Is a certified welder required for welding evaluation test pieces in a pressure vessel factory?

Hello, if your assessment process part is a pressure-bearing part, it must be welded by a certified welder.

"Technical Safety Supervision Regulations for Fixed Pressure Vessels" TSG R0004—2009

4.2.2 Welders and their stamps

(1) Engaged in pressure vessel welding operations Personnel (hereinafter referred to as welders) must pass the assessment in accordance with the relevant safety technical regulations and obtain the "Special Equipment Operator Certificate" for the corresponding project before they can undertake welding work within the scope of the qualified project within the validity period;

(2) Welders shall weld in accordance with the welding procedure specification (WPS) or welding operation instructions and keep welding records, and the inspection personnel of the manufacturing unit shall inspect the actual welding process parameters;

< p>(3) The welder code stamp should be stamped on the designated part near the weld of the pressure component of the pressure vessel, or the welder code should be recorded in the welding record (including weld layout diagram), and the welding record should be included in the product quality certification document;

(4) The manufacturing unit shall establish welder technical files.

4.2.2 Welders and their stamps

(1) Personnel engaged in pressure vessel welding operations (hereinafter referred to as welders) shall pass the assessment in accordance with the relevant safety technical regulations and obtain the corresponding Only after obtaining the project's "Special Equipment Operator Certificate" can they perform welding work within the scope of the qualified project within the validity period;

(2) Welders shall follow the welding procedure specifications (WPS) or welding operation instructions Welding is performed and welding records are kept, and the inspection personnel of the manufacturing unit should check the actual welding process parameters;

(3) The welder code should be stamped on the designated part near the weld of the pressure component of the pressure vessel. Stamp, or record the welder code in the welding record (including weld layout diagram), and the welding record shall be included in the product quality certification document;

(4) The manufacturing unit shall establish a welder technical file.

4.3.2 Preparation requirements for product welding test pieces

(1) The product welding test piece should be welded simultaneously with the barrel section at the extended part of the longitudinal weld of the barrel section (spherical pressure Except for vessels and forge-welded pressure vessels);

(2) The raw materials of the test pieces must be qualified and have the same standard, same grade, same thickness and same heat treatment status as the pressure vessel materials;

< p>(3) The test piece shall be welded by the welder who welds the pressure vessel using the same conditions and welding process as the welding pressure vessel. For pressure vessels that require heat treatment, the test piece shall generally be heat treated together with the pressure vessel, otherwise it shall be Measures shall be taken to ensure that the test pieces are heat treated according to the same process as the pressure vessels;

(4) The number of product welding test pieces prepared for each pressure vessel shall be determined by the manufacturing unit according to the material, thickness, structure and The welding process shall be determined in accordance with the design drawings and the standards quoted in this regulation.