Classification of Steel Pipes
1. Classification by Production Method
(1) Seamless pipe – hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe, pipe jacking.
(2) Welded pipe.
(a) According to the process – arc welded pipe, resistance welded pipe (high frequency, low frequency), gas welded pipe, furnace welded pipe.
(b) It can be divided into straight welded pipe and spiral welded pipe.
2. Classification by Section Shape
(1) Simple section steel pipe – round steel pipe, square steel pipe, oval steel pipe, triangular steel pipe, hexagonal steel pipe, diamond steel pipe, octagonal steel pipe, semicircular steel pipe and others.
(2) Complex section steel pipe — unequal hexagon steel pipe, five petal plum shaped steel pipe, double convex steel pipe, double concave steel pipe, melon shaped steel pipe, conical steel pipe, corrugated steel pipe, watch case steel pipe and others.
3. Classification by Wall Thickness
It is divided into thin-walled steel pipe and thick walled steel pipe.
4. Classification by Use
Steel pipes for pipeline, thermal equipment, mechanical industry, petroleum, geological drilling, vessel, chemical industry, special purpose and others.
