Technical specification for Purchase requisition number:

Technical specification for Purchase requisition number: 3000012238 Fabrication, Testing and Supply of the Heat Exchanger & Tube Bundle 1. Scope of Supply: Fabrication, Testing and Supply of one (01) nos Heat Exchanger Off gas Cooler Tube(EA33223) along with attachment/loose items like saddle, channel cover davit etc.,one(01) no Tube Bundle for heat exchanger CBD Cooler (EA33250) & one (01) nos Tube Bundle for heat exchanger FGC Blow down Cooler (EA33251) along with equired Dummy shell /Test ings/test Flanges/Test Covers designed & Manufactured by the vendor for the purpose of Hydro testing of the Tube Bundle at the vendor s shop. Detailed Fabrication Dimensions are as per following Drawing No:- a) H-1194/FAD/2009 sh 01 to 04 b) MAPL-C-1828 Sh 02 of 06 ev 3 c) MAPL-C-1829 Sh 02 of 06 ev 3 d) MPL Specification 00-ES-400-004-0 1.1. Heat Exchanger EA33223 No of Tubes: 228 Nos. Tube Sizes: 25mm OD x 2.5mm thk (minimum) Tube Length: 2750 mm Tubing Specification-SA179 Design Data: Shell M.O.C Killed Carbon Steel Tube CS/SA179 (HIC esistant) Design Pressure (kg/cm 2 ) 20.5 15.8 Design Temperature ( 0 C) 75 65 Hydro test pressure (kg/cm 2 ) 26.65 20.54 Process Fluid Sour Gas Cooling Water Design Code: ASME Sect VIII Div1 ED 2007 and TEMA Class "" ED 2007 Type: AEM # Horizontal Position The exchanger material procurement and fabrication shall be as per the details given in Exchanger OEM drawing no: H-1194/FAD/2009 sheet 1 of 4 to sheet 4 of 4, applicable. Material Specifications: a) All pressure bearing materials used for construction of this exchanger shall be in normalized condition and carbon content for plates shall not exceed 0.23%. b) All carbon steel material in contact with shell side fluid shall be killed quality and shall meet the requirements of NACE standard - M0103 for wet sour service. c) All tubes shall be cold drawn, seamless and in annealed condition. d) Necessary chemistry control for the shell side materials along with restrictions on manufacturing process, hardness restrictions during fabrication welding/haz, Post Weld heat treatment to restrict hardness of weld and HAZ need to be complied as per the standard.

e) The Chemistry control, hardness of the material shall be as per NACE M0103 and resistance of the tubes to HIC shall be carried out as per NACE P-0284 using solution A of NACE TM -0284. For all other notes on Material and Fabrication including for Tube bundle please refer drawing supplied. 1.2. Tube Bundle for Heat Exchanger EA33250 No of tubes: 529 Tube MOC: SA 179 Tube Sizes: 25 mm OD x 2.5 mm thk (minimum) Tube Length: 6000 mm Design Data: Shell Tube Design Pressure (kg/cm 2 ) 18.2 14 Design Temperature ( 0 C) 200 65 Hydro test pressure (kg/cm 2 ) 23.7 18.2 Process Fluid Hydrocarbon Cooling Water Design Code: ASME Sect VIII Div1 2007 ED and TEMA Class "" 2007 ED. TEMA: AES# Horizontal Position For bundle procurement and bill of materials, please refer drawing no: MAPL-C-1828 sheet 2 of 6 to sheet 6 ev3. 1.3. Tube Bundle for Heat Exchanger EA33251 No of tubes: 26 Tube MOC: SA 179 Tube Sizes: 25 mm OD x 2.5 mm thk (minimum) Tube Length: 6000 mm Design Data: Shell Tube Design Pressure (kg/cm 2 ) 7.7 10 Design Temperature ( 0 C) 250 65 Hydro test pressure (kg/cm 2 ) 10.1 13 Process Fluid FGC Blowdown Cooling Water Design Code: ASME Sect VIII Div1 2007 ED and TEMA Class "" 2007 ED. TEMA: AES# Horizontal Position For bundle procurement and bill of materials, please refer drawing no: MAPL-C-1829 sheet 2 of 6 ev 3. a) Indicative QAP for tube bundle procurement is attached as Annexure-1. However, QAP and fabrication drawing along with bill of material shall be submitted for approval to MPL prior to commencement of fabrication. Dummy shell fabricated for testing the bundle shall be supplied to MPL along with the new tube bundle. 2. General Specification for Tube & Bundle 2.1. All Tubing shall be seamless & cold drawn. 2.2. Tube gauge / thick specified is the required minimum wall thickness unless otherwise specified.

2.3. Tubing shall be in the fully heat treated conditions as received from the mill. 2.4. Product analysis of tubes shall be carried out & reported. Material test Certificate to be submitted along with the Tube Bundle. 2.5. Tube to tube sheet expansion shall be done as per MPL specification 00-ES-400-004-0 2.6. No distortion whatsoever shall be permitted on the gasket seating surfaces, If distorted the same shall be machined. 2.7. Sliding strips shall be provided to facilitate pulling the removable tube bundles. Sliding strips shall be properly seated in the baffles, secured with a complete seal weld (both sides) and attached to the stationary tube sheet with a full penetration weld. The sliding strips shall protrude 2mm beyond the periphery of the baffles. 2.8. When mechanical cleaning is required on shell side (square pitch patterns), the sliding strips shall not obstruct the tube lanes or pass partition. 2.9. Baffles shall be tied together with rods and spacers and provided when necessary with 90 top and bottom notches 10 mm wide for venting and draining. The drainage notches shall be increased to 25 mm width in case shell side fluid is exceptionally dirty or contains slurry. 2.10. The use of a 2-pass shell employing a continuous longitudinal baffle shall require buyer's approval. 2.11. If necessary, impingement protection shall be provided either by a square plate or round- plate baffle, two rows of impingement rods and a distributing belt or by an enlarged inlet nozzle with an internal distributor plate. 2.12. Impingement baffle shall be as per VS-42. If special baffle is specified, the following criteria shall be applied. 2.13. Plate baffles shall extend at least 25 mm beyond the projection of the nozzle bore. 2.14. The unrestricted bundle entrance flow area at the impingement plate baffle shall not be less than the flow area of the inlet nozzle. 3. Inspection scope 3.1. Inspection of all material shall be done by TUV / TEIL / DNV / BV/ LLOYDS only and this inspection is in the scope of the vendor. Vendor shall submit relevant certificates along with the materials. The quote from vendor shall be inclusive of third party inspection charges. 3.2. eview of Quality Assurance Plan (QAP), approval by MPL. 3.3. eview of Test certificate for traceability of material meeting original specification for all pressure& non-pressure parts. 3.4. eview of Heat Treatment report as per material specification as applicable. 3.5. If the material is sourced from vendor other than manufacturer, then selection of samples (min two samples from each heat/lot) for mechanical and chemical(product analysis) test. All mechanical test required as per applicable material specification shall be witnessed by TPI. Product chemical analysis shall be reviewed in accordance with NACE requirements for SSC. 3.6. Witness of UT scanning and Impact test of Forgings. 3.7. eview of HIC esistance testing as per M P-0284. 3.8. eview of ECT of tubes & Witness Hydrotest of tubes (100%). 3.9. eview of WPS/PQ, NDT procedures, tube to tube sheet expansion procedure 3.10. eview of Mock up test for tube to tube sheet expansion joint. 3.11. Witness DP test on the knuckle portion and welds (if any) after forming.

3.12. Witnessing Air soap solution test of tube to tube sheet joint, visual inspection, and liquid penetrant examination as applicable and random checking expansion percentage. 3.13. Stage wise inspection during fabrication as per approved QAP. 3.14. Witness DP test of welds after back grinding. 3.15. eview of welding electrodes test certificates 3.16. eview of adiography reports. 3.17. Witness Tube sheet inspection after drilling and skeleton assembly (shell to tubesheet fit-up) before tube insertion. 3.18. Inspect percentage thinning, Length of Expansion etc of Tube to tube sheet joint. 3.19. eview of Heat Treatment report of formed parts / shell side of exchanger as per specification/drawings. 3.20. Witness F pad pneumatic test and Tube to Tube sheet joint leak test. 3.21. eview calibration reports of measuring instruments. 3.22. Witness hydro test of the exchanger Shell, Tube side. 3.23. Inspection for dimensional conformance and marking on the exchanger. 3.24. eview surface preparation and witness paint DFT of the equipment. 3.25. Issue Product release note giving details of inspection carried out.eview of Quality Assurance Plan (QAP), approval of QAP shall be done by MPL. 4. Hydrostatic test and other tests 4.1. These tests shall be witnessed by MPL / MPL authorized inspectors or Third party inspectors at vendor s shop. Hydrostatic test shall be performed with indicating pressure gauge connected to the uppermost part of the equipment. Water used for these tests shall be salt free. Minimum metal temperature during hydrotest shall be 20º C. and the test pressure shall be maintained for duration of minimum one hour period. 4.2. Final hydrotest shall be carried out at factory test pressures mentioned in the drawing. equired Dummy shell /Test ings/test Flanges/Test Covers shall be designed & Manufactured by the vendor for the purpose of Hydro testing of the Tube Bundle at the vendor s shop. 5. Design codes with latest editions The latest design codes given below shall be used for design, manufacture, testing and acceptance of the equipment. i. ASME Boiler and Pressure Vessel code Sec. VIII div. I ii. TEMA, standard of tubular exchanger manufacturers association ( class as specified on the drawings / Data sheets) iii. ASTM specification iv. AWS -ASME specification for welding electrodes v. ANSI (American national standard institute) B 16.5 steel pipe flanges and flanged fitting and B16.11 Forged fittings socket welding & threaded. 6. Design and Drawings approvals 6.1. The drawing & Material of Construction Sheet issued with this enquiry is for estimation purpose only.

6.2. The manufacturer shall prepare detailed QAP, fabrication drawings and material of construction and it shall be submitted for approval. Procurement of materials, fabrications etc shall start only after such approval. 7. Delivery Period The item should deliver within 06 month from date of approval of Drawing/QAP. Drawing/QAP shall be submitted within 02 month of placement of Purchase Order. 8. Guarantee The manufacturer shall be responsible for any defects due to any inferior materials or workmanship developed under operating conditions within 12 months from the date of the commissioning or 18 months from the date of receipt of the equipment at the site whichever is earlier. The manufacture shall attend his own cost & make necessary repairs and /or replacements without delay

CLIENT P.O. NO./ DATE MANGALOE EFINEY AND PETOCHEMICALS ANNEXUE-1 QUALITY ASSUANCE PLAN TUBE BUNDLE Document No. QAP/MPL/003 EQUIPMENT NO./Name SITE MANGALOE, KANATAKA TEMA TYPE OF EXCHANGE INSPECTION BY (TPI) TUBE MOC: SCOPE OF INSPECTION Sl. No. ACTIVITY DESCIPTION EXTENT OF CHECK EFEENCE DOCUMENT ACCEPTANCE STD FOMAT OF EPOT Supplier TPI MPL EMAKS 1 Quality Assurance Plan Stages of inspection & Testing 100% P, Drawing P QAP H A efer Note:3 2 Drawing Drawings 100% P., Drawing 3 Approval of Documents 3.1 NDE Procedures PT/UT/MT etc. as applicable - ASME Sec V,P. 3.2 Heat Treatment Procedure PWHT of skeleton assembly as applicable 3.3 Inspection & testing Procedure Hardness/PMI/Hydrotesting - 3.4 Welding & Testing Plan Welding & Testing Plan - 3.5 Qualification of WPS/PQ 3.6 3.7 Qualification of Welders / Welding Operators Qualification of Tube to Tubesheet Mock up eview Existing WPS/PQ Prepare new WPS&PQ & Test eview Existing WPQ Prepare new WPQ eview Existing Prepare new - - - - ASME Sec VIII Div.1, P ASME Sec VIII Div.1, P ASME Sec VIII Div.1, P., Drawing ASME Sec IX, P., Drawing ASME Sec IX, P., Drawing ASME sec. VIII Div.I, P, Drawing P, ASME Sec VIII Drawing, TEMA Div 1 CL ASME Sec VIII Div.1, P., ASME Sec VIII Div.1, P ASME Sec VIII Div.1, P ASME Sec VIII Div.1, P., Written Procedure Written Procedure Written Procedure Written Procedure ASME Sec IX WPS/PQ H ASME Sec IX Welder List / WPQ H ASME Sec VIII Div.1, P, Test ecord H A efer Note:3 H H H H H W W W W W W W efer.note:1 efer.note:1 efer.note:1 efer.note:1 efer.note:1 efer.note:1 efer.note:1

SCOPE OF INSPECTION Sl. No. ACTIVITY DESCIPTION EXTENT OF CHECK EFEENCE DOCUMENT ACCEPTANCE STD FOMAT OF EPOT Supplier TPI MPL EMAKS 4 Material control 4.1 Inspection at rececipt stage a) Plates (For pressure parts as well as non pressure parts) 1) eview of MTC,Visual, dimensional, and marking inspection, correlation with MTC. 2) Impact test as applicable. Impact energy values as per UG-84. 3)Heat treatment: Normalized & Tempered 4) Tension test as per product material specification. 5) Product analysis shall be reported. 6) Hardness check as applicable 7) Specific requirement as per applicable P 100% ASME Sec II A, P, Approved Drawing ASME Sec II A, P, Approved Drawing Mill test, Heat Treatment reports, Chemical analysis report, Mechanical test reports, Hardness Check eports etc. H (All Materials for Pressure parts shall be inspected at sub Vendor's shop by TPI) efer.note:2 b) Forgings (For pressure parts as well as non pressure parts) 1) eview of MTC,Visual, dimensional, and marking inspection, correlation with MTC. 2) Impact test as applicable. Impact energy values as per UG-84. 3) Heat Treatment: Normalized & Tempered 4) Hardness check as applicable 5) Non destructive test : All forgings shall be 100% Ultrasonically examined as per SA-388. 6) Product analysis shall be reported. 7) Specific requirement as per applicable P/TDC. 100% ASME Sec II A, P, Approved Drawing ASME Sec II A, P,UT-Sec.VIII Div.2, 3.34.2 Mill test, Heat Treatment reports, Chemical analysis report, Mechanical test reports, Hardness Check eports etc. H (All Materials for Pressure parts shall be inspected at sub Vendor's shop by TPI) efer.note:2

SCOPE OF INSPECTION Sl. No. ACTIVITY DESCIPTION EXTENT OF CHECK EFEENCE DOCUMENT ACCEPTANCE STD FOMAT OF EPOT Supplier TPI MPL EMAKS c) Tubes 1) eview of MTC, Visual, dimensional and marking inspection, correlation with MTC. 2) Tubes i) Seam less & cold drawn condition. ii) Heat treatment as per tube materiaal specification iii) Product analysis shall be reported. v) Hardness ckeck of finished tubes as applicable vi) Mechanical testing: Flattening, Flaring, flange test and hardness test vii) Hydrotest as per applicable pressure. 3) Specific requirement as per applicable P/TDC. 100% ASME Sec II A, Sec VIII Div 1, P, Approved Drawing ASME Sec II A, Sec VIII Div 1, P, Approved Drawing Mill test, Heat Treatment reports, Chemical analysis report, Mechanical test reports, Hardness Check eports, H (All Materials for Pressure parts shall be inspected at sub Vendor's shop by TPI) efer.note:2 d) Welding consumables eview of test certificates. 100% ASME Sec II C ASME Sec II C Test certificates H efer.note:2

SCOPE OF INSPECTION Sl. No. ACTIVITY DESCIPTION EXTENT OF CHECK EFEENCE DOCUMENT ACCEPTANCE STD FOMAT OF EPOT Supplier TPI MPL EMAKS 4.2 Material Identification a) Pressure parts & non pressure parts welded to pressure parts.(plates, forgings, etc.,) eview of MTC Check test report (If required) Visual & Dimensions Identification marking 100% ASME Sec II A, Sec VIII div 1, Approved Drawing, P ASME Sec II A, Sec VIII div 1, Approved Drawing Inspection Progress Chart H H H W H H efer.note:2 b) Non Pressure parts. (Baffels, Tie rods, Spacers, Structurals etc.) eview of MTC / Check test report. Visual & Dimensions. Identification Marks. 100% ASME Sec II A, Sec VIII ASME Sec II A, Div I, Approved Drawing, Sec VIII Div I, P. Approved Drawing Job Card H W W efer.note:2 5 Inspection of Welds a) Complete Welds Weld visual and size of fillet. NDE as per WTP as applicable. 100% ASME Sec VIII Div. I, ASME Sec. VIII Approved Drawing, WTP. Div. I, Drawing. ASME Sec. V. Inspection Progress Chart, NDE eports. H W efer.note:2

SCOPE OF INSPECTION Sl. No. ACTIVITY DESCIPTION EXTENT OF CHECK EFEENCE DOCUMENT ACCEPTANCE STD FOMAT OF EPOT Supplier TPI MPL EMAKS 6 Tube Bundle In Fabrication Process. 6.1 Tube Sheets Identification Marking. Visual and dimensions (Tube Hole Finish, GO-No-Go Check, Expansion, Hole layout, Partition groove, Ligament, Tie rod holes, Pulling bolt holes,sealing strip,central rod,sliding strip) Dimensions and finish of Gasket seating face. Visual and Dimensions. 6.2 Baffle & Support Plates (Tube Hole finish, Hole layout, Size, Chamfer, Notch, Tie rod holes, Baffle Cut orientation., Helix angle) i)visual & Dimensions. 6.3 Skeletons for Tube Bundle ii) Welding Arrangement & Spacing. iii)tube hole & Tubes cleaning before tubes insertion. 100% 100% 100% Approved Drawing, TEMA CL Approved Drawing, TEMA CL Approved Drawing, TEMA CL Approved Drawing, eports H W TEMA CL Approved Drawing, eports H W TEMA CL Approved Drawing, eports H W TEMA CL 6.4 Tube to Tube Sheet Joint Expansion of Tubes 100% Approved Drawing, TEMA CL, P TEMA CL,, Mock-up Test ecord. eports H (*) (*) TPI to check expansion % for 10% of the tubes, per tube-sheet. If any irregularities observed, 100% to be checked by TPI.

SCOPE OF INSPECTION Sl. No. ACTIVITY DESCIPTION EXTENT OF CHECK EFEENCE DOCUMENT ACCEPTANCE STD FOMAT OF EPOT Supplier TPI MPL EMAKS 7 Final Inspection. 7.1 Tube Bundle 8 Testing Completeness of Bundle, Visual examination & Dimensional check 100% TEMA CL, Approved Drawing, P., TEMA CL, Inspection eports, Approved Drawing, NDE eports P. H W efer.note:2 8.1 Hydro Test The exchanger shell and tube side testing shall be carried out using dummy shell at the Factory test pessures mentioned in drawing. Also, ring test to be carried out seperately to check for tube to tube sheet joints. 100% TEMA CL, ASME Sec. VIII Div. I, Approved Drawing, Hydro Procedure. TEMA CL, ASME Sec. VIII Div. I, Approved Drawing, No leakage. eports H W efer.note:2 8.2 Draining & Drying Tube ID and OD Side 100% P and Approved drawing No traces of Water eport H 9 Final Dispatch 9.1 Dispatch Clearance and Documents submission Original IN along with one set of approved copy of all the documents reviewed by TPI during stage wise inspection like MTC, eports, Manufacturer data book, gaurantee certificates etc., Approved Drawings 3 sets in A1 size (both soft and hard copies). 100% P P IN and other reports H H

SCOPE OF INSPECTION Sl. No. ACTIVITY DESCIPTION EXTENT OF CHECK EFEENCE DOCUMENT ACCEPTANCE STD FOMAT OF EPOT Supplier TPI MPL EMAKS LEGEND: NOTES : H : Hold (Not to proceed unless the stage is cleared by QC / TPI as Note 1 TPI to review is already approved procedure is available. If not available, TPI to witness and approve a new procedure. W : Witness Note 2 Where ever the code reference is stated, Edition & Addenda shall be the latest edition : eview of ecords Note 3 Fabrication of the exchanger shall start only after Drawing and QAP has been approved by MPL A : Approve W : andom Witness P : Purchase equisition PO : Purchase Order TPI : Third Party Inspection Agency MPL : Mangalore efinery & Petrochemicals Ltd. IN : Inspection elease Note. MDMT: Minimum Design Metal Temperature. PQ : Procedure Qualification ecord. WPQ : Welder Performance Qualification. WPS : Welding Procedure Specification. WTP : Welding & Testing Plan. NDE : Non Distructive Examination. PEPAED BY CHECKED BY APPOVED BY

General Notes: 1. The exchanger material procurement and fabrication shall be as per the details given in exchanger OEM drawing no: H-1194/FAD/2009 sheet 1 of 4 to sheet 4 of 4, as applicable. 2. Material Specifications: a) All pressure bearing materials used for construction of this exchanger shall be in normalised condition and carbon content for plates shall not exceed 0.23%. b) All carbon steel material in contact with shell side fluid shall be killed quality and shall meet the requirements of NACE standard - M0103 for wet sour service. c) All tubes shall be cold drawn, seamless and in annealed condition. d) Necessary chemistry control for the shell side materials along with restrictions on manufacturing process, hardness restrictions during fabrication welding/haz, Post Weld heat treatment to restrict hardness of weld and HAZ need to be complied as per the standard. e) The Chemistry control, hardness of the material shall be as per NACE M0103 and resistance of the tubes to HIC shall be carried out as per NACE P-0284 using solution A of NACE TM -0284. 3. For all other notes on Material and Fabrication including for Tube bundle please referdrawingsupplied. Scope for Third Party Inspection 1. eview of Quality Assurance Plan (QAP), approval by MPL. 2. eview of Test certificate for traceability of material meeting original specificationfor all pressure& non-pressure parts. 3. eview of Heat Treatment report as per material specification as applicable. 4. If the material is sourced from vendor other than manufacturer, then selection of samples (min two samples from each heat/lot) for mechanical and chemical(product analysis) test. All mechanical test required as per applicable material specification shall be witnessed by TPI. Product chemical analysis shall be reviewed in accordance with NACE requirements for SSC. 5. Witness of UT scanning and Impact test of Forgings. 6. eview of HIC esistance testing as per M P-0284. 7. eview of ECT of tubes & Witness Hydrotest of tubes (100%). 8. eview of WPS/PQ, NDT procedures, tube to tube sheet expansion procedure 9. eview of Mock up test for tube to tube sheet expansion joint. 10. Witness DP test on the knuckle portion and welds (if any) after forming. 11. Stage wise inspection during fabrication as per approved QAP. 12. Witness DP test of welds after back grinding. 13. eview of adiography reports. 14. Witness Tube sheet inspection after drilling and skeleton assembly (shell to tubesheet fit-up) before tube insertion. 15. Inspect percentage thinning, Length of Expansion etc of Tube to tube sheet joint. 16. eview of Heat Treatment report of formed parts / shell side of exchanger as per specification/drawings. 17. Witness F pad pneumatic test and Tube to Tube sheet joint leak test.

18. eview calibration reports of measuring instruments. 19. Witness hydro test of the exchanger Shell, Tube side. 20. Inspection for dimensional conformance and marking on the exchanger. 21. eview surface preparation and witness paint DFT of the equipment. 22. Issue Product release note giving details of inspection carried out. As-Built drawings along with all applicable documents reviewed/approved by TPI along with manufacturer data book and shall be submitted as final documents to MPL. For exchanger fabrication (Offgas Cooler) and bill of materials please refer OEM drawing no: H-1194/FAD/2009 sheet 1 of 4 to sheet 4 of 4, as applicable. QAP and fabrication drawing along with bill of material shall be submitted forapproval to MPLprior to commencement of fabrication. Bundle procurement recommendation for EA-33250 The cooler is of TEMA AES type (four pass - tube, floating head) having 529 tubes of SA 179 (carbon steel MOC) having 25 mm OD x 2.5 mm thk (min.) x 6000 mm long tubes. Scope of supply: The bidder shall supply tube bundle, floating head cover along with dummy shell (designed & fabricated for bundle testing purpose) Quantity: 01 no. Specifications for spare tube bundle Design Code: ASME Section VIII Division I and TEMA Class. Type: AES (H) Design Data: DESCIPTION UNIT SHELL TUBE M.O.C SA 516 Gr 60 SA179 Design Pressure Kg/cm² g 18.2 14 Design Temperature C 200 65 Operating Pressure Kg/cm² g 7 4 Operating Temperature (In/Out) C 160 / 70 33 / 45 Fluid (Circulated) Hydrocarbon Cooling Water No. of Tubes Nos 529 Scope of Third Party Inspection: ü eview of Quality Assurance Plan (QAP), approval of QAP shall be done by MPL. ü eview of Test certificate for traceability of material meeting original material specification for all pressure& non-pressure parts. ü eview of Heat Treatment report as per material specification as applicable. ü If material is sourced from vendor other than manufacturer, then TPI shall select samples (minimum two samples from each heat/lot) for mechanical and chemical (product analysis) test. All Mechanical test required as per the applicable material specification shall be carried out and witnessed by TPI. Product chemical analysis report shall be reviewed.

ü eview of hydro test certificate of tubes. ü eview of WPS/PQ, NDT procedures, tube to tube sheet expansion procedure ü Inspection of tube sheet after machining. ü Witnessing Air soap solution test of tube to tube sheet joint, visual inspection, and liquid penetrant examination as applicableand random checking expansion percentage. ü Stage wise inspection during fabrication as per QAP. ü Inspection for dimensional conformance. ü Witness hydro test of tube bundle assembly. ü Issue product release note giving details of all inspection activities carried-out As-Built drawings along with all applicable documents reviewed/approved by TPI along with manufacturer data book. All these documents shall be submitted to MPL. For bundle procurement and bill of materials, please refer OEM: M/s Meenakshi Associates Pvt Limited drawing no: MAPL-C-1828 ev 3 sheet 1 of 6 to sheet 6 of 6, as applicable. Indicative QAP for tube bundle procurement is attached as Annexure-1. However, QAP and fabrication drawing along with bill of material shall be submitted forapproval to MPLprior to commencement of fabrication. Dummy shell fabricated for testing the bundle shall be supplied to MPL along with the new tube bundle. Bundle procurement recommendation for EA-33251 The cooler is of TEMA AEM(H) type (two pass - tube, floating head) having 26 tubes of SA 179 (carbon steel MOC) having 25 mm OD x 2.5 mm thk (min.) x 6000 mm long tubes. Scope of supply: The bidder shall supply tube bundle, floating head cover along with dummy shell (designed & fabricated for bundle testing purpose) Quantity: 01 no. Specifications for spare tube bundle Design Code: ASME Section VIII Division I and TEMA Class. Type: AES (H) Design Data: DESCIPTION UNIT SHELL TUBE M.O.C SA 516 Gr 60 SA179 Design Pressure Kg/cm² g 7.7 10 Design Temperature C 150 65 Operating Pressure Kg/cm² g 0.1 4 Operating Temperature (In/Out) C 100 / 45 33 / 45 Fluid (Circulated) FGC blowdown Cooling Water No. of Tubes Nos 26

Scope of Third Party Inspection: ü eview of Quality Assurance Plan (QAP), approval of QAP shall be done by MPL. ü eview of Test certificate for traceability of material meeting original material specification for all pressure& non-pressure parts. ü eview of Heat Treatment report as per material specification as applicable. ü If material is sourced from vendor other than manufacturer, then TPI shall select samples (minimum two samples from each heat/lot) for mechanical and chemical (product analysis) test. All Mechanical test required as per the applicable material specification shall be carried out and witnessed by TPI. Product chemical analysis report shall be reviewed. ü eview of hydro test certificate of tubes. ü eview of WPS/PQ, NDT procedures, tube to tube sheet expansion procedure ü Inspection of tube sheet after machining. ü Witnessing Air soap solution test of tube to tube sheet joint, visual inspection, and liquid penetrant examination as applicableand random checking expansion percentage. ü Stage wise inspection during fabrication as per QAP. ü Inspection for dimensional conformance. ü Witness hydro test of tube bundle assembly. ü Issue product release note giving details of all inspection activities carried-out As-Built drawings along with all applicable documents reviewed/approved by TPI along with manufacturer data book. All these documents shall be submitted to MPL. For bundle procurement and bill of materials, please refer OEM: M/s Meenakshi Associates Pvt Limited drawing no: MAPL-C-1829 ev 3 sheet 1 of 6 to sheet 6 of 6, as applicable. Indicative QAP for tube bundle procurement is attached as Annexure-1. However, QAP and fabrication drawing along with bill of material shall be submitted forapproval to MPLprior to commencement of fabrication. Dummy shell fabricated for testing the bundle shall be supplied to MPL along with the new tube bundle. ecommendations for procurement of tubes: As recommended, all the old tube bundles shall be re-tubed and kept as maintenance spares. All these bundles have same tube material and thickness with varying no. of tubes in each exchanger. The total no. of tubes required for re-tubing of the above bundles is about 700 numbers. It is considered that the tubes having lesser length (for EA 33223) can be utilised from the longer tubes of 6000 mm by splitting single tube into 2 tubes. Specification for Tubes:SA 179 (carbon steel MOC), 25 mm OD x 2.5 mm thk (min.) x 6000 mm long Scope of Third Party Inspection (TPI) for tubes:- ü eview of Test certificate for traceability of material meeting original material specification ü eview of chemical analysis/witness of mechanical testing ü If material is sourced from vendor other than manufacturer, TPI shall select samples (minimum two samples from each heat/lot) for mechanical and chemical (product analysis) test. All Mechanical test required as per the applicable material specification shall be witnessed by TPI. Product chemical analysis report shall be reviewed.

ü Witnessing hydro test of tubes ü Inspection for dimensional conformance and marking on the tubes ü Issue of inspection release note showing all activities carried Indicative QAP for tubes procurement is attached as Annexure-2. However, the final QAP shall be submitted for approval to MPL.