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What welding certificate is needed for gas pipeline welding?
Quality supervision bureau welding and hot cutting operation certificate and welding special certificate.
1, welding personnel shall participate in the training of pressure pipeline welders, and they may take up their posts with certificates after passing the examination.
2. Pipeline welding methods include manual argon arc welding, covered electrode arc welding and flux-cored gas shielded welding. , should be selected according to the pipe diameter.
3. Different welding methods have different requirements for welders. At present, the vertical welding method is widely used. Manual covered electrode welding is used when the pipe diameter is small, and semi-automatic welding method is used when the pipe diameter is large.
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