Welding procedure qualification procedure
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(1) Recheck the welding rod and steel material sheets, and conduct retests on chemical composition and mechanical properties if necessary. (2) Assessing the weldability of steel: The carbon equivalent formula recommended by the International Welding Society is: Cqe = C + Mn/6 + Si/6 + Cr/5 + Mo/5 + V/5 + Ni/15 + Cu/15. (3) Understanding the welding characteristics of steel. (4) Selecting welding materials and determining the welding method. (5) Design the joint type and groove dimensions. (6) Determine the welding wire energy and other welding parameters. (7) Determine the welding specification parameters. (8) Determine the welding position. Plates can replace tubes, and tubes can replace plates. (9) Determine the protection method for the welding process. (10) Requirements for the welding process in terms of operational techniques. (11) Specifications and requirements for preheating, interlayer temperature, post-heating, and post-weld heat treatment. (12) Welded test pieces and test piece inspection (13) Welding procedure qualification reports. If newly registered special equipment manufacturing and lifting machinery factories (or companies) need technical support, please contact me.
Based on the welding properties of the metal material, and in accordance with the specifications in the design documents and the manufacturing processes, a pre-welding procedure is established: welding test pieces – inspection of welded joints – preparation of samples – mechanical property tests – formulation of a process evaluation report.
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The weld evaluation of pressure vessels also requires verification by the local inspection authority.
The welding procedure qualification process does not require supervision and verification by a local inspection agency. The registration for the use of pressure vessels and the TS mark for factory inspection require verification by local supervision and inspection agencies.
Our inspection agency is required to stamp the steel on the weld evaluation specimens and sign to confirm the weld evaluation report.
Does the inspection agency need to stamp the weld evaluation specimens and sign to confirm the weld evaluation report? Please check in accordance with clause 4.2.1 (4) of TSG R0004-2009, \"Technical Inspection Regulations for the Safety of Fixed Pressure Vessels\": the welding procedure qualification and welding procedure specifications shall be reviewed by the welding supervisor of the manufacturing (welding) unit, approved by the technical director, and after being signed off by the inspection personnel, stored in the technical archives
What is being implemented now is in accordance with the provisions of 6.2.2.1 of TSG21-2016.