Volume-II - GAIL

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6.2.7.3 (New) 6.2.7.4 (New) Procedure X-65 : 0.1100 X-70 : 0.1075 The Mandrel shall be plunged into the specimen, with the weld in contact with the mandrel, to such a depth that the angle of engagement between mandrel and specimen reaches 60 0 (Refer Fig. 6.2.7 of this specification). If the combination of diameter and wall thickness of pipe, and radius of mandrel is such that the angle of engagement does not reach 60 0 the mandrel shall be plunged into the specimen until opposite walls of the specimen meet. Acceptance Criteria A specimen which fractures completely prior to the specified engagement of mandrel and specimen, or which reveals cracks or ruptures in the weld or heat affected zone (HAZ) longer than 4mm, shall be rejected. Cracks less than 6mm long at the edges of the specimen shall not be cause for rejection. Dye penetrant testing may be used to positively confirm cracks or openings. 7.0 DIMENSIONS, WEIGHTS, LENGTHS, DEFECTS, AND END FINISHES 7.1 Measuring equipment for inspection and testing shall be selected such that it has a resolution and accuracy at least five times (5 X) finer than tolerance of the parameter being measured. Similarly, standards against which a piece of equipment is caliberated shall be at least five times as accurate as the equipment being calibrated. 7.2 Diameter Only measuring equipments which can be demonstrated to have previously calibrated satisfactorily and still be within its documented calibration period (interval) shall be used for inspection and testing. Note : These requirements apply to all inspections and tests performed to verify compliance with this specification (not only dimensions and weights). Pipe Body The outside diameter of pipe body (for welded pipes), as determined by taping the circumference, shall not deviate by more than the value given in Table E - 6B and E-6C Appendix E. API Spec. 5L Table-7 stands modified accordingly. Pipe Size Tolerance ≥ 4½” and < 20” : ± 0.75% of specified OD or ± 3 mm whichever is smaller ≥ 20” and ≤ 36” : + 3 mm, -0.25% of specified OD > 36 : ± 3mm Pipes Ends Diameter tolerances for the pipe ends indicated in API Spec. 5L Table-8 shall be applicable on the inside diameter for pipe sizes ≥ 14” and on outside diameter for pipe sizes ≤ 12”. The specified inside diameter, based on circumferential measurement, over a length of 100 mm from the end shall comply with the tolerances specified in API Spec. 5L. Specified inside diameter is defined as ID = ( OD - 2WT) where ID, OD & WT are the specified inside diameter, specified outside diameter and specified wall thickness respectively. GAIL (INDIA) LIMITED CARBON STEEL LINE PIPES GAIL-TS-LINEPIPE-CS Page 9 of 37
Out of Roundness Out of Roundness i.e., the difference between the maximum and minimum diameter (inside for pipe size ≥ 14” and outside for pipe size ≤ 12”) at pipe ends shall comply with the following limits. Out of roundness tolerance indicated at API Spec 5L Table 8 stands deleted. Pipe Size Tolerance ≤ 10¾” : 3mm (Note “a” of API Spec. 5L Table 8 applicable) ≥ 12¾” : 5mm (Note “a” of API Spec. 5L Table 8 applicable) Each pipe shall be measured for conformance to above requirements. All dimensions and tolerances shall be measured and recorded at least 3 times per operating shift (12 hrs maximum). 7.3 Wall Thickness 7.5 Length In addition to API requirements, the wall thickness of each pipe shall be checked along the circumference at both ends and at the mid location of pipe body at 12 o’clock, 3 o'clock, 6 o'clock and 9 o'clock positions. The wall thickness tolerances shall comply the requirements of this specification. The tolerances on specified wall thickness shall be (+) 10 % and (-) 5 %. However, in case of EW pipes, specified wall thickness tolerance up to (+) 15 % for a distance of 25 mm on either side of longitudinal weld seam is also acceptable. API Spec. 5L Table 9 stands cancelled. Wall thickness measurements shall be recorded at least 3 times per operating shift (12 hours maximum). All pipes shall be supplied with length between 11.5m and 12.5m. The minimum average length of the entire order shall be 12.0m. API Spec. 5L Table - 11 shall not be applicable. Each pipe shall be measured for conformance to above requirements and all measurements shall be recorded. The minimum overall length tolerance shall be (-) zero and (+) one pipe length to complete the ordered quantity for each size , each grade & each wall thickness. 7.6 Straightness 7.7 Jointers The deviation from a straight line for all pipe sizes shall not exceed 20 mm. Each pipe shall be checked for conformance to the requirements. Straightness shall be measured and recorded at least 3 times per operating shift (12 hours maximum). Jointers on pipes are not permitted. 7.8 Workmanship And Defects 7.8.1 Dents Allowable dent size shall be as per API Spec. 5L. Disposition of dents shall be carried out in accordance with API Spec. 5L para 9.9 (c) or (d). Dents on weld and Heat Affected Zone (HAZ) are not acceptable. GAIL (INDIA) LIMITED CARBON STEEL LINE PIPES GAIL-TS-LINEPIPE-CS Page 10 of 37
Page 1 and 2: JLPL ESSAR OIL LPG PIPELINE CONNECT
Page 3 and 4: SPECIAL CONDITIONS OF CONTRACT The
Page 5 and 6: 2.6.3 Deduction at Source 2.6.3.1 P
Page 7 and 8: 6.3 The materials, design, and work
Page 9 and 10: (iv) The Contractor shall adhere to
Page 11 and 12: 6.24 Insurance (For option - II & I
Page 13 and 14: GAIL (INDIA) LIMITED TABLE OF CONTE
Page 15 and 16: 3.4 Repair of defects on pipes reco
Page 17 and 18: 4.0 SCOPE OF SUPPLY 4.1 Material to
Page 19 and 20: all damages occurring and/or noted
Page 21 and 22: GAIL (INDIA) LIMITED Material Requi
Page 24 and 25: JLPL ESSAR OIL LPG PIPELINE CONNECT
Page 26 and 27: CONTENTS Sl. No. Description 1.0 SC
Page 28 and 29: 5.1.2 Welding Process 5.1.2.1.1 Con
Page 30 and 31: LSAW pipes shall be mechanically co
Page 32 and 33: 6.2.5 The minimum elongation of bas
Page 36 and 37: 7.8.2 Offset of Plate Edges 7.8.3 7
Page 38 and 39: 9.2.1 Heat Analysis Where the steel
Page 40 and 41: 9.8 Non - Destructive Inspection 9.
Page 42 and 43: 9.8.5.1.1 (New) Seamless Pipe : 45
Page 44 and 45: Location SEL - 072 Lamination Accep
Page 46 and 47: 12.3 (New) 12.4 (New) hard copy rec
Page 48 and 49: B.1.2 Weld Seam of Welded Pipe APPE
Page 50 and 51: APPENDIX - F SUPPLEMENTARY REQUIREM
Page 52 and 53: Representative. SR 17.3 Acceptance
Page 54 and 55: ANNEXURE - I (NEW) MANUFACTURING PR
Page 56 and 57: (2) of these specimens shall be tes
Page 58 and 59: FIGURE 6.2.6.1 GAIL (INDIA) LIMITED
Page 60 and 61: FIGURE 6.2.6.2(b) GAIL (INDIA) LIMI
Page 62 and 63: FIGURE 7.8.3 GAIL (INDIA) LIMITED C
Page 64 and 65: CONTENTS SL NO. DESCRIPTION 1.0 SCO
Page 66 and 67: 13 ASTM G-42 : Tentative Methods fo
Page 68 and 69: week prior to its use, to establish
Page 70 and 71: Sl. No. Properties Units Requiremen
Page 72 and 73: (i) Details of plant(s), locations,
Page 74 and 75: A batch representing a normal produ
Page 76 and 77: (iii) Adhesive Layer Thickness Adhe
Page 78 and 79: (i) Surface cleanliness, surface ro
Page 80 and 81: specification. 8.6.2 The pipe tempe
Page 82 and 83: decision on rejection or re-blastin
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and/ or as per COMPANY representati
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9.2.11 Coating and/ or adhesive sha
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(iii) In case the above tests do no
Page 90 and 91:
10.11 Cathodic Disbondment Test (i)
Page 92 and 93:
11.6 The lorries used for transport
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All repairs carried out to coating
Page 96 and 97:
COATING SYSTEM/ MATERIAL PREQUALIFI
Page 98 and 99:
TABLE - 2 S.No Properties Frequency
Page 100 and 101:
Name of bidder PRICE SCHEDULE FOR S
Page 102 and 103:
ITEM NO OF MR ENCLOSURE TO PRICE SC
Page 104 and 105:
Notes Price Schedule for the Coatin
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Notes Place of taking delivery of p
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JLPL ESSAR OIL PIPELINE CONNECTIVIT
Page 114 and 115:
ITEM NO OF MR ENCLOSURE TO PRICE SC
Page 116:
PRICE SCHEDULE FOR COATED LINE PIPE
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Volume-II - GAIL

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