Volume-II of IV - GAIL

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MECON LIMITED Delhi PROCESS & PIPING DESIGN SECTION TECHNICAL SPECIFICATION FOR TEMPORARY CATHODIC PROTECTION SYSTEM TECHNICAL SPECIFICATION NO. : MEC/TS/05/62/016A REV-1 Page 11 of 19 Alternatively, owner on its own discretion may permit use of Magnesium / Zinc galvanic anodes for protection of insulating joints. Choice between Magnesium or zinc anodes shall depend upon the potential valves on either side of the insulating joint. These anodes shall be sized for the specified design life of permanent cathodic protection system. 6.4.5 The total system including cables, cable termination, anodes/ surge divertors shall be suitable for the anticipated fault current at the location of installation. 6.4.6 Unless otherwise specified on data sheet, the minimum rating of grounding cells, polarisation cells and surge diverters shall be as below: (i) Grounding Cell - Type : Zinc, 2 or 4 plate type - Current rating : Suitable to pass more than 10kA surge (ii) Polarisation cell - Type : Solid state or Electrolytic multiple pairs S.S plats type ground - Rating : Suitable to pass 5KA or more surge (iii) Spark Gap Arrester - Type : Spark gap - Current, 8/20 wave : 100 kA - Spark over AC voltage: - 50 Hz : 1 kV - Impulse (1.2/50) : 2.2 kV micro sec) 6.4.7 The grounding cell, spark gap arresters, and polarisation cell system shall be sized for the design life of permanent CP system. The zinc or magnesium anodes meant for pipeline grounding shall also be sized for the life of the permanent CP system taking into account the current discharge from the anodes. The grounding system shall have minimum resistance to earth to restrict the pipeline voltage as per NACE criteria. 6.4.8 In case of HT transmission overhead lines of voltage below 66KV also requisite mitigation measures should be provided to take care of continuous induction of voltage interface due to presence of transmission line in close proximity. 6.5 CP at Cased Crossing At cased crossings where casing is coated, the casing shall be protected by sacrificial anode installations. The sacrificial anode installations shall be provided at both ends of D:\old data\FATEH\MP Region\Kailaras\Tender RFQ\TCP&PCP\Temporary Cathodic Protection - 016A-R1.doc
MECON LIMITED Delhi PROCESS & PIPING DESIGN SECTION TECHNICAL SPECIFICATION FOR TEMPORARY CATHODIC PROTECTION SYSTEM TECHNICAL SPECIFICATION NO. : MEC/TS/05/62/016A REV-1 Page 12 of 19 6.6 Painting 6.7 Cables casing. The anode installation shall be sized based on permanent C.P. design parameters specified for the main pipeline. The carrier pipe inside the casing shall be protected by zinc ribbon anodes well connected to the outer surface of bottom of carrier pipe extending upto hour hand positions of 4 and 8 o'clock. The anodes shall be placed at close intervals as per design parameters calculations and sized based on the permanent CP design parameters. The sheet steel used for fabrication shall be thoroughly cleaned and degreased to remove mill scale, rust, grease and dirt. Fabricated structures shall be pickled and then rinsed to remove any trace of acid. The under surfaces shall be prepared by applying a coat of phosphate paint and a coat of yellow zinc chromate primer. The under surfaces shall be free from all imperfections before undertaking the finished coat. After preparation of the under surface, spray painting with two coats of final paint shall be done. The finished panel shall be dried in oven in dust free atmosphere. Panel finish shall be free from imperfections like pin holes, orange peels, run off paint, etc. All unpainted steel parts shall be cadmium plated to prevent rust information. Cables shall be annealed high conductivity, tinned, stranded copper conductor, XLPE insulated 650/1100 V grade, armoured, PVC sheathed. The size of the copper conductor shall be 6 sq mm for anode cable from anode to buried junction box, 10 sq mm from junction box to test station, 10mm² from test station to pipeline. The size of the conductor shall be 6 sq mm for potential measurement, 10 sq.mm for current measurement and 25mm² for bonding, polarisation cell/grounding cell and surge diverter connection purpose. The anode cable from anode to junction box (buried) shall be unarmoured. The length of anode tail cable shall be sufficient enough to reach junction box (buried) in case of temporary CP anodes and up to test station in case of permanent CP sacrificial anodes. PE Sleeves shall be provided for unarmoured cables. 7.0 INSTALLATION 7.1 Cable Laying 7.1.1 Cables shall be laid in accordance with approved layout drawings to be prepared by the contractor. No straight through joint shall be permitted in a single run of cable. Cable route shall be carefully measured and cables cut to required length. 7.1.2 All cables inside station/plant area shall be laid at a depth of 0.75 M. Cables outside station/plant area shall be laid at a depth of 1.5m. Cables shall be laid in sand under D:\old data\FATEH\MP Region\Kailaras\Tender RFQ\TCP&PCP\Temporary Cathodic Protection - 016A-R1.doc
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GAIL (India) Limited TENDER DOCUMEN
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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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\\Akjha\work contrac\standard TS fo
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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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SPECIFICATION FOR VENTS, DRAINS AND
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1.0 SCOPE TABLE OF CONTENTS 2.0 COD
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The last letter indicates type of m
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10.0 GASKETS 10.1 Spiral wound meta
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13.7 Unless specified otherwise. Va
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determination of surface profile -
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) Peel Strength shall be as follows
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accordance with ISO:8503-3 or ISO:8
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4.3 Application Procedure for Corro
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Company Representative reserves the
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SPECIFICATION FOR 3-LAYER POLYETHYL
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1.0 SCOPE This specification covers
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y. CSA Z245.20-98 : External Fusion
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which failed. If all tests pass, th
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5.3.3 Properties of Coating System
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health and safety sheets and manufa
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7.4.4 Chemical Pre-Treatment 7.4.4.
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specified temperature i.e. one at e
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• Any time when in COMPANY’s op
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8.6.4 After the de-ionised water wa
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8.13.4 The CONTRACTOR shall check t
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i. Electrostatic application of epo
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9.2.12 Failure to comply with any o
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area on the pipe shall show presenc
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10.10 Epoxy Layer Adhesive Test a.
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11.3 The CONTRACTOR shall load, unl
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• Damages caused to coating by ha
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14.6 The CONTRACTOR’s Quality sys
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Table - 1 Manufacturers Data on Coa
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MECON LIMITED Delhi PROCESS & PIPIN
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PROCESS & PIPING DESIGN SECTION MEC
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PROCESS & PIPING DESIGN SECTION MEC
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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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- Dimensional checking - Proper mou
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Volume-II of IV - GAIL

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