Pipelaying Tender-VOL IV - WorleyParsons.com

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EPMC SERVICES FOR REWARI – KANPUR PIPELINE SPECIFICATION FOR CONCRETE WEIGHT COATING 12. WEIGHING 12.1 The test specimen shall be selected at equal intervals during the course of production. 12.2 CONTRACTOR shall weigh each pipe when dry prior to shipment and 28 days after placing of concrete and mark the weight with paint on the inside of the pipe. n:\513-mh-2145-rkpl\11 engineering\11.8 pipelines\06 spec\specification for concrete weight coating\mh2145- c000-pl-spc-0014.doc MH2145-C000-PL-SPC-0014 RevA Page 18 of 23
EPMC SERVICES FOR REWARI – KANPUR PIPELINE SPECIFICATION FOR CONCRETE WEIGHT COATING 13. INSPECTION AND TEST 13.1 Before concrete coating the pipe shall be pre -tested at a pressure equivalent to 95% of SMYS of pipe material. The test pressure shall be held for a period of 6 hours & reading logged at equal intervals. During the Test CONTRACTOR check all welds for leakage. Failure if any during the test shall be rectified by the CONTRACTOR. 13.2 After curing, every length of concrete coated pipe shall be non-destructively tested by suitable means such as "ringing" to determine if any suspected defects are present. In case this indicates faulty coating, cores shall be removed from coating and inspected. When defective coating appears from cores, the concrete coating shall be removed from the pipe lengths. 13.3 Every length of concrete coated pipe shall be checked to verify insulation between steel reinforcement and pipe by means of a megger or equivalent device. For this purpose provisions should be made during placing of concrete such as to leave atleast a point of exposed steel reinforcement whenever the latter shall terminate inside of concrete coating. 13.4 During the tests above and before transporting of concrete coated pipes, every pipe length shall be visually inspected to detect whether any damages and/or defects are present. Possible damages and/or defects with their allowable limits are described at following section. Repairable concrete coating shall be clearly marked while the nonrepairable ones shall be removed from the pipe lengths. n:\513-mh-2145-rkpl\11 engineering\11.8 pipelines\06 spec\specification for concrete weight coating\mh2145- c000-pl-spc-0014.doc MH2145-C000-PL-SPC-0014 RevA Page 19 of 23
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Pipelaying Tender-VOL IV - WorleyParsons.com

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