Piping Welding

ClauseDetails
WLD-FAB-001Applicable codes for welding are ASME B31.3, ASME Boiler and Pressure Vessel Code.
WLD-FAB-002In India, additionally IBR Regulations Apply.
WLD-FAB-003Normally in hydrocarbon insustry, Carbon Steel, Alloy Steel and Stainless Steel are the base materials to be welded.
WLD-FAB-004Welding consummables include Electrodes, Filler Wires, Argon gas etc.
WLD-FAB-005Quality of welding consummables must be ensured as per Project Welding Specification.
WLD-FAB-006Argon gas shall be 99.995 Percent Pure.
WLD-FAB-007Welders must be qualified as per applicable code e.g. B31.3
WLD-FAB-008All the welding equipment like transformers, thermocouples, pyro-meters, automatic temperature recorders, heat treatment equipmets etc. is provided by welding contractor.
WLD-FAB-009All the weld testing equipment like radiographic equipments, radiographic films, darkroom facilities, dye-penetrant testing, magnetic particle testing, ultrasonic testic etc. are provided by the welding contractor.
WLD-FAB-010Generally used welding processes are SMAW and GTAW.
WLD-FAB-011SMAW : Shielded Metal Arc Welding Process
WLD-FAB-012GTAW : Gas Tungsten Arc Welding Process
WLD-FAB-013Which welding process to be emplyed where is given in Project Welding Specification.
WLD-FAB-014Edge preparation procedure required to be carried out for different types of base materials.
WLD-FAB-015Cleaning of the edge is necessary.
WLD-FAB-016After cleaning, edges are aligned and properly spaced. Tack welding, if required is done.
WLD-FAB-017Workpieces need to be protected form weather during welding.
WLD-FAB-018Proper welding technique is usually specified in Project Welding Specification.
WLD-FAB-019Welding procedure qualification record should be submitted by Welding Contractor to the Client.
WLD-FAB-020Preheating and Post Weld Heat Treatment need to be carried out as per Project Weldng Specification.
WLD-FAB-021After welding and PWHT, Inspection and Testing of welds is done as per various testing and inspection methods specified in Project Welding Specification.
WLD-FAB-022Repairs of welds may be done if defects are within certain limits.
WLD-FAB-023Contractor has to submit various documents related to welding work done by him.

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