Divided into general welded pipe, galvanized welded pipe, oxygen welded pipe, wire bushing, metric welded pipe, idler pipe, deep well pump pipe, automotive pipe, transformer pipe, welded thin-walled pipe, welded special-shaped pipe, scaffold pipe and spiral welded pipe .
General welded pipe: The general welded pipe is used to deliver low pressure fluid. Made of Q195A, Q215A, Q235A steel. It can also be made of other mild steels that are easy to weld. The steel pipe should be subjected to hydraulic pressure, bending, flattening and other tests. It has certain requirements on the surface quality, usually the delivery length is 4-10m, and often requires length (or multiple feet) delivery. The specification of the welded pipe is expressed by the nominal diameter (mm or inch). The nominal diameter is different from the actual one. The welded pipe has two kinds of ordinary steel pipe and thick steel pipe according to the specified wall thickness. The steel pipe is subdivided with thread and without thread according to the pipe end form.
Galvanized steel pipe: In order to improve the corrosion resistance of the steel pipe, the general steel pipe (black pipe) is galvanized. Galvanized steel is divided into hot dip galvanized steel and electric steel zinc. The hot dip galvanized galvanized layer is thick and the cost of electrogalvanizing is low.