Pipelaying Tender-VOL II - WorleyParsons.com

EPMC SERVICES FOR REWARI – KANPUR PIPELINESPECIFICATION FOR WELDING ON ONSHORE PIPELINECONTENTS1. GENERAL ........................................................................................................................... 52. REFERENCE DOCUMENTS ............................................................................................. 62.1 Codes and standards .......................................................................................................... 62.2 Other Standards / specifications ......................................................................................... 62.3 Document precedence ........................................................................................................ 72.4 Specification Deviation/Concession Control ....................................................................... 72.5 Quality Assurance/Quality Control ...................................................................................... 73. WELDING EQUIPMENT, TOOLS AND SUPPLIES .......................................................... 94. PIPELINE MATERIALS .................................................................................................... 105. ELECTRODES, FILLER WIRES AND FLUXES ............................................................. 116. SHIELDING GASES ......................................................................................................... 127. QUALIFICATION OF WELDING PROCEDURES ........................................................... 137.1 General ............................................................................................................................. 137.2 Records ............................................................................................................................. 147.3 Welding Procedure Specification (WPS) .......................................................................... 147.3.17.3.27.3.3Welding Procedure Qualification Testing (WPQT) ....................................................... 15Qualification of Repair Weld Procedure ....................................................................... 16Weld Procedure Approval ............................................................................................ 168. WELDER QUALIFICATION ............................................................................................. 179. PRODUCTION WELDING ............................................................................................... 189.1 Cleaning and Pipe Bevelling ............................................................................................. 189.2 Alignment of Pipe .............................................................................................................. 189.3 Pre-Heating and Interpass Temperature and Post-Weld Heat Treatment (PWHT) ......... 199.4 Tack Welds ...................................................................................................................... 199.5 Line-up Clamps ............................................................................................................... 209.6 Working Clearance .......................................................................................................... 2010. AUTOMATIC WELDING .................................................................................................. 21n:\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 3 of 42