shell & tube heat exchanger

A 30.11.2009 ISSUED FOR BIDS/ENGG. SP KRK TG

Rev. No Date Purpose Prepared by Checked by Approved by

Format No. EIL 1641-1924 Rev. 1 Copyrights EIL All rights reserved

DOCUMENT NO. 6994-326-16-46-TR-6120,

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TECHNICAL REQUIREMENTS FOR

SHELL & TUBE HEAT EXCHANGERS

TECHNICAL REQUIREMENTS

FOR



DOCUMENT NO. 6994-326-16-46-TR-6120,

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Bidding Instructions

1. This is a category-I MR. Vendor to note that no correspondence whatsoever shall be entered

into or entertained after bid submission.

2. Vendor shall furnish quotations only for those items, for which he is approved by EIL and which he can supply strictly as per MR specifications.

3. No technical details of any nature shall be included in the offer. If the offer contains any

technical deviations and clarifications or stipulates and technical specifications (even if inline with MR requirements), the offer shall be liable for rejection. However, for items where the vendor has entered into MOU with EIL, he may state that the offer is as per MOU with EIL.

4. The submission of prices by the vendor shall be construed to mean that he has confirmed

compliance with all Technical Specifications of the corresponding item(s).


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1. The drawings issued for bids are strictly for quotation purpose. The drawing with revision if

required shall be issued along with Purchase Requisition for drawing preparation and fabrication etc. On placement of order the successful vendor can proceed with the procurement of major material for ordered items based on the specifications, drawings and requirements of this requisition.

2 All materials required for fabrication, testing and inspection shall be supplied by vendor. No

material shall be supplied as "FREE ISSUE" by owner. The raw materials for the fabricated equipments shall be procured only from the mills / shops of US/EUROPE/JAPAN/INDIA.

3. It shall be entirely the vendor's responsibility to ensure compliance to codes specified for

residual design, fabrication, testing etc. and to all requirements of Requisition including its specifications / drawings after the order is placed. In view of this, the fabrication drawings prepared by vendor will be reviewed by EIL to the following extent only:

i) Nozzle data, orientation and location, saddle location, dimensions for interfacing. ii) Pass partitions arrangement, tube layout and bundle detail. iii) Design data and materials of construction. iv) Critical details like tube to tubesheet joint detail.

Other details of fabrication drawings submitted shall only be for information/records of EIL and vendor to fabricate, supply equipment based on his responsibility of ensuring compliance to EIL PR requirements including drawings, specifications etc. Vendor to note that approval of documents does not mean approvals of any deviations contained therein. Such deviations if noticed at anytime, even after delivery, same to be rectified as per requisition by vendor.

4. Vendor must ensure that all the vendor documents are thoroughly checked and approved at vendor's end by vendor's competent engineer and responsible engineering office in charge before the same are submitted to EIL for review.

5. The tube bundles for the following items are interchangeable among themselves, and the

same shall be checked at the vendor shop prior to dispatch:

Set /Sl. No. Item Nos.

1. EA-32603A & EA-32603B 2. EA-32609A & EA-32609B

6. Test ring assembly shall be stuffing box type in accordance with Fig. E-4.13.2 of TEMA.

Drawing for test rings/test flanges shall be furnished by the vendor separately.

Vendor to design and supply test rings/test flanges including all testing accessories separately in accordance with following instructions:

Individual test rings/test flanges as listed against the items (refer sht 2 of 8 of spec # 6994-326-16-46-BP-6120, Rev A).

Common test rings/test flanges for following items:


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Set /Sl. No. Item Nos.

1. EA-32603A & EA-32603B

2. EA-32609A & EA-32609B

All testing materials /accessories to be provided by vendor, even if not specified in the

equipment datasheet. 7. Cathodic protection as per 6860-06-42-SP-(HOLD) shall be provided for following items with

painting and sacrificial anodes on channel and floating head cover to minimise waterside corrosion.

Sl.No. Item Nos.

1 NIL

Vendor must submit anode test reports as required in the anodes specification for EIL-SMMSs approval before start of the anodes manufacture. This shall be HOLD point for Inspection.

8. While preparing fabrication drawing it shall be endeavored to cover all fabrication details in

minimum number of drawings, not exceeding 5 in any case. There shall be a separate drawing for gaskets. Preparation of fabrication drawing will also include developing tube layouts as under.

o Based on enclosed tube layouts.

Based on indicative tube layouts and Guide lines issued with this requisition. The indicative tube layouts for the items covered in this requisition are issued to the vendor

for developing detailed tube layouts in line with the Guide lines issued now. The detailing will call for providing tie rods, spacers, sealing strip/sliding strips, seal rods, eye bolts, plugs for eye bolts, inserts for eye bolts in case of clad tube sheets etc. Vendor is expected to consider the aspects and base his quotation accordingly. No extra cost shall be admissible on this account.

9. Vendor is expected to quote strictly in accordance with the requirement of the requisition. 10. ACCEPTABLE ALTERNATIVES:

(I) SA 516 Gr 70 is also acceptable in place of SA 516 Gr 60, except for Amine and sour service wherever specified in data sheet

(II) Forgings can be used in place of plates or pipes wherever the stress values are same or higher.

(II) Higher thickness for reinforcement pad, stiffeners and non-pressure parts shall be acceptable


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11. Vendor shall comply with clause 1.2.2 of 6-15-0001 in respect of following items falling under the purview of IBR.

Sl. No. Item Nos.

1. EA-61402 2. EA-61410/71410/81410

3. EA-61412/71412/81412

4. EA-61413/71413/81413

5. EA-61416/71416/81416

6. EA-61417/71417/81417 12. Hardness limits of various material for nozzle flange & RTJ gaskets are as follows:

FLANGES

GASKET

MATERIAL HARDNESS (BHN) MATERIAL HARDNESS (BHN)

C.S 140 (Min) SOFT IRON 90 (Max.)

1 Cr TO 5 Cr 150 (Min) 5 Cr- Mo 130 (Max.)

9 Cr 160 (Min) 5 Cr- Mo, 9 Cr-1 Mo 140 (Max)

SS 304, 316 150 (Min) SS 304L, SS 316L 160 (Max)

SS304L,316L 140 (Min) SS 304L, SS 316L 160 (Max)

SS321,SS347 170 (Min) SS 321L, SS 347 160 (Max)

13. Positive material identification (PMI), vendor shall ensure that all alloy steel and stainless

steel materials are properly identified and finally check tested by a PMI analyser before dispatch of equipment as per 6-81-0001.

14. Metric threads shall be used for all non-standard flanges. However ASME flanges may have

threads as per American standards. 15. Interchangeable / 180 rotatable bundles shall have common pass partition grooving

arrangements in respective tubesheets. The interchangeability shall be ensured in shop by physical insertion of bundle in shell. For the items where tube bundles are interchangeable, it is vendors responsibility to ensure all the materials dimensions of the tube bundle are same. In case of any discrepancy, vendor shall bring the same to EIL notice and EIL decision shall be final and binding on the vendor.

16. During welding of nozzles in exchanger, if back gouging is required, gauging electrodes

should be used instead of grinding to avoid / minimize the reduction in the thickness of nozzle pipe.


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17. All the reinforcement pad tell-tale holes should be tapped properly and plugged with hard

grease. No grub screws to be provided. 18. Vendor shall ensure that all data folder documents including the AS BUILT DRAWING are

updated & complete in all respect & incorporate all suggestions/correction informed by EIL-Inspection while obtaining certificate of completeness from Inspection.

19. Vendor shall furnish list of drawings/ documents with schedule of submission of drawings for

approval by EIL. The same shall be submitted to EIL immediately after placement of order. Drawing index duly updated to be submitted with each submission of documents.

20. Refer clause 4.6 of spec.6-78-0003. Final documentation shall be submitted in soft copy in

CD form in 2 sets in addition to the specified requirements of documentation. 21. All mandatory spares shall be listed separately along with description, item no., detailed

specifications, name of supplier etc. 22. All commissioning spares shall be listed separately along with description, item no., detailed

specifications, name of supplier etc. 23. Wherever Clad is specified, Weld deposit is not permitted. 24. Vendor must ensure minimum thickness of undiluted finished weld overlay as per the clause

4.3.9.2 of EIL specification 6-15-0001 Rev.3 and shall take special precautions to ensure the same. Vendor to take suitable allowance on machining in this regard so that minimum undiluted thickness is guaranteed after machining. Vendor to qualify WPS/PQR and submit documents to the inspecting authority for approvals before proceeding with the fabrication.

Also refer clause 4.3.9 of EIL specification 6-15-0001. The following additional requirements

shall also be complied. All weld overlays shall be tested for iron pick-up after each pass during welding in addition to other tests stipulated. In case of weld overlay failure due to poor workmanship while in service during the warranty period, the affected component shall be replaced by vendor without any cost and delivery implication.

25. Note-1 on exchanger setting plan drawing is not relevant to vendor. 26. The heat exchangers should have free movement at sliding end on the supports to avoid any

restriction during thermal expansion. The saddle of the exchanger should be at centre of the foundation bolt slot during erection. Sliding end of Exchangers shall be painted as CAUTION-SLIDING END in black on the primer coating in the shop. Only SS shims shall be used for equipment alignment.

27. Wherever radiography is indicated as FULL or 100% all long and circ. Seams including

flange to neck, pipe to pipe and pipe to fitting shall be 100% radiographed. 28. For item no. EA-61401, EA-61410/71410/81410 and EA-61412/71412/81412 vendor shall

furnish the complete procedure for PWHT of shell assembly and get the same duly approved by the third party inspection agency before start of fabrication.

29. INSPECTION Inspection requirements are as mentioned here under :


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Stage wise and final inspection by EIL. Indigenous materials to be inspected by EIL in accordance with clause 7 of 6-15-0001. Imported materials if any shall be inspected by any of the following third party inspection

agency - in accordance with 6-15-0001.

All stage wise and final inspection as per attached TPI by following third party inspection agencies

A. Certification Engineers International Limited (CEIL) B. LLOYDS Register of Industrial Services (LRIS) C. Det Norske Veritas (DNV) D. Bureau Veritas (BV) E. TUV

All cost towards third party inspection & IBR inspection charges (wherever IBR is applicable)

shall be borne by the vendor. If the inspection is carried out by third party only, the cost of the same to be included in the offer.

30. TECHNICAL DOCUMENTATION REQUIRED WITH BID The technical part of the bid document shall contain following:

o Duly filled-in, signed and stamped comment/query sheet. o Deviation Schedule Technical, duly filled-in, stamped and signed. o Any other documents as required in the MR.

Unpriced Price Schedule (with prices left blank) must indicate following:

Items quoted Refer Scope in MR & Basis of pricing. o Name of third party inspection agency. Clearly marking items not quoted by vendor as NOT QUOTED. INDICATES APPLICABILITY.

shell & tube heat exchanger

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