Purpose of welding process evaluation: 1. Assess whether the welding unit is capable of welding joints that meet the requirements of relevant or industry standards and technical specifications; 2. Verify whether the welding process rules (WPs or PWPs) formulated by the welding unit are correct. 3. Provide a reliable technical basis for formulating formal welding process books or welding process cards. Scope of application of welding process evaluation: 1. It is suitable for the manufacture, installation and maintenance of steel equipment such as boilers, pressure vessels, pressure pipes, bridges, ships, spacecraft, nuclear energy and load-bearing steel structures. 2. Suitable for gas welding, electrode arc welding, tungsten argon arc welding, melting gas shielded welding, submerged arc welding, plasma arc welding, slag welding and other welding. The welding evaluation unit shall keep the technical files related to the evaluation of the welding process and the silent specimen of the welding process evaluation until the welding process fails. Standard for Process Evaluation Domestic Standard 102NB/T47014-201102 “Evaluation of Welding Process for Pressure Equipment” 202G236-9802 “Field Equipment, Industrial Pipe Welding Engineering Construction and Pressure Pipeline Process Assessment” 3 “Steam Boiler Safety Technical Supervision Regulations (1996)” Note: Lifting industry process evaluation borrows this standard 402SY/T0452-2002 “Petroleum and gas pipeline welding process evaluation” (note: for petroleum, chemical process evaluation) 502G661-200102 “Steel structure welding specification” (note: highway and bridge process evaluation can be carried out with reference) 602SY/T4103-2006 “Steel pipe welding and acceptance” 7.JB4708-2000 “Steel pressure vessel welding process evaluation”. European standard EN0228802 or ISO021560702-02 ISO021560702-02 ISO0215614 Series Arc Welding and Air Welding of Steel/Arc Welding of Nickel and Nickel Alloys ISO15614-2 Arc Welding of Aluminum and Aluminum Alloys ISO15614-3 Cast Iron Arc ISO15614-4 Repair Welding of Cast Aluminum ISO15614-5 Titanium and Titanium Alloys Arc Welding/ Arc Welding of Zirconium and Zirconium Alloys ISO15614-6 Arc Welding of Copper and Copper Alloys ISO15614-7 Surfacing Welding ISO15614-8 Welding of Pipe Joints and Plate Joints 1. AWSD1.1/D1.1M: 200502 Steel Structure Welding Procedure D1.2/D1.2M: 200302 Aluminum Structure Welding Procedure D1.3-9802 Sheet Steel Structural welding procedure D1.5/ D1.5M: 200202 bridge welding D1. 6:199902 stainless steel welding D14.3/D14.3M: 200502 crane welding procedure evaluation process: 1, preparation of preliminary welding process book 2, welding specimen and preparation specimen 3, inspection specimen and specimen 4, measuring whether the welded joint meets the performance required by the standard 5, proposed The welding process evaluation report evaluates the proposed welding process book. The number of welding process evaluation specimens is two groups. When the two groups of macro (appearance) tests fail, the welding process is judged to be unqualified; if one of the other inspection items fails, it is judged that the welding process is unqualified.