codes for vessels-heat exchangers

7/25/2019 Codes for Vessels-Heat Exchangers

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CODES FOR VESSELS/HEATEXCHANGERS


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The American Society of Mechanical Engineers (ASME)

is a professional body, specifically an engineering society,

focused on mechanical engineering.

The ASME was founded in 1880 by Alexander Lyman , in

response to numerous steam boiler pressure vessel

failures

The orani!ation is "nown for settin #odes and standards

for me#hani#al devi#es$

The ASME conducts one of the world's largest technicalpublishing operations through its ASME ress, holds numerous

technical conferences and hundreds of professional

de!elopment courses each year, and sponsors numerous

outreach and educational programs.


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History of pressure vesselcodes

" oiler e!plosio" o" #$rc% &'( )*'+ i"roc,to"( #$ss$c%usetts-

" +. ,illed $"d )) i"0ured-

" Need of le1isl$tive rules $"d re1ul$tio"for co"structio" of 2oilers-

" T%e 3rst oiler $"d 4ressure Vessel

Code 5$s pu2lis%ed i" )*)+-" Necess$ry c%$"1es 6$de $"d "e5sectio"s $dded $s "eed $rose-


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The #. $. %ro!er & ompany

Shoe actory $oiler Eplosion

(March *+, -+)


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STA%&A'&S

A Standard can be defined as a set of technical

definitions and guidelines that function as

instructions for designers, manufacturers, operators,

or users of e/uipment.

()&E

A standard becomes a ode when it has beenadopted by one or more go!ernmental bodies and is

enforceable by law, or when it has been incorporated

into a business contract.


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N$tio"$l Codes

" Nu62er of "$tio"$l codes %$ve 2ee"developed for pressure vessels 2y di7ere"tcou"tries-

" 8" 8"di$( t%e code for pressure vessels is 8S9&.&+


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ASME

ASME is one of the oldest standards0de!eloping

organi1ations in the world.

2t produces approimately 3++ codes and standards2t co!ers many technical areas, such as boiler

components, ele!ators, measurement of fluid flow in

closed conduits, cranes, hand tools, fasteners, and

machine tools.


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:HAT ARE AS#E CODES;

" T%ey $re st$"d$rds t%$t providesrules for t%e desi1"( f$2ric$tio"( $"di"spectio" of 2oilers $"d pressure

vessels-

" T%is est$2lis%es $"d 6$i"t$i"sdesi1"( co"structio" $"d i"spectio"

st$"d$rds providi"1 6$!i6u6protectio" of life $"d property-


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AS#E Codes 9 #$"uf$cturer

" A 6$"uf$cturer o2t$i"s per6issio" to use o"e of t%est$6ps t%rou1% t%e AS#E $ssess6e"t process-

" T%e 6$"uf$cturer


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:%y follo5 AS#E codes;

" E!cessive el$stic defor6$tio" i"cludi"1el$stic i"st$2ility

" E!cessive pl$stic defor6$tio"

" rittle fr$cture" Stress rupture or creep defor6$tio"

>i"el$stic?

" Hi1% str$i" $"d lo5 cycle f$ti1ue" Stress corrosio"

" Corrosio" f$ti1ue


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T%e or1$"i@$tio" of t%e AS#E oiler $"d 4ressure Vessel Code is $sfollo5s

)- Sectio" 8 4o5er oilers

&- Sectio" 88 #$teri$l Speci3c$tio"

i- Ferrous #$teri$l Speci3c$tio"s B 4$rt A

ii- No"9ferrous #$teri$l Speci3c$tio"s B 4$rt

iii- Speci3c$tio"s for :eldi"1 Rods( Electrodes( $"d Filler #et$ls B 4$rtC

iv- 4roperties B 4$rt D

- Sectio" 888 Su2sectio" NCA Ge"er$l Re=uire6e"ts for Divisio" ) $"dDivisio" &

i- Sectio" 888 Divisio" )

$- Su2sectio" NA Ge"er$l Re=uire6e"ts

2- Su2sectio" N Cl$ss ) Co6po"e"ts


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" Su2sectio" NC Cl$ss & Co6po"e"ts

d- Su2sectio" ND Cl$ss Co6po"e"ts

e- Su2sectio" NE Cl$ss #C Co6po"e"tsf- Su2sectio" NF Co6po"e"t Supports

1- Su2sectio" NG Core Support Structures

%- Appe"dices Code C$se N9 Cl$ss )Co6po"e"ts i" Elev$ted Te6per$tureService

" Sectio" 888( Divisio" & Codes for Co"crete

Re$ctor Vessel $"d Co"t$i"6e"t" Sectio" 8V Rules for Co"structio" of He$ti"1

oilers

"Sectio" V No"destructive E!$6i"$tio"s


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" Sectio" V8 Reco66e"ded Rules for t%e C$re $"dOper$tio" of

He$ti"1 oilers

" Sectio" V88 Reco66e"ded Guideli"es for C$re of4o5er oilers

" Sectio" V888

i- Divisio" ) 4ressure Vessels B Rules forCo"structio"

ii- Divisio" & 4ressure Vessels B Alter"$tive Rules

" Sectio" 8X :eldi"1 $"d r$@i"1 u$li3c$tio"s

" Sectio" X Fi2er1l$ss9Rei"forced 4l$stic 4ressureVessels

" Sectio" X8 Rules for 8"9Service 8"spectio" ofNucle$r 4o5er 4l$"t Co6po"e"ts


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St$6ps


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No6e"cl$ture


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E!$6ple

" A %e$t e!c%$"1er =u$li3es $s $ #st$6ped pressure vessel if

9 Desi1" pressure )+psi1

9 8"ter"$l volu6e )-+ cu2ic ft- for)+'4'' psi1

9 8"ter"$l volu6e + cu2ic ft- fordesi1" 4 upto &+' psi1


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E!$6ple

" A %e$t e!c%$"1er =u$li3es $s $ st$6ped pressure vessel if

9 Desi1" pressure I '' psi1

9 8"ter"$l volu6e I )-+ cu2ic ft- for)+'4'' psi1

9 8"ter"$l volu6e I + cu2ic ft- fordesi1" 4 upto &+' psi1


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vessels

Item IS-2825 ASME Code

Section VIII

BS-5500 AD-

Merkblatter

Scope ""3red fusio"5eldedpressure

vessels"4ressure &'N/66&"Do/Di )-+"Di I )+' 66":$ter

c$p$city I +'litres

":elded( riveted(for1ed $"d2r$@ed vessels

":$terc$p$cityI)&' 1$l"Oper$ti"1pressure I )+ psi"DiIJ

""3redfusio"5elded

pressurevessels"#ediu6 $"d%i1% pressurestor$1evessels

"E!cludestr$"sport$2levessels-

"Do/Di )-"Vessels $"dvessel p$rts

predo6i"$"tly u"derst$tic lo$d-

materials "C$r2o" $"dlo5 $lloysteels( %i1%$lloy steel( Cu

"S$6e $s 8S9&.&+"C$st iro"( li"ed6$teri$l c$stiro"( ferritic steel

"C$r2o"(ferritic$lloy>lo5 $"d%i1%? $"d

All 6et$llic6$teri$ls$"d 1r$p%ite(1l$ss-

o6p$r so" o pressure


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o6p$r so" o pressurevessels

National

code

U..S !ield

"tren#t$

Sr%r&'t&re

"tre""(

Cree'

"tre""

AS#E V888Div )

)- 9 )

AS#E V888Div9&

)-+ 9 9

S9)+)+ 9 9 9

S9)+)+4$rt 88

&-+ )-+ )-+ )

S9++'' &-+ )-+ )- )

ANCC 9 )-+ )-+ 9

8S9&.&+ )-+ )-+ )


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E!plosio"s


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" 8" spite of so6e of t%e 6ost ri1orous( 5ell9co"ceived s$fety rules $"d procedures ever

put to1et%er( 2oiler $"d pressure vessel$ccide"ts co"ti"ue to occur-

" 8" )*.'( for e!$6ple( t%e N$tio"$l o$rd ofoiler $"d 4ressure Vessel 8"spectors

reported9 )*& 2oiler $"d pressure vessel $ccide"ts(

)'. i"0uries $"d && de$t%s-

" T%e pressure vessel e!plosio"s $re ofcourse r$re "o5$d$ys $"d $re ofte" c$used2y i"correct oper$tio" or poorly 6o"itoredcorrosio"-


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Ho5 $void E!plosio"s

" S$fety i" 2oiler $"d pressure vessels c$"2e $c%ieved 2y

4roper desi1" $"d co"structio"

4roper 6$i"te"$"ce $"d i"spectio"

4roper oper$tor perfor6$"ce $"d vessel

oper$tio"

codes for vessels-heat exchangers

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