1, According to the production method of cs steel pipe classification
(1) seamless steel pipe is including the hot-rolled pipes, cold-rolled, cold drawn tubes, extruded tube
(2) welded steel pipe
(A) according to process, there are arc welded pipe, ERW pipe (high-frequency, low frequency), gas pipe, stove pipe
(B) by weld points, there are longitudinally welded pipes and spiral welded pipe
2, According to the cross-sectional shape classification
(1) simple section steel, there are round pipe, square pipe, oval pipe, steel triangular, hexagonal steel, diamond steel, octagonal steel, steel semi-circle, the other.
(2) complex section steel, there are equilateral hexagonal steel pipe, five plum-shaped steel pipe, steel pipe double convex, double concave steel, oval-shaped steel conical pipe, corrugated steel pipe, steel pipe case, other.
3, According to wall thickness, there are thin-walled steel pipe, thick-walled steel pipe
4. By Application, there are steel pipes, thermal equipment with steel pipes, industrial machinery drilling steel, petroleum, geological steel pipe, steel container, chemical industry with steel pipes, steel pipes for special purposes, other.
