According to the form of weld, it is divided into straight seam welded pipe and spiral welded pipe.
According to the use, it is divided into general welded pipe, heat exchanger tube, condenser tube, galvanized welded pipe, oxygen blow welded pipe, wire casing, metric welded pipe, idler pipe, deep well pump pipe, automobile pipe, transformer pipe, electric welded thin-walled pipe, electric welded special-shaped pipe and spiral welded pipe
