõìng nõèc trong k¾t trong quŸ trÖnh røa k¾t, phï cÜ cŸc biÎn phŸp nh±m x¨ liÅn tòc cń làc qua bçm ½æc lºp vèi bçm nõèc røa quy ½Ùnh ê 4.2.2-1, v¡ khuyÆn khÏch sø dòng nõèc tu·n ho¡n.

4.2.4 HÎ thâng hµm nÜng nõèc røa

‡âi vèi cŸc t¡u dú ½Ùnh chuyÅn chê cŸc ch¶t ½áng ½ć hoć cŸc ch¶t cÜ ½æ nhèt t÷ 25 mPa.s trê lÅn ê nhiÎt ½æ 20oC thÖ mæt hÎ thâng hµm phï ½õìc l°p ½´t sao cho cáng viÎc røa cÜ thÌ tiÆn h¡nh vèi nõèc nÜng t÷ 60oC trê lÅn, tr÷ khi tÏnh ch¶t cða t¶t c¨ cŸc ch¶t nhõ vºy kháng thÏch hìp ½Ì røa b±ng nõèc.

4.3 HÎ thâng t¸y cń 4.3.1 Quy ½Ùnh chung

HÎ thâng t¸y cń phï cÜ kh¨ n¯ng t¸y ch¶t lÞng ½æc h−i ê ½Ÿy k¾t hoć b±ng bçm hoć b±ng mŸy phun khi k¾t h¡ng ½õìc røa.

4.3.2 N¯ng lúc cða hÎ thâng t¸y cń.

HÎ thâng t¸y cń phï cÜ kh¨ n¯ng khø bÞ ch¶t lÞng ½æc h−i ½Æn thÌ tÏch nÅu ê b¨ng 4-8 phï hìp vèi ng¡y ½´t sâng chÏnh cða t¡u v¡ phµn lo−i ch¶t cða ch¶t lÞng ½æc h−i.

4.3.3 HÎ thâng thäi

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TCVN 6276 : 2003, Ph·n 4, Chõçng 4

‡Ì t¯ng n¯ng lúc cða hÎ thâng t¸y cń quy ½Ùnh ê 4.3.2 phï trang bÙ mæt hÎ thâng thäi.

B¨ng 4-8 N¯ng lúc cða hÎ thâng t¸y cń

Phµn lo−i t¡u Lõìng cń t¸y cÝn l−i

Ch¶t lo−i B Ch¶t lo−i C

T¡u mèi 0,1 m3 hoć nhÞ hçn 0,3 m3 hoć nhÞ hçn

T¡u hiÎn cÜ 0,3 m3 hoć nhÞ hçn (Chî thÏch 1) 0,9 m3 hoć nhÞ hçn (Chî thÏch 2)

Chî thÏch :

1. Täng thÌ tÏch cða cń t¸y ½õìc yÅu c·u (täng cða lõìng cń xŸc ½Ùnh theo phµn tÏch nõèc v¡ lõìng cń xŸc ½Ùnh theo tÏnh toŸn cń bŸm trÅn bË m´t k¾t) cÜ thÌ b±ng 1m3 hoć 1/3000 thÌ tÏch k¾t, l¶y giŸ trÙ n¡o lèn hçn tÏnh ½Æn ng¡y 2 thŸng 10 n¯m 1994.

2. Täng thÌ tÏch cða cń t¸y ½õìc yÅu c·u cÜ thÌ b±ng 3m3 hoć 1/1000 thÌ tÏch k¾t, l¶y giŸ trÙ n¡o lèn hçn tÏnh ½Æn ng¡y 2 thŸng 10 n¯m 1994.

4.4 ThiÆt bÙ thï dõèi ½õéng nõèc 4.4.1 Qui ½Ùnh chung

ThiÆt bÙ thï dõèi ½õéng nõèc bao gãm cŸc lå x¨ ngo¡i m−n dõèi ½õéng nõèc, bçm x¨ v¡ ½õéng âng x¨. 4.4.2 Bâ trÏ lå x¨

1 HÎ thâng thï dõèi ½õéng nõèc phï ½õìc ½´t trong khu vúc h¡ng ê ph−m vi lµn cºn vïng tán háng nh±m ½Ë phÝng ch¶t lÞng ½æc h−i quay trê l−i t¡u do l¶y nõèc biÌn v¡o t¡u.

2 Khi trang bÙ hai lå x¨ nh±m nµng cao hiÎu su¶t thï thÖ phï bâ trÏ chîng ê hai bÅn m−n t¡u. 4.4.3 KÏch thõèc lå x¨

1 Bâ trÏ thï dõèi ½õéng nõèc phï ½¨m bö sao cho cń hoć hån hìp cń/nõèc ½õìc thï xuâng biÌn kháng ½i qua lèp biÅn t¡u. Trong trõéng hìp n¡y, khi thï ½õìc tiÆn h¡nh bÖnh thõéng ê tán m−n, thÖ ½õéng kÏnh lå x¨ kháng ½õìc nhÞ hçn giŸ trÙ tÏnh theo cáng thöc sau :

D = QD/5L Trong ½Ü :

D : ‡õéng kÏnh nhÞ nh¶t cða lå x¨ (m) L : Kho¨ng cŸch t÷ ½õéng vuáng gÜc mñi ½Æn lå x¨ (m) QD : Cõéng ½æ x¨ lèn nh¶t ½õìc chàn m¡ t¡u cÜ thÌ thï ch¶t lÞng ½æc h−i tháng qua lå x¨ (m3/h)

2 Khi thï hõèng theo mæt gÜc so vèi tán m−n, cáng thöc quy ½Ùnh ê 4.4.3-1 phï ½õìc bä sung cho QD hÎ sâ so vèi QD cða viÎc thï bÖnh thõéng ê tán m−n.

4.4.4 Bçm thï

Bçm thï phï cÜ s¨n lõìng ½ð ½Ì x¨ hån hìp cń/nõèc.

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4.5 ThiÆt bÙ ghi thï cń 4.5.1 Qui ½Ùnh chung

ThiÆt bÙ ghi thï cń gãm mæt bçm thï, thiÆt bÙ tÏnh théi gian v¡ thiÆt bÙ ghi thï. 4.5.2 Bçm thï

1 Bçm thï phï cÜ kh¨ n¯ng ½iËu ch×nh ½õìc cõéng ½æ thï v¡ tho¨ m¬n nhùng yÅu c·u (1) hoć (2) sau ½µy :

(1) Phï cÜ kh¨ n¯ng ½iËu ch×nh cõéng ½æ thï b±ng cŸch thay ½äi tâc ½æ hoć b±ng dòng cò tiÆt lõu ½´t trong ½õéng âng x¨.

(2) Phï cÜ cõéng ½æ thï kháng ½äi kháng võìt quŸ cõéng ½æ thï cho ph¾p. Cõéng ½æ thï cho ph¾p nghØa l¡ (a) hoć (b) dõèi ½µy l¶y giŸ trÙ n¡o nhÞ hçn : (a) Cõéng ½æ thï lèn nh¶t ½õìc sø dòng trong quy ½Ùnh 4.4.3. (b) Khi cń hoć hån hìp cń/nõèc ½õìc thï t÷ k¾t l°ng, giŸ trÙ n¡y ½õìc ‡¯ng KiÌm quy ½Ùnh riÅng

phï hìp vèi ½ć tÏnh cða cń.

2 Bçm thÞa m¬n yÅu c·u -1(1) nÅu trÅn phï ½õìc trang bÙ thiÆt bÙ ch× bŸo lõu lõìng.

3 Bçm cÜ thÌ ½õìc sø dòng kÆt hìp vèi bçm quy ½Ùnh ê 4.4.4. 4.5.3 ThiÆt bÙ ghi théi gian

ThiÆt bÙ ghi théi gian phï cÜ kh¨ n¯ng ghi théi ½iÌm khêi ½æng töc thÖ v¡ théi ½iÌm ng÷ng thï. Tuy nhiÅn, ng¡y thŸng cÜ thÌ ½õìc ghi b±ng tay hoć tú ½æng.

4.5.4 ThiÆt bÙ ghi cõéng ½æ thï

ThiÆt bÙ ghi cõéng ½æ thï phï cÜ kh¨ n¯ng ½o ½õìc lõu lõìng v¡ ghi l−i kÆt qu¨ ½o ½õìc. Dung sai cða thiÆt bÙ ghi cõéng ½æ thï n±m trong kho¨ng ±15% cða lõu lõìng töc théi.

4.5.5 Tõçng ½õçng

Phï cÜ cŸc dòng cò sø dòng b±ng tay thÏch hìp ½Ì sø dòng khi cŸc thiÆt bÙ ghi tho¨ m¬n yÅu c·u 4.5.3 v¡ 4.5.4 xÿ ra hÞng hÜc, v¡ cŸc dòng cò n¡y phï ½¨m bö cÜ thÌ sø dòng tât trong khÞang théi gian Ït nh¶t 60 ng¡y.

4.6 ThiÆt bÙ x¨ v¡o phõçng tiÎn tiÆp nhºn 4.6.1 Qui ½Ùnh chung

1 ThiÆt bÙ x¨ v¡o phõçng tiÎn tiÆp nhºn phï cÜ ½õéng âng x¨ ½Ì nâi v¡o phõçng tiÎn tiÆp nhºn khi x¨ ch¶t lÞng ½æc h−i v¡ phï ½´t trÅn boong trâng ê c¨ hai bÅn m−n t¡u.

2 ‡âi vèi t¡u dú ½Ùnh x¨ hån hìp cń/nõèc thu gom ½õìc t÷ røa k¾t v¡o phõçng tiÎn tiÆp nhºn kháng tháng qua cŸc thiÆt bÙ thï cða t¡u thÖ ‡¯ng kiÌm cÜ thÌ xem x¾t riÅng ½Ì gi¨m nhÂ nhùng yÅu c·u nÅu ê 4.6.1-1.

4.7 HÎ thâng nõèc pha lo¬ng 4.7.1 Quy ½Ùnh chung

HÎ thâng nõèc pha lo¬ng phï ½õìc trang bÙ bçm, ½õéng âng nõèc v¡ s¨n lõìng bçm phï ½¨m bö lõìng nõèc g¶p 9 l·n trê lÅn täng lõìng cń ½õìc pha lo¬ng.

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4.8 HÎ thâng hµm h¡ng 4.8.1 Quy ½Ùnh chung

1 HÎ thâng hµm h¡ng phï cÜ kh¨ n¯ng hµm nÜng hiÎu qu¨ cŸc ch¶t lÞng ½æc h−i ½õìc chuyÅn chê.

2 HÎ thâng hµm h¡ng phï ½´t trong k¾t kháng cÜ vŸch chung vèi b¶t kü cç c¶u n¡o cða tán vÞ m−n. 4.9 HÎ thâng l¡m s−ch b±ng tháng giÜ 4.9.1 Quy ½Ùnh chung

HÎ thâng l¡m s−ch b±ng tháng giÜ bao gãm thiÆt bÙ tháng giÜ v¡ thiÆt bÙ kiÌm ½Ùnh. 4.9.2 ThiÆt bÙ tháng giÜ

ThiÆt bÙ tháng giÜ phï tho¨ m¬n nhùng yÅu c·u t÷ (1) ½Æn (5) sau ½µy :

(1) S¨n lõìng phï ½¨m bö sao cho luãng kháng khÏ ½−t tèi ½Ÿy cða k¾t c·n tháng v¡ s¨n lõìng n¡y ½õìc tÏnh theo HÖnh 4-1.

(2) ThiÆt bÙ tháng giÜ phï ½´t ê lå kho¾t cða k¾t g·n cŸc ½·u hît khá hoć hâ tò cða k¾t.

(3) Phï ½õìc bâ trÏ, l°p ½´t sao cho luãng kháng khÏ ½õìc ½Ùnh hõèng tèi cŸc hâ tò hoć ½·u hît khá cða k¾t c¡ng sŸt c¡ng tât, v¡ trŸnh cŸc tŸc ½æng trúc tiÆp cða luãng khÏ v¡o cŸc th¡nh ph·n kÆt c¶u cða k¾t.

(4) Phï cÜ cŸc biÎn phŸp ½Ì ½¨m bö cń ½õìc l¶y ra t÷ cŸc ½õéng âng hît khá tõçng öng.

(5) ThiÆt bÙ tháng giÜ phï chÙu ½õìc ¯n mÝn cða cŸc ch¶t lÞng ½æc h−i hoć khÏ trç. 4.9.3 ThiÆt bÙ kiÌm ½Ùnh

ThiÆt bÙ kiÌm ½Ùnh phï cÜ kh¨ n¯ng xŸc ½Ùnh ½õìc lõìng cń nhÖn th¶y ½õìc cÝn l−i trong k¾t v¡ hiÎu qu¨ cða cáng viÎc l¡m s−ch b±ng tháng giÜ nhé kiÌm tra hoć b±ng m°t thõéng hoć b±ng cŸc biÎn phŸp khŸc tõçng ½õçng.

4.9.4 Ÿp dòng Qui ph−m Phµn c¶p v¡ ½Üng t¡u biÌn vÞ th¾p

Khi cń ½õìc t¸y ra khÞi k¾t b±ng cŸc biÎn phŸp cða hÎ thâng l¡m s−ch b±ng tháng giÜ, phï kiÌm tra cŸc biÎn phŸp an to¡n liÅn quan ½Æn chŸy nä v¡ ½æc h−i, v¡ phï thÞa m¬n yÅu c·u 4.9 cða Ph·n n¡y cñng nhõ nhùng yÅu c·u tõçng öng cða TCVN 6259:2003 Qui ph−m Phµn c¶p v¡ ½Üng t¡u biÌn vÞ th¾p.

4.10 K¾t d±n cŸch ly 4.10.1 Quy ½Ùnh chung

Dung tÏch cða k¾t d±n cŸch ly phï ½¨m bö sao cho chiËu chÖm v¡ ½æ chîi cða t¡u tho¨ m¬n nhùng yÅu c·u t÷ (1) ½Æn (3) sau ½µy khi ch× cÜ nhùng k¾t d±n cŸch ly liÅn quan ½õìc bçm ½·y nõèc d±n :

(1) ChiËu chÖm cða t¡u t−i giùa t¡u l¶y giŸ trÙ ½õìc xŸc ½Ùnh theo cáng thöc dõèi ½µy hoć lèn hçn : 1,550 + 0,023 Lf (m)

(2) ‡æ chîi ½uái l¶y giŸ trÙ xŸc ½Ùnh theo cáng thöc dõèi ½µy hoć nhÞ hçn : 1,600 + 0,013 Lf (m)

(3) Chµn vÙt cða t¡u phï ngºp ho¡n to¡n trong nõèc.

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Lõu

lõìn

g nh

Þ nh

¶t ½

âi v

èi t÷

ng c

øa n−p

(m3 /p

hît)

300 mm

150 mm

230 mm

‡õéng

kÏnh

tron

g =

610

mm

460 m

m

600

500

400

300

200

10 20 30 38,1

T·m xuyÅn tèi cða luãng kháng khÏ n−p (m)

HÖnh 4-1 Lõu lõìng nhÞ nh¶t l¡ mæt h¡m sâ cða t·m xuyÅn tèi cða luãng kháng khÏ

T·m xuyÅn tèi cða luãng kháng khÏ ½õìc ½âi chiÆu vèi chiËu cao k¾t

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Ph·n 5 KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u



Nhùng qui ½Ùnh trong Ph·n n¡y Ÿp dòng cho KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u ½õìc ½´t trÅn t¡u v¡ trÅn cŸc d¡n khoan biÌn v¡ nhùng s¡n näi khŸc sø dòng ½Ì khai thŸc khoŸng s¨n ½Ÿy biÌn.

1.1.2 YÅu c·u vË trang bÙ

T¡u d·u cÜ täng dung tÏch t÷ 150 trê lÅn, cŸc t¡u khŸc kháng ph¨i l¡ t¡u d·u cÜ täng dung tÏch t÷ 400 trê lÅn v¡ cŸc d¡n khoan biÌn v¡ cŸc s¡n näi khŸc sø dòng ½Ì khai thŸc khoŸng s¨n ½Ÿy biÌn ph¨i ½´t câ ½Ùnh KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u ½õìc ‡¯ng kiÌm duyÎt ê mæt vÙ trÏ s³n s¡ng sø dòng.

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Chõçng 2 YÅu c·u kþ thuºt 2.1 Qui ½Ùnh chung 2.1.1 Lõu û khi lºp KÆ ho−ch öng cöu

KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u phï ½õìc lºp cÜ x¾t ½Æn tháng tin cç b¨n vË t¡u gãm kiÌu v¡ kÏch thõèc cða t¡u, h¡ng hoŸ v¡ tuyÆn ho−t ½æng sao cho KÆ ho−ch kh¨ thi v¡ dÍ sø dòng.

2.1.2 Ngán ngù.

KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u phï ½õìc so−n thö b±ng ngán ngù l¡m viÎc cða thuyËn trõêng v¡ sþ quan cða t¡u. NÆu ngán ngù sø dòng trong b¨n KÆ ho−ch kháng phï l¡ tiÆng Anh thÖ phï cÜ b¨n dÙch tiÆng Anh k¿m theo. ‡âi vèi t¡u kháng thúc hiÎn cŸc chuyÆn ½i quâc tÆ thÖ ‡¯ng kiÌm cÜ thÌ xem x¾t riÅng trong t÷ng trõéng hìp cò thÌ.

2.2 H−ng mòc trong KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u 2.2.1 Thð tòc bŸo cŸo sú câ á nhiÍm d·u.

1 Trong KÆ ho−ch phï quy ½Ùnh r±ng thuyËn trõêng hoć sþ quan trúc ca phï tháng bŸo ngay lºp töc sú thï töc théi hoć dú kiÆn tèi Quâc gia ven biÌn g·n nh¶t.

2 CŸc mòc t÷ (1) ½Æn (7) dõèi ½µy phï ½õa v¡o h−ng mòc bŸo cŸo :

(1) TÅn t¡u, há hiÎu, cé, kÏch cë v¡ kiÌu t¡u.

(2) Ng¡y thŸng v¡ théi gian xÿ ra sú câ, vÙ trÏ, h¡nh trÖnh, tâc ½æ.

(3) TÅn tr−m vá tuyÆn, ng¡y thŸng v¡ théi gian bŸo cŸo tiÆp theo, lo−i v¡ sâ lõìng h¡ng/ k¾t chöa trÅn t¡u, chð h¡ng.

(4) Chi tiÆt tÜm t°t vË khuyÆt tºt/lõìng thiÆu hòt/tän th¶t.

(5) Chi tiÆt tÜm t°t vË á nhiÍm bao gãm lo−i d·u, lõìng tän th¶t õèc tÏnh, nguyÅn nhµn tr¡n d·u, kh¨ n¯ng tr¡n d·u tiÆp theo, ½iËu kiÎn théi tiÆt v¡ biÌn.

(6) Chi tiÆt liÅn hÎ vèi chð t¡u/ nh¡ qu¨n lû/½−i lû bao gãm ½Ùa ch× bõu ½iÎn, sâ ½iÎn tho−i v¡ sâ Fax.

(7) CŸc ho−t ½æng châng tr¡n d·u v¡ hõèng dÙch chuyÌn cða t¡u. 2.2.2 Danh sŸch cŸc Tä chöc hoć CŸ nhµn c·n liÅn hÎ trong trõéng hìp xÿ ra sú câ á nhiÍm d·u.

CŸc mâi liÅn hÎ vèi Quâc gia ven biÌn, c¨ng v¡ t¡u m¡ t¡u cÜ quan hÎ, vÏ dò nhõ chð/ngõéi ½iËu h¡nh, ½−i lû, chð h¡ng, ngõéi bö hiÌm, l¡ nhùng ngõéi c·n thiÆt phï liÅn hÎ nÆu t¡u liÅn quan ½Æn tai n−n á nhiÍm d·u phï ½õìc lÅn danh sŸch v¡ ½õa v¡o Phò lòc.

2.2.3 CŸc ho−t ½æng xø lû trúc tiÆp trÅn t¡u nh±m lo−i bÞ hoć kiÌm soŸt sú thï sau tai n−n.

1 Ït nh¶t cŸc h−ng mòc t÷ (1) ½Æn (3) sau ½µy phï ½õìc ½õa v¡o h−ng mòc cŸc ho−t ½æng châng d·u tr¡n :

(1) B¨n miÅu t¨ chi tiÆt cŸc h¡nh ½æng nh±m khø bÞ hoć kiÌm soŸt sú thï d·u v¡ ngõéi trúc ca.

(2) Qui trÖnh khø bÞ d·u loang v¡ chöa thÏch hìp cho d·u ½õìc khø, v¡ vºt liÎu l¡m s−ch.

(3) Quy trÖnh chuyÌn d·u t÷ t¡u sang t¡u khŸc.

2 Ït nh¶t cŸc mòc t÷ (1) ½Æn (3) dõèi ½µy phï ½õìc ½õa v¡o KÆ ho−ch châng d·u tr¡n do tai n−n :

(1) œu tiÅn h¡ng ½·u l¡ ½¨m bö an to¡n cho ngõéi v¡ t¡u.

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(2) B¨n tháng bŸo chi tiÆt vË möc ½æ tän th¶t cho t¡u v¡ do tai n−n d·u tr¡n gµy ra phï ½õìc tºp hìp v¡ õèc lõìng sao cho cÜ thÌ tiÆn h¡nh cŸc ho−t ½æng nh±m ng¯n chń sú câ tiÆp theo cða tai n−n.

(3) B¨n hõèng d¹n chi tiÆt vË än ½Ùnh v¡ nhùng lõu û vË öng su¶t hoć danh mòc tháng bŸo c·n thiÆt ½Ì ½Ÿnh giŸ ½´t t−i v¯n phÝng Chð t¡u hoć bÅn liÅn quan khŸc.

2.2.4 Thð tòc v¡ ½iÌm liÅn l−c trÅn t¡u nh±m xŸc ½Ùnh to− ½æ ho−t ½æng cða t¡u theo chõçng trÖnh phÝng châng á

nhiÍm Quâc gia v¡ Khu vúc.

1 Phï quy ½Ùnh trong KÆ ho−ch r±ng thuyËn trõêng v¡ sþ quan trúc ca khŸc cða t¡u phï liÅn l−c vèi quâc gia ven bé cÜ chð quyËn trõèc khi tiÆn h¡nh cŸc ho−t ½æng nh±m h−n chÆ sú thï.

2 Trong KÆ ho−ch phï cÜ B¨n hõèng d¹n ½·y ½ð cho thuyËn trõêng cða t¡u trong cŸc ho−t ½æng kiÌm tra á nhiÍm ½¬ ½õìc triÌn khai theo sú ½Ë xõèng cða chð t¡u.

3 Phï cÜ trong Phò lòc tháng tin vË cŸc hÎ thâng v¡ cŸch tä chöc liÅn ho¡n cða cŸc quâc gia ven bé dàc theo tuyÆn thõçng m−i cða t¡u.

2.2.5 Tháng tin khŸc

‡¯ng kiÌm cÜ thÌ yÅu c·u bä sung v¡o cŸc h−ng mòc qui ½Ùnh ê 2.2.1 ½Æn 2.2.4 nhùng tháng tin khŸc nh±m tiÎn lìi cho thuyËn trõêng khi phï quyÆt ½Ùnh trong tÖnh huâng kh¸n c¶p.

2.3 Phò lòc bä sung cho KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u

Ngo¡i cŸc quy ½Ùnh nÅu ê 2.2.2 v¡ 2.2.4 -3, phï bä sung cŸc b¨n vÁ v¡ sâ liÎu ½õìc qui ½Ùnh t÷ (1) ½Æn (3) dõèi ½µy v¡o KÆ ho−ch cöu öng á nhiÍm d·u cða t¡u :

(1) B¨n vÁ bâ trÏ chung, m´t c°t giùa, sç ½ã ½õéng âng nhõ ½õéng âng d·u h¡ng ½õìc sø dòng ½Ì chuyÌn h¡ng khi cÜ sú câ trÅn t¡u.

(2) BiÌu ½ã dÝng chÿ ½Ì hõèng d¹n cho thuyËn trõêng tháng qua nhùng h¡nh ½æng v¡ quyÆt ½Ùnh trong quŸ trÖnh xÿ ra sú câ.

(3) CŸc h−ng mòc khŸc ‡¯ng kiÌm x¾t th¶y c·n thiÆt.

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Ph·n 6 KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra



Nhùng qui ½Ùnh trong Ph·n n¡y Ÿp dòng cho KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra.

1.1.2 YÅu c·u vË trang bÙ

T¡u b¶t kü cÜ täng dung tÏch t÷ 150 trê lÅn ½õìc chöng nhºn chê xá ch¶t lÞng ½æc h−i ph¨i cÜ KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra ½õìc ‡¯ng kiÌm duyÎt v¡ ½õìc ½´t ê mæt vÙ trÏ s³n s¡ng sø dòng. Quy ½Ùnh n¡y Ÿp dòng ½âi vèi cŸc t¡u nÅu trÅn kháng chºm hçn ng¡y 1 thŸng 1 n¯m 2003.

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Chõçng 2 YÅu c·u kþ thuºt 2.1 Qui ½Ùnh chung 2.1.1 Lõu û khi so−n thö kÆ ho−ch öng cöu

KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra phï ½õìc so−n thö cÜ x¾t ½Æn tháng tin cç b¨n vË t¡u gãm kiÌu v¡ kÏch thõèc cða t¡u, h¡ng hoŸ v¡ tuyÆn ho−t ½æng sao cho KÆ ho−ch kh¨ thi v¡ dÍ sø dòng.

2.1.2 Ngán ngù.

KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra phï ½õìc so−n thö b±ng ngán ngù l¡m viÎc cu¨ thuyËn trõêng v¡ sþ quan cða t¡u. NÆu ngán ngù sø dòng trong b¨n KÆ ho−ch kháng phï l¡ tiÆng Anh thÖ phï cÜ b¨n dÙch tiÆng Anh k¿m theo. ‡âi vèi t¡u kháng thúc hiÎn cŸc chuyÆn ½i quâc tÆ thÖ ‡¯ng kiÌm cÜ thÌ xem x¾t riÅng trong t÷ng trõéng hìp cò thÌ.

2.1.3 KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u

Trong trõéng hìp t¡u cñng phï Ÿp dòng cŸc quy ½Ùnh nÅu trong Ph·n 5 Qui ph−m n¡y, thÖ b¨n KÆ ho−ch n¡y cÜ thÌ ½õìc tä hìp chung vèi KÆ ho−ch öng cöu á nhiÍm d·u cða t¡u. Trong trõéng hìp n¡y tiÅu ½Ë cða b¨n KÆ ho−ch chung sÁ l¡ “ KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u”.

2.2 H−ng mòc trong KÆ ho−ch 2.2.1 Quy trÖnh bŸo cŸo khi xÿ ra sú câ á nhiÍm ch¶t lÞng ½æc h−i.

1 Trong KÆ ho−ch phï quy ½Ùnh r±ng thuyËn trõêng hoć sþ quan trúc ca phï tháng bŸo ngay lºp töc sú thï töc théi hoć dú kiÆn tèi Quâc gia ven biÌn g·n nh¶t.

2 CŸc mòc t÷ (1) ½Æn (7) dõèi ½µy phï ½õa v¡o h−ng mòc bŸo cŸo :

(1) TÅn t¡u, há hiÎu, cé, kÏch cë v¡ kiÌu t¡u.

(2) Ng¡y thŸng v¡ théi gian xÿ ra sú câ, vÙ trÏ, h¡nh trÖnh, tâc ½æ.

(3) Ng¡y thŸng v¡ théi gian bŸo cŸo tiÆp theo, lo−i v¡ sâ lõìng h¡ng/ k¾t chöa trÅn t¡u, chð h¡ng.

(4) Chi tiÆt tÜm t°t vË khuyÆt tºt/lõìng thiÆu hòt/tän th¶t.

(5) Chi tiÆt tÜm t°t vË á nhiÍm bao gãm lo−i ch¶t lÞng ½æc h−i, lõìng tän th¶t õèc tÏnh, nguyÅn nhµn tr¡n, kh¨ n¯ng tr¡n tiÆp theo, ½iËu kiÎn théi tiÆt v¡ biÌn.

(6) Chi tiÆt liÅn hÎ vèi chð t¡u/ nh¡ qu¨n lû/½−i lû bao gãm ½Ùa ch× bõu ½iÎn, sâ ½iÎn tho−i v¡ sâ Fax.

(7) CŸc hàat ½æng châng tr¡n v¡ hõèng dÙch chuyÌn cða t¡u. 2.2.2 Danh sŸch cŸc Tä chöc hoć CŸ nhµn c·n liÅn hÎ trong trõéng hìp xÿ ra sú câ á nhiÍm ch¶t lÞng

½æc h−i.

CŸc mâi liÅn hÎ vèi Quâc gia ven biÌn, c¨ng v¡ cŸc mâi liÅn hÎ khŸc m¡ t¡u quan tµm khi t¡u xÿ ra sú câ tr¡n ch¶t lÞng ½æc h−i, vÏ dò nhõ chð/ngõéi ½iËu h¡nh, ½−i lû, chð h¡ng, ngõéi bö hiÌm, phï ½õìc lÅn danh sŸch v¡ ½õa v¡o Phò lòc.

2.2.3 CŸc ho−t ½æng xø lû trúc tiÆp trÅn t¡u nh±m lo−i bÞ hoć kiÌm soŸt sú thï sau tai n−n.

1 Ït nh¶t cŸc h−ng mòc t÷ (1) ½Æn (3) sau ½µy phï ½õìc ½õa v¡o h−ng mòc cŸc ho−t ½æng châng tr¡n :

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TCVN 6276 : 2003, Ph·n 6, Chõçng 1

(1) B¨n miÅu t¨ chi tiÆt cŸc h¡nh ½æng nh±m khø bÞ hoć kiÌm soŸt sú thï ch¶t lÞng ½æc h−i v¡ ngõéi trúc ca.

(2) Qui trÖnh khø bÞ lÞng ½æc h−i ½¬ tr¡n v¡ biÎn phŸp chöa thÏch hìp cho ch¶t lÞng ½æc h−i ½¬ ½õìc khø bÞ v¡ vºt liÎu l¡m s−ch.

(3) Quy trÖnh chuyÌn ch¶t lÞng ½æc h−i t÷ t¡u sang t¡u khŸc.

2 Ït nh¶t cŸc mòc t÷ (1) ½Æn (3) dõèi ½µy phï ½õìc ½õa v¡o KÆ ho−ch châng tr¡n do hºu qu¨ cða tai n−n :

(1) œu tiÅn h¡ng ½·u l¡ ½¨m bö an to¡n cho ngõéi v¡ t¡u.

(2) B¨n tháng bŸo chi tiÆt vË möc ½æ tän th¶t cho t¡u v¡ vË sú câ tr¡n ch¶t lÞng ½æc h−i phï ½õìc tºp hìp v¡ õèc lõìng sao cho cÜ thÌ tiÆn h¡nh cŸc ho−t ½æng nh±m ng¯n chń sú câ tiÆp theo cða tai n−n.

(3) B¨n hõèng d¹n chi tiÆt vË än ½Ùnh v¡ söc bËn v¡ b¨n danh mòc nhùng tháng tin c·n thiÆt vË än ½Ùnh tai n−n v¡ ½Ÿnh giŸ söc bËn ½´t t−i v¯n phÝng Chð t¡u hoć v¯n phÝng tõçng tú khŸc.

2.2.4 Quy trÖnh v¡ ½iÌm liÅn l−c trÅn t¡u nh±m xŸc ½Ùnh to− ½æ ho−t ½æng cða t¡u theo chõçng trÖnh

phÝng châng á nhiÍm Quâc gia v¡ Khu vúc.

1 Phï quy ½Ùnh trong KÆ ho−ch r±ng thuyËn trõêng v¡ sþ quan trúc ca khŸc cða t¡u phï liÅn l−c vèi quâc gia ven bé cÜ chð quyËn trõèc khi tiÆn h¡nh cŸc ho−t ½æng nh±m h−n chÆ sú thï.

2 Trong KÆ ho−ch phï cÜ B¨n hõèng d¹n ½·y ½ð cho thuyËn trõêng cða t¡u trong cŸc ho−t ½æng kiÌm tra á nhiÍm ch¶t lÞng ½æc h−i ½õìc triÌn khai theo sú ½Ë xõèng cða chð t¡u.

3 Phï cÜ trong Phò lòc tháng tin vË cŸc hÎ thâng v¡ cŸch tä chöc liÅn ho¡n cða cŸc quâc gia ven bé dàc theo tuyÆn thõçng m−i cða t¡u.

2.2.5 Tháng tin khŸc

‡¯ng kiÌm cÜ thÌ yÅu c·u bä sung v¡o cŸc h−ng mòc qui ½Ùnh ê 2.2.1 ½Æn 2.2.4 nhùng tháng tin khŸc nh±m tiÎn lìi cho thuyËn trõêng khi phï quyÆt ½Ùnh trong tÖnh huâng kh¸n c¶p.

2.3 Phò lòc bä sung cho KÆ ho−ch

Bä sung v¡o danh mòc qui ½Ùnh ê 2.2.2 v¡ tháng tin nÅu ê 2.2.4-3, cŸc b¨n vÁ v¡ h−ng mòc ½õìc qui ½Ùnh t÷ (1) ½Æn (3) dõèi ½µy phï ½õìc ½õa v¡o KÆ ho−ch öng cöu á nhiÍm biÌn cða t¡u do cŸc ch¶t lÞng ½æc h−i gµy ra :

(1) B¨n vÁ bâ trÏ chung, m´t c°t giùa, sç ½ã ½õéng âng nhõ ½õéng âng d·u h¡ng ½õìc sø dòng ½Ì chuyÌn h¡ng khi cÜ sú câ trÅn t¡u.

(2) BiÌu ½ã dÝng chÿ ½Ì hõèng d¹n cho thuyËn trõêng tháng qua nhùng h¡nh ½æng v¡ quyÆt ½Ùnh trong quŸ trÖnh xÿ ra sú câ.

(3) CŸc h−ng mòc khŸc ‡¯ng kiÌm x¾t th¶y c·n thiÆt.

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TCVN 6276 : 2003, Phò lòc

Ph·n 7 thiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï cða t¡u


1.1 Qui ½Ùnh chung 1.1.1 Ph−m vi Ÿp dòng Nhùng qui ½Ùnh trong Ph·n n¡y Ÿp dòng cho thiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï cða t¡u gµy ra. 1.1.2 Thuºt ngù CŸc thuºt ngù trong Ph·n n¡y Qui ph−m ½õìc ½Ùnh nghØa nhõ sau:

(1) “ T¡u mèi” nghØa l¡ t¡u: (a) CÜ hìp ½ãng ½Üng mèi ½¬ ½õìc kû, hoć trong trõéng hìp kháng cÜ hìp ½ãng ½Üng mèi nhõng sâng

chÏnh cða t¡u ½¬ ½õìc ½´t ,hoć t¡u ½ang trong giai ½o−n ½Üng tõçng tú v¡o hoć sau ng¡y 27 thŸng 9 n¯m 2003.

(b) T¡u ½õìc b¡n giao v¡o hoć sau ng¡y 27 thŸng 9 n¯m 2003.

(2) “ T¡u hiÎn cÜ” nghØa l¡ t¡u kháng phï l¡ t¡u mèi.

(3) “Nõèc thï’ nghØa l¡: (a) Nõèc thoŸt v¡ cŸc lo−i nõèc x¨ khŸc t÷ nh¡ vÎ sinh, bãn tiÌu; (b) Nõèc thoŸt t÷ cŸc buãng y tÆ (phÝng khŸm, phÝng ½iËu trÙ,v.v) tháng qua cŸc bãn, chºu røa v¡ cŸc

âng thoŸt ½´t trong cŸc buãng ½Ü. (c) Nõèc thoŸt t÷ cŸc nçi chöa sîc vºt sâng; hoć (d) CŸc lo−i nõèc x¨ khŸc khi ho¡ træn l¹n vèi cŸc lo−i nõèc nÅu trÅn

(4) “K¾t chöa” nghØa l¡ k¾t dïng ½Ì thu gom v¡ chöa cŸc lo−i nõèc thï

(5) “CŸch bé g·n nh¶t” nghØa l¡ cŸch ½õéng cç sê m¡ t÷ ½Ü l¬nh hï cða quâc gia ½õìc thiÆt lºp phï hìp vèi luºt quâc tÆ, tr÷ trõéng hìp vïng bé biÌn ½áng b°c cða �xtrµylia ½õìc qui ½Ùnh trong Phò lòc IV cða MARPOL 73/78.

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TCVN 6276 : 2003, Ph·n 7, Chõçng 2

Chõçng 2

ThiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï cða t¡u gµy ra

2.1.1 Qui ½Ùnh chung 2.1.2 Ph−m vi Ÿp dòng

1 Nhùng yÅu c·u cða chõçng n¡y Ÿp dòng cho cŸc t¡u ch−y tuyÆn quâc tÆ:

(1) T¡u mèi cÜ täng dung tÏch t÷ 500 trê lÅn;

(2) T¡u mèi cÜ täng dung tÏch dõèi 500 v¡ ½õìc xŸc nhºn chê trÅn 15 ngõéi; v¡

(3) T¡u hiÎn cÜ cÜ täng dung tÏch t÷ 500 trê lÅn, v¡o ng¡y 27 thŸng 9 n¯m 2008; v¡

(4) T¡u hiÎn cÜ cÜ täng dung tÏch nhÞ hçn 500 v¡ ½õìc xŸc nhºn chê trÅn 15 ngõéi v¡o ng¡y 27 thŸng 9 n¯m 2008.

2 T¡u hiÎn cÜ, phï hìp vèi -1(3) v¡ (4) nÅu trÅn, cÜ sâng chÏnh ½¬ ½õìc hoć ½ang trong giai ½o−n ½Üng mèi tõçng tú trõèc ng¡y 2 thŸng 10 n¯m 1983 phï ½õìc trang bÙ thiÆt bÙ x¨ nõèc thï tho¨ m¬n cŸc yÅu c·u cða ½iËu 2.2.1, ½Æn möc cÜ thÌ ½õìc.

2.2 Qui ½Ùnh vË trang bÙ thiÆt bÙ 2.1.3 ThiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï

ThiÆt bÙ ng¯n ng÷a á nhiÍm do nõèc thï sau ½µy phï ½õìc l°p ½´t cho cŸc t¡u nÅu ê 2.1.1-1:

(1) Mæt trong cŸc hÎ thâng nõèc thï (a) Tr−m xø lû nõèc thï ½õìc ‡¯ng kiÌm duyÎt. (b) HÎ thâng nghiËn v¡ khø trïng nõèc thï ½õìc ‡¯ng kiÌm duyÎt, kÆt hìp dÍ d¡ng vèi phõçng tiÎn chöa

t−m théi khi t¡u cŸch bé g·n nh¶t dõèi 3 hï lû. (c) Mæt k¾t chöa cÜ dung tÏch tho¨ m¬n ½Ì thu gom t¶t c¨ nõèc thï cÜ tÏnh ½Æn ho−t ½æng cða t¡u, sâ

lõìng ngõéi cÜ ê trÅn t¡u v¡ cŸc yÆu tâ liÅn quan khŸc. K¾t chöa n¡y ½õìc kÆt c¶u tho¨ m¬n yÅu c·u cða ‡¯ng kiÌm v¡ ½õìc trang bÙ phõçng tiÎn xŸc ½Ùnh b±ng m°t lõìng nõèc thï chöa trong k¾t.

(2) Mæt ½õéng âng ½Ì thï nõèc thï v¡o phõçng tiÎn tiÆp nhºn.

(3) Mæt bÏch nâi tiÅu chu¸n trang bÙ v¡o ½õéng âng nÅu ê (2) phï hìp vèi b¨ng 7-1. ‡âi vèi cŸc t¡u ch−y chuyÅn tuyÆn câ ½Ùnh, ½õéng âng x¨ cða t¡u cÜ thÌ ½õìc trang bÙ bÏch nâi khŸc ½õìc ChÏnh quyËn ch¶p nhºn, nhõng phï ½¨m bö nâi gh¾p nhanh chÜng.

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B¨ng 7-1 KÏch thõèc tiÅu chu¸n cða bÏch nâi x¨

TÅn gài KÏch thõèc

‡õéng kÏnh ngo¡i 210mm

‡õéng kÏnh trong Tõçng öng vèi ½õéng kÏnh ngo¡i cða âng

‡õéng kÏnh ½õéng vÝng trÝn ½i qua tµm cŸc bu láng

170mm

R¬nh kho¾t ê bÏch nâi Lå cÜ ½õéng kÏnh 18mm ½õìc bâ trÏ cŸch ½Ëu nhau theo ½õéng trÝn ½i qua tµm cŸc lå b°t bu láng, vèi ½õéng kÏnh nÅu ê trÅn v¡ cŸc r¬nh n¡y ½õìc gia cáng tèi m¾p ngo¡i cða bÏch.

ChiËu ræng cða r¬nh 18mm

ChiËu d¡y bÏch nâi 16mm

Bu láng, ½ai âc : Sâ lõìng v¡ ½õéng kÏnh 4 chiÆc, måi chiÆc cÜ ½õéng kÏnh 16mm v¡ chiËu d¡i thÏch hìp

BÏch ½õìc thiÆt kÆ dïng cho ½õéng âng cÜ ½õéng kÏnh trong lÅn tèi 100mm v¡ ½õìc chÆ t−o b¡ng th¾p ho´c vºt liÎu tõçng ½õçng khŸc cÜ m´t ngo¡i ph²ng. BÏch n¡y cïng vèi do¯ng thÏch hìp ½Ì phï hìp vèi Ÿp su¶t l¡m viÎc 0,6MPa

Lõu û:

‡âi vèi t¡u cÜ chiËu cao m−n lû thuyÆt t÷ 5m trê xuâng, ½õéng kÏnh trong cða bÏch nâi cÜ thÌ b±ng 38mm.

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Phò lòc Hõèng d¹n thï cŸc ch¶t lÞng ½æc h−i

Chõçng 1 Qui ½Ùnh chung 1.1 Quy ½Ùnh chung 1.1.1 Ph−m vi Ÿp dòng

B¨n Phò lòc n¡y ½õa ra cŸc ½iËu mòc tham khö nh±m xem x¾t ch¶p nhºn T¡i liÎu hõèng d¹n qui trÖnh v¡ trang thiÆt bÙ dïng ½Ì thï ch¶t lÞng ½æc h−i, ½õìc trÖnh duyÎt phï hìp vèi cŸc ½iËu kho¨n ê mòc 2.1.2 -1(3) Ph·n 2 Qui ph−m b±ng viÎc nÅu ra cŸc hõèng d¹n thï ch¶t lÞng ½æc h−i hoć cŸc ch¶t tõçng tú khŸc ½õìc qui ½Ùnh t−m théi v¡o cŸc lo−i ch¶t tõçng öng v¡ nõèc d±n, nõèc røa h·m hoć cń hoć hån hìp khŸc chöa cŸc ch¶t ½¬ nÅu (sau ½µy gài t°t l¡ "ch¶t lÞng ½æc h−i" trong Phò lòc n¡y) b±ng biÎn phŸp kÆt c¶u v¡ trang thiÆt bÙ ½õìc qui ½Ùnh trong Ph·n 4 Qui ph−m cŸc hÎ thâng ng¯n ng÷a á nhiÍm biÌn cða t¡u.

1.1.2 Thï t÷ t¡u theo tuyÆn

C¶m thï xuâng biÌn cŸc ch¶t lÞng ½æc h−i khi t¡u ½ang h¡nh trÖnh tr÷ khi thÞa m¬n t¶t c¨ cŸc ½iËu kiÎn sau :

(1) T¡u ½ang ch−y vèi vºn tâc Ït nh¶t 7 hï lû/gié ½âi vèi t¡u tú ch−y hoć 4 hï lû/gié ½âi vèi t¡u kháng tú ch−y ;

(2) Thï phï ½õìc tiÆn h¡nh dõèi ½õéng nõèc, cÜ lõu û ½Æn vÙ trÏ cŸc lå l¶y nõèc biÌn. Tuy nhiÅn, nÆu ch¶t lÞng ½æc h−i chð yÆu thuæc nhÜm D thÖ yÅu c·u n¡y cÜ thÌ ½õìc miÍn tr÷ ;

(3) Thï phï ½õìc thúc hiÎn ê kho¨ng cŸch cŸch bé g·n nh¶t kháng dõèi 12 hï lû ;

(4) Thï phï thúc hiÎn ê nçi cÜ chiËu sµu múc nõèc kháng nhÞ hçn 25 m¾t. Tuy nhiÅn, nÆu ch¶t lÞng ½æc h−i chð yÆu l¡ ch¶t thuæc nhÜm D thÖ yÅu c·u n¡y cÜ thÌ ½õìc miÍn tr÷.

1.1.3 Ch¶t lÞng ½æc h−i ½õìc khø bÞ b±ng qui trÖnh tháng giÜ

Nhùng yÅu c·u cða Phò lòc n¡y cÜ thÌ kháng Ÿp dòng khi thï ½õìc tiÆn h¡nh b±ng cŸch l¶y nõèc v¡o k¾t sau khi sø dòng qui trÖnh l¡m s−ch b±ng tháng giÜ thÞa m¬n quy ½Ùnh 4.9 Ph·n 4 Qui ph−m.

1.2 Thï ch¶t lÞng ½æc h−i ngo¡i vïng ½ć biÎt 1.2.1 Ch¶t lÞng ½æc h−i lo−i A

C¶m thï xuâng biÌn ch¶t lÞng ½æc lo−i A. NÆu røa cŸc k¾t cÜ chöa ch¶t lÞng ½æc h−i lo−i A hoć hån hìp cða chîng, thÖ cń thu ½õìc phï ½õìc x¨ v¡o phõçng tiÎn tiÆp nhºn cho ½Æn khi nãng ½æ cða ch¶t lÞng ½æc h−i ½Ü trong nõèc thï v¡o phõçng tiÎn tiÆp nhºn b±ng hoć th¶p hçn nãng ½æ cń quy ½Ùnh cho ch¶t ½Ü ê cæt II B¨ng 4-1 tèi tºn khi h·m c−n. Quy ½Ùnh r±ng cń cÝn l−i trong h·m sau khi pha lo¬ng b±ng nõèc cÜ thÌ ½õìc thï xuâng biÌn vèi ½iËu kiÎn thÞa m¬n 1.1.2.

1.2.2 Ch¶t lÞng ½æc h−i lo−i B

C¶m thï xuâng biÌn ch¶t lÞng ½æc h−i thuæc lo−i B tr÷ khi thÞa m¬n t¶t c¨ cŸc ½iËu sau :

(1) T¡u thÞa m¬n 1.1.2 ; (2) Qui trÖnh v¡ thiÆt bÙ thï phï ½¨m bö nãng ½æ v¡ tý lÎ thï sao cho nãng ½æ ch¶t thï l¶y ê sÜng sau t¡u

kháng võìt quŸ 1 ph·n triÎu. (3) Lõìng h¡ng lèn nh¶t ½õìc thï t÷ måi h·m h¡ng v¡ hÎ thâng ½õéng âng phòc vò kháng võìt quŸ 1m3

hoć 1/3000 dung tÏch h·m h¡ng tÏnh theo m3.

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1.2.3 Ch¶t lÞng ½æc h−i lo−i C

C¶m thï xuâng biÌn ch¶t lÞng ½æc h−i lo−i C tr÷ khi thÞa m¬n t¶t c¨ nhùng ½iËu kiÎn sau :

(1) T¡u thÞa m¬n 1.1.2; (2) Qui trÖnh v¡ trang thiÆt bÙ ½Ì thï phï ½¨m bö r±ng nãng ½æ v¡ tý lÎ thï sao cho nãng ½æ ch¶t thï l¶y

ê sÜng sau t¡u kháng võìt quŸ 10 ph·n triÎu ; (3) Lõìng ch¶t lÞng ½æc h−i lèn nh¶t thï t÷ måi h·m h¡ng v¡ hÎ thâng ½õéng âng phòc vò kháng võìt quŸ

3 m3 hoć 1/1000 dung tÏch cða h·m tÏnh theo m3. 1.2.4 Ch¶t lÞng ½æc h−i lo−i D

C¶m thï xuâng biÌn ch¶t lÞng ½æc h−i lo−i D tr÷ khi thÞa m¬n t¶t c¨ nhùng ½iËu kiÎn sau :

(1) T¡u thÞa m¬n 1.1.2 ; (2) Nãng ½æ cða hån hìp kháng ½õìc võìt quŸ 1/10 thÌ tÏch nõèc.

1.2.5 Ch¶t lÞng ½æc h−i chõa phµn lo−i

C¶m thï xuâng biÌn cŸc ch¶t khŸc vèi ch¶t lÞng ½æc h−i ½¬ ½õìc phµn lo−i ê 2.1.1 (4) Ph·n 1 cða Quy ph−m n¡y.

1.3 Thï ch¶t lÞng ½æc h−i trong vïng ½ć biÎt. 1.3.1 Ch¶t lÞng ½æc h−i lo−i A.

C¶m thï xuâng biÌn cŸc ch¶t lÞng ½æc h−i lo−i A. NÆu k¾t chöa cŸc ch¶t lÞng ½æc h−i lo−i A hoć hån hìp cða chîng ½õìc røa tho¨ m¬n cŸc qui ½Ùnh 4.2 Ph·n 4 Quy ph−m n¡y, thÖ cń thu ½õìc phï ½õìc x¨ v¡o phõçng tiÎn tiÆp nhºn cho ½Æn khi nãng ½æ ch¶t ½æc trong nõèc thï v¡o phõçng tiÎn tiÆp nhºn b±ng hoć th¶p hçn nãng ½æ cń quy ½Ùnh cho ch¶t ½Ü ê B¨ng 4.1 (2) cða Phò lòc tèi tºn lîc k¾t c−n. Quy ½Ùnh r±ng cń cÝn lõu l−i trong k¾t sau khi ½õìc pha lo¬ng b±ng nõèc cÜ thÌ ½õìc thï xuâng biÌn vèi ½iËu kiÎn thÞa m¬n 1.1.2.

1.3.2 Ch¶t lÞng ½æc h−i lo−i B

C¶m thï xuâng biÌn cŸc ch¶t lÞng ½æc lo−i B tr÷ khi thÞa m¬n cŸc ½iËu kiÎn sau :

(1) T¡u thÞa m¬n 1.1.2 ; (2) K¾t ½õìc l¡m s−ch thÞa m¬n quy ½Ùnh 4.2 Ph·n 4 Quy ph−m n¡y, v¡ nõèc røa k¾t ½õìc x¨ v¡o phõçng

tiÎn tiÆp nhºn ; (3) Quy trÖnh v¡ trang thiÆt bÙ thï ½¨m bö r±ng nãng ½æ v¡ cõéng ½æ thï cða nõèc thï phï sao cho nãng

½æ ch¶t thï l¶y ê sÜng sau t¡u kháng võìt quŸ 1 ph·n triÎu. 1.3.3 Ch¶t lÞng ½æc h−i lo−i C

C¶m thï xuâng biÌn cŸc ch¶t lÞng ½æc lo−i C tr÷ khi tho¨ m¬n t¶t c¨ cŸc ½iËu kiÎn sau :

(1) T¡u tho¨ m¬n 1.1.2 ; (2) Quy trÖnh v¡ trang thiÆt bÙ thï ½¨m bö r±ng nãng ½æ v¡ cõéng ½æ thï phï sao cho nãng ½æ ch¶t thï

l¶y ê sÜng sau t¡u kháng võìt quŸ 1 ph·n triÎu ; (3) Lõìng h¡ng lèn nh¶t ½õìc thï ra t÷ måi h·m v¡ cŸc hÎ thâng ½õéng âng phòc vò kháng võìt quŸ 1m3

hoć 1/3000 dung tÏch cða h·m tÏch theo m3. 1.3.4 Ch¶t lÞng ½æc h−i lo−i D

Thï xuâng biÌn cŸc ch¶t lÞng ½æc lo−i D phï tho¨ m¬n quy ½Ùnh 1.2.4.

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1.3.5 Ch¶t lÞng ½æc h−i chõa ½õìc phµn lo−i

Thï xuâng biÌn cŸc ch¶t lÞng ½æc h−i chõa ½õìc phµn lo−i phï thÞa m¬n quy ½Ùnh 1.2.5. 1.4 Ch¶t lÞng kháng phï l¡ ch¶t lÞng ½æc h−i

Thï xuâng biÌn cŸc ch¶t ½õìc coi nhõ l¡ kháng cÜ h−i ½âi vèi söc khoÀ con ngõéi, t¡i nguyÅn sinh vºt biÌn v¡ tÏnh sø dòng hìp phŸp khŸc cða biÌn kháng l¡ ½âi tõìng kiÌm soŸt theo quy ½Ùnh n¡y. Nhùng ch¶t n¡y ½úçc nÅu trong B¨ng 4-9.

97


B¨ng 4-9 Danh mòc cŸc ch¶t lÞng kháng phï l¡ ch¶t lÞng ½æc h−i

1. Octyldecyl adipate 2. Acetonitrile 3. Acetone 4. Dung dÙch Aminoethyldiethanolamine/Aminoethylethanol amine 5. Dung dÙch 2- Amino -2-Hydroxymethyl -1, 3-propanediol (nãng ½æ 40% hoć nhÞ hçn) 6. Bïn Sodium almino silicate 7. Sulphur 8. Rõìu gâc Ethyl 9. Ethylene glycol butyl ether, Ethylene Glycol tert - butyl ether 10. Ethylene - vinyl acetate copolymer (nhñ tõçng) 11. Dung dÙch Calsiumnitrate/Magnesium nitrate/Potassium chloride. 12. Parafin clo hÜa (chöa 52% clo) 13. Dung dÙch Magnesium chloride 14. Dung dÙch Sodium chlorate (nãng ½æ 50% hoć nhÞ hçn) 15. Olefins (C13 v¡ lèn hçn, t¶t c¨ cŸc ½ãng phµn), alpha - Olefins (C13 - C18) 16. Bïn Kaolin 17. DÙch khoan:Dung dÙch Calcium bromide Dung dÙch Calcium chloride Dung dÙch Sodium chloride 18. Dung dÙch Glycine, muâi sodium 19. Glycerin 20. Glycerol polyalkoxylate 21. Dung dÙch Glucose, dung dÙch Dextrse 22. Isopropyl acetate 23. Methyl acetate 24. 3 - Methyl - 3- Methoxy butyl acetate 25. Alcoholic beverages, n.o.s. 26. Alcohols (C13 trê lÅn), Behenyl alcohol 27. Dung dÙch Vegetable portein (½õìc thðy hÜa) 28. Diethanolamine 29. Diethyl ether 30. Diethylene glycol 31. Diethylene glycol diethyl ether 32. Diethylene glycol ethyl ether 33. Diethylene glycol butyl ether 34. Dung dÙch a xÏt Diethylenetriamine pentaacetic, pentasodium 35. Dipropylene glycol 36. DÙch Magnesium hydroxide 37. Butyl stearate 38. Bïn than 39. Dung dÙch Sorbitol 40. Rõìu gâc Tert - Amyl 41. Ethylene carbonate 42. DÙch Calcium carbonate

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B¨ng 4-9 (tiÆp theo)

CŸc ch¶t lÞng kháng ph¨i l¡ ch¶t lÞng ½æc h−i

43. Tetraethylene glycol 44. Molasses 45. Glycerol triacetate 46. Triisopropanolamine 47. Triethylene glycol 48. Triethylene glycol butyl ether. 49. Tridecane 50. Tripropylene glycol 51. Lard 52. Dodecane (t¶t c¨ mài ½ãng phµn) 53. Dodecyl benzene 54. Dung dÙch Urea/formaldehyde resin 55. Dung dÙch Urea 56. Bïn Clay 57. n-Paraffins (C10 - C20) 58. Paraffin wax 59. Diheptyl phthalate, dioctyl phthalate 60. Dihexyl phthalate 61. Diheptyl phathalate 62. n- Butyl alcohol, sec - Butyl alcohol, tert - Butyl alcohol, Isobutyl alcohol 63. n- Propyl alcohol, Isopropyl alcohol 64. Propylene - butylene copolymer 65. Propylene glycol 66. Hexamethylene glycol 67. Hexylene glycol 68. Petrolatum 69. A xit Benzene tricarboxylic, trioctyl ester. 70. A xit b¾o (Na, C13 trê lÅn), Tridecanoic acid 71. Polyethylene glycols 72. Polyethylene glycol methyl ether 77. Nõèc 78 Hån hìpCetyl/Eicosil methacrylate 79. Dodecyl marhacrylate 80. Hån hìp Dodecyl/pentadecyl mathacrylate 81. Rõìc Metylic 82. Methyl ethyl ketone 83. 2 - Methyl - 2- hydroxy - 3 - butyne 84. 3 - Methyl - 3- methoxy butanol 85. 3 - Methoxyl - 1 - butanol 86. Latex (Carboxylated styrene - butadiene copolymers Stylene - butadien rubber) 87. Dung dÙch Lignin sulphonic, sodium salt 88. Nõèc tŸo 89. CŸc ch¶t ½õìc ChÏnh quyËn t−m théi ½Ÿnh giŸ l¡ ch¶t ½æc ê möc ½æ tõçng öng vèi ch¶t b¶t kü. 90. Hån hìp cða cŸc ch¶t n±m ngo¡i cŸc ch¶t lo−i A, B, C v¡ lo−i D ½¬ phµn lo−i theo MEPC/Circ.214.

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Vietnam standards tcvn 6276: 2003

Rules for Marine Pollution Prevention Systems of ships

Part 1 GENERAL

Chapter 1 GENERAL 1.1 General 1.1.1 Application

1 The Rules for Marine Pollution Prevention Systems of Ships (hereinafter referred to as "the Rules") apply to the survey, construction and equipment for the prevention of pollution by oil and noxious liquid substances in bulk from ships classed with Vietnam Register (hereinafter referred to as "VR").

The marine pollution prevention installations mean the construction and equipment specified in Part 3, 4, and 7 and include the emergency plans specified in Part 5 and 6.

2 Where there are special reasons for non-compliance with any requirements of the Rules, it may comply with other requirements modified by VR on the basis of the Rules.

3 The other equipment of ships for the prevention of pollution, which is not required to be installed by the Rules, are to comply with as deemed appropriate by VR.

4 The relevant requirements in TCVN 6259:2003 Rules for the Classification and Construction of Sea-going Steel Ships apply to the materials, equipment, installation and workmanship of the systems, unless otherwise specified in the Rules.

1.1.2 Equivalents

VR may allow any fittings, materials, appliances or apparatus to be fitted in a ship as an alternative to that required by the requirements of the Rules, where such fittings, materials, appliances or apparatus are at least as effective as that required by the Rules. However, the authority of VR is not to extend to substitution of operational methods to effect the control of discharge of oil as equivalent to those design and construction features which are prescribed by the Rules.

1.1.3 National requirements

VR may make special requirements as instructed by the flag-government of ships or the government of sovereign nation in which ships navigate.

9

tcvn 6276: 2003, Part 1, Chapter 2

10

Chapter 2 TERMINOLOGY AND ABBREVIATIONS 2.1 General 2.1.1 Terminology

For the purpose of the Rules, the following definitions are applied unless otherwise stated in each Part:

(1) "Oil" means petroleum including crude oil, heavy fuel oil, lubricating oil, light oil, kerosene, gas oil, and others prescribed by the relevant laws and regulations.

(2) "Oily mixture" means a mixture with any oil content (excluding lubricating oil additives). (3) "Liquid substance" means any substance whose vapour pressure (absolute pressure) at 37.8 oC does not

exceed 0.28 MPa. (4) "Noxious liquid substance" means any substance asigned as Category A, B, C or D in Table 4.1 Part 4 of

the Rules or provisionally assessed under the provisions of regulations 3(4) of Annex II of MARPOL 73/78 as falling into Category A, B, C or D.

(5) "Oil fuel" means any oil used as fuel in connection with the propulsion and auxiliary machinery of the ship in which such oil is carried.

(6) "Oil tanker" means a ship constructed to carry liquid cargoes in bulk in the greater part of their cargo spaces and a ship constructed to carry liquid cargoes in bulk in part of its cargo spaces with the volume of 200 m3 or more (excluding those with cargo spaces which are adapted to exclusively carry cargo other than oil in bulk).

(7) "Ship carrying noxious liquid substance in bulk" means a ship constructed to carry noxious liquid substances in bulk in the greater part of their cargo spaces, and a ship constructed to carry noxious liquid substances in bulk in part of its cargo spaces (excluding those with cargo spaces which are adapted to exclusively carry cargoes other than noxious liquid substances in bulk).

(8) "Combination carrier" means a ship designed to carry either oil or solid cargoes in bulk. (9) "Segregated ballast" means ballast water introduced into a tank permanently allocated to the carriage of

ballast or to the carriage of cargoes other than oil or noxious liquid substances as variously defined in the Rules, and which is completely separated from the cargo system.

(10)"Length"(Lf) means 96% of the total length on a waterline at 85% of the least moulded depth measured from the top of the keel, or the length from the foreside of the stem to the axis of the rudder stock on that waterline, if that be greater. In ships designed with a rake of keel the waterline on which this length is measured is to be parallel to the designed waterline. The length (Lf) is to be measured in metres.

(11) "Forward and after perpendiculars" are to be taken at the forward and after ends of the length (Lf). The forward perpendicular is to coincide with the foreside of the stem on the waterline on which the length is measured.

(12) "Amidships" is at the middle of the length (Lf). (13) "Breadth"(B) means the maximum breadth of the ship, measured amidships to the moulded line of the

frame in a ship with a metal shell and to the outer surface of the hull in a ship with a shell of any other material. The breadth (B) is to be measured in metres.

(14) "Deadweight"(DW) means the difference in metric tons between the displacement of a ship in water of a specific gravity of 1.025 at the load waterline corresponding to the assigned summer freeboard and the lightweight of the ship.

(15) "Lightweight" means the displacement of a ship in metric tons without cargo, oil fuel, lubricating oil, ballast water, fresh water and feed water in tanks, consumable stores, passengers and their effects.

(16) "Permeability" of a space means the ratio of the volume within that space which is assumed to be occupied by water to the total volume of that space.

(17) "Crude oil" means any liquid hydrocarbon mixture occurring naturally in the earth whether or not treated to render it suitable for transportation and includes: (a) crude oil from which certain distillate fractions may have been removed (b) crude oil to which certain distillate fractions may have been added.

(18) "Volumes" and "areas" in a ship are to be calculated in all cases to moulded lines.


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(19) "Crude oil tanker" means an oil tanker engaged in the trade of carrying crude oil. (20) "Product carrier" means an oil tanker engaged in the trade of carrying oil other than crude oil. (21) "Equipment for the prevention of discharge of noxious liquid substance" contains prewashing system,

stripping system, underwater discharge system, recording devices for residues discharge system to a reception facility, dilute water filling system, cargo heating system, ventilated washing system and segregated ballast tanks.

(22) "A ship which is engaged in the international voyage" means a ship which is engaged in voyage between a port and a port of another country.

(23) "Residue" means any noxious liquid substance which remains in cargo tanks and in the associated piping after unloading.

(24) “Anniversary Date” is the day corresponding to the expiry date of the International Oil Pollution Prevention Certificate, excluding expiry date of the Certificate.

(25) “A ship at beginning stage construction” is a ship whose keel is laid or a ship at a similar stage of construction. For the purpose, the term “ a similar stage of construction” means the stage at which:

(a) construction identifiable with a specific ship begins; and (b) assembly of that ship has commenced comprising at least 50 tons or 1% of the estimated mass of

all structural material, whichever is less. 2.1.2 Abbreviations

For the purpose of the Rules, the following abbreviations apply.

(1) MARPOL 73/78: The International Convention for the Prevention of Pollution from Ships, 1973, as modified by Protocol of 1978 relating thereto

(2) MEPC: Maritime Environment Protection Committee (3) IOPP certificate: An International Oil Pollution Prevention Certificate. (4) Related laws: The International Convention for the Prevention of Pollution from Ships, 1973 and laws on

the Strength of the Convention (5) IMO: International Maritime Organization. (6) SBT: Segregated Ballast Tank (7) CBT: Clean Ballast Tank (8) COW: Crude Oil Washing System (9) IGS: Inert gas System (10) PL: Protective location of segregated ballast space.


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Part 2 SURVEYS


The requirements in this chapter apply to surveys or tests for the marine pollution prevention installations of ships.

1.1.2 Kinds of surveys

1 Construction and equipment for the prevention of pollution from ships registered or intended to be registered are to subject to the following surveys:

(1) Initial Surveys (2) Periodical Surveys (3) Occasional Surveys

2 Initial Surveys consist of following surveys: (1) Initial Surveys during construction (2) Initial Surveys not built under the Survey.

3 Periodical Surveys consist of following surveys: (1) The construction, equipment, and plans specified in Part 3 to 6:

(a) Annual Surveys (b) Intermediate Surveys (c) Special Surveys

(2) The equipment specified in part 7: Special Survey

1.1.3 Intervals of surveys

1 Initial Surveys

(1) Initial Surveys during construction The construction and equipment for the prevention of pollution from ships intended to be constructed and registered with VR under the survey by the Surveyors in accordance with the designs approved by VR is to undergo the Initial Survey during construction. The presence of the Surveyor is required at the following stages of the work. The presence of the Surveyor may be increased or decreased taking account of facilies, workmanship and quality control system adopted at the manufacturers or shipyards. (a) When materials are applied to the parts and the parts are installed in the construction and equipment

for the prevention of pollution. (b) When machining of the main parts is finished and at a proper time during machining, if necessary. (c) When important equipment is installed on board. (d) When performance tests are carried out.

(2) Initial Surveys not built under the survey. The construction and equipment for the prevention of pollution from ships intended to be registered in a way other than that specified in (1) above is to undergo the Initial Surveys not Built under the Survey when an application for the survey is made.

2 Annual surveys Annual Surveys are to be carried out every 12 months within before and after three months following the date of completion of either Initial Surveys, Special Surveys or Annual Surveys.


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3 Intermediate surveys

Intermediate Surveys are to be carried out every 30 months within before and after six months following the date of completion of either Initial Surveys or Special Surveys.

4 Special Surveys

Special Surveys are to be carried out every five years following the date of the completion of either Initial Surveys or the previous Special Surveys. Intermediate Surveys and Annual Surveys

5 Occasional Surveys Occasional Surveys are to be carried out at the following occasions at times other than the Initial Surveys, Annual Surveys, Intermediate Surveys or Special Surveys. Periodical Surveys can substitute for the Occasional urveys where a cause of carying out the Occasional Surveys is cleared at the Surveys.

(1) When damage occurred to important parts of the construction or equipment which underwent the Initial Survey, or when repairs or modifications for such damaged parts are carried out.

(2) When changes are made to the Shipboard Oil Pollution Emergency Plan and/or a Shipboard Marine Pollution Emergency Plan for Noxious Liquid Substances placed on board a ship which underwent the Initial Survey.

(3) When the Survey for veification of compliance with requirements of the Rules which is to be applied to ships already constructed.

(4) Other occasions when an occasional survey is considered to be necessary.

1.1.4 Periodical Surveys caried out in advance

The requirements for Periodical Surveys caried out in advance are to be in accordance with the provisions specified 1.1.4 TCVN 6259-1B:2003 .

1.1.5 Postponememt of Special Surveys

The requirements for postponememt of Special surveys are to be in accordance with the provisions specified in 1.1.5(1) or 1.1.5(2) TCVN 6259-1B:2003.

1.1.6 Modification of the requirements

1 At the Periodical Surveys, the surveyor may modify the requirements having regard to the size, service engaged, construction, age, service performance, results, of previous surveys and actual condition of the ship.

2 At intermediate Surveys, where examminations have been caried out during the period between the 2nd and 3rd annual Surveys according to the requirements for intermediate Surveys, said examinations to be carried out as Intermediate Surveys may be omitted at the discretion of the Surveyor.

3 At intermediate Surveys, as to the items which are considered necessary by the Surveyor or requested by the ship owner, examinations may be carried out according to the requirements for Special Surveys.

4 At Special Surveys, where examinations have been carried out during nthe period between the 4th Annual Survey and Special Survey specified in 1.1.3-4 according to the requirements for Special Surveys, said examinations to be carried out as Special Surveys may be omitted at the discretion of the Surveyor.However, in case where annual Surveys or intermediate Surveys are out in advance in accordance with 1.1.4-2, the Special Survey is to be carried out in accordance with th provisions specified otherwise by VR.

1.1.7 Ships laid-up

1 Ships laid-up are not subject to Periodical Surveys specified in 1.1.2

2 When ships laid-up are about to be put in to service, following surveys and surveys specific matters which have been postponed due to being laid-up, if any, are to be carried out.


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(1) When any Periodical urvey or Planned Machinery Surveys designated before laid-up has not been due, the coming nearest periodical survey or Planned Machinery Surveys which was designated before laid-up is to be carried out.

(2) When Periodical Surveys or Planned Machinery Surveys designated before laid-up has already become due, these Periodical Surveys or Planned Machinery Surveys are, in principle, to be carried out. However in case where two or more kinds of the Periodical Surveys or Planned Machinery Surveys have already become due, the supeerlative one is to be carried out.

3 If the survey to be carried out under the requirements of -2 above is a Special Survey, the Special Survey is to be the one corresponding to the age of the ship.

1.2 Preparation for surveys and other 1.2.1 Notification

When a ship is to be surveyed in accordance with the Rules, it is the responsibility of the owners to notify the Surveyor at the place where they wish to undergo the survey. The Surveyor is to be advised of of the survey a reasonable time in advance so that the survey can be carried out at the proper time.

1.2.2 Preparation for surveys

1 All such preparations as required for initial, periodical and other surveys specified in this part as well as those which may be required by the Surveyor in accordance with the provisions in this Part are to be made by the Owners or their representatives at their responsibilities. The preparations are to include provisions of an easy and safe access, necessary facilities and necessary records for the execution of the survey. Inspection, measuring and test equipment, which Surveyor rely on to make decisions affecting classification are to be individually indetified and calibrated to a standard deemed appropriate by VR. However, the Surveyor may accept simple measuring equipment( e.g. rulers, measuring tapes, weld gauges, micrometers) without individual indentification or confirmation of calibration, provided they are of standard commecial design, properly maintained and periodically compared with other similar equipment or test pieces. The Surveyor may also accept equipment fitted on board a ship and used in examination of shipboard equipment based either on calibration records or comparision of readings with multiple instruments.

2 An applicant for survey is to arrange a supervisor who is well conversant with the survey items intended for the preparation of surveys to provide the necessary assistance to the Surveyor according to his requests during the surveys.

1.2.3 Suspension of surveys

Surveys may be suspended if necessary preparations have not been made, any appropriate attendant is not present, or the Surveyor considers that the safety for the execution of the survey is not ensured.

1.2.4 Recommendations

If repairs are deemed necessary as a result of the survey, the Surveyor will notify his recommendations to the owner or the representative. Upon the notification, the repairs are to be made to the satisfaction of the Surveyor.

1.3 Verification survey of certificates, etc. 1.3.1 International oil pollution prevention certificates or equivalent certificate

When annual or intermediate Surveys are carried out, either the International Oil Pollution Prevention Certificate or equivalent Certificate is to be submitted to the Surveyor to obtain his confirmation for the validity of the certificate, etc. with necessary endorsement in it made by him.


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1.3.2 Certificates and documents other than specified 1.3.1

1 At surveys, the following certificates and other documents are to be presented to the Surveyor to verify that these certificates and documents are placed on board the ship (excluding unmanned towed ships), and are appropriate. However, at Occasional Surveys, the presentation of certificates and documents to the Surveyor may be limited to the concerned ones.

(1) Certificates of oily-water separating equipment, oil filtering system, processing equipment, oil content meter and oil/water interface detector, etc. as deemed appropriate by VR

(2) Procedures and Arrangements Manual for the approved crude oil washing system (3) Operation manual for the approved oil discharge monitoring and control system (4) Approved loading manual and damaged stability data (5) Operation manual of clean ballast tank (6) Part flow system operation manual (7) Special ballasting operation manual (8) Records of oil discharge monitoring and control system (except at the Registration Surveys) (9) Approved Procedures and Arrangements Manual for the discharge of noxious liquid substances (10) Cargo record book (11) Shipboard Oil Pollution Emergency Plans (12) Shipboard Marine Pollution emergency Plan for Noxious Liquid Substances

2 At Annual Survey or Interdimediate Survey, the International Sewage Pollution Prevention Certificate is to be presented to the Surveyor to verify the valid of the certificate.

1.3.3 Verification inspection of related installations

At surveys, the following items of equipment are to be checked to ensure that they have been inspected in accordance with the requirements of the Rules for the Classification and Construction of Sea-going Steel Ships.

(1) Inert gas system (2) Incinerating equipment


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Chapter 2 initial SURVEYS 2.1 Initial Surveys during construction 2.1.1 General

At Initial Surveys during construction, the construction and installations for the prevention of pollution from ships and their workmanship are to be examined in detail in order to ascertain that they meet the relevant requirements in each Part of the Rules.

2.1.2 Submission of plans and documents for approval

1 For any ship intending to undergo Initial Surveys, the following plans and documents are to be submitted to VR for approval:

(1) Installations for the prevention of pollution by oils from machinery spaces of all ships (a) Bilge piping diagram (b) Ballast piping diagram (c) Plans and documents relevant to the oil discharge monitoring and control system (d) Plans and documents relevant to the oily-water separating equipment (oil filtering equipment) (e) Plans showing sludge tanks (if included in the bilge piping diagram, no submission of these plans are

required) (f) Other plans and documents as deemed necessary by VR

(2) Installations for the prevention of pollution by oil carried in bulk by oil tankers (a) Draft and trim calculation sheets for the ship in ballast relevant to marine pollution (b) Calculation sheets to limit tank capacities (c) Protection location of segregated ballast space calculation sheets (d) Damaged stability:

(i) Damaged stability calculation sheets (ii) Loading manual and damaged stability information (iii) Stowage plan, draft or trim calculation sheets (iv) Arrangement plans for pipes, valves and sea suctions.

(e) Piping diagrams for each system (f) Retention of oil on board:

(i)Plans and documents relating to oil discharge monitoring and control system (ii)Plans and documents relating to oil/water interface detectors (iii)Operation manual of oil discharge monitoring and control system

(g) Crude oil washing system: (i) Plans and documents relating to tank washing machines (Specifications) (ii) Shadow diagram (iii) Arrangements of hull structural members in tanks (iv) Arrangements of drain holes (when entries are made on the midship sectional plan, they may be

accepted) (v) Arrangements of level gauges and manual sounding openings (vi) Crude oil washing system operations and equipment manual

(h) Clean ballast tank: (i) Arrangement of Clean ballast tank (ii) Clean ballast tank operation manual

(i) Special ballast: Special ballast operation manual

(j) Part flow system: Part flow system operation manual

(k) Other plans and documents as deemed necessary by VR


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(3) Installations for the prevention of pollution by noxious liquid substances from ships carrying noxious liquid substances in bulk (a) Plans and documents relevant to the pumping system (b) Plans and documents relevant to the prewashing system (c) Plans and documents relevant to the stripping system (including the evaluation of clingage residue on

tank surfaces) (d) Plans and documents relevant to the underwater discharge arrangements (e) Plans and documents relevant to the discharge recording devices of residues (f) Plans and documents relevant to the discharge arrangements to reception facilities (g) Plans and documents relevant to the dilute water filling system (h) Plans and documents relevant to the cargo heating system (i) Plans and documents relevant to the ventilated washing system (j) Procedures and Arrangements Manual for the discharge of noxious liquid substances (k) List of cargoes intended to be carried on board (l) Other plans and documents as deemed necessary by VR

(4) Equipment for the prevention of pollution by sewage from ships (a) Plans, documents and particulars relevant to the equipment for the prevention of pollution by sewage

from ships (including total capacity of holding tank, total capacity, manufacturer/type and the copy of type approval certificates by the Administration of sewage treatment plant and sewage comminuting and disinfecting system).

(b) Sewage piping diagrams (including the standard shore connection, arrangement of pipes, valves and their material)

(c) Other plans and documents as deemed necessary by VR.

(5) Others (a) Shipboard Oil Pollution Emergency Plans (b) Shipboard Marine Pollution emergency Plan for Noxious Liquid Substances

2 The following plans and documents are to be submitted to VR for reference, in addition to the approval plans and documents specified in the preceding -1.

(1) Installations for the prevention of pollution by oils from machinery spaces of all ships (a) Particulars of machinery (specifying the capacity of sludge tanks) (b) Other plans and documents as deemed necessary by VR

(2) Installations for the prevention of pollution by oil carried in bulk by oil tankers (a) Particulars of hull (specifying the rate of propeller immersion) (b) General arrangement plan (c) Tank capacity plans or tables (d) Plan showing the distribution of light load weight (e) Other plans and documents as deemed necessary by VR

(3) Equipment for the prevention of pollution by noxious liquid substances from ships carrying noxious liquid substances in bulk (a) Particulars of hull (b) General arrangement plan (c) Midship section plan (d) Bulkhead construction plan (e) Other plans and documents as deemed necessary by VR

(4) Where materials which contain sabestos are used, documents including the localtion and other detailed information.

3 Notwithstanding the requirements of the preceding -1 and -2, where a ship is constructed or the marine pollution prevention installations manufactured or installed by using the plans and documents already approved, the submission of part of or whole of the plans and documents specified in the preceding -1 and -2 may be omitted under the requirements separately specified by VR.


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2.1.3 Inspections of construction and equipment

1 Inspections are to be carried out on the following items for the installations for the prevention of pollution by oil from the machinery spaces of all ships:

(1) Equipment to control discharge of oily bilge from machinery spaces (a) Satisfactory installations and operations of the oily-water separating/filtering system, processing

system, and oil content meters are to be ensured. However, the confirmation of operations may be done through simulation tests or equivalent other alternative procedures.

(b) Satisfactory installations and operations of the oil discharge monitoring and control system including the automatic and manual operations of the equipment provided for stopping the effluent discharge are to be ensured. However, the confirmation of operations may be done through simulation tests or equivalent other alternative procedures.

(c) Satisfactory operations of the indicating and recording devices fitted to the oil discharge monitoring and control system or of the recording device attached to the oil content meter are to be ensured.

(d) Sufficient provisions of consumables such as recording paper rolls for the recording devices are to be ensured.

(e) The satisfactory function of the alarm for the oil filtering system is to be ensured. (f) The automatic stopping device of the oil filtering system is to be tested.

(2) Fuel oil tanks Segregation of oil fuel systems and water ballast systems are to be ensured.

(3) Tanks for oil residues (sludge) (a) Tanks for oil residues (sludge) or bilge water holding tanks, and their discharge arrangements are to be

checked to see if they are appropriate. (b) Homogenizers or other approved sludge control equipment are to be checked to see if they function

properly. However, the application of this requirement is to be limited to cases where the size of such tanks has been approved in accordance with the requirements of 2.2.1-1(2) in Part 3 of the Rules.

(4) Standard discharge connections Satisfactory provisions of the standard discharge connection are to be confirmed.

2 Inspections are to be carried out on the following items for the equipment for the prevention of pollution by oil carried in bulk by oil tankers.

(1) Segregated ballast tanks (a) Satisfactory installations of the pumps, pipes and valves of the segregated ballast tank system are to be

ensured. (b) It is to be ensured that there are no connection between the cargo oil system and segregated ballast

system. (c) Where portable spool pieces enabling the segregated ballast tanks to be deballasted in an emergency

by connecting such tanks to the cargo oil pump are provided, it is to be confirmed that a check valve is fitted to the segregated ballast pipeline, and that the spool piece is installed at a conspicuous place in the pump room fitted with a permanent sign restricting the use of the spool piece.

(d) It is to be confirmed that the ballast pipeline passing the cargo oil tanks and cargo pipeline passing the ballast tanks have no leakage.

(2) Crude oil washing system (a) It is to be confirmed that the crude oil washing system has been installed in accordance with the

requirements of 3.4 in Part 3, particularly, the following items (i) through (vii): (i) Inspection to confirm that the pipes, pumps, valves and deckmounted washing machines give no

signs of leakage, and that all of the pipe supports, fasteners, clamps, etc. of the crude washing lines are rigid and intact.

(ii) The crude oil washing system components are to be tested at a pressure corresponding to 1.5 times the working pressure.

(iii) Where driving units are not incorporated in the tank washing machines, it is to be ensured that serviceable driving units in the number as specified in the manual are placed on board the ship.


19

(iv) Where steam heaters for water washing are provided, it is to be ensured that they can be properly shut-off during crude washing either by double stop valves or by a clearly identifiable blind flange.

(v) It is to be ensured that the specified means of communication between the on-deck lookout and cargo control room is in good working order.

(vi) It is to be ensured that the supply pumps of the crude oil washing system are provided with a safety device for over pressure or other approved equipment.

(vii) It is to be ensured that the flexible hoses supplying oil to the washing machines of a combination carrier are of the approved type, and that they are stored properly and are ready for service.

(viii) Operation tests for COW Operation tests for the crude oil washing machines and pumps are to be carried out by using seawater.

(ix) Performance tests for stripping systems Performance tests for the stripping systems are to be carried out during the operation tests specified in viii) above.

(c) The crude oil washing perations are to be carried out using the aooroved crude oil washing equipment and as specifified in the approved Operations anf Equipment Manual, and the effetiveness of the COW is to be verified to fully comply with the requirements of 3.4 in Part 3 with satisfaction, and, in particular, the items specified in Table 2-1 are to be confirmed according to the type of ships and the tanks subject to tests and examinations. However, this verification may be carried out within one year after the oil tanker was first engaged in the trade of carrying crude oil or by the end of the third voyage carrying crude oil suitable for crude oil washing, whichever occurs later. Where VR is satisfied that oil tankers are similar in all relevant respects, this requirement needs only be applied to one such oil tanker.

Table 2-1 Verification of Effectiveness of COW

Type of ships Tank Tests and examinations 1 For oil tankers

that comply with 3.2.4(1)(a) in Part 3

(1) Cargo oil tanks (i) Confirmation of the effectiveness of the stripping system The operation of the stripping system is to be confirmed by observing the monitoring devices and monitoring the oil level (by dipping or other means) specified in 3.4.5(6) in Part 3 during bottom washing.

(ii) Confirmationof the proper operation of the crude oil washing machines and pumps; The proper operation of washing machines is to be monitored with particular reference to supply pressure, cycle times, machine function (the operating indicators and sound patterns) or other approved methods.

(iii) Confirmation of the condition of the bottom of cargo tanks after washing; On completion of washing and final draining, the tanks are to be hand dipped, as close as practical to the foward end, center and aft end in each tank confirm that bottom of each cargo tank is dry*. The record of these dips is to be made in Operations nad Equipment Manual.

(iv) The tests nad examinations specified in i) through iii) above may need only be applied to one tank of a group of tanks of similar configuration.

(v) Internal examinations of the tanks are to be caried out if deemed necessary by the Surveyor.

(1) Cargo oil tanks (i) Same requirements as specified in 1(1) above 2 For oil tankers other then those specified in 1 above

(2) Cargo oil/Gale ballast tanks

(i) Same requirements as specified in 1(1) above (ii) Confirmation of oil floating on top of ballast water;

A measurement is to be made of the muont of oil floating on top of the gale ballast to confirm that the ratio of the volume of oil on top of the total gale ballast water to the volume of tanks that contain this water is not to exceed 0.00085

Note: * The term of “dry”: 3.4.5(4) in Part 3 is to be refered to


20

(3) Retention of oil on board (a) It is to be ensured that the installations of the slop tanks or cargo oil tanks assigned as slop tanks, and

related piping systems are in good working order. (b) Inspections of the oil discharge monitoring and control system and associated piping arrangements.

Particularly, inspections on the following items: (i) It is to be ensured that the oil discharge monitoring and control system including the automatic and

manual devices provided to stop effluent discharges, the starting interlocking system, the response time of the oil content meter (to be 20 seconds or less) and the accuracy of flow meter (±15% or less of the actual flow rate) are in good working order. However, confirmation of operations may be done by simulation tests or equivalent other means.

(ii) It is to be ensured that the indicating and recording devices fitted to the oil discharge monitoring and control system are in good working order.

(iii) Function tests of audible and visible alarm devices fitted to the oil discharge monitoring and control system.

(iv) It is to be ensured that consumables for recording devices are sufficiently provided on board the ship.

(c) It is to be ensured that the approved oil/water interface detectors are placed on board the ship and are in good working order.

(4) Pumps, piping and discharge arrangements (a) It is to be ensured that the discharge piping arrangements for the discharge of dirty ballast water or oil

contaminated water are satisfactory. (b) It is to be ensured that the observation position and the discharge control position for visually

observation of the discharge of oil contaminated water including tests to confirm their satisfactory interconnecting functions are in good order.

(c) It is to be ensured that the stripping system, slop tanks, cargo tanks or systems to drain all cargo pumps and all oil lines including interconnecting system for connection to reception facilities for the discharge of dirty ballast water or contaminated water are satisfactory.

(5) Arrangements It is to be ensured that the cargo transfer system and closing devices provided in the cargo oil pipelines for separating the tanks from each other are appropriate.

(6) Subdivision and stability In addition to the arrangements specified in the preceding (5), it is to be ensured that the arrangements to prevent the progressive flooding from extending to compartments are appropriate.

(7) Inspection of clean ballast tank arrangements (a) It is to be ensured that the pump, piping and valve arrangements are in accordance with the approved

drawings, and they are actually provided and are in good working order. (b) Visual inspections of clean ballast tank to confirm that there is no oil contamination. (c) Items specified in the preceding (1)(d).

(8) Special ballasting arrangements It is to be ensured that the special ballasting arrangements are provided in accordance with the approved drawings and are in good working order.

(9) Part flow system It is to be ensured that the part flow system is in good working order.

3 Inspections on the following items are to be carried out for the equipment for the prevention of discharge by noxious liquid substances from ships carrying noxious liquid substances in bulk:

(1) Prewashing system (a) It is to be ensured that the system is provided in accordance with the approved drawings and the

procedures and arrangements manual, and is in good working order. (b) Where wash water heating system is provided, it is to be ensured that the system is installed in

accordance with the approved drawings, and is in good working order. (c) Where portable washing machines are used, it is to be ensured that the number and location of opening

for tank washing are provided in accordance with the approved drawings.


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(2) Stripping system (a) It is to be ensured that the stripping system is provided in accordance with the approved drawings, and

is in good working order. (b) It is to be ensured that the amount of residues produced by stripping, which is determined by the water

test through the approved procedure and the approved calculation method is within the values given in Table 4.8 specified in 4.3.2 in Part 4.

(c) Where removable pipes and bent pipes are provided, it is to be ensured that they are stowed on board the ship.

(3) Discharge outlets below the waterline (a) It is to be ensured that underwater discharge outlets are provided in accordance with the approved

drawings. (b) It is to be ensured that means are provided to separate the underwater discharge outlets from those

above the water line. (4) Discharge recording devices of residues

(a) Where valuable delivery pumps are provided, it is to be ensured that they can be controlled in accordance with the approved manual.

(b) Where constant delivery pumps are provided, it is to be ensured that the delivery rate is within the specified value.

(c) It is to be ensured by an actual flow test that the accuracy of the flow meter is ±15% or higher. (d) It is to be ensured that the recording devices are in good working order.

(5) Arrangements for discharge to reception facilities It is to be ensured that the arrangements for discharge to reception facilities are provided in accordance with the approved drawings, and are in good working order.

(6) Dilute water filling system It is to be ensured that the dilute water filling system is provided in accordance with the approved drawings, and is in good working order.

(7) Cargo heating system It is to be ensured that the cargo heating system is provided in accordance with the approved drawings, and is in good working order.

(8) Ventilated washing system (a) It is to be ensured that the ventilated washing system is provided in accordance with the approved

drawings, and is in good working order. (b)Where portable washing machines are used, it is to be ensured that the necessary blower fan capacity is

obtainable. 4 Inspections are to be carried out on the following items for the equipment for the prevention of pollution by

sewage from ships: (1) It is to be ensured that the equipment is provided in accordance with the approved drawings. (2) It is to be ensured that the discharge pipeline and the standard discharge connection specified in 2.2.1, Part

7 of the Rules are provided in accordance with the approved drawings. (3) It is to bo ensured that the equipment in (1) and the pumps relevant to (2) are in good working order.

2.2 Initial Surveys not built under the survey 2.2.1 General

At Initial Surveys not Built under the survey, inspections are to be carried out on the construction and equipment for the prevention of pollution, and it is to be ensured that comply with the requirements specified in the Rules.

2.2.2 Submission of plans and documents for approval

For any ships intending to undergo Initial Surveys not Built under the survey, the plans and documents specified in 2.1.2 in Part 2 are to be submitted according to the necessities.


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2.2.3 Inspection of construction and equipment

At Initial Surveys not Built under the survey, the relevant inspections mutatis mutandis the requirements specified in 2.1.3 in Part 2 are to be carried out. However, for ships in possession of the International Pollution Prevention Certificate or equivalent certificate, inspections corresponding to that specified in 3.3 in Part 2 are to be carried out.


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Chapter 3 periodical SURVEY 3.1 Annual Surveys 3.1.1 General

At Annual Surveys, inspections are to be carried out on the relevant items of the requirements specified in 3.1.2 of this Part, and in addition, general conditions of the relevant construction and equipment are to be inspected.


1 The following inspections are to be carried out on the equipment for the prevention of pollution by oil from machinery spaces of all ships:

(1) Arrangements to control discharge of oily bilge from machinery spaces (a) Visual inspections of the oily-water separating equipment, oil filtering system, processing system and

oil content meters (b) Visual inspection of the oil discharge monitoring and control system (c) It is to be ensured of satisfactory operations of the automatic or manual means to stop discharge of

effluent fitted to the oil discharge monitoring and control system. (d) It is to be ensured of satisfactory operations of the indicating and recording devices of the oil

discharge monitoring and control system, and sufficient provisions of consumables for the recording devices on board the ship.

(e) Alarm test of the oil filtering system (f) Test of the automatic stopping device of the oil filtering system

(2) Fuel oil tanks It is to be ensured of segregation of the oil fuel system and water ballast system.

(3) Tanks for oil residues (sludge) (a) It is to be ensured that the tanks for oil residues, slop tanks and their discharge arrangements are

satisfactory. (b) It is to be ensured that the homogenizers or other approved equipment for the control of oil residues

(sludge) are in good working order. However, this requirement is to apply only where the size of the tanks for oil residues (sludge) is approved in accordance with the requirements of 2.2.1-1(2) in Part 3 of the Rules.

(4) Standard discharge connection It is to be ensured of the provision of the standard discharge connection.

2 Inspections are to be carried out on the following items for the construction and equipment for the prevention of pollution by oil carried in bulk by oil tankers.

(1) Segregated ballast tanks (a) It is to be ensured that there are no connections between the cargo oil pipelines and ballast pipelines. (b) Where portable spool pieces enabling the segregated ballast tanks to be deballasted in an emergency

by connecting such tanks to the cargo oil pump are provided, it is to be ensured that a check valve is fitted to the segregated ballast pipeline and that a permanent sign restricting the use of the spool piece is fitted to a conspicuous place in the pump room.

(c) It is to be ensured that there is no sign of oil contamination in the segregated ballast tanks. (2) Crude oil washing system

(a) It is to be ensured that the requirements of the crude oil washing system are satisfactory, and in particular, inspections are to be carried out on the following items (i) through (vi): (i) Visual inspection to ensure that there is no indication of leakage on crude washing pipelines,

pumps, valves and deck-mounted washing machines, and that all of the fasteners of crude washing pipelines are intact.


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(ii) Where driving units are not incorporated in the tank washing machines, it is to be ensured that serviceable driving units in number as specified in the manual are provided on board the ship.

(iii) Where steam heaters for water washing are provided, it is to be ensured that they can be properly shut-off during crude oil washing either by the double stop valve or by the clearly identifiable blind flange.

(iv) It is to be ensured that the specified means of communication between the on-deck lookout and cargo control room is in good working order.

(v) It is to be ensured that the supply pumps of the crude oil washing system are provided with a safety device for overpressure or other approved devices.

(vi) It is to be ensured that the flexible hoses supplying oil to the washing machines of combination carriers are of the approved type, and that they are stored properly and are ready for service.

(3) Retention of oil on board (a) Inspection of the oil discharge monitoring and control system and associated piping arrangements,

particularly, inspections on the following items: (i) Visual inspection of the oil discharge monitoring and control system and associated equipment. (ii) It is to be ensured that the automatic and manual devices provided to stop effluent discharges are

in good working order. (iii) It is to be ensured that the indicating and recording devices are in good working order, and that

consumables for recording devices are sufficiently provided on board the ship. (iv) Function tests of audible or visible alarm devices fitted to the oil discharge monitoring and control

system. (b) It is to be ensured that the approved oil/water interface detectors are stowed on board the ship.

(4) Pumps, piping and discharge arrangements (a) It is to be ensured that the discharge piping arrangements for discharge of dirty ballast water or oil

contaminated water are satisfactory. (b) Tests on the means of communication between the observation position and the discharge control

position. (c) Inspection of the stripping system, slop tanks, cargo tanks or systems to drain all cargo pumps and all

oil lines including inter connecting pipelines to reception facilities for discharge of dirty ballast water or contaminated water.

(5) Clean ballast tank arrangements (a) It is to be ensured that the clean ballast tank arrangements are in good working order. (b) Visual inspection of clean ballast tank to ensure that there is no sign of contamination by oil.

(6) Special ballast system It is to be ensured that the special ballast system is in good working order.

(7) Part flow system It is to be ensured that the part flow system is in good working order.

3 Inspections are to be carried out on the following items for the equipment of the ships for the prevention of pollution by noxious liquid substances in bulk:

(1) Prewashing system (a) Visual inspection to confirm that the type, capacity, number and locations of washing machines are as

approved. (b) Visual inspection of the tank washing pipelines and wash water heaters.

(2) Stripping system Visual inspection to confirm that no modifications have been made on any part of the stripping system.

(3) Discharge outlets below the waterline Visual inspection of the location of the underwater discharge outlets as far as practicable.

(4) Discharge recording devices of residues (a) Visual inspection to confirm that the discharge rate control devices are as approved. (b) It is to be ensured that the discharge recording devices are in good working condition.

(5) Arrangements for discharge to reception facilities Visual inspection.


25

(6) Dilute water filling system Visual inspection.

(7) Cargo heating system Visual inspection as far as practicable.

(8) Ventilated washing system It is to be confirmed that the ventilating equipment is of the approved type.

4 It is to be verified that a Shipboard Oil Pollution Emergency Plan and/or a Shipboard Marine Pollution Emergency Plan for Noxious Liqid Substances are/is placed on board the ship and that it is appropriate.

3.2 Intermediate Surveys 3.2.1 General

At Intermediate Surveys, inspections are to be carried out on the relevant items of 3.2.2 of the Rules, and in addition, general condition of the relevant construction and equipment are to be inspected.


1 In addition to inspections specified in 3.1.2-1 of the Rules on the equipment for the prevention of pollution by oil from machinery spaces of all ships, inspections are to be carried out on the following items:

(1) It is to be ensured that the oily-water separating equipment, oil filtering system, processing equipment and oil content meters are in good working order. However, the confirmation of functions may be made by with simulation test or equivalent other methods.

(2) Where oily-water separating equipment, oil filtering system or processing equipment is provided, inspections are to be carried out on the equipment including the wear of associated pumps, piping and fittings.

(3) It is to be ensured that the oil discharge monitoring and control system including the function of the automatic or manual means for stopping discharge of effluent are in good working order. However, confirmation of function may be made by simulation tests or equivalent other methods.

(4) Where inspections on the defects or deterioration or damage of oil content meters (15 ppm alarm and oil discharge monitoring and control equipment for bilge), confirmation on corrections of oil content meters in the presence of the Surveyor are carried out in accordance with the manufacturer's operation or service manuals, the records of corrections are to be confirmed.

2 The following inspections are to be carried out on the equipment for the prevention of pollution by oil carried in bulk by oil tankers, in addition to the inspection items specified in 3.1.2-2 of the Rules: (1) Crude oil washing system

(a) Inspection of crude oil washing pipelines provided outside cargo oil tanks. Where the inspection results are in doubt on their conditions, pressure tests or pipe thickness gauging or both of them are to be carried out. Particular attention is to be paid to areas provided with a doubler by welding.

(b) It is to be ensured that the shut-off valves for the steam heaters of wash watger are in good working order.

(c) The effectiveness of the COW is to be verified to fully comply with the requirements of 3.4 in Part 3 with satisfaction, and, in particular, the items specified in table 2-2 are to be confirmed according to the type of ships and the tanks sulect to tests and examinations.

(2) Inspection of oil discharge monitoring and control equipment and the associated piping arrangements (a) It is to be confirmed that the installations of the oil discharge monitoring and control system are

satisfactory, and are in good working order including the confirmation of the automatic and manual devices provided for stopping the discharge of effluent, the starting interlock system, the response time of oil content meters (within 20 seconds) and the accuracy of flow meters (within ±15% of the actual flow rate). However, the confirmation of function may be done by simulation tests or by equivalent other methods.

(b) Inspections to identify apparent defects or deterioration or damage of the oil discharge monitoring and control system and oil content meters, and where the confirmation on corrections of oil content meters


26

in the presence of the Surveyor were carried out in accordance with the manufactuer's operation or service manual, the records of corrections are to be confirmed.

(3) Confirmation of function of the valves of individual cargo oil tanks, which are to be closed while the ship is at sea, or other similar closing appliances when they are operated manually or remote controlled.

(5) Confirmation of satisfactory operation of oil/water interface detectors

Table 2-2 Veriffication of effectiveness of COW

Type of ships Tank Tests and examinations 1 For oil tankers that

comply with 3.2.4(1)(a) in Part 3

(1) Cargo oil tanks The tests and examinations required for the tanks specjfied in 1(1) in table 2-1 are to be carried out at least on two selected cargo oil tanks. The operation test may be carried out during crude oil washing, water washing or in dock

2 For oil tankers other than those specified in 1 above

(1) Cargo oil tanks (i) Same requirements as specified in (1) above

(2) Cargo oil/ Departure ballast tanks

(i) Same requirements as specified in (1) above (ii) Confirmation of oil floating on top of ballast water;

A measurement is to be made of the amount of oil floating on top of the departure/gale ballast to confirm that the ratio of the volume of oil on top total deperture/gale ballast water to the volume of tanks that contain this water is not to exceed 0.00085. This measurement may need only be applied to one tank of a group of tanks of similar configuration

(3) Cargo oil/ galel ballast tanks

(4) Cargo oil/ Arrival ballast tanks

(i) Same requirements as specified in (1) above (ii) Confirmation of the oil contents of ballast water;

The arrival ballast is to be totally discharged monitoring and control system to confirm that the oil contents of the effluent in this test is not exceed 15ppm. This measyrement may need only be applied to one tank of a group of tanks of similar configuration.

3 The following inspections are to be carried out on the equipment for the prevention of pollution by noxious liquid substances from ships carrying noxious liquid substances in bulk, in addition to the inspections specified in 3.1.2-3 of the Rules.

(1) Prewashing system It is to be ensured that the prewashing system is serviceable. However, when this is impracticable, confirmation may be done only by examining the cargo record book.

(2) Stripping system It is to be ensured that the stripping system is in good working order, and the stripping system is operated effectively with the cargo record book.

(3) It is to be ensured that the underwater discharge outlets are in good order. (4) Discharge recording devices of residues

(a) It is to be ensured that the discharge arrangements of residues and discharge rate control devices are in good working order.

(b) It is to be ensured that the discharge recording devices are serviceable. In this case, simulation tests may be accepted.

(5) Arrangements for discharge to reception facilities It is to be ensured that the arrangements for discharge to reception facilities are serviceable.

(6) Dilute water filling system It is to be ensured that the dilute water filling system is serviceable.

(7) Cargo heating system


27

It is to be ensured that the cargo heating system is serviceable. However, when it is impracticable, this may be done by examining the cargo record book.

(8) Ventilated washing system It is to be ensured that the ventilated washing system is serviceable.

4 It is to be verified that a Shipboard Oil Pollution Emergency Plan and/or a Shipboard Marine Pollution Emergency Plan for Noxious Liquid Substances are/is placed on board the ship and that it is appropriate.

3.3 Special Surveys 3.3.1 General

At Special Surveys, general conditions of the relevant construction and equipment are to be inspected in addition to the relevant items specified in 3.3.2 of the Rules.


1 Inspections specified in 3.2.2-1 of this Part are to be carried out on the equipment for the prevention of pollution by oil from machinery spaces of all ships.

2 The following inspections are to be carried out in addition to those specified in 3.2.2-2 of this Part on the equipment for the prevention of pollution by oil carried in bulk by oil tankers:

(1) Segregated ballast tanks (a) It is to be ensured that the pumps, piping and valve arrangements are in accordance with the

requirements for the segregated ballast tank arrangements. (b) Inspections on the wear of pumps, pipes and valves (c) It is to be ensured that there is no leakage in the ballast pipelines passing cargo oil tanks and the cargo

oil pipelines passing ballast tanks. (2) Crude oil washing system

(a) It is to be ensured that the crude oil washing system is in accordance with the approved plans and the requirements of 3.4 in Part 3 of the Rules. In particular, the following items (i) through (iv) are to be confirmed: (i) Open up inspection of pumps. (ii) Pressure test of the crude oil washing system at the working pressure. (iii) It is to be ensured through internal inspection of cargo oil tanks that the equipment and devices in

cargo oil tanks are in good working order. However, this inspection may be carried out through a continuous survey system considered appropriate by VR or at an appropriate occasion within six months before or after the due date of Special Surveys.

(iv) Where provided, the double stop valve for properly shutting off the lines to steam heaters for water washing is to be subjected to an open up inspection.

(b) Items specified in the preceding (1)(c). (3) Retention of oil on board

It is to be ensured that slop tanks, cargo oil tanks assigned as slop tanks and the associated piping arrangements are in good working order.

(4) Pumps, piping and discharge arrangements It is to be ensured that the pumps, piping and discharge arrangements for discharge of dirty ballast water or oil-contaminated water are satisfactory.

(5) Clean ballast tank arrangement Items specified in the preceding (1)(c).

3 Inspections on the following items are to be carried out on the equipment for the prevention of discharge of noxious liquid substances from ships carrying noxious liquid substances in bulk in addition to the inspections specified in 3.2.2-3 of this Part:

(1) Prewashing system


28

Inspection on the wear of the pumps serving prewashing system, washing machines and wash water heaters.

(2) Stripping system (a) Water tests to confirm the amount of residues from stripping are to be carried out on the stripping

system and the associated pumps by selecting at least two cargo oil tanks. Similar tests may be carried out on other cargo oil tanks as deemed necessary.

(b) Inspection on the wear of the associated pumps and piping arrangements. (3) Discharge outlets below the waterline

Inspection on the wear of the underwater discharge outlets (including the associated pumps and piping arrangements and discharge valves).

(4) Discharge recording devices of residues (a) Inspection on the wear of the associated pumps and control system (where provided at the discharge

side). (b) Inspection to confirm that the accuracy of flow meters is ±15% or higher.

(5) Arrangements for discharge to reception facilities Inspection on the wear of the pumping and piping arrangements.

(6) Dilute water filling system Inspection to confirm wear of the pumping and piping arrangements.

(7) Cargo heating system Inspection to confirm wear of the heating system and piping arrangement.

(8) Ventilated washing system Inspection to confirm wear of the ventilation equipment and piping arrangement.

4 Inspections are to be carried out on the following items for the equipment for the prevention of pollution by sewage from ships:

(1) It is to be ensured that the equipment is provided in accordance with the approved drawings. (2) It is to be ensured that the discharge pipeline and the standard discharge connection specified in 2.2.1, Part

7 of the Rules are provided in accordance with the approved drawings. (3) It is to bo ensured that the equipment in (1) and the pumps relevant to (2) are in good working order. (4) Inspection on the wear of the associated pumps and piping arrangements.

4 It is to be verified that a Shipboard Oil Pollution Emergency Plan and/or a Shipboard Marine Pollution Emergency Plan for Noxious Liquid Substances are/is placed on board the ship and that it is appropriate.


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Chapter 4 OCCASIONAL SURVEYS

4.1 General 4.1.1 Application

The requirements in this chapter apply where the equipment for the prevention of pollution in ships has been conversed, repaired or modified, or where the Shipboard Oil Pollution Emergency Plan and/or the Shipboard marine Pollution Emergency Plan for Noxious Liquid Substances have/has been modified.

4.1.2 Inspection

Occasional Surveys are to be carried out in a manner mutatis mutandis the Special Surveys on the equipment for the prevention of pollution according to the extent of modifications or repairs.


30

Part 3 CONSTRUCTION AND EQUIPMENT FOR THE PREVENTION OF POLLUTION BY OIL

Chapter 1 GENERAL


1 The requirements in this chapter apply to the construction and equipment for the prevention of pollution by oil from ships.

2 For ships of oil tankers designed to have the construction carrying liquid cargo in bulk in part of cargo oil tanks, the requirements relevant to oil tankers specified in 1.1.3, 2.3.2, 3.2.1(4)(b), 3.3.1-1, 3.3.1-3 through 3.3.1-8, and 3.3.2-1 through 3.3.2-4 of the Rules apply to the construction of such cargo spaces. However, where the total volume of the cargo spaces is less than 1,000 m3, the requirements of 3.3.1-2 of the Rules may be applied in place of the requirements of 3.3.1-1 and 3.3.1-3 through 3.3.1-8 of the Rules.

3 Offshore drilling rigs and other platforms for under sea mineral resources are to comply with the requirements which are applied to ships with a gross tonnage of 400 tons and over other than oil tankers.

4 For all hydrofoils, air cushion craft, and other new types of ships (ships proceeding near the sea surface, and ships proceeding under the sea surface, etc.) the application of the requirements in Chapter 2 and Chapter 3 concerning the construction and equipment to which is structurally not reasonable or impossible, they may not be applied. However, this relaxation is conditional that equivalent arrangements have been made on the construction and equipment for the prevention of pollution of these ships in consideration of the purpose of service.

5 Notwithstanding the preceding of -1 to -4, ships not engaged in international voyages are to be dealt with as deemed appropriate by VR.

1.1.2 Terminology

For the purpose of the requirements in this part, the following definitions apply:

(1) "Clean ballast" means the ballast in a tank which since oil was last carried therein, has been so cleaned that effluent therefrom if it were discharged from a ship which is stationary into clean calm water on a clear day would not produce visible traces of oil on the surface of the water or on adjoining shorelines or cause a sludge or emulsion to be deposited beneath the surface of the water or upon adjoining shorelines. If the ballast is discharged through an oil discharge monitoring and control system approved by the Administration, evidence based on such a system to the effect that the oil content of the effluent did not exceed 15 ppm shall be determinative that the ballast was clean, notwithstanding the presence of visible trances.

(2) "Special area" means a sea area where for recognized technical reasons in relation to its ocean graphical and ecological condition and to the particular character of its traffic the adoption of special mandatory methods for the prevention of sea pollution by oil is required. Special area is specified in Regulation 10 of Annex I.

(3) "Instantaneous rate of discharge of oil content" means the rate of discharge of oil in litres per hour at any instant divided by the speed of the ship in knots at the same instant.

(4) "Tank" means an enclosed space which is formed by the permanent structure of a ship and which is designed for the carriage of liquid in bulk.

(5) "Wing tank" means any tank adjacent to the side shell plating. (6) "Center tank" means any tank inboard of a longitudinal bulkhead. (7) "Slop tank" means a tank specifically designed for the collection of tank drainings, tank washings and

other oily mixtures.


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1.1.3 Restriction on oil tanks

1 For ships with a gross tonnage of 400 tons and over, no oil tanks are to be provided in a space afore the fore peak tank or the collision bulkhead.

2 For ships with a gross tonnage of 4,000 tons and over other than oil tankers and oil tankers with a gross tonnage of 150 tons and over, the fuel oil pipelines including fuel oil tanks are to be segregated from the ballast pipelines. However, ships requiring ballast water in empty fuel oil tanks for the proper maintenance of stability and safety may be exempted from this requirement.

3 Ships other than those stated in the preceding -1 and -2 are to satisfy the requirements in the preceding -1 and -2 as far as reasonable and practicable.


32

Chapter 2 EQUIPMENT FOR THE PREVENTION OF POLLUTION BY OIL FROM MACHINERY SPACES


The requirements in this chapter apply to the construction and equipment for the prevention of pollution by oil or oily mixtures produced from the machinery space of all ships.

2.2 Storage and discharge of oily residues (sludge) 2.2.1 Capacity of sludge tanks

1 Every ship of 400 tons gross tonnage and over is to be provided with a tank or tanks of adequate capacity to receive the sludge produced by the purification of fuel oil and lubricating oil, and leaked oil in the machinery space. The capacity of such a tank or tanks is to be greater than the sum of the minimum capacities of individual tanks specified in the following (1) and (2).

(1) The minimum capacity of a tank to receive the sludge produced by the purification of fuel oil and lubricating oil is to be V 1 or V 2 specified in the following (a) to (c): (a) The minimum capacity V 1 of the tank in ships not carrying ballast water in fuel oil tanks, whose keel

was laid before 30 December 1990, or ships at a similar stage of construction: V 1 = K 1 CD (m 3)

where K1 = 0.01: heavy fuel oil which is purified before being used by main engine K1 = 0.005: marine diesel oil or heavy fuel oil but not requiring purification C: fuel oil consumption (t / day) D: maximum number of days between ports where oil sludge can be discharged ashore (when no

detailed data is available, this is to be made greater than 30 days) However, the following values may be used where homogenizer, sludge incinerators or sludge disposal equipment approved by VR are provided:

V1= 1 m3: ships of 400 tons gross tonnage and over not exceeding 4,000 tons gross tonnage V1= 2 m3: ships of 4,000 tons gross tonnage and over

(b) The minimum capacity V 1 of the tank in ships not carrying ballast water in fuel oil tanks, whose keel was laid after 31 December 1990, or ships at a similar stage of construction:

V 1 = K 1 CD (m3) where

K1 = 0.015: heavy fuel oil which is purified before being used by main engine K1 = 0.005: marine diesel oil or heavy fuel oil but not requiring purification C: fuel oil consumption (m3 / day) D: maximum number of days between ports where oil sludge can be discharged ashore (when no

detailed data is available, this is to be made greater than 30 days) However, the following values may be used where homogenizer, sludge incinerators or sludge disposal equipment approved by VR are provided:

V 1 =0.5 + K 1 CD (m3) or

V1= 1 (m3): ships of 400 tons gross tonnage but not exceeding 4,000 tons gross tonnage V1= 2 (m3): ships of 4,000 tons gross tonnage and over whichever is the greater

(c) The minimum capacity V2 of the tank in ships where ballast water is carried in fuel oil tanks: V 2 = V 1 K 2 B (m3)

where


33

V1: tank capacity determined either by (a) or by (b) above K2 = 0.01: when ballast water is carried in heavy fuel oil tanks K2 = 0.005: where ballast water is carried in marine diesel oil tanks B = capacity (tons) of fuel oil tanks connected to the ballast pipelines

(2)The minimum capacity of the tank to receive the oil residues produced by leaked oil in the machinery space is to be V3 as specified below. However, ships whose keel was laid before 31 December 1991, or ships at a similar stage of construction may be exempted from this requirement.

V3 = VE + VL

where VE: tank capacity for waste oil (m3) VL: tank capacity for leaked oil (m3) VE, VL are to be determined by the following calculation:

(a) VE = 1.5n1 (m 3) where n1 is the value obtained by the following: n1 = 1, when the sum of the maximum continuous output of the main engine and auxiliary engines is

1,000 kW and below, n1= a value added by 1 for every increment of 1,000 kW or fraction thereof for the sum of the

maximum continuous output of the main engine and auxiliary engines, when the sum of the maximum continuous output of the main engine and auxiliary engines is over 1,000 kW. However, V E = 0 may be accepted where lubricating oil purifiers are provided and no replacement of lubricating oil is required while the ship is at sea.

(b) VL = D×20×P/106 (m3) P ≤ 10,000 kW

VL = D×(0.2+7×(P-10000)/106 (m3) P >10,000 kW

where P: maximum continuous output of main engine (kW) D: maximum number of days between ports where sludge can be discharged ashore (When no

detailed data is available, it is to be 30 days or more)

2 Notwithstanding the requirements in the preceding -1, in ships listed below where all oily bilge water is exclusively discharged to reception facilities, sludge tanks may be replaced with bilge storage arrangements.

(1) Ships engaged exclusively in voyages in special areas (2) Ships exclusively engaged in voyages in sea areas within 20 nautical miles from the territorial base line of

any one state. (3) Ships not provided with a propulsion engine, which are approved to be appropriate by VR.

2.2.2 Construction of sludge tanks and piping arrangements

1 The construction and piping arrangements of sludge tanks required under the requirements of the preceding 2.2.1 are to meet the following requirements (1) to (3):

(1) Manholes or access holes in a sufficient size are to be provided at such locations that each part of the tank can be cleaned without difficulties.

(2) Appropriate means to facilitate drawing and discharge of oil residues are to be provided. (3) Except for the standard discharge connection specified in 2.2.3 of the Rules, no direct overboard discharge

connections are to be provided.

2 Ships whose keel was laid after 31 December 1990, or in a similar stage of construction are to meet the following requirements, in addition to the preceding -1.

(1) Except for the following cases, the tank discharge pipeline and bilge pipeline are not to be connected each other.


34

(a) A common pipeline with the standard discharge connection specified in 2.2.3. (b) Pipeline for discharging the water which has been settled from the tank. However, this is limited to

cases in which discharge is done through manually operated automatic closing valve or equivalent closing appliances.

(2) Pumps meeting the following requirements are to be provided for discharging oil residues from the tank: (a) Not to serve in common with the oily bilge pump. (b) The pump is to be of the suitable type for discharging sludge ashore. (c) The total head is to be 40 m or more. (d) The pumping rate is to be the following Q 1 or Q 2 whichever is the greater. However, ships whose keel

was laid before 31 December 1991, or in a similar stage of construction may be exempted from this requirement. Notwithstanding this requirement, in ships not engaged in international voyages, the pumping rate may be 0.5 (m3/h)

Q 1 = V / t (m3/ h) where

V: V 1 or V 2 specified in 2.2.1-1(1) of the Rules t: 4 hours Q 2 =2.0 (m3/ h)

(e) The geodetic suction head of the pump is to meet the following requirements: 3.0 m: P ≤ 15,000 kW 3.5 m: P >15,000 kW

where P: maximum continuous output of main engine (kW)

2.2.3 Standard discharge connection

To enable pipes of reception facilities to be connected with the ship's discharge pipeline of the sludge tank provided under the requirements of the preceding 2.2.2, a standard discharge connection in accordance with Table 3-1 is to be provided.

2.3 Oily-water separating equipment, oil filtering system, oil discharge monitoring and control system

for bilge, and bilge water holding tanks 2.3.1 Oily-water separating equipment

Oily-water separating equipment is to be of a design approved by VR and to be such as will ensure that any oily mixture discharged into the sea after passing through the oily-water separating equipment is to have an oil content of not more than 100 ppm.

2.3.2 Oil filtering system

An oil filtering system is to meet either of the following requirements (1), (2) or (3) according to the type and size of ship, and trade area:

(1) It is to be of a design approved by VR and to be such as will ensure that any oily mixture discharged into the sea after passing through the filtering system is to have an oil content of not more than 15 ppm.

(2) It is to be satisfied with the requirements in (1) and to be fitted with an approved type of audible and visible alarm devices which automatically operates when the oil content in the effluent exceeds 15 ppm, and which also automatically operates when defects or failures of the measuring function occur.

(3) It is to be satisfied with the requirements in (2) and to be provided with an automatic discharge stopping device such as will ensure automatic stopping of the system when the oil content of the effluent exceeds 15 ppm.

2.3.3 Oil discharge monitoring and control system for bilge


35

An oil discharge monitoring and control system is to be of a design approved by VR and to have the following function:

(1) It is to be fitted with a device capable of continuously recording the oil content in ppm. (2) Recording function referred in (1) above is to include time and date. (3) It is to come into function simultaneously with the start of discharge of the effluent into the sea. (4) When the oil content in the effluent exceeds 100 ppm, or when defects or failures of the measuring units

occur, audible and visible alarms are to be issued with automatic stopping of the discharge of oily mixtures.

Table 3.1 Standard dimensions of discharge connection flange

Item Requirements

Outside diameter 215 mm

Inside diameter An diameter reasonably corresponding to the outside diameter

Pitch circle diameter 183 mm

Flange groove Six 22 mm-dia holes are to be drilled on the above pitch circle dia at equal angular intervals, and grooves of 22 mm wide from these holes reaching the outer periphery of the flange are to be machined.

Thickness of flange 20 mm

Number and diameter of bolts and nuts with a proper length

6 sets 20 mm in diameter

Flanges are to be of steel or equivalent material with plain surfaces. This flange is to withstand a service pressure of 0.6 MPa when an oil-resistant gasket is inserted.

215

mm

22 m

m

183 mm

20 m

m


36

2.3.4 Bilge water holding tanks

Bilge water holding tanks are to satisfy the following requirements:

(1) Capacity of the bilge water holding tank (C (m3)) is to be the value obtained by the following formula or more. However, ships whose keel was laid before 31 December 1991, ships in a similar stage of construction, ships of less than 400 tons gross tonnage and oil tankers of less than 150 tons gross tonnage may be exempted from these requirements. (a) Ships whose maximum continuous output of main engine is less than 1,000 kW

C =1.5 (m3) (b) Ships whose maximum continuous output of main engine is 1,000 kW or more but less than 20,000 kW

C =1.5+(P -1,000)/1,500 (m3) where

P: maximum continuous output of main engine (kW) (c) Ships whose maximum continuous output of main engine is 20,000 kW or more

C =14.2+0.2(P -20,000)/1,500 (m3) where

P: maximum continuous output of main engine (kW) (2) Bilge water holding tanks are to be provided with a device capable of measuring the quantity of bilge. (3) It is to be ensured that no leakage of bilge occurs even when the ship pitches through 10 degrees and rolls

by 22.5 degrees either side. (4)The arrangement is to be such that it is capable of transferring bilge to both the bilge water holding tank

and shore reception facilities. In this case, it is to be provided with a standard discharge connection specified in Table 3-1 in 2.2.3.

2.4 Requirements for installation 2.4.1 General

1 For all oil tankers and ships of 400 tons gross tonnage and over other than oil tankers, oil filtering systems are to be provided for discharging oily bilge water from the machinery space or other oil in accordance with Table 3-2-1.

Table 3-2-1 Installation requirements for oil filtering system

Gross tonnage

Trade area and type of ship Less than 150

150 and over but less than

400

400 and over but less than 10,000

10,000 and over

Oil tankers ⎯ (II) Ships exclusively engaged in voyages in special area Ships other than oil

tankers ⎯ (I)* (II)

Oil tankers ⎯ (I) (II) Ships other than above Ships other than oil

tankers ⎯ ⎯ (I) (II)

Remarks:

Symbols in the table signify the following equipment; (I) Oil filtering system specified in 2.3.2(1) (II) Oil filtering system specified in 2.3.2(3) *: For ships exclusively engaged in voyages in Antarctic area


37

Table 3.2.2 Installation requirements for oil discharge monitoring and control system and oily-water separating equipment

Gross tonnage

Trade area and type of ship Less than 150


400


10,000

10,000 and over

Oil tankers ⎯ Ships exclusively engaged in voyages within 12 nautical miles

Ships other than oil tankers

⎯ B D

Oil tankers ⎯ C EShips other than oil

tankers Ships other than oil tankers

⎯

Remarks:

Symbols in the table signify the following equipment; B : Oil filtering system specified in 2.3.2(1) C : Oily-water separating equipment specified in 2.3.1 or oil filtering system specified in 2.3.2(1) D : Oil filtering system specified in 2.3.2(2) E : Oily-water separating equipment specified in 2.3.1 and oil discharge monitoring and control system specified in

2.3.3, or oil filtering system specified in 2.3.2(2)

2 Notwithstanding the requirements in the preceding -1, for ships delivered before 6 July 1993 (excluding ships exclusively engaged in voyages in special area), oil filtering systems in accordance with Table 3-2-1 are to be provided for discharging oily bilge water from the machinery space or other oil by 6 July 1998 provided that these ships are equipped with systems in accordance with Table 3-2-2.

2.4.2 Modifications

1 Except ships exclusively engaged in voyages in special area, for ships of 4,000 tons gross tonnage and above other than oil tankers and oil tankers of 150 tons gross tonnage and above, the equipment required according in the column for ships of 10,000 tons gross tonnage and above are to be provided for discharging dirty ballast water carried in the fuel oil tanks in accordance with 1.1.3-2 into the sea.

2 Notwithstanding the requirements in the preceding 2.4.1, for ships listed below where all of the oily bilge is intended to be discharged exclusively to reception facilities, oily-water separating equipment, oil filtering system and oil discharge monitoring and control equipment may be substituted with bilge water holding tanks.

(1) Ships exclusively engaged in voyages in special areas. (2) Ships with gross tonnage of less than 500 tons and exclusively engaged in voyage within 20 nautical miles

from the territorial base line of any one state. (3) Ships delivered before 6 July 1993 with gross tonnage of not less than 500 tons and exclusively engaged

in voyage within 20 nautical miles from the territorial base line of any one state. In this case, ships are to comply with the requirement 2.4.1-1 by 6 July 1998.

(4) Ships not provided with a propulsion engine, and considered to be appropriate by VR.


38

Chapter 3 CONSTRUCTION AND EQUIPMENT FOR THE PREVENTION OF POLLUTION BY OIL CARRIED IN BULK


1 The requirements in this chapter apply to construction and equipment for the prevention of pollution by oil carried in bulk in oil tankers.

2 The requirements of 3.2.4 are to be applied to oil tankers of 600 tons deadweight and above: (1) for which the building contract is placed on or after 6 July 1993, or (2) in the absence of a building contract, the keels of which are laid or which are at a similar stage of

construction on or after 6 January 1994, or (3) the delivery of which is on or after 6 July 1996, or (4) which have undergone a major conversion:

(a) for which the contract is placed after 6 July 1993; or (b) in the absence of a contract, the construction work of which is begun after 6 January 1994; or (c) which is completed after 6 July 1996.

3 The requirements of 3.2.2-6 and -7 are to apply to oil tankers of 5,000 tons deadweight and above: (1) For which the building contract is placed on or after 1 february 1999, or (2) In the absence of a building contract, the keels of which are laid or which are at a similar stage of

construction on or after 1 August 1999, or (3) The delivery of which is on or after 1 February 2002, or (4) Which have undergone a major conversion:

(a) For which the contract is placed after 1 February 1999, or (b) In the absence of a conttract, the construction work of which begun after 1 August 1999, or (c) Which is completed after 1 February 2002

3.2 Hull construction 3.2.1 Arrangement of bulkheads in spaces carrying cargo oil

For spaces carrying oil cargoes, oil-tight bulkheads are to be arranged so that hypothetical oil outflow and the restricted size of individual cargo oil tanks might not be exceeded due to damage defined as below.

(1) For the purpose of calculating hypothetical oil outflow from oil tankers, three dimensions of damage of a parallel piped on the side and bottom of the ship are assumed in accordance with Table 3-3 and Table 3-4

Table 3-3 Extent of side damage

Direction Extent of damage

Longitudinal (lc) 1/3 Lf2/3 or 14.5 m, whichever is less

Transverse extent (tc) B/5 or 11.5 m, whichever is less (inboard from the ship 's side at right angles to the centreline at the level corresponding to the assigned summer free board)

Vertical extent (vc) From the moulded line of the bottom shell plating at centreline, upwards without limit


39

(2) The hypothetical outflow of oil in the case of side damage (Oc ) and bottom damage (Os) are to be calculated by the following formulae with respect to compartments breached by damage to all conceivable locations along the length of the ship up to the extent as defined in (1). (a) (i)for side damage:

Oc = ∑wi + ∑KiCi (I) (ii) for bottom damage:

Os = 1/3(∑Ziwi + ∑ZiCi) (II) In the case where bottom damage simultaneously involves four centre tanks, the value of Os may be calculated according to the formula.

Os = 1/4(∑Ziwi + ∑ZiCi) (III) where

wi: volume of a wing tank in m3 assumed to be breached by the damage as specified in (1); for a segregated ballast tank may be taken equal to zero,

Ci: volume of a centre tank in m3 assumed to be breached by the damage as specified in (1); for a segregated ballast tank may be taken equal to zero,

Ki = 1-bi/tc

where bi is equal to or greater than tc, Ki is to be taken equal to zero. Zi=1-hi/vs

where hi is equal to or greater than vs, Zi may be taken equal to zero. bi: minimum width of wing tank in m under consideration measured inboard from the ship's

side at right angles to the centreline at the level corresponding to the assigned summer freeboard.

hi: minimum depth of the double bottom in m under consideration; where no double bottom is fitted is to be taken equal to zero.

Table 3-4 Extent of bottom damage

Extent of damage

Direction For 0.3Lf from the forward perpendicular of the ship

Any other part of the ship

Longitudinal (ls) Lf/10 Lf/10 or 5 m, whichever is less

Transverse extent (ts) B/6 or 10 m, whichever is less but not less than 5 m 5 m

Vertical extent (vs) B/15 or 6 m, whichever is less, measured from the moulded line of the bottom shell plating at centre line.

(b) If a void space or segregated ballast tank of a length less than lc as defined in (1) is located between

wing oil tanks, Oc in formula (I) in (a)(i) may be calculated on the basis of volume wi being the actual volume of one such tank or the smaller of the two tanks adjacent to such space, multiplied by Si as defined below and taking for all other wing tanks involved in such a collision the value of the actual full volume.

Si = 1 - li/lc

where li: length of void space or segregated ballast tank under consideration.

(c) Calculations in (a) above are to be done in accordance with the following (i) to (iii): (i) Credit is only be given in respect of double bottom tanks which are either empty or carrying clean

water where cargo oil is carried in the tanks above. (ii) Where the double bottom does not extend for the full length and width of the tank involved, the

double bottom is considered nonexistent and the volume of the tanks above the area of the bottom


damage is to be included in formula (II) or (III) of (a)(i) even if the tank is not considered breached because of the installation of such a partial double bottom.

(iii) Suction wells may be neglected in the determination of the value hi, provided such wells are not excessive in area and extend below the tank for a minimum distance, and in no case more than half the height of the double bottom. If the depth of such a well exceeds half the height of the double bottom, hi is to be taken equal to the double bottom height minus the well height. Piping serving such wells if installed within the double bottom is to be fitted with valves or other closing arrangements located at the point of connection to the tank served to prevent oil outflow in the event of damage to the piping. Such piping is to be installed as high from the bottom shell as possible.

(3) Cargo tanks of oil tankers are to be of such size and arrangements that the hypothetical outflow Oc or Os, calculated in accordance with the requirements of (2) any where in the length of the ship does not exceed 30,000 m3 or 3400 DW , whichever is the greater, but subject to a maximum of 40,000 m3. However, for equipment capable of transferring oil from damaged cargo oil tank or tanks to a segregated ballast tank or a cargo oil tank with which sufficient ullage can be obtained, and that the cargo oil tank is fitted with a high oil suction device for an emergency, formula (III) of the provision in (2) may be used.

It is conditional here that the equipment is capable of transferring oil in the quantity equivalent to half the largest capacity among damaged tanks in 2 hours of operation, and that the ballast tank or cargo oil tank can receive all of the said amount of oil. The piping for the high oil suction device is to be installed at an elevation greater than the vertical extent of bottom damage.

(4) Individual cargo oil tanks are not to exceed the following size: (a) The volume of any one wing cargo oil tank of an oil tanker is not to exceed 75% of the limits of the

hypothetical oil outflow referred to in (3). The volume of any one center cargo oil tank is not to exceed 50,000 m3. However, in segregated ballast oil tankers as defined in 3.2.3, the permitted volume of a wing cargo oil tank situated between two segregated ballast tanks, each exceeding lc in length, may be increased to the maximum limit of hypothetical oil outflow provided that the width of the wing tanks exceeds tc.

(b) The length of each cargo tank is not to exceed 10 m or one of the following values, whichever is the greater; (i) Where no longitudinal bulkhead is provided inside the cargo tanks:

fLBbn )1.05.0( +

but not to exceed 0.2Lf

(ii) Where a centreline longitudinal bulkhead is provided inside the cargo tanks:

fLBbn )15.025.0( +

(iii) Where two or more longitudinal bulkheads are provided inside the cargo tanks:

− for wing cargo tanks: 0.2Lf − for centre cargo tanks:

+ if bn/B is equal to or greater than 1/5: 0.2 Lf

+ if bn/B is less than 1/5: where no centreline longitudinal bulkhead is provided:

fLBbn )1.05.0( +

where a centreline longitudinal bulkhead is provided:

fLBbn )15.025.0( +

40


41

" bn " is the minimum distance in m from the ship's side to the outer longitudinal bulkhead of the tank in question measured inboard at right angles to the centreline at the level corresponding to the assigned summer freeboard.

(5) In order not to exceed the volume limits established by the requirements of (3) and (4) and irrespective of the accepted type of cargo transfer system installed, where the system defined in (3) interconnects two or more cargo tanks, valves (including other similar closing devices) are to be provided, for separating the tanks from each other.

(6) Lines of piping which are connected with cargo tanks in a position less than tc from the ship's side or less than vs from the ship's bottom are to be fitted with valves or similar closing devices at the point at which they open into any cargo oil tank.

3.2.2 Subdivisions and stability

1 Every oil tanker is to comply with the subdivision and damage stability criteria as specified in 3.2.2-3 after the assumed side or bottom damage as specified in 3.2.2-2, for any operating draught reflecting actual partial or full load conditions consistent with trim and strength of the ship as well as specific gravity of the cargo. Such damage is to be applied to locations along the length of the ship as shown in the following (1) to (3):

(1) In tankers of more than 225 m in length, anywhere in the ship's length (2) In tankers of more than 150 m, but not exceeding 225 m in length, anywhere in the ship's length except

involving either after or forward bulkhead bounding the machinery space located aft. The machinery space is to be treated as a single floodable compartment.

(3) In tankers not exceeding 150 m in length, anywhere in the ship's length between adjacent transverse bulkheads with the exception of the machinery space. For tankers of 100 m or less in length where all requirements in 3.2.2-3 cannot be fulfilled without materially impairing the operational qualities of the ship, VR may allow relaxation from these requirements. Ballast conditions where the tanker is not carrying oil (excluding oil residues) in cargo tanks, is not to be considered.

2 The following requirements regarding the extent and the character of the assumed damage are to apply:

(1) The extent of side damage is to be as shown in Table 3-5. (2) The extent of bottom damage is to be as shown in Table 3-6.

Table 3-5 Extent of side damage


Longitudinal extent 1/3 Lf2/3 or 14.5 m, whichever is less

Transverse extent B/5 or 11.5 m, whichever is less (inboard from the ship 's side at right angles to the centreline at the level corresponding to the assigned summer loadline)

Vertical extent From the moulded line of the bottom shell plating at centreline, upwards without limit

(3) If any damage of lesser extent than the maximum extents of damage specified in (1) and (2) results in a more severe condition, such damage is to be assumed.

(4) Where the damage involving transverse bulkheads is envisaged as specified in 3.2.2-1(1) and (2), transverse watertight bulkheads are to be spaced at least at a distance equal to the longitudinal extent of assumed damage specified in (1) in order to be considered effective. Where transverse bulkheads are spaced at a lesser distance one or more of these bulkheads within such extent of damage are to be assumed as nonexistent for the purpose of determining flooded compartments.


42

Table 3.6 Extent of bottom damage

Extent of damage

Direction For 0,3Lf from the forward perpendicular of the ship

Any other part of the ship

Longitudinal 1/3 Lf2/3 or 14.3 m, whichever is less 1/3 Lf

2/3 or 5 m, whichever is less

Transverse extent B/6 or 10 m, whichever is less B/6 or 5 m, whichever is less

Vertical extent B/15 or 6 m, whichever is less, measured from the moulded line of the bottom shell plating at centreline.

(5) Where the damage between adjacent watertight bulkheads is envisaged as specified in 3.2.2-1(3), no main

transverse bulkhead or a transverse bulkhead bounding side tanks or double bottom tanks are to be assumed damaged, unless: (a) the spacing of the adjacent bulkheads is less than the longitudinal extent of assumed damage specified

in (1); or (b) there is a step or a recess in a transverse bulkhead of more than 3.05 m in length, located within the

extent of penetration of assumed damage. The step formed by the after peak bulkhead and after peak tank top is not to be regarded as a step for the purpose of the requirements of 3.2.2.

(6) If pipes, ducts or tunnels are situated within the assumed extent of damage, arrangements are to be made so that progressive flooding cannot thereby extend to compartments other than those assumed to be floodable for each case of damage.

3 Oil tankers are to be regarded as complying with the damage stability criteria if the following requirements as shown (1) to (5) are met:

(1) The final waterline, taking into account sinkage, heel and trim, are to be below the lower edge of any opening through which progressive flooding may take place. Such openings are to include air pipes and those which are closed by means of weathertight doors or hatch covers and may exclude those openings closed by means of watertight manhole covers and flush scuttles, small watertight cargo tank hatch covers which maintain the high integrity of the deck, remotely operated watertight sliding doors, and side scuttles of the non-opening type.

(2) In the final stage of flooding, the angle of heel due to unsymmetrical flooding is not to exceed 25 degrees, provided that this angle may be increased up to 30 degrees if no deck edge immersion occurs.

(3) It may be regarded as sufficient if the righting lever curve has at least a range of 20 degrees beyond the position of equilibrium in association with a maximum residual righting lever of at least 0.1m. The area within this range below the curve is to be 0.0175 m.radian or more. Except for the case in which the relevant compartments are assumed flooded, unprotected openings are to be assumed not to immerse. Within this range, all openings listed in (1) and other openings which can be closed with a weathertight cover may be accepted by VR.

(4) It is to be satisfied that the stability is sufficient during intermediate stages of flooding.

(5) Even in cases where an equalizing system requiring the mechanical aid such as valves or inter-connecting pipes for the purpose of reducing the heel angle or of acquiring the minimum residual stability are provided for complying with the requirements in (1) to (3), such provisions are not to be taken into account, and sufficient residual stability is to be maintained in all stages of service of the equalizing system. Compartments connected through ducts with a large sectional area may be considered to be common.


43

4 The requirements in the preceding -1 above are to be confirmed by calculations which take into consideration the design characteristics of the ship, the arrangements, configuration and contents of the damaged compartments; and the distribution, specific gravity and the free surface effect of liquids. The calculations are to be based on the following requirements (1) through (5):

(1) Account is to be taken of any empty or partially filled tanks, the specific gravity of cargoes carried as well as any outflow of liquids from damaged compartments.

(2) The permeabilities are to be assumed as given in Table 3-7. (3) The buoyancy of any superstructure directly above the side damage is to be disregarded. The

unflooded parts of superstructure beyond the extent of damage, however, may be taken into consideration provided that they are separated from the damaged space by watertight bulkheads and the requirements in the preceding 3.2.2-3(1) in respect of these intact spaces are complied with. Hinged watertight doors may be acceptable in watertight bulkheads in the superstructure.

(4) The free surface effect is to be calculated at an angle of heel of 5 degrees for each individual compartment. VR may require or allow the free surface corrections to be calculated at an angle of heel greater than 5 degrees for partially filled tanks.

(5) In calculating the effect of free surface of consumable liquid it is to be assumed that, for each type of liquid at least one transverse pair or a single centerline tank has a free surface and the tank or combination of tank to be taken into account is to be those where the effect of free surface is the greatest.

5 Every oil tanker to which the requirements in this Part apply is to be provided with the following (1) and (2):

(1) Information relative to loading and distribution of cargo necessary to ensure compliance with the requirements of 3.2.2; and

(2) Data on the ability of the ship to comply with damage stability criteria as determined by 3.2.2, including the effect of relaxation that have been allowed under the preceding 3.2.2-1(3).

Table 3-7 Permeabilities

Spaces Permeability

Appropriated to stores 0.60

Occupied by accumulation 0.95

Occupied by machinery 0.85

Voids 0.95

Intended for consumable liquids 0 - 0.95*

Intended for other liquids 0 - 0.95*

Note: * The permeability of partially filled compartment is to be consistent with the amount of liquid carries. Whenever

damage extends to any tank carrying liquid, it is to be assumed that the content is totally flows out of the compartment replaced salt water up to the level of final plan of equilibrium.

6 Oil tankers of 5,000 tons deadweight and above are to comply with the following intact stability criteria under the worst possible conditions of cargo and ballast loading during the liquid transfer operations. The liquid transfer operations specified in -6 and -7 means the transfer operations of liquid carried on board such as cargo loading/unloading, lightering, ballasting/deballasting, ballast water exchange nad tank cleaning. However, this does not include asymmetric ballasting/loading where. In the ships with longitudinal bulkheads, all tanks on one side are empty and all tanks on the other side are slack/full.

(1) At sea, the requirements in 2.2.1-1 TCVN 6259-10:2003 is to be satisfied; (2) In port, the initial metacentric height GoM is to be not less than 0.15m

tcvn 6276: 2003, Part 3, Chapter 3 7 For combination carriers of 5,000 tons deadweight and above, instead of the compliance with the

requirements of preceding -6, the information for intact stability during the liquid transfer operations as deemed appropriate by VR may be prominently displayed in the approved stability booklet and at the cargo control station and in any computer by wich stability calculations are performed, where installed.

3.2.3 Segregated ballast tanks

Every crude oil tanker of 20,000 tons deadweight and over and products carrier of 30,000 tons deadweight and over are to be provided with segregated ballast tanks of the following capacities and arrangements. However, it is no need to comply with the provisions of following requirements in (2) where the paragraph 3.2.4 is applied:

(1)The capacity of the segregated ballast tanks in all cases of ballast conditions including the light weight plus segregated ballast only are to be such that the ship's draughts and trim can meet each of the following requirements (a) to (c). However, the segregated ballast conditions for oil tankers less than 150 m in length are to be to the satisfaction of VR. (a) the moulded draught amidships (dm) in m (without taking into account any ship's deformation) is to be

not less than: 2.0 + 0.02Lf

(b) the draughts at the forward and after perpendiculars are to correspond to those determined by the draught amidships (dm) as specified in (a) of this paragraph, in association with the trim by the stern of not greater than 0.015 L: and

(c) in any case the draught at the after perpendicular is not to be less than that which is necessary to obtain full immersion of the propeller(s).

(2) The segregated ballast tanks situated within the cargo oil spaces are to meet the following requirements (a) to (c) to provide a measure of protection against oil outflow in the event of grounding or collision: (a) The segregated ballast tanks and enclosed spaces other than cargo oil tanks within the cargo tank

length (Lt) are to be so arranged as to comply with the following requirements: )]2([ DBLtJPAsPAc +≥Σ+Σ

where PAc : the side shell area in m2 for each segregated ballast tank or space other than an oil tank based

on projected moulded dimensions, PAs : the bottom shell area in m2 for each such tank or space based on projected moulded

dimensions, Lt : length in m between the forward and after extremities of the cargo tanks, D : moulded depth in m measured vertically from the top of the keel to the top of the freeboard

deck beam at side amidships. In ships having rounded gunwales, the moulded depth is to be measured to the point of intersection of the moulded lines of the deck and side shell plating, the lines extending as though the gunwale were of angular design,

J : 0.45 for oil tankers of 20,000 tons deadweight, 0.30 for oil tankers of 200,000 tons deadweight and above, subject to the provisions of paragraph (b) of this regulation.

For intermediate values of deadweight the value of J are to be determined by linear interpolation. (b) For oil tankers of 200,000 tons deadweight and over, the value of J may be reduced as follows:

Jreduced = [J-(a-Oc+Os/4OA)] or 0.2, whichever is the greater where a: 0.25 for oil tankers of 200,000 tons deadweight;

0.40 for oil tankers of 300,000 tons deadweight; 0.50 for oil tankers of 420,000 tons deadweight and above For oil tankers of intermediate deadweight tonnage between the above, the value of a is to be determined by linear interpolation

Oc and Os: the values specified in 3.2.1(2) OA: allowable oil outflow specified in 3.2.1(3)

44


45

(c) For determining PAc and PAs for enclosed spaces other than segregated ballast tanks and cargo oil tanks, the requirements in the following (i) and (ii) are to be complied with: (i) The width of a full-depth wing tank, a wing tank with a depth extending from other enclosed space or

deck to the top of double bottom or other enclosed space is not to be less than 2 m. The width of a wing tank or other enclosed space is to be measured inboard from the ship side at right angles to the centreline of the ship. Any wing tank or other enclosed space with the minimum width of less than 2 m is not to be considered in determining PAc.

(ii) The minimum vertical depth of each double bottom tank or other enclosed space is not to be less than B /15 or 2 m, whichever is less. Double bottom tanks or other enclosed spaces with the minimum depth of less than the above value are not considered in determining PAs. The minimum width and minimum depth of wing tanks or double bottom tanks are to be measured clear of the bilge area and, in the case of minimum width, are to be measured clear of any rounded gunwale area.

3.2.4 Prevention of oil pollution in the event of collision or stranding

(1) Every oil tanker of 5,000 tons deadweight and above is to comply with any one of the following requirements (a) to (c):

(a) The entire cargo tank length is to be protected by ballast tanks or spaces other than cargo and fuel oil tanks as follows: (i) Wing tanks or spaces are to extend either for the full depth of the ship's side or from the top of the

double bottom to the uppermost deck, disregarding a rounded gunwale where fitted. They are to be arranged such that the cargo tanks are located inboard of the moulded line of the side shell plating, nowhere less than the distance ω which, as shown in Fig. 3.1, is measured at any cross-section at

right angles to the side shell, as specified below: 000,20

5.0 DW+=ω or 2.0 m, whichever is the

lesser. However, the minimum value of ω = 1.0 m

(ii) At any cross-section the depth of each double bottom tank or space is to be such that the distance h between the bottom of the cargo tanks and the moulded line of the bottom shell plating measured at right angles to the bottom shell plating as shown in Fig. 3.1 is not less than specified below: h = B /15 or 2.0 m, whichever is the lesser. However, the minimum value of h = 1.0 m

(iii)When the distances h and ω are different at turn of the bilge area or at locations without a clearly defined turn of the bilge, the distance ω is to have preference at levels exceeding 1.5h above the base line as shown in Fig. 3.1.

(iv)On crude oil tankers of 20,000 tons deadweight and above and product carriers of 30,000 tons deadweight and above, the aggregate capacity of wing tanks, double bottom tanks, forepeak tanks and afterpeak tanks are not to be less than the capacity of segregated ballast tanks necessary to meet the requirements of 3.2.3(1). Wing tanks or spaces and double bottom tanks used to meet the requirements of 3.2.3(1) are to be located as uniformly as practicable along the cargo tank length. Additional segregated ballast capacity provided for reducing longitudinal hull girder bending stress, trim, etc., may be located anywhere within the ship.

h ≥ ω

ω

ω

c L

h h

h <ω ω

ω

Base line 1.5

h

h

cL

Fig. 3.1

h

c L


(v) Suction wells in cargo tanks may protrude into the double bottom below the boundary line defined by the distance h provided that such wells are as small as practicable and the distance between the well bottom and bottom shell plating is not to be less than 0.5 h.

(vi)Ballast piping and other piping such as sounding and vent piping to ballast tanks are not to pass through cargo tanks. Cargo piping and similar piping to cargo tanks are not to pass through ballast tanks. Exemptions to this requirement may be granted for short lengths of piping, provided that they are completely welded or equivalent.

(b) The entire cargo tank length is to be protected by mid-deck plating, ballast tanks or spaces other than cargo and fuel oil tanks as follows: (i) The cargo and vapour pressure exerted on the bottom shell plating forming a single boundary

between the cargo and the sea is not to exceed the external hydrostatic water pressure as expressed by the following formula:

f.hc.ρc + 100.∆p ≤ dn.ρs.g where:

hc : height of cargo in contact with the bottom shell plating in m ρc : maximum cargo density in t/m3

dn : minimum operating draught under any expected loading condition in m ρs : density of sea water in t/m3

∆p : maximum set pressure of pressure/vacuum valve provided for the cargo tank in bars f : safety factor = 1.1 g : standard acceleration of gravity = 9.81 m/sec.2

(ii) Any horizontal partition necessary to fulfill the above requirements is to be located at a height of not less than B /6 or 6m, whichever is the lesser, but not more than 0.6 D, above the base line where D is the moulded depth amidships.

(iii) The location of wing tanks or spaces is to be as defined in 3.2.4(1)(a)(i) except that, below a level 1.5 h above the baseline where h is as defined in 3.2.4(1)(a)(ii), the cargo tank boundary line may be vertical down to the bottom plating, as shown in Fig. 3.2.

(iv) On crude oil tankers of 20,000 tons deadweight and above and product carriers of 30,000 tons deadweight and above, the aggregate capacity of wing tanks, forepeak tanks and afterpeak tanks are to be comply with the requirements of 3.2.4(1)(a)(iv).

(v) Ballast piping and cargo piping are to be comply with the requirements of 3.2.4(1)(a)vi).

Base line

ω

ω

Fig. 3.2

1.5.

h

C L

(c) Other methods of design and construction of oil tankers may be accepted as alternatives to the

requirements prescribed in 3.2.4(1)(a), provided that such methods ensure at least the same level of protection against oil pollution in the event of collision or stranding by VR.

(2) For oil tankers of 20,000 tons deadweight and above, the damage assumptions prescribed in 3.2.2-2(2) are

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47

to be supplemented by the assumed bottom raking damage in accordance with Table 3-8.

Table 3-8 Extent of bottom raking damage


Longitudinal extent

ships 75.000 tons deadweight and above: 0.6 Lf measured from the forward perpendicular

ships of less than 75,000 tons deadweight: 0.4 Lf measured from the forward perpendicular

Transverse extent B/3, any where in the bottom

Vertical extent Breach of outer hull

(3) Oil tankers of less than 5,000 tons deadweight are to comply with the following requirements (a) and (b):

(a) Double bottom tanks or spaces in accordance with 3.2.4(1)(a)(ii) are to be arranged along the entire cargo tank length. However, the distance h specified in 3.2.4(1)(a)(ii) may comply with the following:

h = B /15 (m) However, the minimum value of h = 0.76 m in the turn of the bilge area and at locations without a clearly defined turn of the bilge, the cargo tank boundary line is to run parallel to the line of the mid-ship flat bottom as shown in Fig. 3.3.

(b)The capacity of each cargo tanks is not to exceed 700 m3 unless wing tanks or spaces in accordance with 3.2.4(1)(a)(i) are arranged along the entire cargo tank length. However, the distance ω specified in 3.2.4(1)(a)(i) may comply with the following:

000,204.24.0 DWw += (m)

However, the minimum value of h =0.76 m

Fig. 3.3

hBase line

h

C L

(4) Notwithstanding the requirement of 1.1.3-1, for an oil tanker of 500 tons gross and over, which is engaged

in international voyages and whose keel was laid or was at a similar stage of construction on and after 1 September 1984, oil is not to be carried in any space extending forward of a collision bulkhead located in accordance with 11.1.1-1, Part 2A of the Rules for the Classification and Construction of Sea-going Steel Ships. An oil tanker other than the above is not to carry oil in any space extending forward of the


48

transverse plane perpendicular to the centreline that is located as if it were a collision bulkhead located in accordance with that requirement.

3.3 Installations and piping arrangements 3.3.1 Installations for the retention of oil on board

1 Oil tankers of 150 tons gross tonnage and above are to be provided with appropriate cargo tank washing arrangements.

2 Oil tankers of less than 150 tons gross tonnage are to be provided with the arrangement for the retention of oily mixtures on board for subsequent discharge to reception facilities. However, where arrangements for the discharge of oil are provided in accordance with the requirements of 3.3.2, this requirement may be dispensed with.

3 Oil tankers of 150 tons gross tonnage and over are to be provided with the arrangement of at least one slop tank with a sufficient capacity necessary to retain the slops, oil residues and dirty ballast residues generated by tank washing, meeting the requirements of the following 3.3.1-4 through 3.3.1-8, and oil tankers over 70,000 tons deadweight are to be provided with the arrangements of at least two slop tanks. The total capacity of the slop tank is, except for the cases shown in the following (1) to (3), to be 3% or more of the oil-carrying capacity of the ship.

(1) The total capacity of the slop tank of any oil tanker where the amount of tank washings collected in one or more slop tanks is sufficient for carrying out further tank washing without any additional water, an eductor is provided, and the tank washing arrangement is capable of supplying a sufficient amount of eductor-driving fluid, is to be 2% or more.

(2) The total capacity of the slop tank of any oil tanker provided with the segregated tank arrangement in accordance with the requirements of 3.2.3, or any oil tanker provided with the crude oil washing system in accordance with the requirements of 3.4, is to be 2% or more. However, the total capacity of the slop tank where the amount of tank washings collected in one or more slop tanks is sufficient for carrying out further tank washing without any additional water, an eductor is provided, and the tank washing arrangement is capable of supplying a sufficient amount of eductor-driving fluid, may be reduced to 1.5% or more.

(3)The total capacity of slop tank of any combination carrier where cargo oil is carried exclusively in tanks with smooth wall surfaces, is to be 1% or more. However, the total capacity of the slop tank where the amount of tank washings collected in one or more slop tanks is sufficient for carrying out further tank washing without any additional water, an eductor is provided, and the tank washing arrangement is capable of supplying a sufficient amount of eductor-driving fluid, may be reduced to 0.8% or more.

4 Slop tanks are to be so designed particularly in respect of the position of inlets, outlets, baffles or wires where fitted, so as to avoid excessive turbulence of oil or emulsion with the water.

5 Adequate means are to be provided for cleaning the cargo tanks and transferring the dirty ballast residue and tank washings from the cargo tanks into a slop tank.

6 The slop tank arrangement is to be provided with the oil discharge monitoring and control system for ballast water having the following performance, and approved to be appropriate by VR.

(1) A recording device to provide a continuous record of the discharge in litres per nautical mile and total quantity discharged, or the oil content and rate of discharge is to be incorporated in the system.

(2) The record referred to in (1) is to be identifiable as to time and date. (3) The oil discharge monitoring and control system is to come into operation when there is any discharge of

effluent into the sea. (4) The oil discharge monitoring and control system is to be provided with alarm devices which give visible

and audible alarming when the instantaneous rate of discharge of oil exceeds 30 litres per nautical mile,


49

when the total quantity discharged into the sea exceeds 1/30,000 of total quantity of cargo constituted in part by oil mixture in question or when failure of the oil discharge monitoring and control system is occur.

(5) For ships of 4,000 tons gross tonnage or above, any discharge of oil mixture is to be automatically stopped when alarm devices are actuated.

(6) A manually operated alternative method is to be provided and may be used in the event of failure of oil discharge monitoring and control system.

7 Effective oil/water interface detectors considered to be appropriate by VR are to be provided for an effective determination of the oil/water interface in slop tanks and in other tanks from which slops and effluent are directly discharged into the sea.

8 The ship is to be provided with an operation manual for the oil discharge monitoring and control system for ballast. The manual is to be approved by VR.

9 The requirements in the preceding 3.3.1-3 to 3.3.1-8 do not apply to oil tankers carrying asphalt or other refined petroleum products falling under the requirements of this Part of the Rules, but the separation of water and such products is hard due to their physical properties. In this case, the oil tankers are to be provided with the arrangement for the retention of oily mixtures for subsequent discharge to reception facilities.

10 For any oil tanker which engages exclusively on voyages within 50 nautical miles from the territorial base line of a state, the requirements in the preceding 3.3.1-6 to 3.3.1-8 do not apply, provided that VR can afford such relaxation in consideration of the operating plan of the ship.

3.3.2 Discharge arrangements

1 In every oil tanker, discharge manifolds for connection to reception facilities for the discharge of dirty ballast water or oil contaminated water are to be located on the open deck on both sides of the ship.

2 In every oil tanker, pipelines for the discharge to the sea of ballast water or water contaminated by oil in cargo tank spaces are to be led to the open deck or to the ship's side above the waterline in the deepest ballast condition. However, the following cases are exempted: (1) The pipelines for the discharge of segregated ballast and clean ballast where means are provided for

inspecting the surface of the ballast water immediately before discharging, and discharge is made within in-port areas or offshore mooring systems, or discharged at sea only by gravitation.

(2)The pipelines for the discharge of segregated ballast and clean ballast where oil/water interface detectors capable of inspecting the ballast water immediately before being discharged as specified in 3.3.1-7 are provided, and discharged at sea only by gravitation. Even in this case, however, pipelines for the discharge from slop tanks are to be led to the open deck or to the ship's side above the waterline in the deepest ballast condition.

3 Means are to be provided for stopping the discharge of effluent into the sea from a position on upper deck or above located so that the manifold in use referred to in the preceding 3.3.2-1 and the effluent from the pipeline referred to in the preceding 3.3.2-2 may be visually observed. Means for stopping the discharge need not be provided at the observation position if a positive communication system such as telephone or radio system is provided between the observation position and the discharge control position.

4 In addition to those specified in preceding 3.3.2-1 to 3.3.2-3 above, crude oil tankers of 20,000 tons deadweight and above and products carriers of 30,000 tons deadweight and above are to be provided with the following discharge arrangements specified in (1) and (2): (1) Cargo oil pipelines are to be arranged so that the quantity of oil residue in the pipeline is minimized. (2) Means are to be provided so that the oil residues in the cargo pumps and cargo oil pipelines after cargo

discharging can be drained or removed by connecting they with stripping lines or other effective means. For the oil residues, the special small diameter pipelines are to be provided outboard the shore transfer manifold for transferring them to the cargo oil tanks or slop tanks, as well as to shore reception facilities. The cross-sectional area of the small diameter pipelines are not to exceed 10% of that of the main cargo discharge line.


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3.4 Crude oil washing system 3.4.1 Requirements for installation

Crude oil tankers of 20,000 tons deadweight and over are to be provided with the following:

(1) Crude oil washing system meeting the requirements in 3.4 (2) The inert gas system meeting the requirements of the Rules for the Classification and Construction of Sea-

going Steel Ships for all cargo oil tanks and slop tanks. (3) A procedures and arrangements manual describing the crude oil washing system in detail and specifying

the handling procedure, which is approved by VR. 3.4.2 Piping arrangements for crude oil washing system

The piping arrangements for crude oil washing system are to meet the following requirements (1) through (9):

(1) The crude oil washing pipes and valves included in the supply piping system are to be made of steel or equivalent material, having a sufficient strength for the maximum working pressure, and to be connected and supported adequately.

(2) The pipelines for the crude oil washing arrangement are to be permanent and independent from the fire main or other piping arrangements than the crude oil washing line. However, part of the cargo oil pipelines of the ship may be used in common with the crude oil washing line, where approved by VR. For combination carriers carrying non-liquid cargo, the crude oil washing pipelines may be made detachable as necessary, but when reused, they are to be fitted properly to a satisfactory oiltightness. Where it is necessary to provide a tank washing machine in the tank hatch cover, a flexible hose is to be used for connecting the crude washing system with the tank washing machine. The flexible hose is to be of the flange type at joints, which is approved by VR. The length of the hose is not to exceed the length necessary for direct connection of the tank washing machine at a close position outside the hatch coaming. A storage area is to be provided for these flexible hoses when they are not in use.

(3) Tank washing supply pipelines are to be provided with a means to prevent overpressure. The oil overflows through the safety device provided for preventing overpressure is to be led to the suction side of the supply pump.

(4) Where the tank washing system is fitted with a water supply valve for water washing, the valve is to have sufficient strength, and if ingress of the crude oil into the washing system is likely, means are to be provided to shut-off the connected part by applying a blind flange.

(5) Where the piping arrangement is fitted with pressure gauges or other instruments, a stop valve is to be provided near such instruments or the instruments are to be of the enclosed design.

(6) No part of the crude oil washing system is to be located within the machinery space. Where steam heaters are provided for the tank washing system, these heaters are to be effectively shut off with a double stop valve or a readily identifiable blind flange.

(7) Where supply pipelines serving in common with crude oil and water washing are provided, such pipelines are to be designed so that they can be drained of oil into slop tanks or other cargo spaces before starting water washing as far as practicable.

(8) The pipelines are to have pipe diameters sufficient for simultaneous operations of the maximum number of tank washing machines at the design pressure and discharge rate specified in the operations and equipment manual. The pipelines are to be arranged so that necessary number of tank washing machines needed for individual cargo spaces can be operated simultaneously.

(9) The crude oil washing supply pipelines are to be secured to the hull at adequate locations, and means are to be provided to allow thermal expansions and free movements according to the deflections of the hull structure. The securing method of the supply pipelines is to be such that the hydrodynamic impacts can be absorbed without displacing the pipelines to any appreciable extent. The securing positions of the pipelines are to be remotest from the supply position of crude oil to the pipelines. Where a tank washing machine is used for securing the branch pipe end, special means are to be provided for securing that portion of the pipelines when the tank washing machine is removed.


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3.4.3 Crude oil washing machines

Crude oil washing machines are to meet the following requirements (1) through (7):

(1) Tank washing machines for crude oil washing are to be installed permanently, and to be of a design considered to be appropriate by VR.

(2) The performance characteristics of tank washing machines are to be determined by the nozzle diameter, operating pressure, operating mode and period. Individual tank washing machines are to have such performance characteristics that are sufficient to effectively wash the cargo tanks served by these washing machines within the period specified by the operations and equipment manual.

(3) Tank washing machines are to be installed in individual cargo tanks, and the supporting method is to satisfy VR. Where tank washing machines are installed at remarkably lower positions below the deck due to reasons of structural projections in the tank, consideration is to be given for providing special supports for the tank washing machines and supply pipelines.

(4) Individual tank washing machines are to be capable of being shut off by the stop valve fitted to the supply pipeline. Where a deck-mount tank washing machine is removed for some reasons, means are to be provided to blank off the oil supply pipeline led to that machine while the machine is kept removed. Similarly, an adequate means to close the tank opening with a metal sheet or suitable other means approved by VR is to be provided.

(5) Where a driving unit is not incorporated into the tank washing machine, a sufficient number of tank washing machines are to be provided so that any tank washing machine needs not be transferred from the original position of installation for three or more times during the tank washing operation for achieving the tank washing programme specified in the operations and equipment manual.

(6) The number and locations of tank washing machines are to be such as will ensure that all the vertical surfaces and all the horizontal surfaces can be washed by direct injections, or effective tank washing can be done by reflections of injection. For evaluating the effectiveness of reflected injections, special attention is to be paid to the washing of the upper horizontal surfaces, and to use the following parameters: (a) For the horizontal surface of tank bottom and the upper surface of large principal structural hull

members such as longitudinals in tanks, the sum of the areas that the direct injection is interfered with decks, bottom longitudinals, main girders, longitudinals or similar other large structural hull members is not to exceed 10% of the total sum of areas of the horizontal surface of the tank bottom, and the upper surfaces of longitudinals and other large main structural hull members.

(b) For the vertical surfaces of tank side walls, the sum of the areas that the direct injection is interfered with decks, bottom longitudinals, main girders and longitudinals, or similar large main structural hull members is not exceed 15% of the total sum of the areas of the tank side walls. It is necessary to consider to provide two or more types of tank washing machines to achieve sufficient tank washing results though it depends on the arrangement of structural members in the tank.

(7) The design of deck-mounted tank washing machines is to be such that means are provided to display the rotational speed and arcing motions of the machine outside the cargo tank.

3.4.4 Pumps for crude oil washing system

Pumps supplying crude oil to tank washing machines are to meet the following requirements (1) through (5):

(1) Pumps supplying crude oil to tank washing machines are to be either the cargo oil pumps or those specially provided for the purpose.

(2) The pump capacity is to be such that the maximum number of tank washing machines specified in the operations and equipment manual can be operated at the specified pressure with a sufficient rate of discharge. Where eductors are provided for stripping, the pump is to be capable of supplying the eductor-driving fluid sufficient to meet the requirements in 3.4.5(2).

(3) The capacity of the pump is to be such that the requirement specified in (2) can be met even if one pump fails. The pump and piping arrangements are to be such that the crude oil washing system functions effectively even in the event of failure of one pump.

(4) The system is to be capable of carrying out crude oil washing of tanks even when two or more types of different cargoes are carried.


52

(5) Means are to be provided so that the washing machine can maintain a sufficient pressure according to (2) for effectively carrying out crude oil washing even in the event that the back pressure generated at shore reception facilities is lower than that required for crude washing. Even in the event of failure of one pump, this requirement is to be met. The minimum supply pressure required for crude oil washing is to be specified in the operations and equipment manual.

3.4.5 Stripping system

The stripping system is to meet the following requirements (1) through (7):

(1) The design of all systems to strip crude oil from the bottom of cargo oil tanks is to satisfy VR. (2) The design and capacity of the stripping system are to be such that no oil and residues are left stacking on

the bottom of the tank when the tank washing is completed. (3) The capacity of the stripping system is to be such that 1.25 times the total amount of discharge by all tank

washing machines simultaneously operated can be dealt with when tank washing is carried out on the bottom of the cargo tanks specified in the operations and equipment manual.

(4) To check if the bottom of the cargo tank is dry after crude oil washing, means such as liquid level gauges, hand sounding devices, performance meter for stripping systems referred to in (6) are to be provided. Where no effective means approved to confirm that the bottom of the cargo tank is dry are provided, means are to be provided for hand sounding at three locations including the aftermost part of the cargo tank and suitable other places. The term "dry" used here means that even the area in the vicinity of the suction opening of stripping bears a small amount of oil, other areas are generally in dry condition.

(5) For stripping oil from cargo oil tanks, displacement type pumps, selfpriming type centrifugal pumps, eductors or others satisfying VR are to be used. Where stripping pipelines are connected to many tanks, means are to be provided to shut-off individually those tanks which cannot be stripped.

(6) A monitoring system that monitors the effect of the stripping system is to be provided. The monitors are to be located in the cargo control room, safe, accessible and convenient places for watch-standing officers, and can be read off by remote indications. Where stripping pumps are provided, either a flow meter, stroke meter, or tachometer is to be provided as a monitoring device, and a pressure gauge or equivalent alternative device is to be fitted at the discharge connection of the pump. Where eductors are provided, pressure gauges at the suction and discharge connections of the eductor-driving fluid, and a compound gauge at the suction connection of the eductor are to be fitted as a monitor.

(7) The internal structure of tank is to be such that the oil drain of the stripping system to the tank suction meets the requirements of (2) and (4).

3.4.6 Ballast tank arrangement

Where no independent ballast tanks are provided for ballasting cargo tanks, means are to be provided to drain oil safely and effectively from the pump manifold and pipelines for ballasting, before ballasting is started.


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Chapter 4 TRANSITIONAL REQUIREMENTS 4.1 General 4.1.1 Application

1 The requirements in this chapter apply to construction and equipment for the prevention of pollution by oil from ships whose keel was laid before 25 August 1983, which are registered or intended to be registered in VR, unless otherwise specified in the following of -3.

2 The ships falling under the requirements of this chapter are to comply with the requirements of Chapter 1, Chapter 2 and Chapter 3 as well in accordance with Table 3-9.

3 Crude oil tankers of 5,000 tons deadweight and above, which were constructed, the keel of which were laid, or which were delivered before the dates specified in 3.1.1-2 are to comply with the requirements of 4.3.10. However, this requirements need not apply to the following oil tankers.

(1) Oil tankers comply with the requirements specified in 3.2.4

(2) Oil tankers comply with the requirements specified in 3.2.4(1)(a) i) and ii) or 3.2.4(1)(b) i), ii) and iii) or 3.2.4(1)(c). In that event, the side protection distances and bottom protection distances are to comply with the requirement in 2.6.1(2), TCVN 6259-8E: 2003 and 3.2.3(2)(c) ii) respectively.

4.1.2 Definitions

For the purpose of this chapter, the following definitions are applied:

(1) Ships other than oil tankers (a) " N ship" means a ship to which either of the following (i) to (iii) falls under:

(i) for which the building contract is placed after 31 December 1975, or in the absence of a building contract the keel of which is laid after 30 June 1976; or

(ii) the delivery of which is after 31 December 1979; or (iii) which has undergone a major conversion by either one of the following:

1)for which the contract for conversion is placed after 31 December 1975; or 2)in the absence of a contract, the conversion work of which is begun after 30 June 1976; or 3)which is completed after 31 December 1979.

(b)" E ship" means a ship which is not an N ship. (2) Oil tankers

(a)" NN ship" means a ship to which either of the following (i) to (iii) falls under: (i)for which the building contract is placed after 1 June 1979, or in the absence of a building contract

the keel of which is laid after 1 January 1980 (ii)the delivery of which is after 1 June 1982 (iii)which has undergone a major conversion:

1)for which the contract for conversion is placed after 1 June 1982; or 2)in the absence of a contract, the conversion work of which is begun after 1 January 1980; or 3)which is completed after 1 June 1982.

(b)" EN ship" means a ship to which either of the following i) through iv) falls under: (i)for which the building contract is placed between 31 December 1975 and 1 June 1979, or (ii)in the absence of a building contract the keel of which is laid between 30 June 1976 and 1 January

1980, or (iii)the delivery of which is between 31 December 1979 and 1 June 1982, or (iv)which has undergone a major conversion:

1)for which the contract for conversion is placed between 31 December 1975 and 1 June 1979; or 2)in the absence of a contract, the conversion work of which is begun between 30 June 1976 and 1

January 1980; or 3)which is completed between 31 December 1979 and 1 June 1982.


54

(c)" EE ship" means a ship other than NN ship or EN ship. (3) "New ship" means an N ship, NN ship and EN ship. (4) "Existing ship" means an E ship and EE ship.

Table 3-9 Applicability of the requirements in Chapter 1, Chapter 2, and Chapter 3 to ships defined by 4.1.1-1

×: Applied; :Not applied; ⎯ Outside the scope of application

Ships other than

oil tankers Oil tanker

N ship E ship NN ship EN ship EE ship

1.1.1 × × × × × Chapter 1 1.1.2 × × General 1.1.3-1

-2 -3

× × ×

×

× × ×

× ×

× ×

2.2.1-1 -2

× ⎯

× ⎯

× ⎯

× ⎯

× ⎯

Chapter 2 2.2.2 × × × 2.2.3 × × × × × 2.3.1 × × × × × 2.3.2 × × × 2.3.3 × × × 2.4.1 × × × × ×

Equipment for the prevention of pollution by oil from machinery spaces

2.4.2 × × × × × 3.2.1 ⎯ ⎯ × × ×

3.2.2-1 -2 -3 -4 -5

⎯ ⎯ ⎯ ⎯ ⎯

⎯ ⎯ ⎯ ⎯ ⎯

× ×

× (Note 1) × ×

× ×

× (Note 1) × ×

3.2.3 ⎯ ⎯ × × (Note 3) 3.3.1 ⎯ ⎯ × × × 3.3.2-1 -2 3 -4(1) -4(2)

⎯ ⎯ ⎯ ⎯ ⎯

⎯ ⎯ ⎯ ⎯ ⎯

× × × × ×

× × ×

× (Note 4)

× ×

× (Note 4)

3.4.1 ⎯ ⎯ × (Note 2) (Note 2) 3.4.2 ⎯ ⎯ × × × 3.4.3 ⎯ ⎯ × × × 3.4.4 ⎯ ⎯ × × × 3.4.5 ⎯ ⎯ × × ×

Chapter 3 Construction and equipment for the prevention of pollution by oil carried in bulk

3.4.6 ⎯ ⎯ × × × (Note 1) This does not apply to 3.2.2-3(3). (Note 2) This applies to 3.4.1(3). (Note 3) This does not apply to oil tankers of less than 70,000 tons deadweight. (Note 4) This applies to crude oil tankers of 40,000 tons deadweight and above.


55

(5) (a)"Major conversion" means a conversion falls under one of the following (i) to (iv) (i) which substantially alters the dimensions or carrying capacity of the ship; or (ii) which changes the type of the ship; or (iii) the intent of which in the opinion of VR is substantially to prolong its life; or (iv) which otherwise so alters the ship that if it were a new ship, it would become subject to relevant

requirements of Part 1 of the Rules not applicable to it as an existing ship (b) Notwithstanding the requirements in (a) above, conversions for EE ships of 20,000 tons deadweight

and over to make them comply with the requirements of 3.2.3 and 3.4.1 are not to be considered as a major conversion.

(6) “ Heavy diesel oil” means marine diesel oil other than those distillates of which more than 50% by volume distils at a temperature not exceeding 340oC when tested by the method acceptable to VR.

(7) “Fuel oil” means heavy distillates or residues from crude oil or blends of such materials intended for use as a fuel for the production of heat or power of a quality equivalent to the specification acceptable to VR.

(8) “Category 1 oil tanker” means an oil tanker of 20,000 tons deadweight and above carrying crude oil, fuel oil, heavy diesel oil or lubricating oil as cargo, and of 30,000 tons deadweight and above carrying oil other than the above, which does not comply with the requirements for NN ships.

(9) “ Category 2 oil tanker” means an oil tanker of 20,000 tons deadweight and above carrying crude oil, fuel oil, heavy diesel oil or lubricating oil as cargo, and of 30,000 tons deadweight and above carrying oil other than the above, which complies with the requirements for NN ships. However, the oil tanker of 20,000 tons deadweight and above but less than 30,000 tons deadweight, which complied with the requirements specified in 3.2.3(1) and 3.2.3(2), is defined as “ Category 2 oil tanker” and which not complied with the requirements specified in 3.2.3(1) and 3.2.3(2) is defined as “ Category 1 oil tanker”.

(10) “ Category 3 oil tanker” means an oil tanker of 5,000 tons deadweight and above but less than that specified in above (8) and (9).

4.2 General requirements 4.2.1 Arrangements of forepeak

The requirements of 1.1.3-1 apply to ships for which the building contract is placed after 1 January 1982, or in the absence of the building contract the keel of which is laid after 1 July 1982 among ships of 400 tons gross tonnage and over, N ships, EN ships and NN ships.

4.2.2 Storage and discharge of oil residues (sludge)

The requirements of 2.2.2 apply to N ships, NN ships and EN ships. 4.2.3 Oil discharge monitoring and control system and oily-water separating system for bilge

The requirements of 2.3.3 also apply to E ships and EE ships. However, stopping of discharge may be carried out manually.

4.3 Equipment for the prevention of pollution by oil carried in bulk by oil tankers 4.3.1 Arrangements of bulkheads in spaces carrying cargo oil

The requirements of 3.2.1(3) to (6) apply to EE ships which belong to either the following (1) or (2), and these ships are to become satisfying the requirements before 2 October 1985.

(1) Tankers the delivery of which is before 1 January 1977 (2) Tankers to which both of the following conditions are applicable:

(a)the delivery of which is before 1 January 1977, and


56

(b)the building contract for which is placed after 1 January 1974. In the absence of an advance building contract the keel of which is laid after 30 June 1974.

4.3.2 Subdivisions and stability

The following requirements are to apply to NN ships and EN ships instead of the requirements of 3.2.2-3(3). The stability in the final stage of flooding is to be investigated by VR and may be regarded as sufficient if the righting lever curve has at least a range of 20 degrees beyond the position of equilibrium in association with a maximum residual righting lever of at least 0.1 m. VR is to give consideration to the potential hazard presented by protected or unprotected openings which may become temporarily immersed within the range of residual stability.

4.3.3 Segregated ballast tanks

1 Under the conditions to comply with the requirements of 4.3.3-2 and 4.3.3-3, all EN ships and EE ships of crude oil tankers of 40,000 tons deadweight and over are to be provided with segregated ballast tanks meeting the requirements of 3.2.3(1). However, the requirements of 3.2.3 apply to crude oil tankers of EN ships of 70,000 tons deadweight and above.

2 Except for ships that are intended to carry crude oil which does not fit to crude oil washing, the crude oil washing system meeting the requirements of 3.4 may be provided instead of providing segregated ballast tanks.

3 For crude oil tankers of 40,000 tons deadweight and above but not exceeding 70,000 tons deadweight, clean ballast tanks meeting the requirements of 4.3.4 may be provided instead of providing segregated ballast tanks or crude oil washing machines before 2 October 1987.

4 Product carriers of EN ships and EE ships of 40,000 tons deadweight and above are to be provided with segregated ballast tanks meeting the requirements of 3.2.3(1), or alternatively, clean ballast tanks meeting the requirements of 4.3.4. However, the requirements of 3.2.3 apply to product carriers of EN ships of 70,000 tons deadweight and above.

4.3.4 Requirements for oil tankers provided with clean ballast tanks

1 Clean ballast tanks under the requirements of 4.3.3-3 or 4.3.3-4 have sufficient capacities corresponding to segregated ballast tanks specified in 3.2.3, and therefore they are to be used exclusively for carrying clean ballast water.

2 The arrangements and operating methods of clean ballast tanks are to meet the conditions as deemed appropriate by VR.

3 Oil tankers operated with the provisions of clean ballast tanks are to be provided with oil content meters approved by VR so that the oil content of ballast water being discharged can be monitored.

4 All oil tankers operated with the provisions of clean ballast tanks are to be provided with a clean ballast tank operations manual giving detailed explanations on the procedures and arrangements. This manual is to be approved by VR and to contain all information in the specifications referred to in the preceding 4.3.3-2.

4.3.5 Oil tankers engaged in specific trades

Even in EN ships or EE ships of 40,000 tons deadweight and above, where they are operated with the limited trade areas approved by VR, and are provided with tanks for the retention of all ballast water and tank washings including clean ballast water, the requirements of 4.3.3 do not apply.

4.3.6 Oil tankers carrying special ballast


57

Where deemed appropriate by VR, EN ships and EE ships constructed to comply with the minimum draughts and trim conditions specified in 3.2.3(1) without using ballast water may be regarded as those meeting the requirements of segregated ballast tanks specified in 4.3.3.

4.3.7 Arrangements for the retention of oil on board

1 For EE ships, the term "1/30,000" in applying the requirements of 3.3.1-6(4) may be construed as "1/15,000."

2 For EE ships and EN ships of 40,000 tons deadweight and above, the requirements in 3.3.1-6 to 3.3.1-8 do not apply, provided that VR so approves by taking into account their trade areas.

4.3.8 Discharge arrangements

Although the requirements of 3.3.2-2 apply to EN ships and EE ships, the pipelines for discharge into the sea may be led to below the waterline when the following (1) or (2) is applicable:

(1) Oil tankers operated with the provisions of clean ballast tanks, which cannot discharge ballast water from the clean ballast tanks at the position above the waterline without modifications, and are provided with oil content meters specified in 4.3.4-3; or

(2) Where dirty ballast or oil contaminated water generated in the cargo tank space is led through permanent piping to such a position that part of the flow can be readily observed visually on the upper deck or other accessible position higher than the above. However, such a part flow indicating device is to be approved by VR for the specification covering the design, installation and operation as a part flow system for overboard discharge monitoring.

4.3.9 Cargo oil piping arrangements

EN ships or EE ships which are required to be provided with segregated ballast tanks, a crude oil washing system, or to be operated with the provisions of clean ballast tanks are to meet the requirements of 3.3.2-4(2). However, those ships already provided with pipelines in smaller pipe diameter, the required pipe diameter may be reduced to small diameter not exceeding 25% of the sectional area of the cargo oil discharge main.

4.3.10 Prevention of oil pollution in the event of collision or stranding

1 An oil tanker is to comply with the requirements specified in 3.2.4 not later than the anniversary of the date of delivery of the ship in the year specified in table 3-10.

2 The VR may allow continued operation of a Category 1 oil tanker beyond the date of delivery of the ship in 2005, and of a Category 2 oil tanker beyond the anniversary of the date of delivery of the ship in 2010, subject to the approval by VR.

3 A Category 1 oil tanker of 25 years and over after the date of its delivery is to comply with the following requirements (1) or (2) .

(1) Wing tanks or double bottom spaces, not used for the carriage of oil and meeting the width and height requirements of 3.2.3(2)(c)ii), are to cover at least 30% of Lt for the hull depth of the ship on each side or at least 30% of the projected bottom shell area within the legth Lt , where Lt is as defined in 3.2.3(2)(a).

(2) The tanker is to be operated with hydrostatically balanced loading, taking into account the guidelines.

4 In addition to the provision of -2 above, VR may allow continued operation of such a ship beyond the date specified in -1 above, subject to the approval by VR.


58

Table 3-10 Application Date of Oil tankers

Category of oil tanker Year

Category 1 oil tanker 2003 for ships delivered in 1973 or earlier

2004 for ships delivered in 1974 and 1975


2006* for ships delivered in 1978,1979 and 1980

2007* for ships delivered in 1981 or later

Category 2 oil tankers 2003 for ships delivered in 1973 or earlier





2008 for ships delivered in 1982



2011* for ships delivered in 1985




2015* for ships delivered in 1989 or later

Category 3 oil tanker 2003 for ships delivered in 1973 or earlier








2011 for ships delivered in1985




2015 for ships delivered in 1989 Note: * Subject to comliance with the provisions 4.3.10-2


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Part 4 CONSTRUCTION AND EQUIPMENT FOR THE PREVENTION OF POLLUTION BY DISCHARGES OF NOXIOUS LIQUID SUBSTANCES IN BULK


The requirements of this chapter apply to construction and equipment for the prevention of pollution by noxious liquid substances in bulk.

1.2 Definitions 1.2.1 Terminology

For the purpose of this Part, the following definitions apply:

(1) "New ship" means a ship carrying noxious liquid substances in bulk of which keel is laid after 1 July 1986.

(2) "Ship carrying noxious liquid substances in bulk have been constructed" means a ship of which keel is laid or is at a similar stage of construction. Any ship converted into a ship carrying noxious liquid substances in bulk is to be dealt with as the ship carrying noxious liquid substances in bulk on the date when the conversion work is begun irrespective of the date of construction. The requirements relevant to the date of conversion do not apply to the conversion of any ship meeting all of the following requirements: (a) that the ship is constructed before 1 July 1986; or (b) that the ship is certified by the Bulk Chemical Code that it carries only the substances expressly

prescribed in the Code as those involving marine pollution. (3) "A similar stage of construction" means the following stages:

(a) a stage at which the construction work is begun to the extent identifiable as a special ship, and (b) 50 tons of steel or 1% of the total estimated weight of steel, whichever is less is assembled for the

construction of the ship. (4) "Existing ship" means a ship carrying noxious liquid substance in bulk other than new ships. (5) "Clean ballast" means, where discharge is made in waters outside the special areas, the ballast loaded in a

tank which, since it was last used to carry a noxious liquid substance, has been treated in accordance with the one of the requirements of the following (a) through (e) depending upon the kind of noxious liquid substances and has been emptied. Where discharge is made in the special areas, it means a ballast specified separately by VR. (a) Where a substance in Category A is carried: to prewash or wash with cargo content confirmed and

discharge the tank washings to shore reception facilities; to carry out additional washing and discharge the residue/water mixture resulting therefrom.

(b) Where a high viscosity or solidifying substance in Category B or C is carried; to prewash and discharge the tank washings to shore reception facilities; to carry out additional washing and discharge the residue/water mixture resulting therefrom.

(c) Where a low viscosity or non-solidifying substance in Category B or C is carried: prewash after confirming that the amount of residues resulting from stripping becomes the specified value or less, and to discharge the residue/water mixture resulting therefrom.

(d) Where a substance in Category D is carried: discharge the ballast after diluting the ballast water ten times.

(e) Remove the residues by ventilated washing.


60

(6) "Special area" means a sea area where for recognized technical reasons in relation to its oceanographic and ecological condition and to its peculiar transportation traffic the adoption of special mandatory methods for the prevention of sea pollution by noxious liquid substances is required. Special areas are to be: (a) The Baltic Sea Area, and (b) The Black Sea Area. (c) The Antarctic Area

(7) "Bulk Chemical Code" means the Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk adopted by the Marine Environmental Protection Committee of IMO as a resolution MEPC. 20(22), and was adopted in accordance with the procedure prescribed in Article 16 Amendments (an amendment to an Appendix to an Annex to the Convention) including valid amendments to the Code.

(8) "Residue/water mixture" means the residues to which water has been added for any purpose (e.g. tank cleaning, ballasting, bilge slop).

(9) "Solving" means to solve in water at any rate at the temperature of tank washing water. (10)"Associated pipeline" means the cargo discharge pipeline between the suction point in cargo tanks and the

junction with the shore connection used for discharging cargo (including pumps and strainers), and other pipelines (including pumps and strainers) connected and open to the cargo discharge pipeline when discharging cargo.

(11)"Solidifying substance" means, for noxious liquid substance with a melting point lower than 15oC, a substance whose temperature at cargo unloading is higher by less than 5 oC than its own melting point; and for noxious liquid substance with a melting point of 15 oC, or more, a substance whose temperature at cargo unloading is higher by less than 10 oC than its own melting point.

(12)"Non-solidifying substance" means a noxious liquid substance other than solidifying substances. (13)"High viscosity substance" means, for noxious liquid substances in Category B and noxious liquid

substances in Category C which are unloaded in special areas, a substance whose viscosity at cargo unloading is 25 mPa.s or more, and for noxious liquid substances in Category C which are unloaded outside special areas, a substance whose viscosity at cargo unloading is 60 mPa.s or more.

(14)"Low viscosity substance" means a noxious liquid substance other than high viscosity substances. (15)"Category A noxious liquid substances" (hereinafter referred to as "Category A substances" in this Part)

are substances, which are bioaccumulated and liable to produce a hazard to aquatic life or human health, listed in Table 4-1(1) as Category A substances.

(16)"Category B noxious liquid substances" (hereinafter referred to as "Category B substances" in this Part) are substances, which are bioaccumulated with a short retention of the order of one week or less, listed in Table 4-1(2) as Category B substances.

(17)"Category C noxious liquid substances" (hereinafter referred to as "Category C substance" in this Part) are substances, which are slightly toxic to aquatic life, listed in Table 4.1(3) as Category C substances.

(18)"Category D noxious liquid substances" (hereinafter referred to as "Category D substances" in this Part) are substances, which are practically non-toxic to aquatic life, listed in Table 4-1(4) as Category D substances.

(19)"Oil-like substances" are substances of Category C substances and Category D substances having an oil-like properties, listed in Table 4-2(1) and (2) and provisionally assessed by IMO as oil-like substances.


61

Table 4-1(1) List of category A noxious liquid substances

Category A substances, ect. Residual concentration in percent weight

1. Category A substances I Outside

special area

II Within

special area Ethyl acrylate 0.1 0.05 Decyl acrylate 0.1 0.05 Acetone cyanohydrin 0.1 0.05 o - Ethylphenol 0.1 0.05 Chlorinated paraffins (C10- C13) 0.1 0.05 Drilling brines, containing zinc salts 0.1 0.05 Creasote (coal tar), Creosote (wood) 0.1 0.05 Cresol (al isomers) 0.1 0.05 Cresylic acid, sodium salt solution 0.1 0.05 Chlorotoluene (mixed isomers) 0.1 0.05 0-Chlorotoluene 0.1 0.05 Coal tar 0.1 0.05 Alcahol (C6- C17) (secondery) poly (3-6) ethoxylate 0.1 0.05 Alcahol (C12- C15) poly (1-3) ethoxylate Alcahol (C12- C15) poly (3 - 11) ethoxylate

0.1 0.05

Octyl Nitrates (all isomers) 0.1 0.05 Diisopropylbenzene (all isomers) 0.1 0.05 2,4 - Dichlorophenol 0.1 0.05 2,4 - Dichlorophenoxyacetic acid diethanolamine salt solution 0.1 0.05 2,4 - Dichlorophenoxyacetic acid dimethylamine salt solution (70% or less) 0.1 0.05 2,4 - Dichlorophenoxyacetic acid triisopropanolamine salt solution 0.1 0.05 Motor fuel anti-knock compounds 0.1 0.05 Diphenyl 0.1 0.05 Diphenyl /Diphenyl ether mixture 0.1 0.05 Diphenyl ether 0.1 0.05 Diphenyl ether /Diphenyl phenyl ether mixture 0.1 0.05 Carbolic oil 0.1 0.05 Triethylbenzene 0.1 0.05 Dodecyl phenol 0.1 0.05 Naphthalene (molten) 0.1 0.05 Naphthenic acids 0.1 0.05 Calcium naphthenate in mineral oil 0.1 0.05 Cobalt naphthenate in solvent naphtha 0.1 0.05 Nonylphenol 0.1 0.05

Phosphorous, yellow or white 0.1 0.05

Vinyltoluene 0.1 0.05


62

Table 4.1(1) List of category A noxious liquid substances (cont'd.)

Category A substances, ect.

Residual concentration in percent weight

1. Category A substances I Outside special

area

II Within

special area Dibutyl phthalate 0.1 0.05

Butyl benzyl phthalate 0.1 0.05

Butylbenzene (all isomers) 0.1 0.05

Metam sodium solution 0.1 0.05

Alpha - methylstyrene 0.1 0.05

Methylnaphthalene 0.1 0.05

Trixylyl phosphate 0.1 0.05

Tricresyl phosphate (containing less than 1 % ortho-isomer) 0.1 0.05

Tricresyl phosphate (containing 1 % or more ortho-isomer) 0.1 0.05

2. Substances provisionally assessed to be noxious to the same level as category A substances by the Administration

0.1* 0.05**

3. Mixtures of substances categorized in category A by MEPC/Circ.214. 0.1* 0.05**

Note: *: To be 0.01 if Phosphorous, yellow or white is contained. **: To be 0.005 if Phosphorous, yellow or white is contained.


63

Table 4-1(2) List of category B noxious liquid substances

Category B substances, etc. 1. Category B substances

Isobutyl acrylate 2- Ethylhexyl acrylate n- Butyl acrylate 2- Hydroxyethyl acrylate Methyl acrylate Acrylonitrile Sodium nitrite solution Di-n hexyl adipate Dimethyl adipate Allyl alcohol Isophorone diisocyanate Undecyl alcohol 1- Undecene Ethylidene norbornene Ethyltoluene 2- Ethyl-3 propylacrolein 2- Ethylthexylamine Allyl chloride Vinylidene chloride Benzyl chloride Octyl aldehyde Octane (all isomers) Olefin mixtures (C5- C15)

Alpha - Olefin (C5- C18) mixtures

Xylenol Isopropybenzene Crotonaldehyde m - Chlorotoluene p - Chlorotoluene n- Propyl chloride Chlorobenzene Chloroform Coal tar naphtha solvent Cyclohexyl acetate Hexyl acetate Heptyl acetate Methyl salicylate Carbon tetrachloride 1 - 3 - Cyclopentadiene dimer (molten) Cyclopentene Alcohol (C6- C17) (secondery) poly (7-12) Ethoxylate


64

Table 4-1(2) List of category B Noxious liquid substances (cont'd.)

Category B substances, etc.

1. Category B substances Camphor oil Calcium hypochlorite solution (more than 15%) Diisobutylene 1,1 Dichloroethane 1,1- Dichloropropane 1,2 - Dichloropropane 1,3 - Dichloropropane 1,3 - Dichloropropene Dichloropropene/Dichloropropane mixtures 1,6 - Dichlorohexane Dichlorobenzene (all isomers) Dinitrotoluene (molten) Diphenylmethane diisocyanate Ethylene dibromide Styrene monomer Sodium thiocyanate solution (56% or less) Tetrachloroethane Perchloroethylene Turpentine Decyl alcohol (all isomers) Decene Tall oil (crude and distilled) Glycidyl ester of C10 trialkylacetic acid 1, 1, 1- Trichloroethane 1,1,2- Trichloroethane Trichloroethylene 1,2,3- Trichloropropane 1,2,4- Trichlorobenzene 2,2,4- Trimethylhexamethylene diisocyante (2.2.4-and 2.2.4 isomers) Trimethyl benzenes (all isomers) Dodecyl alcohol Dodecyl diphenyl ether disulphonate solution Dodecene (all isomers) Ethylene dichloride Carbon disulphide o - Chloronitrobenzene o - Nitrophenol (molten) Nitrobenzene


65

Tables 4-1(2) List of category B Noxious liquid substances (cont'd.)

Category B substances, etc. 1. Category B substances

Vinyl neodecanoate Nonyl phenol poly (4-12) ethoxylates Nonene n - Butyraldehyde Dichloroethyl ether Diglycidyl ether cða bisphenol A Diphenylol propane - epichlorohydrin resins Diglycidyl ether cða bisphenol F Pinene Phenol Tall oil soap (disproportionated) solution Rosin soap (disproportionated) solution Diisobutyl phthalate Butene oligomer Propylene trimer Propylene tetramer Pentachloroethane White spirit, low (15-20%) aromatic Methacrylic resin in 1, 2-Dichloroethane solution Methacrylonitrile 2- Methyl -5-ethyl pyridine Methylcyclopentadiene dimer 2- Methylpyridine 4- Methylpyridine N-Methyl - 2 pyrrolidone Methyl heptyl ketone Mercaptobenzothiazol, sodium salt solution Lauric acid Lactonitrile solution (80% or less) Ammonium sulphide solution (45% or less) Sodium hydrosulphide/Ammonium sulphide solution Sodium hydrosulphide solution (45% or less) Sodium sulphide solution Diethyl sulphate Rosin Fumaric adduct of rosin, water dispersion

2. Substances provisionally assessed to be noxious to the same level as Category B substances by thuc hien Administration.

3. Mixtures of substances categorized in category B by MEPC/Circ. 214.


66

Table 4-1(3) List of category C noxious liquid substances

Category C substances, etc. 1. Category C substances

Alkyl acrylate - vinyl pyridine copolymer in toluene Acetaldehyde Aniline Isopropanolamine Sodium sulphite solution Calcium alkyl salicylate A xÏt Alkyl benzene sulphonic Alkyl benzene sulphonic, sodium salt solution Sodium aluminate solution Ammonia aqueous (28% or less) Isovaleraldehyde Isobutyradehyde Isoprene Isopropylamine Isopropylcyclohexance 2, 2, 4- Trimethyl-1, 3-pentanediol - 1-isobutyrate Ethylamine Ethylamine solutions (72% or less) Ethylcyclohexane N - Ethylbutylamine Ethylbenzen Ethyl amyl ketone Ethylene Chlorohydrin Ethylene glycol diacetate Ethylene glycol butyl ether acetate Ethylenediamine Epichlorohyrin Ferric chloride solution Octanol (all isomers) Octane (all isomers) Olefin mixtures(C5- C7)

Hydrogen peroxide solutions (over 8% but not over 60%) Hydrogen peroxide solutions (over 60% but not over 70%) Xylenes Chloroacetic acid (80% or less) Chlorosulphonic acid 2- or 3- Chloropropionic acid Dimethyl glutarate Amyl acetate, commercial

Aviation alkylate (C8 paraffins and iso - paraffins BTP 95 - 120oC)


67

Table 4-1(3) List of category C noxious liquid substances (cont'd.)


Dimethyl succinate Nitrating acid (mixture of sulphuric and nitric acids) Isobutyl acetate Isoamyl acetate 2- Ethoxyethyl acetate sec-Amyl acetate n-Butyl acetate n-Amyl acetate Vinyl acetate Benzyl acetate Methylamyl acetate 1,2- Butylene oxide Cyclohexanol Cyclohexane Cyclohexylamine Cycloheptane Cyclopentane p- Cymene Nitric acid (less than 70%) Nitric acid (70% or over) Urea/Ammomnium nitrate solution (containing aqua Ammonia) Ferric nitrate/Nitric acid solution Calcium hypochlorite solution (15% or less) Sodium hypochlorite solution (15% or less) Diisopropanolamine Diisopropylamine Diethylaminoethanol Diethylamine Diethybenzene Diethylene glycol methyl ether Di-n-propylamine Dibutylamine Diisobutylamine Dipentene Dimethylamine solution (45% or less) Dimethylamine solution (greater than 45% but not greater than 55%) Dimethylamine solution (greater than 45% but not greater than 65 %)


68



Dimethyl octanoic acid Neodecanoic acid N, N-Dimethylcyclohexylamine Sodium Dichromate solution (70% or less) Potassium hydroxide solution Sodium borohydride (15% or less)/Sodium hydroxide solution Ammonium thiocyanate (25% or less)/ Ammonium thiosulphate (20% or less) solution Ammonium thiosulphate solution(60% or less) Tetrahydronaphthalene 1, 2, 3, 5- Tetramethybenzene Tall oil fatty acid (resin acids less than 20%) Triethylamine 1, 1, 2-Trichloro - 1, 2, 2- Trifluoroethane Trimethylamine o-Toluidine Toluene Toluenediamine Toluene diisocyanate o- or p- Nitrotoluenes Nonyl alcolhol (all isomers) Nonane (all isomers) Undecanoic acid Decanoic acid n - Butyl ether n - Propanolamine n - Propylamine n - Propylbenzene Sulphuric acid, spent Oleum Palm nut oil fatty acid Paraldehyde 2, 2 - Dichloroisopropyl ether Vinyl ethyl ether 1-Phenyl - 1 xylyl ethane Diethyl phthalate Dimethyl phthalate


69



Furfural Furfuryl alcohol Butylamine (all isomers) Propionitrile Propylene dimer Hexamethyleneimine Haxemethylenediamine solution Hexane (all isomers) Heptanol (all isomers) Heptene (all isomers) Benzyl alcohol Benzene and mixtures having 10% benzene or more 1,3 - Pentadiene Pentane (all isomers) Formaldehyde solutions (45% or less) Polyethylene polyamines Polyferric sulphate solution Phthalic anhydride (molten) Propionic anhydride Methylamine solutions (42% or less) 2-Methyl-6-ethyl aniline Methylcyclohexane Methylamyl alcohol Methyl amyl ketone Coconut oil fatty acid Ethyl butyrate n - Butyl butyrate Sulphuric acid Di - (2 - Ethylhexyl) Phosphoric acid

2. Substances provisionally assessed to be noxious to the same level as Category C substances by thuc hien Administration.

3. Mixtures of substances categorized in category C by MEPC/Circ. 214.


70

Table 4-1(4) List of category D noxious liquid substances

Category D substances, etc. 1. Category D substances

Arcrylamide solution (50% or less) Acrylic acid Diisononyl adipate Di- (2 - ethylhexyl) adipate Adiponitrile Ethyl acetoacetate Methyl acetoacetate Linseed oil (Vegetable oil n.o.s) Aminoethyl ethanolamine N- Aminoethylpiperazin 2 - (2 - Aminoethoxy) ethanol 2 -Amino -2-Methyl-1-Propanol (90% or less) Sodium hydrogen sulphite solution (35% or less) Alkyl (C9 - C17) benzene, Decylbenzene Isopropyl ether Isophorone Isophoronediamine Ethanolamine N - Ethylcyclohexylamine Ethylene glycol Ethylene glycol methyl butyl ether Ethylene glycol acetate Ethylene glycol isopropyl ether Ethylene glycol phenyl ether / Diethylene glycol phenyl ether mixture Ethylene glycol methyl ether Ethylene glycol methyl ether acetate Ethylene cyanohydrin Ethylenediamine, tetraacetic acid, tetrasodium salt solution 2- Ethoxyethanol Aluminium chloride (30% or less)/ Hydrochloric (20% or less) solution Urea/Ammonium mono - and di-hydrogen phosphite / Potassium chloride solution Choline chloride solutions Benzene sulphonyl chloride Hydrochloric acid Octanoic acid (all isomers), 2-Etylhexanoic acid Olive oil (Vegetable oil n.o.s) Oleic acid Cashew nut shell oil (untreated) Epsilon - Caprolactam (molten or aqueous solutions)


71

Table 4-1(4) List of category D noxious liquid substances (cont'd.)


Pentanoic acid Formic acid Isobutyl formate Methyl formate fish oil (Animal and fÝh oils, n.o.s) Citric acid Chlorohydrins (crude) Glyoxal solution (40% or less) Glutaraldehyde solution (50% less) Sodium silicate solution Coal tar pitch (molten) Rice bran oil (Vegetable oil n.o.s) Sesame oil (Vegetable oil n.o.s) Acetic acid Ethyl acetate Sec-Butyl acetate n - Octyl acetate n - Propyl acetate 3 - Methoxybutyl acetate Safflower oil(Vegetable oi o.n.s) Ethylene oxide/Propylene oxide mixture with an Ethylene oxide content of not more than 30% in weight Propylene oxide Mesityl oxide Silicon tetrachloride Titanium tatrachloride Cyclohexanone Ammonium nitrate solution (93% or less) Urea/Ammonium nitrate solution (containing aqua ammonia) Diacetone alcohol Diisobutyl ketone Diisopropyl naphthalene Diethylene glycol dibbutyl ether Diethylene glycol ethyl ether acetate Diethylene glycol butyl ether acetate Diethylene glycol methyl ether acetate Diethylenetriamine 1,4 - Dioxane 2, 2 - Dichloropropionic acid Dichloromethane 1,4 -Dihydro-9, 10 -Dihydroxy anthrancene, disodium salt solution


72


Category D substances 1. Category D substances

Dipropyrene glycol methyl ether N.N -Dimenthylacetamide solution (40% or less) Dimethylethanomine 2,2- Diemethûpopane -1,3-diol Dimethylformamide Tallow Tallow fatty acid Calcium hydroxide slurry Sodium hydroxide solution Sulpholane Cod liver oil (Animal oil and fish oils n.o.s) Sodium carbonate solution Soya bean oil (Vegetable oil n.o.s) Tetraethylene pentamine Tetrahydrofuran Decahydronaphthalene Corn oil (Vegetable oil n.o.s) Tung oil (Vegetable oil n.o.s) Triethanolamine Triethylene glycol ethyl ether Trienthylenethertramine Tripropyrene glycol methyl ether Trimethylacetic acid Trimethylhexamehylene diamine (2,2,4-and v¡ 2,4,4-isomers) Trimethylol propane polyethoxylate Dodecenyl succinic acid, dipotassium salt solution Rape seed oil (vegetable oil n.o.s) Naphthalene sulphonic acid - formaldehyde copolymer, sodium salt solution Nitrilotriacetic acid, trisodium salt solution Nitroropropane (60%)/Nitroethane (40%) mixture 1- ho´c 2-Nitropropane Lactic acid Butyl lactate Urea/Ammonium phosphate solution Nonanoice (all isomers) n - Valeraldhyde Hexanoic acid


73



n - Heptanoic acid

Palm stearin

Palm nut oil (Vegetable oil n.o.s)

Palm oil ()

Palm oil fatty acid methyl ester

Ferric hydroxyethyl ethylenediamine triacetic acid, trisodium salt solution

N -(Hydroxyethyl) ethylenediamine triacetic acid, trisodium salt solution

Castor oil (Vegetable oil n.o.s)

Sunflower oil (Vegetable oil n.o.s)

Pyridine

Dialkyl (C7 - C13) phthalate

Diisodecyl phthalates

Dinonyl phthalate

Ditridecyl phthalate

Diundecyl phthalate

Butylene glycol

Gamma - Butyrolactone Brake fruid base mix: (poly (2- 8) alkylene (C2- C3) glycols/polyalkylene (C2 - C10) glycols monoalbyl (C1- C4) ethers and their borate esters)

Beta - Propiolactone

Propionaldehyde

Propoinic acid

Ethyl propionate

Propylene glycol monoalkyl ether

Propylene glycol ethyl ether

Propylene glycol methyl ether

Hexanol

Hexamethylenediamine adipate (50% in water)

Hexamethylenetetramine solutions

Pentaethylenehexamine

n -Amyl alcohol

Sec-Amyl alcohol

Amyl alcohol, primary

Isoamyl alcohol

Formamide

Polyalkylene glycol butyl ether

Polypropylene glycol


74



Plymethylene polyphenyl isocyanate Sperm oil (Animal and fish oils) Maleic anhydride Acetic anhydride Methacrylic acid Butyl/Decyl/Cetyl/Eicosyl methacrylate mixture Ethyl methacrylate Nonyl methacrylate monomer Butyl methactylate Methyl tert - butyl ether Methy butenol Methyl butyl ketone Methyl isobutyl ketone Methyl butynol Methyl propyl ketone Cottonseed oil (Vegetable oil n.o.s) Morpholine Coconut oil (Vegetable oil n.o.s) Coconut oil fatty acid methyl ester Methyl ester cða a xÏt b¾o d·u d÷a Butyric acid Groundnut oil (Vegetable oil n.o.s) Latex (ammonia inhibited) Aluminium sulphate solution Ammonium sulphate solution Phosphoric acid

2. Substances provisionally assessed to be noxious to the same level as category A substances by the Administration

3. Mixtures of substances categorized in category A by MEPC/Circ.214.


75

Table 4-1(5) List of liquefied gases substances

Liquefied Category of noxious liquid substances

Vinylidene chloride B Acetaldehyde C Isoprene C Isopropylamine C Ethylamine C Vinyl ethyl ether C Ethylene oxide/Propylene oxide mixture with an Ethylene oxide content of not more than 30% in weight

D

Propylene oxide D

B¨ng 4-2(1) List of category C oil-like substances

Category C substances

Aviation alkylate Cycloheptane Cyclohexane Cyclopentane P - Cymene Diethylbenzene Dipentene Ethylbenzene Ethylcyclohexane Heptene (all isomers) Hexane (all isomers) Hexene (all isomers) Isopropylcyclohexane Methylcyclohexan 2 - Methyl -1-pentene Nonane (all isomers) Olefin mixtures (C5 - C7)

Pentane (all isomers) Pentene (all isomers) 1 - Phenyl - 1-xylyl ethane Propylene dimer Tetrahydronaphthalene Toluene Xylenes

Table 4-2(2) List of category D oil like substances

Category D substances

Alkyl (C9- C17) benzenes

Diisopropyl naphthalene


76

Chapter 2 CONSTRUCTION AND EQUIPMENT OF NEW SHIPS 2.1 General 2.1.1 Application

The requirements of this chapter apply to new ships. 2.2 Requirements for installation of construction and equipment 2.2.1 Equipment for the prevention of discharge of noxious liquid substances

1 For new ships, equipment for the prevention of discharge of noxious liquid substances specified in Table 4-3 are to be provided according to the category and physical properties of the noxious liquid substance to be carried, and sea areas for discharge.

2 For ships intending to remove residues of a noxious liquid substance with a vapour pressure exceeding 5 kPa at 20oC by ventilation, ventilated tank washing system is to be provided in addition to the equipment specified in the preceding 2.2.1-1.

3 Notwithstanding the requirements of the preceding 2.2.1-1 and 2.2.1-2, the equipment for the prevention of discharge of noxious liquid substances required to be installed in ships complying with the requirements of the following (1) and (2) are segregated ballast tank, cargo heating system (limited to ships carrying Category B substances with a melting point of 15oC or more only), and arrangements for discharge to reception facilities.

(1) where it is intended to repeatedly carry in each tank only one of noxious liquid substances or compatible substance (this means one of noxious liquid substances requiring no tank cleaning for locading another substance which differs from the substance in question after its unloading).

(2) where it is intended to discharge the washings generated by the tank cleaning carried out only before repairs or drydocking of the ship to suitable reception facilities.

4 Notwithstanding the requirements in the preceding -1 to -3 above, the equipment for preventing discharge of noxious liquid substances to be provided in ships carrying noxious liquid substances of which vapour pressure exceeds 5 kPa at 20oC intending to remove the residues by ventilation are to be the ventilated washing system.

2.2.2 Special requirements for new ships carrying category A substances, category B substances or

category C substances

Ships carrying category A substances, category B substances or category C substances are to comply with the requirements in Part 8E of the Rules for the Classification and Construction of Sea-going Steel Ships. However, liquefied gas carriers in bulk complying with the requirements in Part 8D of the Rules for the Classification and Construction of Sea-going Steel Ships intending to carry noxious liquid substances shown in Table 4-1(5) may be exempted.

2.2.3 Special requirements for new ships carrying oil-like substances

Notwithstanding the requirements of 2.2.1 and 2.2.2, oil tankers carrying noxious liquid substances in bulk, which do not carry noxious liquid substances other than oil-like substances, intending to discharge the residues exclusively by using the equipment specified in Part 3 are to comply with the requirements of Table 4-4 according to the classification of the oil-like substances to carry.


77

Table 4-3 Equipment for the prevention of discharge of noxious liquid substances in new ships

Classification of

substances Category

A Category B Category C Category D

Sea area of discharge All areas Outside special area

Within special

area All areas All areas

Equipment

Physical properties

All

substances

High viscosity or solidifying property

Low viscosity or non solidifying property

All substances


Low viscosity or non solidifying property

All substances

Prewash system × (Note 1) × × (Note 2) × × × (Note 2) ⎯

Stripping system ⎯ × × ⎯

Discharge outlet below the waterline

× (Note 3) × (Note 3) × (Note 3) ⎯

Arrangements for discharge to reception facilities

× × (Note 4) × (Note 4) × (Note 4)

Dilute water filling system ⎯ ⎯ ⎯ ×

Cargo heating system ⎯ × (Note 5) ⎯ ⎯

(Remark) × : to be provided ⎯ : not required to be provided

(Notes) (1) Any ship which is capable of discharging the residue/water mixtures to a reception facility until the concentration of

the substance in the effluent is at or below the value specified in Table 4-1(1) and until the tank is empty, may be exempted from this requirement.

(2) Any ship which carries out preprocessing by exclusively using the stripping system for removing the residues to the extent that the residues from stripping is reduced to the value specified in Table 4-8 or less may be exempted from this requirement.

(3) Any ship which discharges only clean ballast may be exempted from this requirement. (4) Any ship which does not discharge unnecessary noxious liquid substances generated on board may be exempted. (5) Any ship carrying substances with a melting point lower than 15 oC may be exempted.


78

Table 4-4 Requirements for new ships carrying oil-like substances

Classification of substances Requirements for new ships

Of the requirements specified in Part 3, those applicable to product carriers are to be complied with.

Of the requirements specified in Chapter 2, Part 8E "Ships carrying dangerous chemicals in bulk" TCVN 6259-8: 2003, the requirements applicable to Type 3 ships are to be complied with.


The oil discharge monitoring and control equipment specified in 3.3.1-6, Part 3 is to be suitable for monitoring the oil-like substances to be carried.

Of the requirements specified in Part 3, those applicable to product carriers are to be complied with. Category D

substances The oil discharge monitoring and control equipment specified in 3.3.1-6, Part 3 is to be suitable for monitoring the oil-like substances to be carried.


79

Chapter 3 CONSTRUCTION AND EQUIPMENT FOR EXISTING SHIPS 3.1 General 3.1.1 Application

The requirements of this chapter apply to existing ships. 3.2 Requirements for installation of construction and equipment 3.2.1 Equipment for the prevention of discharge of noxious liquid substances

1 For existing ships, equipment for the prevention of discharge of noxious liquid substances specified in Table 4-4 is to be provided according to the category and physical properties of the noxious liquid substance to be carried, and sea areas for discharge.

2 For ships intending to remove residues of a noxious liquid substance with a vapour pressure exceeding 5 kPa at 20 oC by ventilation, a ventilated tank washing system is to be provided in addition to the equipment specified in the preceding -1.

3 Notwithstanding the requirements of the preceding -1 and -2, the equipment for preventing of discharge of noxious liquid substances required to be installed in ships complying with the requirements of the following (1) and (2) are segregated ballast tank, cargo heating system (limited to ships carrying Category B substances with a melting point of 15 oC or more only), and arrangements for discharge to reception facilities.

(1) where it is intended to repeatedly carry in each tank only one of noxious liquid substances or compatible substance (this means one of noxious liquid substances requiring no tank cleaning for loading another substance which differs from the substance in question after its discharging).

(2) where it is intended to discharge the washings generated by the tank cleaning carried out only before repairs or drydocking of the ship to suitable reception facilities.

4 Notwithstanding the requirements in the preceding -1 to -3 above, the equipment for the prevention of discharge of noxious liquid substances to be provided in ships carrying noxious liquid substances of which vapour pressure exceeds 5 kPa at 20 oC intending to remove the residues by ventilation are to be the ventilated washing system.

3.2.2 Special requirements for existing ships carrying Category A substances, Category B substances or


Existing ships carrying Category A substances, Category B substances or Category C substances are to comply with the requirements of the Bulk Chemical Code applicable to ships specified in the requirements of the Code shown in Table 4-6 according to the mode of service and date of construction. However, liquefied gas carriers in bulk complying with the requirements separately provided for by VR intending to carry noxious liquid substances shown in Table 4-1(5) may be exempted.

3.2.3 Special requirements for existing ships carrying oil-like substances

Notwithstanding the requirements of 3.2.1 and 3.2.2, oil tankers carrying noxious liquid substances in bulk, which do not carry noxious liquid substances other than oil-like substances, intending to discharge the residues exclusively by using the equipment specified in Part 3 are to comply with the requirements of Table 4-7 according to the classification of the oil-like substances to carry.

3.2.4 Special requirements for existing ships engage in restricted trades

Notwithstanding the requirements in 3.2.1-1 above, ships which are judged appropriate by VR in consideration of their mode of trade may not be provided with a stripping system.


80

Table 4-5 Equipment for the prevention of discharge of noxious liquid substances in existing ships

Classification of

substances Category

A Category B Category C Category

D

Sea area of

discharge

All areas

Outside special area

Within special

area

Outside special area

Within special area

All areas

Equipment Physical

properties All

substances High

viscosity or solidifying property

Low viscosity or

non-solidifying property

All substances

High viscosity

or solidifying property

Low viscosity or non-

solidifying property


Low viscosity or

non-solidifying property

All substances

Prewash equipment × (Note 1)

× × (Note 2)

× × × (Note 2)

× × (Note 2)

⎯

Stripping system ⎯ × × ⎯ Discharge outlet below the waterline (Note 4)

× (Note 5)

× (Note 5)

× (Note 5)

⎯

Arrangements for discharge to reception facilities

× × (Note 6)

× (Note 6)

× (Note 6)

Cargo heating system

⎯ × (Note 7) ⎯ ⎯

Recording device for the discharge of residues

⎯ × (Note 4) (Note 8) ⎯ ⎯

Dilute water filling system

⎯ ⎯ ×

(Remark) × : to be provided ⎯: not required to be provided (Notes)

(1) Any ship which is capable of discharging the residue/water mixtures to a reception facility until the concentration of the substance in the effluent is at or below the value specified in Table 4-1(1) and until the tank is empty, may be exempted from this requirement.

(2) Any ship which carries out preprocessing by exclusively using the stripping system for removing the residues to the extent that the residues from stripping is reduced to the value specified in Table 4-8 or less may be exempted from this requirement.

(3) Any ship which reduces the amount of stripping system to 0.3 m3 or less may be exempted from this requirement. (4) No provisions are required before 31 December 1987. (5) Any ship which discharges only clean ballast may be exempted from this requirement. (6) Any ship which does not discharge unnecessary noxious liquid substances generated on board may be exempted. (7) Any ship carrying substances with a melting point lower than 15 oC may be exempted. (8) Limited to cases where Note 1 of Table 4-8 applies.


81

Table 4-6 Requirements for existing ships carrying category A substances, category B substances or category C substances

Mode of navigation Date of keel laying or placing building contract

No. of applicable Bulk Chemical Code

Ships whose building contract in placed before 2 November 1973

1.7.3 Existing ships engage in international voyages Ships whose building contract in placed on and

after 2 November 1973 1.7.2

Ships whose keel in laid before 1 July 1983 1.7.3* Existing ships other than the above Ships whose keel is laid on and after 1 July

1983 1.7.2

(Remark)

Existing ships of less than 1,600 tons gross tonnage asterisked are required to become complying with the requirements of the Code for the construction and equipment by 1 July 1994.

Table 4-7 Requirements for existing ships carrying oil-like substances

Classification of substances

Requirements for existing ships

Of the requirements specified on Part 3, those applicable to product carriers to be complied with.

Of the requirements specified in Bulk Chemical Code applied under the provision of 3.2.2 above, the requirements applicable to Type 3 ships are to be complied with.


The oil discharge monitoring and control equipment specified in 3.3.1-6, Part 3 is to be suitable for monitoring the oil-like substances to be carried

Of the requirements specified in Part 3, those applicable to product carriers to be complied with. Category D

substances The oil discharge monitoring and control equipment specified in 3.3.1-6, Part 3 is to be suitable for monitoring the oil-like substances to be carried.


82

Chapter 4 EQUIPMENT FOR THE PREVENTION OF DISCHARGE OF NOXIOUS LIQUID SUBSTANCES 4.1 General 4.1.1 Application

1 The requirements of this chapter apply to equipment for the prevention of discharge of noxious liquid substances provided in ships carrying noxious liquid substances in bulk in accordance with the requirements of Chapter 2 or Chapter 3.

2 Equipment for the prevention of discharge of noxious liquid substances is to meet the requirements of 1.3.1-5 to 1.3.1-8 in TCVN 6259-3:2003 Machinery installations.

4.2 Prewashing systems 4.2.1 General

Prewashing systems are to meet the requirements of 4.2.2 to 4.2.4 according to physical properties of the noxious liquid substances to be carried.

4.2.2 Washing machines

1 Where Category A substances or solidifying substances are to be carried, washing machines are to be located at such positions as all of the tank surfaces can be washed by taking into account the washing fluid pressure, capacity and reach of injection flow; where Category B substances or Category C substances are to be carried, washing machines are to be located at appropriate positions, so that tank washing is performed by rotary jets operated by a sufficiently high hydraulic pressure.

2 Washing machines are to have sufficient corrosion resistance against noxious liquid substances. 4.2.3 Pumps for washing machines

1 Pumps for washing machines are to be capable of supplying sufficient wash water that the washing machine in accordance with the requirements of 4.2.2-1 requires.

2 For minimizing the quantity of water in the tank during tank washing, means are to be provided to continuously discharge slops with a separate pump from the wash water pump specified in the preceding 4.2.2-1, and to encourage water flow running toward the suction point.

4.2.4 Wash water heating system

To ships intended to carry solidifying substances or those with a viscosity of 25 MPa.s or more at 20 oC, the wash water heating system is to be provided so that washing can be done with hot water at a temperature of 60oC or more, unless the properties of all of such substances make the washing less effective.

4.3 Stripping system 4.3.1 General

The stripping system is to be capable of drawing the noxious liquid substances at the bottom of the tank either with a pump or with an eductor when the cargo tank is washed.

4.3.2 Capacity of stripping system

The stripping system is to be capable of reducing noxious liquid substances to the volumes shown in Table 4.8 according to the date of keel laying of the ship and the classified category of noxious liquid substance.


83

Table 4-8 Capacity of stripping system

The quantity of stripping residue Category of ship Category B substance Category C substances

New ships 0.1 m3 or less 0.3 m3 or less Existing ships 0.3 m3 or less (1) 0.9 m3 or less (2) Note

1. The required total volume of the stripping residue (the sum of the quantity of stripping residues determined by water test and the quantity determined by calculating the clingage residue on tank surfaces) may be 1 m3 or 1/3,000 of the tank capacity, whichever is the greater until 2 October 1994.

2. The required total volume of the stripping residue may be 3 m3 or 1/1,000 of tank capacity, whichever is the greater until 2 October 1994.

4.3.3 Blowing system

For improving the capacity of the stripping system specified in the preceding 4.3.2 above, a blowing system may be provided.

4.4 Discharge arrangements below the waterline 4.4.1 General

The underwater discharge arrangements are to be consisting of the overboard discharge outlets below the waterline, discharge pump and discharge pipelines.

4.4.2 Arrangements of discharge outlets

1 The underwater discharge system is to be located within the cargo area in the vicinity of the turn of bilge to prevent the redrawing of noxious liquid substance through the sea water intake of the ship.

2 Where two discharge outlets are provided for achieving a high discharge efficiency, they are to be located on both sides of the ship.

4.4.3 Size of discharge outlets

1 The underwater discharge arrangements are to be such that the residues or residue/water mixtures to be discharged into the sea do not pass through the ship's boundary layer. In this case, the diameter of the discharge outlet, when the discharge is made normal to the ship side shell plating, is to be not smaller than the value calculated by the following formula:

D = QD/5L where;

D: minimum diameter of discharge outlet (m) L: distance from forward perpendicular to discharge outlet (m) QD: maximum rate of discharge selected at which the ship may discharge the noxious liquid substance

through the discharge outlet of the ship (m3 / h)

2 When the discharge is directed at an angle to the ship side shell plating, the formula specified in 4.4.3-1 above is to be modified by substituting for QD the component of QD which is normal to the ship side shell plating.

4.4.4 Discharge pumps

The discharge pump is to have a sufficient capacity for discharging residue/water mixture. 4.5 Discharge recording device of residues


84

4.5.1 General

The discharge recording device of residues is to comprise a discharge pump, timer and discharge recording device.

4.5.2 Discharge pumps

1 The discharge pump is to be capable of controlling the rate of discharge, and is to meet the following requirements (1) or (2):

(1)To be capable of regulating the rate of discharge either by changing the speed or by a throttling device provided in the discharge line.

(2)To have a constant rate of discharge not exceeding the allowable rate of discharge. The allowable rate of discharge means (a) or (b), whichever is less: (a)The maximum rate of discharge referred to in the requirements of the preceding 4.4.3. (b)Where residues or residue/water mixture discharged from a slop tank, the value separately provided by

VR according to the properties of the residues.

2 The pump in accordance with the requirements of the preceding -1(1) above is to be provided with a flow rate indicating device.

3 The pump may be used in common with the pump specified in 4.4.4. 4.5.3 Time recording device

The time recording device is to be capable of recording the actual starting time and stopping time of discharge. However, dates may be recorded either manually or automatically.

4.5.4 Discharge rate recording device

The discharge rate recording device is to be capable of measuring the flow rate and recording the measured results. The accuracy of the discharge rate recording device is to be within ±15% of the actual flow rate.

4.5.5 Equivalents

Alternative manual means are to be provided for a possible failure of the recording devices complying with the requirements of 4.5.3 and 4.5.4 above, and arrangements are to be made so that the failed device can be reconditioned within at least 60 days.

4.6 Arrangements for discharge to reception facilities 4.6.1 General

1 The arrangements for discharge to reception facilities are to have a discharge manifold for connection to reception facilities for the discharge of noxious liquid substances, and are to be located on the open deck on both sides of the ship.

2 For ships intending to discharge the residue/water mixture generated by tank washing to reception facilities exclusively through the discharge arrangements of the ship, relaxation of the requirements of the preceding 4.6.1-1 above may be considered where VR judges it to be appropriate.

4.7 Dilute water filling system 4.7.1 General


85

The dilute water filling system is to be provided with the filling pump and water filling lines, and the capacity of the pump is to be such that water equivalent to nine times or more of the amount of residue is to be filled into the tank effectively.

4.8 Cargo heating system 4.8.1 General

1 The cargo heating system is to be capable of effectively heating the noxious liquid substance carried.

2 The cargo heating system is to be provided in the tank which has no common walls with any members of the ship side shell plating.

4.9 Ventilated washing system 4.9.1 General

The ventilated washing system is to be comprised of a ventilation equipment and a device for confirmation. 4.9.2 Ventilation equipment

The ventilation equipment is to meet the following requirements (1) through (5):

(1) The capacity is to be such that an air jet reaching the bottom of the tank in consideration, and to have a capacity calculated from Fig. 4.1 Jet penetration depth is to be compared against tank height.

(2) The ventilation equipment is to be provided at the tank opening which is closest to the suction point of the tank or the tank sump.

(3) Arrangements are to be made in such a way that an air jet is oriented to the tank sump or the suction point as far as practicable, and that direct impingement of the air jet onto the tank structural members can be avoided as far as practicable.

(4) Means are to be provided so that the residues can be removed from the relevant pipelines drained. (5) The ventilation equipment is to be sufficiently corrosion resistant for the noxious liquid substances or inert

gas. 4.9.3 Verification device

The verification device is to be capable of confirming if visible residues are remaining in the tank and the effect of the ventilated washing either by a visual inspection or equivalent other means.

4.9.4 Application of the rules for the classification and construction of sea-going steel ships

Where the residues are removed from the tank by means of the ventilated washing system, the safety hazard concerning the flammability and toxicity of the cargo is to be checked, and the requirements of 4.9 of this Part and the relevant requirements of the Rules for the Classification and Construction of Sea-going Steel Ships are to be complied with.

4.10 Segregated ballast tanks 4.10.1 General

The capacity of a segregated ballast tank is to be such that the draughts and trim of the ship meet the following requirements (1) to (3) where only the segregated ballast tank under consideration is filled with ballast water:

(1) The moulded draught of the ship at midship is the value determined by the following formula or more: 1.550 + 0.023Lf (m)

(2) The aft trim is to be the value determined by the following formula or less: 1.600 + 0.013Lf (m)


86

(3) The propeller is to be totally immersed in water.

300 mm

150 mm

230 mm

460 m

m

300

400

500

Min

imum

flow

rate

for e

ach

inle

t (m

3 /min

)

200

600

10 20 30 38,1 Inlet jet penetration depth (m)

Fig. 4-1 Minimum flow rate as a function of jet penetration depth Jet penetration depth is to be compared against tank height


87

Part 5 SHIPBOARD OIL POLLUTION EMERGENCY PLANS


The requirements in this Part apply to Shipboard Oil Pollution Emergency Plans to be placed on board ships and offshore drilling rigs and other platforms used for the exploitation of sea-bed mineral resources.

1.1.2 Equipment requirements

Every oil tanker of 150 tons gross tonnage and above, every ship other than an oil tanker of 400 tons gross tonnage and above and offshore drilling rigs and other platforms used for the exploitation of sea-bed mineral resources is to carry on board permanently a Shipboard Oil Pollution Emergency Plan approved by VR in a place where it is ready for immediate use.


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Chapter 2 TECHNICAL REQUIREMENTS 2.1 General 2.1.1 Precautions for preparation

Shipboard Oil Pollution Emergency Plans are to be prepared considering back ground information on the ship including type and size of the ship, cargo and trade routes so that they are realistic, practical, and easy to use.

2.1.2 Language

Shipboard Oil Pollution Emergency Plans are to be written in the working language of the master and officers of the ship. If the language used in the plan is not English, an English translation is to accompany it. For ships not engaged in international voyages, the case is to be dealt with as deemed appropriate by VR.

2.2 Entries in shipboard oil pollution emergency plans 2.2.1 Procedures to be followed when reporting an oil pollution incident

1 It is to be included in the plan that the master or other person having charge of the ship should inform without delay, of actual or probable discharge to the nearest coastal States.

2 The following items (1) through (7) are to be entered as the items to be reported:

(1) Ship name, call sign, flag, size and type of the ship (2) Date and time of incident, position, course, speed (3) Radio station name, date and time of next report, type and quantity cargo/bunkers on board, shipper (4) Brief details of defects/deficiencies/damage (5) Brief details of pollution including type of oil, estimate of quantity lost, cause of spill, possibility of

continued spill, sea and weather conditions (6) Contact details of ship's owner/operator/agent including postal address, telephone No. and facsimile No. (7) Post-spill actions taken and ship's movements

2.2.2 List of authorities or persons to be contacted in the event of an oil pollution incident

Coastal State contacts, port contacts and ship interest contacts, e. g., owners/operators, charterers, shippers, underwriters, who are to be contacted if the ship is involved in an oil pollution incident are to be listed and be included in the Appendices.

2.2.3 Actions to be taken immediately by persons on board the ship to reduce or control the discharge of

following the incident

1 At least the following items (1) to (3) are to be entered for responding to operational spills:

(1)A detailed description of the action to reduce or control the discharge of oil and persons in charge (2)Procedures for removal of oil spilled and for the proper disposal of removed oil and clean-up materials (3)Oil transfer procedures from the ship to another ship

2 At least the following items (1) to (3) are to be entered to respond to spills resulting from casualties:

(1) Top priority is to be given to ensuring the safety of the personnel and the ship. (2) Detailed information on the damage sustained by the ship and the oil spill incident is to be collected and

evaluated so that actions can be taken to prevent an escalation of the incident. (3) Detailed guidance for stability and stress considerations or a list of information needed for assessments at

the owner's head office or other entity. 2.2.4 The procedures and point of contact on the ship for coordinating shipboard activities with the

national and local in combating the pollution


89

1 It is to be included in the plan that the master and other person having charge of ships should contact the coastal State for authorization before actions are taken to mitigate a discharge.

2 Sufficient guidance for the master of the ship on oil pollution control operations to be developed under the initiative of the owner is to be included.

3 Information on response systems and organizations of the coastal States along the trade route of the ship is to be included in the Appendices.

2.2.5 Other information

VR may request, in addition to the items specified in 2.2.1 to 2.2.4, other information that would be useful to the master of the ship when responding to an emergency situation.

2.3 Appendices to shipboard oil pollution emergency plans

In addition to the list specified in 2.2.2 and information shown in 2.2.4-3, the plans and data specified in the following (1) to (3) are to be appended to the Shipboard Oil Pollution Emergency Plan:

(1) Plans including General Arrangement, Midship Section, piping diagrams such as Cargo Oil Lines considered to be used in dealing with an oil spill incident.

(2) Summary flowchart to guide the master through the various actions and decisions required during an incident response.

(3) Other items deemed necessary by VR.


90

Part 6 SHIPBOARD marine POLLUTION EMERGENCY PLAN For noxious liquid substances

Chapter 1 GENERAL


The requirements in this Part apply to Shipboard marine Pollution Emergency Plans for noxious liquid substances to be placed on board ships.

1.1.2 Equipment requirements

Every ships of 150 gross tonnage and above certified to carry noxious liquid substances in bulk is to carry on board permanently a Shipboard Marine Pollution Emergency Plan for Noxious Liquid Substances approved by VR in a place where it is ready for immediate use. This requirement applies to all such ships not later than 1 January 2003.


91

Chapter 2 TECHNICAL REQUIREMENTS 2.1 General 2.1.1 Precautions for preparation

Shipboard Marine Pollution Emergency Plan for Noxious Liquid Substances is to be prepared considering the many variables including type and size of the ship, cargo and trade route at the preparation, and so that it is realistic, practical, and easy to use.

2.1.2 Language

Shipboard Marine Pollution Emergency Plan for Noxious Liquid Substances is to be written in the working language understood by the master and officers of the ship. If the language used in the plan is not English, an English translation is to accompany it. For ships not engaged in international voyages, the Plan may be written in the language deemed appropriate by VR.

2.2 Entries in Shipboard Marine Pollution Emergency Plan for Noxious Liquid Substances 2.2.1 Procedures to be followed when reporting a noxious liquid substance pollution incident

1 It is to be included in the plan that the master or other person having charge of the ship should inform of actual or probable discharge to the nearest coastal States without delay.

2 The following items (1) through (7) are to be entered as the items to be reported:

(1) Ship name, call sign or ship station identity, flag, size and type of the ship (2) Date and time of incident, position, course, speed (3) Date and time of next report, type and quantity cargo/bunkers on board, shipper (4) Brief details of defects/deficiencies/damage (5) Brief details of pollution including type of noxious liquid substance, estimate of quantity lost, cause of

spill, possibility of continuation of spill, sea and weather conditions (6) Contact details of ship's owner/operator/agent including postal address, telephone No. and facsimile No. (7) Post-spill actions taken and ship's movements

2.2.2 List of authorities or persons to be contacted in the event of a noxious liquid substance

pollution incident

Coastal State contacts, port contacts and ship interest contacts, e. g., owners/operators, charterers, shippers, underwriters, who are to be contacted if the ship is involved in a noxious liquid substance pollution incident are to be listed and be included in the Appendices.

2.2.3 Actions to be taken immediately by persons on board the ship to reduce or control the discharge of

noxious liquid substance following the incident

1 At least the following items (1) to (3) are to be entered for responding to operational spills:

(1) A detailed description of the action to reduce or control the discharge of noxious liquid substance, and persons in charge

(2) Procedures for removal of spilled noxious liquid substance and for the proper disposal of removed noxious liquid substance and clean-up materials

(3) Procedures for transfer of the noxious liquid substance from the ship to another ship

2 At least the following items (1) to (3) are to be entered to respond to spills resulting from casualties:

(1) Top priority is to be given to ensuring the safety of the personnel and the ship. (2) Detailed information on the damage sustained by the ship and the oil spill incident is to be collected and

evaluated so that actions can be taken to prevent an escalation of the incident.

Chapter 2, Part 6, tcvn 6276: 2003

92

(3) Detailed guidance to consider stability and strength and a list of information needed for damage stability and strength assessment at the owner's head office or other other similar places.

2.2.4 The procedures and point of contact on the ship for coordinating shipboard activities with the

national and local in combating the pollution

1 It is to be included in the plan that the master and other person having charge on board the ship should contact the coastal State for authorization before actions are taken to mitigate a discharge.

2 Sufficient guidance for the master of the ship on noxious liquid substance pollution control operations to be developed under the initiative of the owner is to be included.

3 Information on response systems and organizations of the coastal States along the trade route of the ship is to be included in the Appendices.

2.2.5 Other information

VR may request, in addition to the items specified in 2.2.1 to 2.2.4, other information that would be useful to the master of the ship when responding to an emergency situation.

2.3 Appendices to shipboard oil pollution emergency plans

In addition to the list specified in 2.2.2 and information shown in 2.2.4-3, the plans and items specified in the following (1) to (3) are to be appended to the Shipboard Marine Pollution Emergency Plan for Noxious Liquid Substances:

(1) Plans including General Arrangement, Midship Section, piping diagrams such as Cargo Oil Lines considered to be used in dealing with noxious liquid substance spill incident.

(2) Summary flowchart to guide the master through the various actions and decisions required during an incident response.

(3) Other items deemed necessary by VR.


93

Part 7 equipment for the prevention of pollution by sewage


The requirements in this Part apply to the equipment for the prevention of pollution by sewage from ships. 1.1.2 Terminology

For the porpose of the requirements in this Part, the following definitions apply:

(1) “ New ship” means a ship: (a) for which the building contract is placed, or in the absence of a building contract, the keel of

which is laid, or which is at a similar stage of construction, on or after 27 September 2003; or (b) the delivery of which is on or after 27 September 2006

(2) “ Existing ship” means a ship which is not a new ship.

(3) “ Sewage” means : (a) drainage and other wastes from any form of toilets and urinals; (b) drainage from medical premises (dispensary, sick bay, etc.) via wash basins, wash tubs and

scuppers located in such premises; (c) drainage from spaces containing living animals; or (d) other waste waters when mixed with the drainage defined above.

(4) “ Holding tank” means a tank used for the collection and storage of sewage.

(5) “ From the nereast land” means from the baseline from which the territorial sea of the territory in question is established in accordance with international law, except the case off the north-eastern coast of Australia specified in Regulation 1.5 of Annex IV.


94

Chapter 2 equipment for the prevention

of pollution by sewage from ships 2.1 General 2.1.1 Application

1 The requirements of this chapter apply to the following ships engaged in international voyages:

(1) New ships of 500 tons tonnage and above;

(2) New ships of less than 500 tons gross tonnage which are certified to carry more than 15 persons; and

(3) Existing ships of 500 tons gross tonnage and above, on 27 September 2008; and

(4) Existing ships of less than 500 tons gross tonnage which are certified to carry more than 15 persons, on 27 September 2008; and

2 Existing ships, according to -1(3) and (4) above, the keel of which are laid or which are of a similar stage of construction before 2 October 1983 are to be equipped, as far as practicable, to discharge sewage in accordance with the requirements of 2.2.1.

2.2 Requirements for Installation of Equipment 2.2.1 Equipment for the Prevention of Pollution by Sewage

For ships specified in 2.1.1-1, the following equipment for the preven tion of pollution by sewage is to be installed.

(1) One of following sewage systems (a) A sewage treament plant as deemed appropriate by the VR (b) A sewage comminuting and disifecting system as deemed appropriateby the VR, accompanied

with facilities to the satifaction to the VR for the temporary storage of sewage when the ship is less than 3 nautical miles from nearest land, or

(c) A holding tank of the capacity to the satisfaction of the VR for the retention of all sewage, having regard to the operation of the ship, the number of person on board and other relevant factors. The holding tank is to be constructed to the satisfaction of the VR and to have a means to indicate visually the amount of its contents.

(2) A pipeline to discharge sewage to a reception facility

(3) A standard discharge connection fitted for the pipeline specified in (2) in accordance with Table 7-1. For ships in dedicated trades, i.e. passengers ferries, alternatively the ship’s discharge pipeline may be fitted with a discharge connection which can be accepted by the VR, such as quick-connection couplings.


95

Table 7-1 Standard Dimensions of Flanges for Discharge Connection

Description Dimension

Outside diameter 210mm

Inner diameter According to pipe outside diameter*

Bolt circle diameter 170mm

Slots in flange 4 holes 18mm in diameter equidistantly placed on a bolt circle of the above diameter slotted to the flange periphery.

Flange thickness 16mm

Bolts and nuts: quanlity and diameter 4, each of 16mm in diameter and of suitable length

The flange is designed to accept pipesup to a maximum internal diameter of 100mm and is to be of steel or other equivalent material having a flat face. This flange, together witha suitable gaskets, is to be suitable for a service pressure of 0.6 MPa.

Remarks:

* For ships a muolded depth of 5m and less, the inner diameter of the discharge connection may be 38mm.

tcvn 6276: 2003, Appendix

96

Appendix GUIDANCE FOR THE DISCHARGE OF NOXIOUS LIQUID SUBSTANCES, ETC.

Chapter 1


This Appendix gives a reference for approving a procedures and arrangements manual for the discharge of noxious liquid substances, which is to be submitted in accordance with the provisions in 2.1.2-1(3) of Part 2 of the Rules by giving guidance for discharging noxious liquid substances or those provisionally assessed as their equivalents and ballast water, tank washings or other residues or mixtures containing preceding noxious liquid substances (hereinafter referred to as the "noxious liquid substances, etc." in this Appendix ) by using the construction and equipment specified in Part 4 of the Rules for the Survey and Construction of Marine Pollution Prevention Installations.

1.1.2 Discharge from ships en route

The discharge into the sea of noxious liquid substances, etc. when the ship is proceeding en route is to be prohibited except when all the following conditions are satisfied:

(1) the ship is proceeding en route at a speed of at least 7 knots in the case of self-propelled ships or at least 4 knots in the case of ships which are not self-propelled;

(2) the discharge is made below the waterline, taking into account the location of the seawater intakes. However, if noxious liquid substances, etc. are mainly comprising Category D substances, this requirement may be dispensed with;

(3) the discharge is made at a distance of not less than 12 nautical miles from the nearest land of any one state;

(4) the discharge is made in a depth of water of not less than 25m. However, if noxious liquid substances, etc. are mainly comprising Category D substances, this requirement may be dispensed with.

1.1.3 Noxious liquid substances, etc. removed by ventilation procedures

The requirements of this Appendix may not apply when the discharge is made of the water filled into the tank after using the ventilation procedures complying with the requirements of 4.9 of Part 4 of the Rules for removing the cargo residues from the tank.

1.2 Discharge of noxious substances outside special areas 1.2.1 Category A noxious liquid substances, etc.

The discharge into the sea of Category A noxious liquid substances, etc. is to be prohibited. If tanks containing such substances or their mixtures are to be washed, the resulting residues are to be discharged to a reception facility until the concentration of the substance in the effluent to such facility is at or below the residual concentration in percent weight specified in column I of Table 4.1(1), Chapter 1, Part 4 of the Rules and until the tank is empty. Provided that the residue then remaining in the tank is subsequently diluted by the addition of a volume of water, it may be discharged into the sea in accordance with 1.1.2.

1.2.2 Category B noxious liquid substances, etc.

The discharge into the sea of Category B noxious liquid substances, etc. is to be prohibited except when all the following conditions (1) to (3) are satisfied:


97

(1) the ship complies with 1.1.2; (2) the procedures and arrangements for discharge are to ensure that the concentration and rate of discharge of

the effluent is such that the concentration of the substances in the wake astern of the ship does not exceed 1 ppm.

(3) the maximum quantity of cargo discharged from each tank and its associated piping system does not exceed of 1 m3 or 1/3,000 of the tank capacity in m3.

1.2.3 Category C noxious liquid substances, etc.

The discharge into the sea of Category C noxious liquid substances, etc. is to be prohibited except then all the following conditions (1) to (3) are satisfied:


the effluent is such that the concentration of the substances in the wake astern of the ship does not exceed 10 ppm;

(3) the maximum quantity of cargo discharged from each tank and its associated piping system does not exceed of 3 m3 or 1/1,000 of the tank capacity in m3.

1.2.4 Category D noxious liquid substances, etc.

The discharge into the sea of Category D noxious liquid substances, etc. is to be prohibited except when all the following requirements (1) and (2) are satisfied:

(1) the ship complies with 1.1.2; (2) the concentration of mixtures is to be such that it does not exceed 1/10 of the volume of water.

1.2.5 Noxious liquid substances, etc. of undefined category

The discharge into the sea of noxious liquid substances, etc. other than those noxious liquid substances defined in 2.1.1(4) in Part 1 of the Rules is to be prohibited.

1.3 Discharge of noxious liquid substances, etc. in special areas 1.3.1 Category A noxious liquid substances, etc.

The discharge into the sea of Category A noxious liquid substances, etc. is to be prohibited. If tanks containing such substances or their mixtures are to be washed in accordance with the requirements of 4.2 in Part 4 of the Rules, the resulting residues are to be discharged to a reception facility until the concentration of the substance in the effluent to such facility is at or below the residual concentration in percent weight specified in column II of Table 4.1(1), Chapter 1, Part 4 of the Rules and until the tank is empty. Provided that the residue then remaining in the tank is subsequently diluted by the addition of a volume of water, it may be discharged into the sea in accordance with 1.1.2.

1.3.2 Category B noxious liquid substances, etc.

The discharge into the sea of Category B noxious liquid substances, etc. is to be prohibited except when all the following conditions (1) to (3) are satisfied:

(1) the ship complies with 1.1.2; (2) the tank cleaning is to be carried out in accordance with the provisions of 4.2 in Part 4 of the Rules, and

the tank washings are to be discharged to a reception facility; (3) the procedure and arrangements for discharge are to ensure that the concentration and rate of discharge of

the effluent are to be such that the concentration of the substances in the wake astern of the ship does not exceed 1 ppm.


98

1.3.3 Category C noxious liquid substances, etc.

The discharge into the sea of Category C noxious liquid substances, etc. is to be prohibited except when all the following conditions (1) to (3) are satisfied:


the effluent is such that the concentration of the substances in the wake astern of the ship does not exceed 1 ppm;

(3) the maximum quantity of cargo discharged from each tank and its associated piping system does not exceed 1 m3 or 1/3,000 of the tank capacity in m3.

1.3.4 Category D noxious liquid substances, etc.

The discharge into the sea of Category D noxious liquid substances, etc. is to be in accordance with 1.2.4. 1.3.5 Noxious liquid substances, etc. of undefined category

The discharge into the sea of noxious liquid substances, etc. of unspecified category is to be in accordance with 1.2.5.

1.4 Liquid substances, etc. other than noxious liquid substances

The discharge into the sea of substances considered to be harmless for the human health, marine resources and amenity, and other lawful utilization of the sea is not subject to controls. These substances are listed in Table 4.9.


99

Table 4-9 List of liquid substances other than noxious liquid substances

Liquid substances other than noxious liquid substances

1. Octyldecyl adipate 2. Acetonitrile 3. Acetone 4. Aminoethyldiethanolamine/Aminoethylethanol amine solution 5. 2- Amino -2-Hydroxymethyl -1, 3-propanediol solution (40% less) 6. Sodium almino silicate sulurry 7. Sulphur 8. Ethyl alcohol 9. Ethylene glycol butyl ether, Ethylene Glycol tert - butyl ether 10. Ethylene - vinyl acetate copolymer (emulsion) 11. Calsiumnitrate/Magnesium nitrate/Potassium chloride solution. 12. Paraffins chlorinated (C14-C17) (with 52% chlorine) 13. Magnesium chloride solution 14. Sodium chlorate solution (50% or less) 15. Olefins (C13 and above, all isomers), alpha - Olefins (C13 - C18) 16. Kaolin slurry 17. Drilling brines: Calcium bromide solution Calcium chloride solution Sodium chloride solution 18. Glycine, sodium salt solution 19. Glycerin 20. Glycerol polyalkoxylate 21. Glucose solution, Dextrse solution 22. Isopropyl acetate 23. Methyl acetate 24. 3 - Methyl - 3- Methoxy butyl acetate 25. Alcoholic beverages, n.o.s. 26. Alcohols (C13 and above), Behenyl alcohol 27. Vegetable portein solution (hydrolyzed) 28. Diethanolamine 29. Diethyl ether 30. Diethylene glycol 31. Diethylene glycol diethyl ether 32. Diethylene glycol ethyl ether 33. Diethylene glycol butyl ether 34. Diethylenetriamine pentaacetic, pentasodium solution 35. Dipropylene glycol 36. Magnesium hydroxide slurry 37. Butyl stearate 38. Coal slurry 39. Sorbitol solution 40. Tert - Amyl alcohol 41. Ethylene carbonate 42. Calcium carbonate solution


100

Table 4-9 List of liquid substances other than noxious liquid substances (cont'd.)

Liquid substances other than noxious liquid substances

43. Tetraethylene glycol 44. Molasses 45. Glycerol triacetate 46. Triisopropanolamine 47. Triethylene glycol 48. Triethylene glycol butyl ether 49. Tridecane 50. Tripropylene glycol 51. Lard 52. Dodecane (all isomers) 53. Dodecyl benzene 54. Urea/formaldehyde resin solution 55. Urea solution 56. Clay slurry 57. n-Paraffins (C10 - C20) 58. Paraffin wax 59. Diheptyl phthalate, dioctyl phthalate 60. Dihexyl phthalate 61. Diheptyl phathalate 62. n- Butyl alcohol, sec - Butyl alcohol, tert - Butyl alcohol, Isobutyl alcohol 63. n- Propyl alcohol, Isopropyl alcohol 64. Propylene - butylene copolymer 65. Propylene glycol 66. Hexamethylene glycol 67. Hexylene glycol 68. Petrolatum 69. Benzene tricarboxylic acid, trioctyl ester 70. Fatty acid (saturated, C13 and above), Tridecanoic acid 71. Polyethylene glycols 72. Polyethylene glycol methyl ether 77. water 78 Cetyl/Eicosil methacrylate mixtures 79. Dodecyl marhacrylate 80. Dodecyl/pentadecyl mathacrylate mixtures 81. Rõìc Metylic 82. Methyl ethyl ketone 83. 2 - Methyl - 2- hydroxy - 3 - butyne 84. 3 - Methyl - 3- methoxy butanol 85. 3 - Methoxyl - 1 - butanol 86. Latex (Carboxylated styrene - butadiene copolymers Stylene - butadien rubber) 87. Lignin sulphonic, sodium salt solution 88. Apple juice 89. Substances povisionally assessed to be noxious to the same level of any substances by the Administration. 90. Mixtures of substances outside the Category A, B, C and D categorized by the MEPC/Circ.214.

tcvn 6276_v_e

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