In horizontalpositionwelding, the gravity makes molten metal flow downward and sometimes causes weld defects such as undercut and overlap.
横向焊接时由于熔化金属重力的作用,会引起熔池金属下淌,从而产生咬边以及焊瘤等焊接缺陷。
2
The project position of welder qualification test for long transporting pipe depends on vertical down welding basically, which is namely fixed pipe with axis horizontal welding (5gx).