NPCIL Response to Pre-Bid Queries on Tender No. CMM/FTP/10 … · 2017-01-06 · NPCIL Response to...

Query no.Name of the

Bidder

Tender Section/

Volume NameClause No./ Subject Description of Query NPCIL's Response

1 M/s LTSSHF 5.0 Chemical CompositionSi Specified is 0.15-0.30%.

We propose to keep it 0.30% Max.

Si of 0.30% max. is acceptable in case of forging made by VIC method.

For any other method of forging,Tender spcification requirement of Si

content shall be applicable.

2 M/s LTSSHF 5.0 Chemical CompositionIn case of Vacuum Ingot casting (VIC) route, we propose that

chemical composition shall be reported in product stage.

Ladle analysis report for ingot manufactured by VIC route shall be

submitted for reporting/ information purpose and product analysis

shall meet the tender specification requiement. For ingot

manufactured by other methods, Tender specification requirement

shall be applicable.

3 M/s LTSSHF 6.0 Heat Treatment We propose that Tempering temperature shall be between 640-

680°C instead of 650-680°C.Not acceptable. Tender conditions shall prevail.

4 M/s LTSSHF7.0 Mechanical Testing

Sub Clause 7.1 (1)

We propose for acceptance of the Drilling Qualification Block ,

based on the testing of the Tubesheet forging if it is made from

the same heat and heat treated in the same heat treatment batch

along with Tubesheet forging.

In case if Drilling Qualification Block is made from a different

heat or heat treated in a different batch, the sampling location

shall be in line with the sampling location requirement of

Tubesheet forging (80 mm x 80 mm)

Not acceptable i.e. testing of both drilling qualification block and

tubesheet is required to be done independently in all cases.

However, specimen location shall be in line with location of test

specimens of tubesheet i.e. 80mmX80mm.

1 M/s WILVolume II /

Section CTender drawings

Index, List of drawing indicate Revision of drawing as Rev. 1 for

all drawings whereas the drawings received with the tender are

of Revision R0 except for 11 Nos. drawings which are having

Rev.1.

NPCIL to confirm Revision of all drawings with copy of related

drawings.

Revision number mentioned in the tender drawings shall be followed.

2 M/s WIL

Volumn II /

Section C / PC-P-

977 (Technical

specification for

Inconel Cladding)

Clause No.8 for heat treatment

Heat treatment for qualification of Procedure, Performance and

Production test coupons does not call for any purging

requirement for inconel cladding. In this case, the top layer of

Inconel cladding of coupen will be machined to remove oxidation

layer. Please confirm.

Acceptable but purging shall be carried out on coupons having

cladding to be used for tube welding. However, for other coupons

(where cladding is not used for tube welding), it shall be ensured that

cladding thickness on various qualfiication coupons after removal of

oxidised layer is equal to corresponding job / drawing thickness.

3 M/s WIL

Volumn II /

Section C /

PP-P-1531

Specification for silver gasket

Specification for silver gasket (PP-P-1531) is mentioned in list of

specification provided but the specification is not uploaded with

the tender. Please provide the same.

Specification No. PP-M-1531 is uploaded.

4 M/s WIL

Volumn II /

Section C / PC-E-

1000

Annexure A / List of Applicable

specification and drawings

As indicated latest Edition of ASME B&PV code 2015 Edition shall

be followed and for balance standards, NPCIL to confirm edition

of codes & standards to be followed.

Edition of all applicable codes and standards existing on Tender sale

start date shall be followed.

Volume-II,

SECTION-C

SL No.2

:Technical

Specification for

Quenched &

Tempered Low

alloy

and other Carbon

steel Forgings for

700 Mwe

Projects

Specification No.:

PC-M-960 Rev-1

NPCIL Response to Pre-Bid Queries on Tender No. CMM/FTP/10-31-1-1158 for Steam Generators for GHAVP-1&2

Page 1 of 24


5 M/s WIL

Volumn II /

Section C / PC-E-

1000

5.4.2 / Mechanical Design &

Analysis

Design of SG & Handling of SG at site is in the scope NPCIL and

hence, the preparation of handling procedure for handling of SG

at site is in the scope of NPCIL. We will provide 1 No. Evener

beam to handle SG at site.

Clause 5.4.2 of Specification No. PC-E-1000 clearly explains the scope

of mechanical design and analysis. Preparation of Handling

Procedure for handling of SG at Site is in the scope of SG supplier as

clearly mentioned in the clause 5.4.2.

6 M/s WIL

Volumn II /

Section C / PC-E-

1000

Annexure A / All drawings

A note in all the tender drawing states that "There may be some

minor changes in this drawings".

Such changes shall be mutually discussed and impact of the same

on cost and time shall be discussed and arrived at wrt the time

and cost of PO.

Scope of design is clearly indicated in the tender. Any modification /

strengthening to meet the code compliance based on specified input

is in the scope of supplier and no extra cost shall be admissible.

7 M/s WIL

Volumn II /

Section C / PC-E-

1000

Clause 6.6

As per specification, after Hydro test, all pressure boundary welds

and critical base material areas on the primary and secondary

shall be subjected to surface examination by MT and / PT and

volumetric examination by UT.

We would like to clarify that after hydro test, only accessible

welds on pressure boundary can be tested by MT/PT and UT.

Please confirm.

Noted and acceptable

8 M/s WIL

Volumn II /

Section C / PC-E-

1000

Annexure A / GHAVP-

1&/33111/4005/DD

DIN 8570 standard is superseded by DIN 13920. We understand

that the latest standard (DIN 13920) is to be used. NPCIL to

confirm.

In case of obsolete standards, latest equivalent applicable standard

shall be followed with prior approval of NPCIL.

9 M/s WIL

Volumn II /

Section C / PC-M-

966, PC-M-968,

PC-M-969, PC-M-

970

Welding consumables

1) Welding consumables can be procured from reputed suppliers

meeting NPCIL specifications and hence, restriction on

procuremment of specific brands should not be imposed.

2) Obselete standards may be removed.

1) Noted and acceptable. However PO for welding consumable shall

be placed after approval of welding consumable manufacturer by

NPCIL.

2) In case of obsolete standards, latest equivalent applicable standard


10 M/s WIL

Volumn II /

Section C / PC-E-

981

Clause 3.0 : Material for

procedure qualification and

Batch qualification

Material meeting chemical and tensile properties should be

allowed to use for procedure qualification and batch

qualification.

Not acceptable

11 M/s WIL

Volumn II / Part C-

1 / Special

Instruction to

Tenderer

2.2: Material for fabricationProcurement of raw material to be allowed as per equivalent

international standards (ASME/ ASTM) instead of DIN standard.Not acceptable

12 M/s WIL

Volumn I /

Section A/

Appendix X,

Qualifying

criteria

Technical criteria 1.0 b

Handling facility up to 300 MT for maneuvering of such heavy

equipment / subassemblies in fabrication / machining / NDE

shops etc.

The max dry weight of SG is 215 MT. With this handling capacity

of 250 MT (instead of 300 MT) is sufficient considering weight of

fixtures attached with SG. Kindly confirm.

Not acceptable

Page 2 of 24


13 M/s WIL

Volumn I /

Section A /

Invitation to

Tender

ITT clause No. 9.2.3

In event of denial / non-availability of fiscal concession for GHAVP

1 & 2 project, NPCIL will refund full custom duty (import of

material) and Excise duty (final product) at actual. NPCIL to

cnfirm.

Tender clause is self explanatory and continue to prevail.

14 M/s WILVolumn I /

Section B2 / SSCClause No. 3.0 (a to k)

We propse following payment terms-

a)10% on unconditional acceptance of PO

b) 5% on completion of mechanical design & Analysis of all SGs

c) 5% on placement of PO for Forgings like Tube Sheet, Shells,

Heads and Nozzles for all SGs

d) 5% on placement of PO for Incoloy-800 U-tubes for all SGs

e) 5% on pro-rata basis on receipt of Forgings like Tube Sheet,

Shells, Heads and Nozzles

f) 5% on pro-rata basis on receipt of Incoloy-800 U- tubes

g) 10% on completion of SA-11

h) 5% on completion of SA-21

i) 5% on completion of SA-32 and receipt at Site of Vertical

Supports, Top Guide Supports and Bottom Snubber Supports

j) 5% on completion of SA-10 and SA-34

k) 30% on at site

l) 10% on final acceptance

Not acceptable

15 M/s WILNIT / Portal

information

Last date and time for On line

bid submission

Due to Chrismas & New year holidays in foreign countries,

difficult to get offers for raw material and welding consumables

from overseas suppliers in the available time. In view of this, we

request NPCIL to extend bid submission date to 15th Feb'2017,

Not acceptable currently.

1 M/s BHEL

Section A /Vol I

Invitation to

Tender

ITT Clause no:2.6 (d) and (h)

Validity of Integrity Pact Bank

Guarantee

We understand that the validity of 5 years of Integrity Pact Bank

Guarantee starts from the original bid submission date i.e.

12.01.2017 and it shall not change in case of any

change/extension in the Bid submission date.

While submitting the bid, Contractor shall consider validity of the

IPBG for 5 Years from the date of its issuance to start with. However,

Contractor will be required to extend the Integrity Pact Bank

Guarantee, as and when required by the Purchaser.

2 M/s BHEL

Section A /Vol I

Invitation to

Tender

ITT Clause no:14/ Validity of

Bids

The validity of Bid is kept for a period of 120 (One Hundred and

Twenty) days from opening of part II bid. In view of the price

fluctuation in market and our past experience about long gap

between part I bid opening and part II bid opening, we request

NPCIL to keep this as 120 days from Part I bid opening.

Request not acceptable. Tender conditions shall prevail.

Page 3 of 24


3 M/s BHEL

Appendix-IP

Pre Contract

Integrity Pact

Article-6/ Fall Clause

The Contractor undertakes that

it has not supplied/is not

supplying …

The price of any particular product/systems or subsystems

depend on a lot of factors viz market environment, Input

cost/procurement cost (viz raw material, & component cost),

subcontracting cost, tender requirements (viz specification,

delivery schedule) by any Purchaser, type of Purchaser (Nuclear,

Thermal, Hydro, Defence) etc. As these conditions/requirements

can vary from time to time, the prices for even two contracts of

the same Product for same Purchaser (like NPCIL) may vary.

Further, the prices are strategically decided based on

competitiveness in the market.

We have never come across this clause in tenders of any other

PSU customers.We request you to delete this condition

Request not acceptable. Tender conditions shall prevail.

4 M/s BHEL

SPECIAL

CONDITIONS OF

CONTRACT

SCC No. 3.0 Terms of Payment

(i) Nil Advance

(ii) 50% as Progress Payment on

completion of different

milestones.

(iii) 40% of ex-works prices of

Steam Generators …….after

safe

transportation & upon receipt

of SG at site

(iv) Balance 10% of ex-works

prices of each Steam

Generators shall be released

on receipt of Final

Documentation and acceptance

of each SG

NPCIL is requested to consider the followings:

i) 10% of ex works prices of Steam Generator as initial advance on

acceptance of Purchase Order in place of nil advance.

(ii)50% as Progress Payment on completion of different

milestones.

ii) 30% of ex works price of Steam Generatorson pro rata basis on

despatch in place.

(iii) Balance 10% of ex-works prices of each Steam Generators

shall be released on receipt of each Steam Generator with Final

Documentation and acceptance of each SG.

Tender conditions shall prevail.

Page 4 of 24


5 M/s BHEL

Part- C1 / Special

Instruction to

Tenderer

Clause No.: 3.2.3

As per tender, the contractor shall submit to the Purchaser for

approval, three (3) copies each of documents & drawings. In

addition the drawings shall also be submitted in soft form i.e.

Autocad drawings for information.

BHEL request NPCIL to waive off the Auto CAD drawing

requirement.


6 M/s BHEL

Part- C1 / Special

Instruction to

Tenderer

ANNEXURE - 2

List of Drawings

NPCIL is request to provide the following drawings as listed in the

FIM list which are not attached in the tender. 04 - SK - 6372, 04-

SK - 6373, 04 - SK - 6375, NPC/33111/0501/DD,

NPC/33111/0503/DD, NPC/33111/0504/DD,

NPC/33111/0505/DD, NPC/33111/0506/DD,

NPC/33111/0507/DD, NPC/33111/0508/DD &

NPC/33111/0502/DD.

Drawings are uploaded.

7 M/s BHEL

Part- C1 / Special

Instruction to

Tenderer

Clause no.: 3.2.1

As per this clause of tender, the contractor shall also submit two

sets of soft copies of all finite element analysis model files

(including all database files) including special programmes,

macros, if any, used in the analysis.

Since, the entire analysis will be done in association with NPCIL,

the above requirements can be waived off.


8 M/s BHEL

4 PART-C-I -

Special

Instruction to

Tenderer

After placement of the order :

3.3.2

Submission of one set of all approved fabrication Drawing in

Electronic form:

Since, Four set of hard copy drawings will be submitted for NPCIL

documentation, this requirement may be waived off.


9 M/s BHEL PC-M-967 Clause no.: 4.5.2

As per tender, the acceptance limit for mechanical test of Inconel

cladding strips shall be as per DIN 1736 Part-II, Material

No.2.4806.

Since, this Standard is superseded by BS EN ISO 18274 : 2010,

BHEL requested to NPCIL indicate the latest standard.



10 M/s BHEL -- --

Silver Gasket specification for Hand hole cover assembly, Primary

& Secondary nozzle assembly is not attached in the tender. BHEL

asked to provide the same.

Specification No. PP-M-1531 is uploaded.

Page 5 of 24


11 M/s BHEL

Technical

Specification /PC-

E-1000

Annexure-C, C.3.1 / General

Design requirement of SG

Performance analysis of Moisture separator:

Since, thermo hydraulic performance of these SGs is same as

KAPP-3 & RAPP-7, we will use the same typer Drier.

Hence, the performance Analysis of Moister Separator may be

waived off.


12 M/s BHEL

Technical

Specification /PC-

E-1000

Annexure-C /Note.

As per tender, the spectra provided here are representative

values. The final response spectra will be provided to successful

bidder at an appropriate stage.

We request to NPCIL to provide the same immediately after

placement of order. This will help to complete the Seismic

Analysis at earliest and release the stage payment.

Response spectra is uploaded.

13 M/s BHEL

Technical

Specification /PC-

E-1000

Annexure-C, C.5 - f / Analysis

Since, there is no change in the thermo hydraulic performance

conditions of SGs, analysis of SG internals for postulated failure

conditions (MSLB, FWLB) may be waived off.


14 M/s BHEL

Technical

Specification /PC-

E-1000

Annexure-A / List of applicable

codes, Standards

For ASME B&PV Code we will follow 2015 Edition which is the

latest. For other codes & standards such as ASTM,TEMA,

DIN/KTA, TRD

Technical Rules for Steam Boilers latest Edition is not indicated.

NPCIL may confirm the same.

Edition of all applicable codes and standards existing on Tender sale

start date shall be followed.

15 M/s BHEL

Technical

Specification /PC-

E-1000

5.4.2 / Mechanical Design &

Analysis

Since, the final fabrication drawing of SG Trolley, Bottom snubber

support, Vertical hanger rods assembly, Girder support and SG

Top guide support are provided in the tender, same will taken for

fabriaction of these items without any further design.



16 M/s BHEL

Technical

specification for

Steam Generator

& Its Sub

Assemblies of

PHWR 700MWe

PC-P-994 /5.2.1 : Tolerance &

Surface finish

As per specification, if the tolerances are not specified in

drawings, free size tolerances according to MEAN-DIN7168 shall

be applied to all dimensions, however in all tender drawings

general tolerance indicated as IS:2102-m.

NPCIL may confirm, IS:2102-m can be used in place of MEAN-

DIN7168 .

IS:2102-m shall be used.

Page 6 of 24


17 M/s BHELVol III/Spec. PC-E-

1000

Annexure A (GHVAR-

1&2/33111/4197 / DD)

Whether, the increase in tubesheet thickness from 420 to

440mm to be included in primary side or secondary side.


With revised thickness of tubesheet, the distance of the lug top face

from secondary side of the tubesheet shall change from 123.3 mm to

143.3 mm.


1000

Annexure A (GHVAR-

1&2/33111/4061/DD)

It is proposed to shift the feed water header elevation, since 3D

thermo hydraulics is not asked for.

NPCIL to indicate the new location.


19 M/s BHEL

Not indicated in

Tender

documents

----

% of U-tube plugging:

% of U-tube plugging during fabrication not indicated in Tender

Document.

U-tube plugging is not envisaged during fabrication of SG. However,

in exceptional case, if allowed by NPCIL, it will attract a reduction in

the price of the SG which is calculated at price of total length of the

plugged tube multiplied by three or Rs. 3.0 lakhs per plugged tube,

whichever is higher. The unit rate applicable herein shall be as

quoted / agreed by the same bidder towards supply of tubes under

his Option-II bid.

20 M/s BHELSpec. No.: PC-E-

1000Annexure-C / C.5 Analysis

Stress analysis for the following components will be performed

for Tube sheet, feed water nozzle, steam outlet nozzle, primary

inlet and outlet nozzles, support lugs , Manhole nozzles, Hand

Hole Nozzles and PDHRS nozzle.




1000

Clause No.: 5.4.2 /Mechanical

design & Analysis

Handling of SG at site is in NPCIL scope. Hence procedure for

handling the SG at site may be prepared by NPCIL as was done for

KAPP-3 order.

Evener Beam to handle SG in vertical position will be provided by

BHEL.



1000


design & Analysis

For Saddle Supports, Secondary Side Attachment , Evener Beam

for vertical lifting arrangements only mechanical design

calculation will be submitted.




1000


design & Analysis

Load test will done for SG handling arrangements (Secondary Side

Attachments and Evener Beam) alone as indicated in tender

drawings.


Load test shall be carried out for SG handling arrangemets i.e.

Secondary Side Attachment, Evener Beam and SG Trolley.

Page 7 of 24


24 M/s BHEL

Not indicated in

Tender

documents

----

In KAPP-3 & RAPP-7 SG, some of DIN materials are substituted for

ASME material. Whether same substitute can be used in this

Tender also.


Not acceptable

Bidder may please note the following requirements for various

instrumentation nozzles to be provided in SG.

1. Downcomer Temperature Measurement:

a) Each SG shall be provided with four no. of one inch nozzles and

suitable thermowell symmetrically located in the down comer region.

b) Bidder shall submit the design of thermowell and submit for NPCIL

review and approval.

c) Bidder shall be responsible for all the test as specified in the

general specification of thermowell (specification will be provided to

the successful bidder)

2. Downcomer Flow Measurement:

a) Bidder shall supply, test and install four averaging pitot tubes in

one of the steam generator out of four SGs.

b) Bidder shall comply with the NPCIL specification (specification will

be provided to the successful bidder).

c) Bidder shall provide a suitable nozzles on the Steam Generator to

match the installation requirements of the averaging Pitot tube being

supplied.

3. SG Level Measurement:

a) Each SG shall be provided with ten nos. of one inch nozzles in

steam space (SA-13). Each nozzle should preferably be at the same

elevation. If due to some design constraint, it is not possible to locate

all nozzles at the same elevation then, bidder shall obtain prior

approval of NPCIL before fabrication.

b) Each SG shall be provided with three nos. of one inch nozzles in

As per tender drawing, the Velocity & Temperature measurement

Nozzles are removed.

NPCIL may confirm.

Drg. No: GHVAP-

1&2/33111/4064/DD)

Vol III/Spec. PC-E-

1000M/s BHEL25

Page 8 of 24



1000All tender drawings

A note in all tender drawings state that, "There may be some

minor changes in this drawing".

Whether changes will be finalised before PO. If not it will have

commercial implication.

Tender conditions shall prevail and there will not be any commercial

implication applicable.

27 M/s BHEL

Not indicated in

Tender

documents

----

Hanger rod material specification is not provided along with the

tender.

Whether ASTM/ASME specification can be used for Hanger Rod

material procurement.

Hanger Rod material specification is mentioned in the tender

drawing.


1000

Annexure A (GHAPV-

1&2/33111/4001/DD)

As per SA-10 tender drawing in note no : 29, thickness of divider

plate (30mm) may be increased if required. If thickness is

increased, the volume hold-up at primary side will be reduced

and also thermal hydraulic design is already completed.

Hence NPCIL may clarify on increase of thickness.

Small change in thickness of divider plate will not affect the thermal

hydraulic design . Supplier shall suitably decide increase in thickness

of divider plate subject to approval by NPCIL.


1000

Drg.No.: GHVAR-

1&2/33111/4067/ DD/R00)

As per tender documents, the metallic bellows are replaced by

suitable arrangements. NPCIL may confirm , whether it is a

sliding type joint or any other type of joint?. If sliding type joint,

NPCIL may confirm the allowable expansion to design the axial

movement sliding type joint.

Suitable alternate arrangment shall be provided by the supplier for

the approval of NPCIL.

b) Each SG shall be provided with three nos. of one inch nozzles in

water space (SA-12) for narrow range level measurement. Each

nozzle shall be at the same elevation.

c) Each SG shall be provided with seven nos. of one inch nozzles

above the tube sheet in water region (SA-11) for wide range level

measurement. Each nozzle shall be at the same elevation.

4. Bidder shall supply 20% of total supply quantity or 2 nos.

whichever is higher as mandatory spare averaging Pitot Tubes and

thermo wells.

5. General: The location and elevation of the instrumentation nozzles

is given in the tender document is tentative. Successful bidder shall

obtain prior approval of NPCIL on the proposed location and

elevation of these nozzles.

Page 9 of 24



1000

Piping details for Seismic analysis is not given in tender.

Hence NPCIL may share the piping details for this analysis.

Suitable inputs are uploaded.


1000GHAVP 1&2/33111/4005/DD

General tolerance for welding: DIN 8570 is superseded by DIN EN

ISO 13920 (1996-11). So, kindly clarify whether we can follow the

latest standard DIN 13920 for the GHAVP project.




1000Annexure-B / Table-1

For Hydro testing, as per tender maximum pressure at primary

side is 157.5kg/cm^2 whereas, in KAPP & RAPP project, the

maximum hyrotest pressure is 165.7kg/cm^2.

NPCIL confirm the same.

Primary side hydro-test shall be carried out at minimum pressure of

157.5kg/cm^2(g).

33 M/s BHEL

Not indicated in

Tender

documents

----

Design & Hydro test pressure for design of Tube sheet not given

in Tender document.

NPCIL may confirm that, the Design & Hydro test pressure used in

KAPP-3 700 MWe can be extended for this project also.

The differential pressure across the tubesheet shall be taken as 82

kg/cm^2 at operating conditions.

34 M/s BHELSpec. No.: PC-M-

971Clause No.: 7.4 / Sealing Disc

As per Sealing disc specification, the flatness of cam profile at

back side is indicated as 01.mm instead of 0.1mm.

NPCIL may confirm, whether, it is 01mm or 0.1mm?

NPCIL confirms that flatness is 0.1 mm as indicated in the tender

drawing.

35 M/s BHELSpec. No.: PC-M-

972Clause no.: 7.2 / Sealing Disc

As per tender, the dimensional deviations may be according to

DIN 7168-m. This standard is supersededby DIN ISO 2768-1.




36 M/s BHEL

Volume -.I

General condn.

of contract

Sec-B- Page

43/54

10.1.2

QA manual, which shall be finally accepted by the Purchaser after

discussions before commencement of work.

No customer approval is envisaged for company Manual / Ref.

documents /standards. However extract of quality program shall

be given.


37 M/s BHEL PC-M-962 5.3

In flare test outside dia. Increased by 20%

As per code ASME B-163 tube dia increased by 30%

As per ASME B-163, during flare test, tube O.D. shall be increased by

30%.

Page 10 of 24


38 M/s BHEL

Volume -III

PC-M-964 Q&T

LAS plates-

Fig. 3 & 5

page 19&21

Through thickness tensile test specimen from normal direction on

rolled plate.

Through thickness tensile testing is not required in the normal

direction for the thickness less than 70mm. This was accepted by

NPCIL at forged plate procurement for 700MWe.


39 M/s BHELVolume II

PC-M-960

Extent of Test for Forged plates and Test coupons (PTC, FTC, RTC)

are to be provided.

Extent of Tests for Forged plates and Test coupons shall be same as

that of STC-A of tubesheet for bottom of the ingot and that of STC-B

of tubesheet for top of the ingot and that of RTC-D of tubesheet for

bottom of the ingot. STC-A and STC-B are for STC coupons of the plate

and RTC-D is for RTC coupons of the plate.

40 M/s BHEL Volume II Sec-C 2.2.2Requested to provide list of approved third party inspection

agencies for Indigenous and Import materials procurement.Tender conditions shall prevail.

41 M/s BHEL GeneralRequest NPCIL to permit BHEL approved inspection agencies to

inspect Indigenous materials instead of BHEL QC.Tender conditions shall prevail.

42 M/s BHEL GeneralObsolete DIN standards required to be replaced by ASME/EN

standards and acceptance should be as per ASME/EN standards.



43 M/s BHEL General Inconel is a Trade name. Instead Nickel-alloy-xxx to be adopted.

INCONEL 600 shall be read as Nickel-Chromium-Iron UNS no. 6600,

Incolloy 800 shall be read as Nickel-Chromium-Iron UNS no. 8800,

inconel 690 shall be read as Nickel-Iron-Chromium UNS no. 6690

44 M/s BHELVolume I Section

B2Clause 4.0 (page 6)

-Avoid sourcing from US as end user certificates is required. Can

Material from China be procured?Tender conditions shall prevail.

45 M/s BHELRequest to provide NPCIL Approved vendor list to be provided for

all the materials/consumables. Tender conditions shall prevail.

46 M/s BHELRequest to provide List of NPCIL approved labs to be provided for

testing.Successful bidders will be provided the list.

47 M/s BHELFor certain materials due to less quantity, Items demanding MOQ

to be supplied as FIM.Not acceptable

48 M/s BHEL Part C1 2.2.1 (D)FIMs will not be tested by BHEL. Since estimate cannot be

submitted along with price bid.

Not acceptable and tender conditions shall prevail. However, the

bidders can inspect the FIM at the place of storage, if required.

49 M/s BHEL Propriety certificate has to be provided wherever applicable. Not applicable

50 M/s BHELProject authority certificate has to be provided on demand

wherever applicable.Tender conditions shall prevail.

Page 11 of 24


51 M/s BHEL Page 10/35 Part C1-2.2 Material for fabrication: E1 Notes 6.0 Supplier awarded option II,

which includes tubes as FIM, to be given extra time for delivery.Not acceptable. Tender conditions shall prevail.

52 M/s BHEL 2.2.1

If pittings are noticed and are to be removed, time taken to clear

the job to be accounted (Mainly in case of plates and shells) Any

defect rectifications on FIM will attract commercial implications.

The same will be applicable for tubes also. 2. Sizes of plates not

available in Annexure -2. Requested to provide.

1. Not acceptable. Tender conditions shall prevail. 2. Plates

are of various sizes ranging from 4 mtr. to 6 mtr. in length and around

2 mtr. In width.

53 M/s BHEL 2.6Approved QAP instead of suggestive QAP, is necessary for the

further generation of documents. Tender conditions shall prevail.

54 M/s BHEL 3.2.1Clarification regarding additional procedures requirement as

given like a,b,c etcTender conditions shall prevail.

55 M/s BHEL

PC-M-970 Cl 3.1,

3.2 , 4.0, 4,1.2,

PC-M-966 CL 3.2,

4.1 ;

PC-M-968, Cl 3.2,

4.1, PC-M-969

Cl. 3,0 & 4.0

Welding consumable

DIN 1736 is obsolete standard

Obsolete standards to be replaced by latest standards.

Brand name needs to be replaced by standard names.



56 M/s BHEL

PC-M-970 Cl 3.4;

PC-M-967, Cl

3.14, cl. 4.1.5 PC-

M-966 Cl 3.4

Certification of consumable to DIN 10204-3.1b

Clause 3.1b is to be replaced with 3.1.

Agreed and clause 3.1b shall be replaced with 3.1

57 M/s BHEL PC-M-970 Cl 5.4

Moisture content

It shall be corrected as diffusible hydrogen.

Acceptable.However, moisture content test shall also be carried out

and meet te requirement of ASME -sec II- Part C.

58 M/s BHELPC-M- 966

Cl 4.1, 7.0

Technical specification for

Inconel bare welding rod

Chemical composition of welding rod , mechanical properties

To be removed; ASME sec IIC , standard SFA 5.14 can be

specified; Grade ER NiCr 3.Mechanical properties are not required

as per standard.

Not acceptable

Page 12 of 24


59 M/s BHEL

PC-M-967

cl 3.12, 3.2;

4.1.4,4.3.1

Technical specification for

Inconel strip and flux for SAW

DIN1736 obsolete standard

To be removed;

ASME sec IIC , standard SFA 5.14 can be specified; Strip shall

meet the requirements of Grade EQ NiCr 3.

Tensile strength, Yield strength

Not specified in ASME/EN standard.

Cl4.1.1 Flux brand name mentioned

To be corrected as suitable flux

Not acceptable. Tender conditions shall prevail. However acceprance

limits for UTS and YS shall be taken as 550 N/mm^2 minimum and

292 N/mm^2 minimum respectively.

60 M/s BHEL 3.2.1

PC-M-969

Bare ferrtitic electrode and flux

for SAW

Chemical composition of wire, Weld metal composition

The composition of wire shall be to the grade EF3 of table 3 in

Sec IIC SFA 5.23.The wire and flux shall confirm to F9A8-F9P8-EF3

as per ASME SFA 5.23. weld metal composition shall be to F3 as

per SFA 5.23

Not acceptable. Tender specification to be followed

61 M/s BHEL Cl 3.1.2, Cl 4.1.2

Technical delivery condition & Flux classification

Obsolete standard ; to be removed

Tender conditions shall prevail. In case of obsolete standards, latest

equivalent applicable standard shall be followed with prior approval

of NPCIL.

62 M/s BHEL PC-M-977Welding , examination &

testing of Inconel cladding

Scope

AD Mark blatter requirements not applicable

Clad metal tensile properties- 7.0

It is not specified in the standard.

Welding material test 9.0

VDTU & KTA reference can be removed

Welding procedure qualification- 10.0

Qualified position shall be as per ASME.

Cl10.4.3.5

Magnetic particle test is not applicable.

Tender conditions shall prevail. In case of obsolete standards, latest

equivalent applicable standard shall be followed with prior approval

of NPCIL.

Page 13 of 24


63 M/s BHEL PC-M-981Welding , examination &

testing of ferritic steel welds

Base metal for consumable testing

If the mill test certificate is available, base material need not be

tested; If mill TC is not available, grade verification for chemical

and tensile properties is adequate.

Test coupon cladding & testing to be restricted to SAW or

predominant welding process.

Not acceptable and tender conditions shall prevail.

64 M/s BHEL PC-M-972

Clause 3.0 (f) Cu coated Filler electrode.

Clause 1.1 (iv) specifies about cooper coated electrode.

Non cooper coated recommended.

PC-M-969 specifies copper coated electrode to be clarified.


1 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

All clauses of

PC-M-966

Technical specification for Inconel bare welding rods

'- We understand that this specification is applicable to filler wire

used for tube to tube sheet welding only

This is a general specfication which can be used for Tube to Tube

sheet welding also.

2 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

7.0 of PC-M-968

Chemical & Mechanical Tests

'- We understand that this specification is applicable for cladding

only & charpy - V test is not applicable. Kindly confirm our

understanding.

This is a general specification for procuring welding consumables and

all requirements of tender specification shall be met.

3 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

3.1 of PC-P-977

Only SMAW & SAW can be adopted for cladding

We propose to include following

- GTAW (this process was a part of PB-P180.Refer clause 2.1 of PB-

P-180)

- Hot wire GTAW

Kindly confirm.

Not acceptable. Please refer para 5.6.4 of Specification PC-E-1000.

4 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

7.2 of PC-P-977

Chemical composition of cladding

We understand that requirement specified for automatic SAW &

Hot wire TIG is also applicable to Conventional GTAW

(Manual/Mechanized). Kindly confirm.


5 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

7.0 of PC-P-977

Chemical Composition & Mechanical Properties

We understand that this clause is also applicable to GTAW & Hot

wire TIG. Kindly confirm.


Page 14 of 24


6 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

7.4 of PC-P-977

Mechanical properties

We propose to change acceptance standard of UTS & YS as below

based on results of 220, 500 & 700 MWe steam generators.

- Tensile Strength : Minimum 550 N/mm2 , Yield strength (0.2 %)

: Minimum 250 N/mm2. Kindly confirm

Not acceptable. Tender conditions shall prevail. However acceprance

limits for UTS and YS shall be taken as 550 N/mm^2 minimum and

292 N/mm^2 minimum respectively.

7 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

8.4/11.2 of PC-P-977

Heat-treatment for welder/welding operator qualification

We propose to waive off PWHT of coupons for welder/welding

operator qualification. We intent to follow ASME Section IX.

Kindly confirm.

Not acceptable

8 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

5.3.6 & 5.3.7 of PC-P-984

Quality Control Block

As per practice followed in 700 MWe Steam Generators (KAPP-

3&4,RAPP-7&8) , the quality control welds will be maintained

atleast 5 % of the production weld & after 200 welds new QC

block will be welded. Kindly confirm.

Not acceptable. However, additional weld joints mentioned in the

specification as 20 nos. can be considered as 50 nos. subject to

quality assessment and clearance by NPCIL QS.

9 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

All Technical Specification

HT Cycle for simulated test coupon ( PQR, Consumables

Qualification, PTC & Base material coupon)

As an alternative to present HT cycle ( Stabilization of 40 Hrs. at

550 ⁰ C followed by 3 cycle of 8 Hrs. at 590-610 ⁰ C) , we propose

following cycle

- Stabilization of 40 Hrs. at 550 ⁰ C followed by 1 cycle of 24 Hrs.

at 590-610 ⁰ C

Kindly confirm.

Not aceptable

10 M/s L&T

Part - C - II /

Volume-II (

Technical

Specification)

4.0 of PC-P-994

Materials & Welding Consumables

Welding consumables will be procured as per L&T specification

from NPCIL approved Indian supplier/ reputed international

supplier. However, before use on job, these consumables shall be

qualified as per the respective NPCIL specification. Kindly confirm.

Acceptable

11 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-E-1000

6.6

All pressure welds and critical surfaces shall be PT/MT and UT

tested after hydrotest.

NDE after hydrotest shall be done only for all accessible weld

seams for establishing base line data for ISI.

Noted and NDE after hydrotest shall be done for all accessible weld

areas.

Page 15 of 24


12 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-M-961Clause 8.1. Para 2.

Plates for 6mm & above shall be subjected to straight beam &

angle beam examination in transverse direction on both the

surfaces to cover 100% of the volume.

Please clarify , acceptance Quality class for Straight beam

scanning. Also specify the reference standard , acceptance criteria

for angle beam scanning.

Most stringent requirement of product specification shall be

followed.

13 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-M-962

Clause no. 6.5

OD & Wall thickness over the entire length of each tube shall be

measured ultrasonically and reported.

We understand that wall thickness is to be measured

ultrasonically while OD has to be measured using micrometer.

Kindly confirm.

Agreed

14 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-978

Clause no.5

Trained , qualified and certified persons as a Level-II/III in

acoordance with IS13805 or ISO9712-3 shall be employed for UT

examination on the job.

Kindly add SNT -TC-1A. It is alreday mentioned in specification PC-

P-990,clause 9.0.

Acceptable

15 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-990

Clause no. 6.2.3

Para 3 & 4 : Tandem examination of welds

Please clarify on tandem examination in terms of reference

standard for calibration & acceptance criteria. Please speicfy also

when it is required(for more than 100mm thickness).

Tender specification shall be followed.

16 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-990

Table-2, Legend-1

Acceptance limits for Ultrasonic Indications: Indication found by

staright beam scanning shall be evaluated in accordance with

Table, taking into account the result of the examination before

welding.

Pl specify the Acceptance Limits for Angle beam scanning.

Tender specification shall be followed.

Page 16 of 24


17 M/s L&T

Part - C - I /

Volume-II 2.1

Bidders may note that any procedure, which was submitted by

them and approved by NPCIL for Steam generators of earlier

Projects, may be used with the permission of the purchaser,

without the need of resubmission/approval

We propose to further clarify the same as All qualified PQRs,

Procedures, operators, suppliers, vendors, toolings, methods,

machines, and approved QAP's , procedures, LTFPS, LTTS,

documents used in earlier SG work orders can be used as it is. Re-

approval of the same is not required (all such documents shall be

used with new purchase order no. stamped on Cover Page).

Not acceptable. Tender conditions shall prevail.

18 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-9825.3;5.5

The assembly shall be kept immersed in the bath for 7-8 hours at

working temperature of 80° C.

We propose the assembly shall be kept immersed in the bath for

30 minutes at working temperature of 80° C Min.


19 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-982

5.9.2

The assembly shall be maintained in the bath in vertical position

with the tube sheet side at the bottom. Conservation time is one

hour at working temperature of 80+/- 5° C.

We propose the assembly shall be maintained in the bath in

vertical position with the tube sheet side at the bottom.

Conservation time is 30 minutes at working temperature of 80° C

Min.


20 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-M-976

4

Material shall be supplied in Finally "Thermally Treated (TT)"

We propose to use Incoloy 800 as an alternate to Inconel 600 TT

for plugs of TTS

Not acceptable. Only Inconel 690 TT shall be used for plugs.

21 M/s L&TAnnexure-A

DrawingsAll drawings

CTQ dimensions shall be specified in Drgs. that shall be measured

and deviation of any, NCR shall be made. Other Dimensions to be

measuresd & recorded.


Page 17 of 24


22 M/s L&T

Part - C - I /

Volume-II 3.2.6

Any non-conformaity observed shall be immediately reported to

purchaser and shall be regularised through NCR within one

month of resolution of deviation

We propose that Principal acceptance for all deviations shall be

obtained within 1 month. Corresponding NCR/DCRs for

permanent deviation shall be closed before HPT.

Not acceptable. Tender conditions shall be prevail.

23 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-982

PC-P-983

5.2

5.1

Use of Demineralised water

We understand that DM water requirements for all applications

other than Hydostatic Pressure Test shall be as follows:

1. Chloride and sulphate </= 25ppm

2. pH - 6.5 to 9

3. Sp. Conductivity < /=10 micro siemens per cm

Acceptable but pH of DM water shall be maintained in the range of 7

to 9.

24 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-980

5.2.2

Steady value

We understand that during HLT, if a reading is steady for 2

minutes, it shall be considered as steady.

Not acceptable

25 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-982

3.5.2

The surface finish shall be tested with an instrument at the

inconel region and at 40 mm away from the ends of the hole,

over a length of 15 mm and also at the centre.

We propose that Surface Roughness inspection requirement of

Tube hole at centre location to be removed

Acceptable for job item However, for Drilling Qualification Block,

specification requirement shall be applicable on sample basis.

26 M/s L&T

Part - C - I /

Volume-II 2.2.1b

Inspection of U tubes shall be completed within 6 months in DFE

of placement of order.

We understand that only visual inspection is to be carried out.

All tube including spare tubes shall be inspected by visual, boroscopic

examination and eddy current examination. During examination, if

any additional work is to be carried out for acceptance of tubes, it is

in the scope of bidder and no extra cost will be admissible and there

will be no commercial implication to NPCIL.

27 M/s L&T

Part - C - I /

Volume-II 2.2.4

The contractor shall carry out visual examination on all FIM as

soon as received. Inspection report shall be sent to NPCIL within 1

week from the date of receipt of material, clearly bringing out

discrepancies / damages, if any.

Inspection report will be submitted in mutually agreed duration

upon order placement. Kindly confirm.

Not acceptable

Page 18 of 24


28 M/s L&T

Part - C - I /

Volume-II 3.2.10

All the inspectors and NDE personnel shall be duly qualified prior

to deploying on job.

We propose to continue the methodology followed in KAPP 3,4 &

RAPP 7,8 SGs

Not aceptable

29 M/s L&T

Part - C - I /

Volume-II 7

Contractor shall carry out inspection themselves for orders placed

on sub-contractor (no sub-contracting or representative for

inspection on behalf of contractor will be allowed) in addition to

the inspection carried out by sub-contractor.


RAPP 7,8 SGs

Not acceptable

30 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-982

3.5.2

4.4.2

4.4.3

- The holes shall be visually inspected with boroscope for

freedom from any longitudinal scratch. The surface finish shall be

tested with an instrument at the inconel region and at 40mm

away from the ends of the hole, over a length of 15mm and also

at the center.

- The holes produced shall be checked by the operator by a go-no-

go bar gauge for hole size and no-go gauge for front and rear

ligament as the drilling process on.

- The characteristics specified in 4.4.1 shall be inspected after

completion of the entire drilling and cleaning of the holes and

assembly.

- Surface finish cannot be measured at center of DQB

- We understand that holes other than 1% will be checked only by

machine operator by go/no-go gauge

- The characteristics specified in 4.4.1 shall be measured on

machine prior to assembly cleaning.

Acceptable for job item However, for Drilling Qualification Block,

specification requirement shall be applicable on sample basis.

Page 19 of 24


31 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-995

4.0

6.0

Purchaser/AA reserves the right to participation. Where

Purchaser/AA has promised active participation in tests and

examinations, but did not appear on place, production may only

be continued if examination has been performed in accordance

with the OPS. Results shall be evaluated by M and P/AA.

The manufacturer shall inform Purchaser and/or Authorized

inspection agency (AA) about the readiness of stage test or

examination well in advance (at least 15 days)

We understand that if the job is ready for A2 inspection but

Purchaser/AA is not available at that point in time, production

may be continued in accordance with OPS without waiting for

inspector.

We understand advance notification is required only at work

centers where resident surveyor is not posted. We propose

advance intimation of 3 days for the same.

Not aceptable. Tender conditions shall prevail.

32 M/s L&T

Part - C - II /

Volume-II

(Technical

Specification)

PC-P-994

5.2.6

5.2.7

Entire clause


RAPP 7,8 SGs


33 M/s L&T

Part - C - I /

Volume-II

(Special

Instruction to

Tenderer)

1

Testing of Free Issue material

Quantum of Free issue to be Tested


34 M/s L&T

Part - C - I /

Volume-II

(Special

Instruction to

Tenderer)

2

Documents and Drawings

Note: Additional Changes - Can this be at extra cost

Not acceptable

35 M/s L&T

Part - C - I /

Volume-II

(Special

Instruction to

Tenderer)

2.2.1 b)

Procurement of Incoloy 800 Tubes

NPCIL to give some indication of the probable qty. While quoting

we quote unit rate but while buying we may need MOQ

quantities.

Not acceptable

Page 20 of 24


36 M/s L&T

Part - C - I /

Volume-II

(Special

Instruction to

Tenderer)

2.2.1 d)

Inspection of material on missing Test certificates

Request NPCIL to quantify the qty of material to be inspected. Is

this 100% inspection or sample inspection. What if the material is

rejected.


37 M/s L&T GCC 5.4.3 a)

Price Adjustment Ceiling

We propose to have Ceiling of +/- 30% instead of 20%


Payment Terms

10% of the basic price of the Purchase Order as interest free

advance

5% of the basic ex-works prices of Steam Generators on

completion of mechanical design & analysis

5% of basic ex-works prices of Steam Generators on placement of

Purchase Orders for Pressure Boundary Forgings like Tube Sheets,

Shells, Heads and Nozzles

5% of basic ex-works prices of Steam Generators on placement of

Purchase Orders for Incoloy-800 Utubes

5% of basic ex-works prices of Steam Generators on pro-rata basis

for each SG wise on receipt of Pressure Boundary Forgings like

Tube Sheets, Shells, Heads and Nozzles at Contractor’s works

5% of basic ex-works prices of Steam Generators on pro-rata basis

for each SG wise on receipt of Incoloy-800 U-tubes at Contractor’s

works

10% of basic ex-works prices of Steam Generators on completion

of SA-11 of each SG on pro-rata basis







30% of basic ex-works prices of Steam Generators along with its

100% transportation and transit insurance, 100% statutory levies

& Price Adjustment, as applicable on safe transportation &

receipt of each SG at site on pro-rata basis

Balance 10% of prices of each SG shall be released on its

acceptance at site on prorata basis

Tender conditions shall prevail.3Special

ConditionsM/s L&T38

Page 21 of 24


39 M/s L&T GCC 1.6

Arbitration

In event of any dispute arising between the parties, the dispute

shall be referred to arbitration in accordance with the Arbitration

& Conciliation Act, 1996. The venue of arbitration shall be

Mumbai. The arbitral proceeding shall be conducted in English

language. The arbitral award shall be final and binding upon the

parties. NPCIL to confirm.

Tender conditions shall prevail. You may also refer GCC Clause no. 14

Settlement of Disputes.

40 M/s L&TGCC Vol -I/

Section B1.8

Contractors Documents

The rights in the documents prepared by the Contractor belong

to Purchaser at all times. Also note that license has to be given to

Purchaser by the Contractor for non-terminable, transferable and

non-exclusive, royalty free license which can be transferred by

NPCIL to any person whosoever uses the Stores manufactured

and given by the Contractor. Business team to kindly take note of

this and modify as per the commercial terms agreed as L&T does

not transfer license without any royalty fee and also which can be

transferred to any person which is not defined in this clause.

Generally the IPR in the documents prepared belong to the

Owner of the documents. NPCIL to confirm


41 M/s L&T GCC 6.7.6 (b)

NPCIL maintains the operator’s statutory insurance under the

CLND Act, 2010…….

Shall be amended as follows:

“NPCIL shall maintain the operator’s statutory insurance under

the CLND Act, 2010 by subscribing to the Nuclear Insurance Pool,

thereby subrogating to the Indian Nuclear Insurance Pool the

operator’s “Right to Recourse” against suppliers under section

17(a) and (b) of the CLND Act, 2010.”


Page 22 of 24


Additional Notes: The bidders may pl note and comply with the following : 1) In the drop wt test to be carried out at forging manufacturer's place and SG Manufacturer's place , the weld bead shall be deposited by using welding electrode " UTP DUR " and the notch shape in drop wt

specimen shall be 'V" shape. 2) For qualification of SG Forgings to be procured from new vendor/ manufacturer, the

following additional tests in addition to the tests and requirements mentioned in the Tender specifications PC-M-960 and Tender Part-C-1--Special Instruction to Tenderer, shall be carried out on prototype forging of

full scale (1:1) size before proceeding with production job : a) For shells :

STC-A , STC-B , STC-C and RTC coupons shall be taken from the ring cut out from the centre of the length of the shell and extent of testing shall be same as that for coupons taken from the bottom of the ingot of Shell

Forgings as mentioned in the tender specification no. PC-M-960 . b) For Primary Head : STC-A , STC-B , STC-C and RTC coupons shall be taken from the

centre of the Head and extent of testing shall be same as that for coupons taken from the Primary Head forging as mentioned in the tender specification no. PC-M-960.

c) For Secondary Head : STC-A , STC-B , STC-C and RTC coupons shall be taken from the centre of the Head and extent of testing shall be same as that for coupons taken from the Secondary Head (Dished End) forging

as mentioned in the tender specification no. PC-M-960.

d) For Tube Sheet : STC-A , STC-B , STC-C and RTC coupons shall be taken from the centre of the Tube Sheet and extent of testing shall be same as that for coupons taken from the Tube Sheet forging as mentioned in

the tender specification no. PC-M-960.

3) For qualification of SG U-Tubes to be procured from new vendor/ manufacturer, the following additional tests in addition to the tests and requirements mentioned in the Tender specifications PC-M-962 and Tender

Part-C-1--Special Instruction to Tenderer, shall be carried out on prototype forging of full scale (1:1) size before proceeding with production job :

a) 20 no. of tubes of different radii and length -(full scale) shall be manufactured as prototype.

b) The tubes shall be tested by ECT from inside in addition to other specified tests as per applicable specification.

c) The ECT Signature shall be smooth and comparable to good quality tubes from reputed tube manufacturer for SG viz. Valinox , Sandvik etc. Tubes shall not indicate any pilgering noise signals.

d) ECT shall not indicate any ID indications.

e) ECT shall not indicate any OD indications.

4) The thickness profile of all SG nozzles shall be increased by 5% above the thickness shown in the drawing, including the crotch region. However, if the design/analysis demands more than the increased thickness, the

Designer/Supplier is bound to provide the same.

Quality of Tubes and Forgings shall be assessed and approved by NPCIL.

Page 23 of 24


Following Documents are uploaded with this Response which are to be complied with.

1 TECH. SPEC. FOR silver foil gasket

2 FIM -SG Nozzles

3 APP DWG-NA07C

4 APP DWG-NA07D

5 APP DWG-NA07G

6 Drawings- SG Forgings. Shell-I-II-III-IV-V-CONE-TORI HEAD

7 SG tubesheet

8 Shell-V as built only changed dimensions

9 Spherical Head Drawings-Forging

10 Ann-D_table-2(PK)

11 Ann-C_table-2(SAM)

12 Ann-D_table-1(NL)

13 Ann-C_table-1(RS)

Page 24 of 24

Date post:	24-Jul-2020
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