Does Sinopec pipe welder use double shielded welding?

No need. All equipment has welding process requirements, and the penetration and fusion degree of secondary welding is not enough, which is easy to produce blowholes, which affects the flaw detection of oil tank welds and has great safety hazards, so Sinopec pipe welders do not need secondary welding. Double-sided shielded welding (full name carbon dioxide gas shielded welding) process is suitable for welding various large steel structures of low carbon steel and low alloy high strength steel. High welding productivity, good crack resistance, small welding deformation and wide deformation range, which can be used to weld thin and medium plates.