sub tender change notice (tcn) - 02

POWER SECTOR EASTERN REGION, DJ-9/1, SALT LAKE CITY, KOLKATA - 700 091

(033) 23211960 (033) 2339 8000

TCN - 02 Ref: PSER:SCT:SDG-B2100:TCN-02 Date:04-03-2021

Sub Tender Change Notice (TCN) - 02. Job ERECTION, TESTING, COMMISSIONING OF BOILER & AUXILIARIES INCLUDING ESP,FGD

& SCR OF 1 X 660 MW UNIT-5, SAGARDIGHI TPEP,W.B. Ref 1.0 BHEL's NIT, vide reference no. PSER:SCT:SDG-B2100:8486 Date: 25-02-2021.

2.0 BHEL’s TCN-01, vide reference no PSER:SCT: SDG-B2100:TCN-01 Date: 04-03-2021 3.0 All other pertinent issues till date.

With reference to above, following points/documents, relevant to tender, may please be noted and complied with while submitting the offer.

1. Clarifications attached vide Annexure-A to this TCN-02.

2. Revised `No deviation certificate’ is attached. Bidder to submit `No deviation certificate’ as per

attached format only.

3. All other terms & conditions shall remain unchanged. Thanking you,

Yours faithfully, for BHARAT HEAVY ELECTRICALS LTD

Dy. Mgr (SCT) Encl: As Above.

SL. NO. REFERENCE CLAUSE

OF TENDER

EXISTING PROVISION BIDDER'S QUERY BHEL'S CLARIFICATION

1.0 FGD & SCR System - Please provide drawings for FGD & SCR system including Scrubber & Tanks.

Please also provide the welding schedule for Scrubber and Tanks.

Please confirm whether Lime Stone Silo is in the scope of work or not.

Design & engineering process is in progress as on date, so all required drawings for FGD & SCR

system including Scrubber & Tanks shall be provided progressively during execution. However,

preliminary GAD of Absorber, Procedure for surface preparation of steel plate and General information of

SCR system attached with this TCN for basic understanding purpose.

Design & engineering process is in progress as on date. Welding schedule for Scrubber and Tanks

shall be provided after finalization of same by BHEL-MU. However, interested bidder may refer the Boiler

welding schedule already provided with this tender and WPS for FGD attached with this TCN,for having

basic and preliminary idea on it.

Scope of Limestone silo could be confirmed after finalization of total design and drawing of FGD system.

2.0 Non-Pressure Parts - Please confirm Temporary Piping work required to carry out for steam blowing work is included in the

scope of Non-Pressure Parts.

Bidders to refer Non-Pressure parts (Group-III) of APPENDIX-I :APPROXIMATE WEIGHT SCHEDULE OF

MAJOR PACKAGES FOR 1X660 MW SAGARDIGHI PROJECT of VOLUME-IF-CML Rev-00

TECHNICAL CONDITIONS OF CONTRACT.

3.0 Erection of Structures - Please confirm that all Structures shall be provided as pre-fabricated condition. Please also confirm the

type of joint of pre-fabricated Structure i.e. bolted type or welded type. If the same is of bolted type then

required connection bolts shall be supplied by BHEL.

Please confirm whether Erection of Bunker Shell & Hopper is in contractor’s scope or not. If yes, then

please provide the shape & size of Shell segments and Hopper segments that will be supplied to

contractor.

Supply of materails for Boiler and Auxiliaries, ESP and Auxiliaries and other associated sytem will be as

per common standard of supply of BHEL-MUs for 660 MW unit.

PGMA items related to Mills and Bunkers are in the erection scope of Boiler agency however site

fabricated items of Mills and bunkers like: shell and hoppers are to be erected by structural job agency.

4.0 Clause No.40.1 of TERMS OF PAYMENT of

VOLUME-IF-CML Rev-00 TECHNICAL

CONDITIONS OF CONTRACT

The contractor shall submit his running bill…...release of

payment.

As per Clause No. 40.1 of SCC, RA bill payment will be paid after 45 days of submission of the bill. As per

Billing Schedule almost 17% to 18% payment of any item will be paid after achieving of milestone activities

where milestones like Coal Firing, Full Loading etc. are not dependent on contractor. Moreover activity

like Painting will not be applicable for many items. In view of the same we would request to revise the

Billing Schedule by restricting up to 10% payment against Milestone activities in order to ease the cash

flow as well as to execute the project in a smooth manner.

Shall be as per tender.

5.0 SL.No.1.0 (v)Salient Features of NIT DUE

DATE & TIME OF OFFER SUBMISSION of

NIT

DUE DATE & TIME OF OFFER SUBMISSION:Date: 04-03-2021

Time: 13-00 Hrs. IST.The…...accepted.

In order to explore market rates for various items and to submit our most competitive offer we would

request to extend the last date of offer submission for at least 07 (seven) days i.e. up to 11.03.2021.

Bidders to refer TCN-01.

JOB : ERECTION, TESTING, COMMISSIONING OF BOILER & AUXILIARIES INCLUDING ESP,FGD & SCR OF 1 X 660 MW UNIT-5, SAGARDIGHI TPEP,W.B.

ANNEXURE-A TO TCN-02

CLARIFICATIONS

Tender no:PSER:SCT:SDG-B2100:21.

CLARIFICATIONS

ANNEXURE-A TO TCN-02 PAGE 1 OF 1 TENDER NO PSER:SCT:SDG-B2100:21

TC1

TC2

TC3

TC4

TC5

TC6

HC1 HC3

HC2 HC4

HC5 HC6 HC7 RC1

RC2

RC3

RC4

RC5

RC6

RC7

RC8

RC9

RC10

RC11

RC12

ESC1ESC7

ESC4ESC5

ESC6ESC8

ESC2ESC3

ADC1

ADC2

ADC3

ADC4

ADC5

ADC6

TC1

TC2

TC3

TC4

TC5

TC6

HC1HC3

HC2HC4

HC5HC6HC7

ESC1 ES

C7

ESC4

ESC5

ESC6 ESC8

ESC2

ESC3

ADC1

ADC2

ADC3

ADC4

ADC5

ADC6

TC1

TC2

TC3

TC4

TC5

TC6

HC1HC3

HC2HC4

HC5HC6HC7

FOR TENDERING PURPOSE ONLY

Tender no: PSER:SCT:SDG-B2100:21(ANNEXURE-A TO TCN-02)


TC1

TC2

TC3

TC4

TC5

TC6

HC1HC3

HC2HC4

HC5HC6HC7

ESC7

ADC1

ADC2

ADC3

ADC4

ADC5

ADC6




TC1 TC2

TC3

TC4

TC5 TC

6

HC1

HC3

HC2

HC4

HC5

HC6

HC7

RC7

RC9

ESC7

TC1 TC2

TC3

TC4

TC5 TC

6

HC1

HC3

HC2

HC4

TC1 TC2

TC3

TC4

TC5 TC

6

HC1

HC3

HC2

HC4

TC1 TC2

TC3

TC4

TC5

TC6

HC1

HC3

HC2

HC4

TC1 TC2

TC3

TC4

TC6

TC1 TC2

TC3

TC4

TC5 TC

6

HC1

HC3

HC2

HC4

HC5

HC6

HC7

RC7

RC9

ESC7

TC1 TC2

TC3

TC4

TC5 TC

6

HC1

HC3

HC2

HC4

HC5

HC6

HC7

RC7

RC9

ESC7






1653717

Text Box


BHEL: BAP: RANIPET WELDING TECHNOLOGY CENTRE

PAGE 1 OF 2

Errir.17-3 iii,ii

R-10-153 QW — 482 ASME SECTION IX.

WELDING PROCEDURE SPECIFICATION ( WPS )

WPS NO: 233 DATE: 03.11.2020 Supporting PQR NO: 194

REV NO: DATE:

Welding process (es): Shielded Metal Arc Welding

TYPE: (Manual / Semi Auto / Auto): Manual

Application(s): Components of C276 Clad Steel Plate

QW — 402 JOINTS Joint design: Groove, Fillet & Plug Backing : No Backing Material Type : --

JOINT DETAILS

Refer Production Drawing

BASE METALS (QW-403) P.NO. Group No -- to P.NO. -- Group No -- (OR)

Specification type and grade: Clad Steel ASTM A 265 ((ASTM B575 (UNS N10276) + (Carbon steel A36/IS2062))

Specification type and grade: : Clad Steel ASTM A 265 ((ASTM B575 (UNS N10276) + (Carbon steel A36/152062))

Thickness Range: Base Metal: Groove: 1.5 mm to 20 mm Fillet: Unlimited Pipe Dia Range: Fillet

FILLER METALS ( QW-404 ) SMAW SMAW

Spec.No ( SFA ) 5.11 5.1

AWS No (Class) E NiCrMo-4 E 7018

F. Number 43 4

A . Number - -

Size of Filler Metals See Table See Table

Weld Metal Thickness Range: Groove:

Fillet: 4 mm Max.

All 16 mm Max.

All Electrode — Flux ( Class ) -- --

Flux Trade Name -- --

POSITIONS (QW — 405) Position(s) of Groove : All Welding Progression : Vertical up Position(s) of Fillet : All

PRE HEAT (QW— 406) Preheat Temp Min °C: Nil & Moisture on surface to be removed Interpass Temp Max °C : 150 Preheat Maintenance: --- Special heating applicable: ---



pmxhelpdesk.pser

Text Box


QW — 482 VVPS NO: 233 Date : 03.11.2020

REV NO :

PAGE 2 OF 2

ca-,---47-i 011

R-10-153

POSTWELD HEAT TREATMENT (QW- 407)

Temperature Range °C : NA Time Range : NA

GAS (QW — 408) Percent Composition Gas(es) Mixture Flow Rate

Shielding: NA Trailing : -- Backing : --

ELECTRICAL CHARACTERISTICS ( QW — 409 ) Current AC or DC : See Table Polarity : See Table Amps (Range) : See Table Volts (Range) : See Table Tungsten Electrode Size and Type : -- Mode of Metal Transfer for GMAW: --

Electrode Wire feed speed Range : --

TECHNIQUE (QW-410) String or Weave Bead : Stringer & Weave Bead ( Two times the Dia. Of Electrode) Orifice or Gas Cup Size : -- Initial and Interpass Cleaning : (Wire Brush, Chipping, Grinding,etc. ) Method of Back Gouging : Grinding Multiple or Single Pass (Per side) : Multiple Pass Multiple or Single Electrode : Single Travel Speed (Range) : --

Weld Layers

Process Filler Metal Current

Volt Range

Travel Speed Range

mm/Min.

Others (e.g. Remarks, Comments, Hot Wire Addition, Technique Torch Angle, Etc.)

Class Dia in

mm

Type Polarity

Amp. Range

Is't Side

Root

Filler

Filler 2nd Side

Root

Filler

SMAW

SMAW

SMAW

SMAW

SMAW

E7018

E7018

E7018

E NiCrMo4

E NiCrMo4

3.15

4.00

5.00

2.5

4.0

DC-EP

DC-EP

DC-EP

DCEP

DCEP

110-140

150-180

200-240

50-80

100-140

22-26

22-26

22-26

22-26

22-26

--

--

--

--

--

--

--

--

--

--

** Prior to welding, adjacent area within 40mm from edge preparation shall be free of dirt, grease or any other harmful materials to weld

FOR BHEL : BAP : RANIPET Prepared By Reviewed and Approved By

Signature & Seal: I A,

ditt .:e.itiii0.3A, LA NI U RUG A N ta,l'Pot.rt Production I kirr.': 'MI

Signature & Seal:

DyGeneral Ptil,,,inager i Production E3FIEL, / BAP

Date: ost I t I zo 2. if,,, , , I BAP MANE. ET -61.:,,,aki i P4M147.1- - 4Or Date: 17).a ) 1 Q) ' 632



pmxhelpdesk.pser

Text Box


BHEL: BAP : RANIPET WELDING TECHNOLOGY CENTRE

PAGE 1 OF 2

IE faliTia `iii

R-10-153 QW — 482 ASME SECTION IX.

WELDING PROCEDURE SPECIFICATION ( VVPS )

VVPS NO: 228 DATE: 12.09.19 Supporting PQR NO: 189

REV NO: DATE:



Application(s): Components of C276 Material (Haste alloy)

QW — 402 JOINTS Joint design : Groove ,Fillet & Plug Backing : No Backing Material Type : --

JOINT DETAILS


BASE METALS (QW-403) P.NO. 43 Group No -- to P.NO. 43 Group No -- (OR)

Specification type and grade: ASTM B575 (UNS N10276)


Thickness Range: Base Metal: Groove: 1.5 mm to 12 mm Fillet: Unlimited Pipe Dia Range: Fillet :

FILLER METALS ( QW-404) SMAW

Spec.No ( SFA ) 5.11

AWS No ( Class) E NiCrMo-4

F. Number 43

A . Number -

Size of Filler Metals See Table


Fillet: 12 mm Max.

All Electrode — Flux ( Class) -- --


POSITIONS (QW — 405) Position(s) of Groove : 3G ,2G, 1G Welding Progression : Vertical up Position(s) of Fillet : 3F,2F,1F

PRE HEAT (QW— 406) Preheat Temp Min °C: Nil & Moisture on surface to be removed Interpass Temp Max °C : 150 Preheat Maintenance: --- Special heating applicable: ---



pmxhelpdesk.pser

Text Box


'-

QW — 482 WPS NO: 228 Date : 12.09.2019

REV NO :

PAGE 2 OF 2

1E/14.4-.110111

00

R-10-153




Shielding: NA Trailing : -- Backing : --

ELECTRICAL CHARACTERISTICS ( QW — 409 ) Current AC or DC : See Table Polarity : See Table Amps (Range) : See Table Volts (Range) : See Table Tungsten Electrode Size and Type : -- Mode of Metal Transfer for GMAW: -- Electrode Wire feed speed Range : --

TECHNIQUE (QW-410) String or Weave Bead : Stringer & Weave Bead Orifice or Gas Cup Size : -- Initial and Interpass Cleaning : (Wire Brush, Chipping, Grinding ,etc. ) Method of Back Gouging : Grinding Oscillation : : -- Contact Tube to work Distance : -- Multiple or Single Pass (Per side) : Multiple Pass Multiple or Single Electrode : Single Travel Speed (Range) : -- Peening : -- Others : --

Weld Layers


Volt Range

Travel Speed Range

mm/Min.


Class Dia in

mm

Type Polarity

Amp. Range

Root

Filler

Cap

SMAW

SMAW

SMAW

E NiCrMo-4

E NiCrMo-4

E NiCrMo-4

2.50

3.15

4.00

DC-EP

DC-EP

DC-EP

60-80

70-90

90-120

22-28

22-28

22-28

--

--

--

--

--

--


FOR BHEL : BAP : RANIPET Prepared B Reviewed and As *roved By

Signature & Seal:/

' Dy. Manager/

• (071-401111‘

- ir ,.../

-IRUGAN Production / WTC /H1

Signature & Seal:

Dy.General Manager / Production M.VALAVA

Date: It 0 cr%rilelik 14"A 0 .. Date: \ 7 0



pmxhelpdesk.pser

Text Box


BHEL: BAP : RANIPET WELDING TECHNOLOGY CENTRE

R-10-153

PAGE 1 OF 2

r ETELla

"ii"

QW — 482 ASME SECTION IX. WELDING PROCEDURE SPECIFICATION ( WPS )

WPS NO: 229 DATE: 12.09.19 Supporting PQR NO: 190

REV NO: DATE:



Application(s): Components of C276 Material (Haste alloy) & IS 2062

QW — 402 JOINTS Joint design : Groove ,Fillet & Plug Backing : No Backing Material Type : --

JOINT DETAILS


BASE METALS (QW-403) P.NO. 43 Group No -- to P.NO. -- Group No -- (OR)


Specification type and grade: 1S2062 E250BR

Thickness Range: Base Metal: Groove: 1.5 mm to 12 mm Fillet: Unlimited

Pipe Dia Range: Fillet :

FILLER METALS ( QW-404) SMAW

Spec.No ( SFA ) 5.11

AWS No ( Class) E NiCrMo-4

F. Number 43

A . Number -

Size of Filler Metals See Table


Fillet: 12 mm Max.

All

Electrode — Flux ( Class) -- --


POSITIONS (QW — 405) Position(s) of Groove : 3G ,2G, 1G Welding Progression : Vertical up Position(s) of Fillet : 3F,2F,1F

PRE HEAT (QW— 406) Preheat Temp Min °C: Nil & Moisture on surface to be removed lnterpass Temp Max °C : 150 Preheat Maintenance: --- Special heating applicable: ---



pmxhelpdesk.pser

Text Box


R-10-153

QW — 482 VVPS NO: 229

REV NO:



ELECTRICAL CHARACTERISTICS ( QW — 409 ) Current AC or DC : See Table Polarity : See Table Amps (Range) : See Table Volts (Range) : See Table Tungsten Electrode Size and Type : Mode of Metal Transfer for GMAW: -- Electrode Wire feed speed Range :

TECHNIQUE (QW-410) String or Weave Bead Orifice or Gas Cup Size Initial and Interpass Cleaning Method of Back Gouging Oscillation : Contact Tube to work Distance Multiple or Single Pass (Per side) Multiple or Single Electrode Travel Speed (Range ) Peening Others

: Stringer & Weave Bead

: (Wire Brush, Chipping, Grinding ,etc. ) : Grinding • •

• •

• Multiple Pass • • Single

Weld Layers


Volt Range

Travel Speed Range

mm/Min.


Class Dia in

mm

Type Polarity

Amp. Range

Root SMAW E NiCrMo-4 2.50 DC-EP 60-80 22-28

Filler SMAW E NiCrMo-4 3.15 DC-EP 70-90 22-28

Cap SMAW E NiCrMo-4 4.00 DC-EP 90-120 22-28


FOR BHEL : BAP : RANIPET

N.BALAMURUGAN Dy. Manager/ Production / b'UTC/ H1

Date: 12-1,51 EL / BAP TWITPET - 632 406

Reviewed and Approved By Signature & Seal:

M.VALAVAN Dy.General Manager/ Production BHEL / SAP / RANIPET -632 406

Date: i 2- c4 1 mil-

Signature & Seal:

Date : 12.09.2019 PAGE 2 OF 2


Shielding: NA Trailing : --Backing : --



pmxhelpdesk.pser

Text Box



SCR- 3D VIEW &COMPONENTSSCR CAP ASSEMBLY

SCR RECTIFIER TRUSS

SCR REACTOR

SCR BOTTOM HOPPER

(Loading & Unloading side ofSCR is always read as SCR Front Side)



SCOPE OF WORK:

1. SCR system in total consists of SCR inlet duct, SCR reactor, SCR outlet duct.2. Scope of SCR reactor is shown.



Side View of SCR Reactor (as shared by BPE)



SCR PGMA MASTER LIST PICTORIAL

REPRESENTATIONPatratuNo of PGMAs = 64No of PGMA for Reactor = 57+1(SLB)No of PGMA for NH3 tank = 6

Other than Patratu ProjectNo of PGMAs = 35No of PGMA for Reactor = 28+1(SLB)No of PGMA for NH3 tank = 6

Total Tentative Tonnage = 750Mtons/SCR (Max)**Weight Ranges between 500 Mtons to 750 Mtons(depending on SCR configuration)

Full Model view of SCR reactor – STAAD Pro



WELDINGS ADOPTED IN SCR

• Seal weld must be done as per drawing. • All reactor modules to be of gas tight welded constructions.• 6mm dia Weep holes must be ensured in all the internal Box section

members. • Trial Assembly is Mandatory for all Modules within & between PGMAs

of SCR to ensure proper Field fit-up.



SECTION/PROFILES & MATERIALS INVOLVED IN SCR BOTTOM HOPPER

• Section/Profiles:• Wall Casing 6/8 mm thick plate Material as per customer specification or

IS2062E350BR/B0.• All Wall Stiffeners : ISMB 150, ISMC 200 & ISMC 250.• Wall Corner angles : ISA 100X100X10 & ISA 130X130X12.• Welded Box sections with plate thickness 10mm, 12mm, 16mm & 20mm,

Material as per customer specification or IS2062E350BR/B0.• All internal truss members : Pipes PIPE127*8

& PIPE168.3*7.11 Material as per customer specification or SA106 GR-B.



TENTATIVE TONNAGE & CONSIGNMENT SIZE FOR BOTTOM HOPPER

• The Tentative tonnage & consignment size as follows:• Any one of side wall – 10 Tons (Max)

• Width 3.5M X Depth 0.5M X Length 17M/sent in split• All 4 walls – 40Tons (Max)

• As per Layout Bottom Hopper Dimension• Internal Truss work – 20 Tons (Max)

• Box beam - WBOX 250 with Length 17M.• Pipe sections - 200 mm dia (Max) with Length 12M.



POWER SECTOR EASTERN REGION DJ-9/1, SECTOR-II, SALTLAKE CITY, KOLKATA - 700 091

(033) 23211960 033-2339 8000/ 2339 8236

ANNEXURE - 2

FORMAT FOR NO DEVIATION CERTIFICATE (To be submitted in the bidder's letter head)

BHARAT HEAVY ELECTRICALS LIMITED, Power Sector - Eastern Region, Plot no 9/1, DJ Block, Sector – II, Salt Lake City, Kolkata – 700 091

Sub No Deviation Certificate. Job ERECTION, TESTING, COMMISSIONING OF BOILER & AUXILIARIES INCLUDING

ESP,FGD & SCR OF 1 X 660 MW UNIT-5, SAGARDIGHI TPEP,W.B. Ref 1.0 Tender no : PSER:SCT:SDG-B2100:21.

2.0 BHEL's NIT, vide reference no. PSER:SCT:SDG-B2100:8486 Date: 25-02-2021. 3.0 BHEL’s TCN-01, vide reference no PSER:SCT: SDG-B2100:TCN-01 Date: 04-03-2021 4.0 BHEL’s TCN-02, vide reference no PSER:SCT: SDG-B2100:TCN-02 Date: 04-03-2021 5.0 All other pertinent issues till date.

Dear Sirs, With reference to above, this is to confirm that as per tender conditions, we have visited site before submission of our offer and noted the job content & site conditions etc. We also confirm that we have not changed/ modified the tender documents as appeared in the website/ issued by you and in case of such observance at any stage, it shall be treated as null and void. We hereby confirm that we have not taken any deviation from tender clauses together with other references as enumerated in the above referred NIT. We hereby confirm our unqualified acceptance to all terms & conditions, unqualified compliance to technical specification, integrity pact (if applicable) and acceptance to reverse auctioning process.

In the event of observance of any deviation in any part of our offer at a later date whether implicit or explicit, the deviations shall stand null & void. We confirm to have submitted/uploaded offer/documents in accordance with tender instructions with acceptance of the terms & conditions of the tender by us and as per aforesaid references. Thanking you,

Yours faithfully, (Signature, date & seal of authorized representative of the bidder)

sub tender change notice (tcn) - 02

Documents