Welders engaged in municipal public works construction must hold welder certificates for boilers, pressure vessels and pressure pipelines issued by relevant state departments, and the welder certificates shall be within the validity period.
Before welding, check whether the pipeline materials and welding materials meet the requirements of design documents, and whether the welding method and position meet the welding conditions on site; According to the provisions of the standard, according to the characteristics of welding materials, the welding process evaluation is carried out, and the welding process instruction is formulated accordingly; Welding work must be carried out in accordance with the provisions of the welding process instruction.
Extended data
Welding standard specification
1. During welding and cutting operations, all inflammable and explosive articles within the working environment 10m shall be cleaned, and attention shall be paid to whether there are flammable liquids and flammable gases in the trenches and sewers of the working environment, and whether there are flammable and explosive substances that may leak into the trenches and sewers, so as to avoid disasters and accidents caused by welding slag and metal sparks.
2. When welding and cutting at high altitude, it is forbidden to throw covered electrode's head, and the lower part of welding and cutting operations should be isolated. After the operation is completed, you should carefully check and confirm that there is no fire hazard before leaving the site.
3. Gas cylinders that meet the requirements of relevant national standards and regulations should be used, and the storage, transportation and use of gas cylinders should strictly abide by the safety operation procedures.
4. Pipelines conveying combustible gas and combustion-supporting gas shall be installed, used and managed according to regulations, and operators and inspectors shall receive special safety technical training.
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