Volume-II of IV - GAIL

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7.4.4 Chemical Pre-Treatment 7.4.4.1 Phosphoric Acid Wash followed by De-ionised Water Wash The procedure to apply the chemical pre-treatment viz. phosphoric acid wash followed by de-ionised water wash shall be in accordance with the recommendation of the manufacturer and shall result in intended cleaning requirements of this specification. Working solution preparation, maintaining concentration, application procedure including method of spreading, spreading rate, drying times, etc. depending upon the cleanliness/ temperature of the incoming pipe and the line speed shall be established. Temperature of the chemical, pipe pre-heat temperature vs line speed vs dwell time, rinsing procedure, testing & control, rectificatory measures, drying procedure etc. shall be clearly established during PQT. Also the quality of the deionised water shall be established during PQT. 7.4.4.2 Chromate Treatment The procedure to apply the chromate treatment shall be in accordance with the recommendation of the manufacturer. Working solution preparation, maintaining concentration, application procedure including method of spreading, spreading rate, drying times, etc. depending upon the temperature of the incoming pipe and the line speed shall be established. Temperature of the chemical, pipe preheat temperature vs line speed, pipe heating after chromating and time limit within which the pipe to be heated, testing & control, rectificatory measures, shall be clearly established during PQT. 7.4.5 Coating Application The COMPANY Representative will check the correctness of each coating application operation, values of the main parameters of each operation, preheating pipe surface temperature prior to epoxy powder application temperature, line speed, fusion bonded epoxy curing time, temperature and flow rate of copolymer adhesive and polyethylene etc. and the same shall be recorded. These values shall be complied with during regular production. 7.5 Qualification of Applied Coating 7.5.1 Tests on pipe coated partly with epoxy and partly with epoxy & adhesive Layers a. Degree of Cure Epoxy film samples (min 4 Nos.) shall be scrapped from the coated pipe using hammer and cold chisel and the samples shall be taken for cure test using Differential Scanning Calorimatry (DSC) procedure. Care shall be taken to remove the samples of full film thickness avoiding inclusion of \\Akjha\work contrac\standard TS for Pipe Line WC (Vol-II) MASTER FOLDER\14 3-layer pe coated line pipe\3-LPE Coating of Linepipes-TS-R2 14.doc Page 11 of 35
steel debris. Glass transition temperature differential (∆Tg) and % cure (∆H) shall comply the specified requirements. b. Epoxy Layer Thickness Epoxy layer thickness shall be checked at every one meter spacing at 3, 6, 9 and 12 o’clock positions. The thickness shall comply the specified thickness requirements. c. Adhesive Layer Thickness Adhesive layer thickness shall be checked at every one meter spacing at 3, 6, 9 and 12 o’clock positions. The thickness shall comply the specified thickness requirements. d. Holiday Inspection Entire pipe shall be subject to holiday inspection and the test voltage shall be set to exceed 5 v/micron of epoxy thickness specified for the portion coated only with epoxy layer. e. Adhesion Test i) Adhesion Test (24 hrs or 48 hrs) shall be carried out on the epoxy coated pipe. Test method, no. of test specimen and acceptance criteria shall comply CSA Z.245,20-98, Table 4. ii) Adhesion of FBE shall also be separately determined at ambient temperature at two locations by the “St Andrews Cross” method and the test shall comply with the specified requirements. f. 2.5° Flexibility Test 2.5° Flexibility test shall be carried out on the epoxy coated pipe at test temperature of 0°C. Test method, no. of test specimen and acceptance criteria shall comply CSA Z.245,20-98, Table-4. g. Cross-section & Interface Porosity Test Cross section porosity and interface porosity tests shall be carried out on the epoxy coated pipe. Test method, no. of test specimen and acceptance criteria shall comply CSA Z.245,20-98, Table-4. 7.5.2 Tests on pipes coated only with all three layers a. Bond Strength Three test pipes shall be selected for bond strength tests. On each of the selected pipes, three bond strength test shall be performed for each \\Akjha\work contrac\standard TS for Pipe Line WC (Vol-II) MASTER FOLDER\14 3-layer pe coated line pipe\3-LPE Coating of Linepipes-TS-R2 14.doc Page 12 of 35
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GAIL (India) Limited TENDER DOCUMEN
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D:\old data\FATEH\IDPL_Dholpur\SCC\
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MECON LIMITED REGD. OFF: RANCHI (BI
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MECON LIMITED REGD. OFF : RANCHI (B
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Pipe Size, Out Side Diamter- Inches
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SPECIFICATION FOR HYDROSTATIC TESTI
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0 C C; \ts\Tender-A,4.doc. TABLE -
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0 C C; \ts\Tender-A,4.doc. TABLE -
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SPECIFICATION FOR MAJOR WATER CROSS
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SPECIFICATION FOR PIPING FABRICATIO
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Pipe Size, Outside diameter Inches
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CONTENTS Sl. Description Page No. N
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1.0 GENERAL 1.1 These technical spe
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completion and testing on system ar
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5.1.2 Mill scale, rust, rust scale
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5.2.3 Maual or hand tool cleaning M
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c. Ingredients shall be kept proper
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the bottom. This work shall be done
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S. NO. DESCRIPTION 1. MANUAL OR HAN
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S. NO. DESCRIPTION 3. BLAST CLEANIN
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6.0 PAINT MATERIALS Paint manufactu
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PAINT MATERIALS TABLE NO.: 6.2FINIS
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Notes: 1. Covering capacity and DFT
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TABLE 7.1: PRE-ERECTION/ PRE-FABRIC
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NOTE 2 : FOR EXTENAL SURFACE OF RCC
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TABLE 10.0: FIELD PAINT SYSTEM FOR
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TABLE 12.0 : FIELD PAINT SYSTEM FOR
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TABLE 14.0 : PAINTING UNDER INSULAT
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17.0 STORAGE 17.1 All paints and pa
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. Intersection points & change of d
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20.3 Method of Camouflaging 20.3.1
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it would be in the interest of the
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24.5 Tests required for evaluation
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S. No. MANUFACTURER NAME LIST OF RE
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S. No. MANUFACTURER NAME LIST OF RE
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S. NO. LIST OF RECOMMENDED MANUFACT
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SPECIFICATION FOR REPAIR OF PIPELIN
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MECON LIMITED DELHI PROCESS & PIPIN
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SPECIFICATION FOR DOCUMENTATION FOR
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1.0 SCOPE 1.1 This specification co
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2.3 Monthly • Priced variations
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- Major water crossings - Waste dis
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- Location of further appurtenance
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Document2 SPECIFICATION FOR PIPELIN
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Page 382 and 383: 1.0 SCOPE TABLE OF CONTENTS 2.0 COD
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Page 386 and 387: 10.0 GASKETS 10.1 Spiral wound meta
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Page 398 and 399: determination of surface profile -
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Page 404 and 405: 4.3 Application Procedure for Corro
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Page 408 and 409: SPECIFICATION FOR 3-LAYER POLYETHYL
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Page 412 and 413: y. CSA Z245.20-98 : External Fusion
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Page 416 and 417: 5.3.3 Properties of Coating System
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Page 438 and 439: 11.3 The CONTRACTOR shall load, unl
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MECON LIMITED Delhi PROCESS & PIPIN
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SPECIFICATION FOR PIPELINE PRE-COMM
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C O N T E N T S Clause No. Title Pa
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Above 250 & upto 500 - Deploy one q
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e. Fabricated steel structurals, pi
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4.0 DETAILS OF HSE MANAGEMENT SYSTE
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RELEVANT IS-CODES FOR PERSONNEL PRO
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2.0 MONTHLY CHECKLIST CUM COMPLIANC
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MONTHLY CHECKLIST CUM COMPLIANCE RE
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MONTHLY CHECKLIST CUM COMPLIANCE RE
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ANNEXURE-B Format-3 3.0 ACCIDENT RE
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5.0 MONTHLY Health, Safety & Enviro
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OBSERVATION OF QUALITY ASPECTS Job
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SPECIFICATION FOR CALIPER PIGGING S
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1.0 INTENT 2.0 OBJECTIVE SPECIFICAT
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6.0 GAUGE PIG RUN Contractor to car
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- Valves or any partially closed va
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geometry inspection to generate val
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PIPELINE DETAILS NOMINAL DIAMETER m
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CONTENTS Sl.No. Description Page No
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) SIS - 055900 : Pictorial surface
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Property Test Method Condition Requ
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35mm The sleeve shall be installed
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4.1 General a) The application proc
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4.3 Procedure a) The application pr
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5.2.3 All the coated joints shall b
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8.0 REPAIR OF PIPE COATING DEFECTS
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MECON LIMITED REGD. OFF RANCHI PROC
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PROCESS & PIPING DESIGN SECTION MEC
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PROCESS & PIPING DESIGN SECTION MEC
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C O N T E N T S Sl.No. Description
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e measured. Hence the depth of meas
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6.7 Graphical representation of exi
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GAIL (India) Limited TECHNICAL SPEC
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1.0 SCOPE Cathodic Protection Power
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limit feature shall be provided in
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e) Pipeline under protected f) Auto
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- Dimensional checking - Proper mou
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Volume-II of IV - GAIL

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