Pipelaying Tender-VOL II - WorleyParsons.com

EPMC SERVICES FOR REWARI – KANPUR PIPELINESPECIFICATION FOR WELDING ON ONSHORE PIPELINE25. REPAIR OF WELDSThe system for reporting defects shall be such that defects can be identified quickly and areaccurately located.All the repairs shall be carried out in accordance with API 1104 and approved Repair procedures bythe OWNER.The decision to proceed with repair in each instance shall be approved by the OWNER.The defects shall be removed by grinding, machining or arc-air gouging only. Arc-air gouging shallbe performed in accordance with the procedures approved by the OWNER and only by thepersonnel who are competent to perform such work.Arc air gauging is not permitted on pipe less than 10mm thick.The cavity shall be finished by grinding to a bright and smooth finish with a tapered entry and exitprofile. The length of the cavity shall be 50mm minimum.If repair excavations are less than 10mm apart they shall be linked into a single repair.Repair shall be attended two times maximum. If the 2nd time attempt fails to meet the requirementsthe weld shall be cut and re-welded.Weld repairs to the pipe body or to the body of fittings or bevels are not permitted. Single passrepairs are not permitted.The root repair from inside shall not be permitted.The total length of repair shall not be exceeds 40% of total weld length. For individual root repairthe length shall not be exceed 20% of the total weld length and for partial penetration repair theindividual length shall not be exceed 30% of the total weld length. If the above exceeds the jointshall be cut and re-welded.Repair procedures shall be qualified in accordance with regard of paragraph 7.3.2 of thisspecification.n:\513-mh-2145-rkpl\11 engineering\11.8 pipelines\06 spec\specification for welding on onshorepipeline\mh2145-c000-pl-spc-0020.docMH2145-C000-PL-SPC-0020 RevA Page 36 of 42