1, according to CS steel production methods for classification.
(1) seamless steel pipe, including hot-rolled tubes, cold-rolled tubes, cold drawn tubes, extruded tubes.
(2) welded steel pipe
(A) According to the process, there are electric arc welded pipe, electric resistance welded pipe (high frequency, low frequency), gas pipe,
(B) Welded joints are longitudinally welded and spiral welded.
2, according to the cross-sectional shape classification.
(1) Simple section steel, with round pipe, square pipe, oval pipe, steel triangle, hexagonal steel, rhombic steel, octagonal steel, steel semicircle, the other.
(2) The cross-section steel, equilateral hexagonal steel pipe, five plum-shaped steel pipe, steel double convex, double concave steel, oval steel cone pipe, corrugated pipe, steel pipe box.
3, according to the wall thickness, thin-walled steel pipe, thick-walled steel pipe.
4. The application of a steel pipe, thermal equipment, steel pipe, industrial machinery drilling steel, petroleum, geological steel pipe, steel containers, chemical pipe, special-purpose steel pipe.