1. Classification by production method
(1) Seamless pipe – hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe, pipe jacking
(2) Welded pipe
(3) According to the process – arc welded pipe, electric resistance welded pipe (high frequency, low frequency), gas welded pipe, furnace welded pipe
(4) According to the welding seam – straight seam welded pipe, spiral welded pipe
2. Classified by section shape
(1) Simple section steel pipes – round steel pipes, square steel pipes, oval steel pipes, triangular steel pipes, hexagonal steel pipes, diamond steel pipes, octagonal steel pipes, semi-circular steel pipes, others
(2) Steel pipes with complex sections – unequal hexagonal steel pipes, five-petal plum-shaped steel pipes, double-convex steel pipes, double-concave steel pipes, melon-shaped steel pipes, conical steel pipes, corrugated steel pipes, case steel pipes, and others
3. Classification by wall thickness – thin-walled steel pipe, thick-walled steel pipe
4. Classification by use – steel pipes for pipelines, steel pipes for thermal equipment, steel pipes for machinery industry, steel pipes for petroleum, geological drilling, container steel pipes, steel pipes for chemical industry, special-purpose steel pipes, others
Post time: May-18-2022