2011 Steel Pipe Classification Encyclopedia:
1, according to the production method classification (1) seamless steel pipe - hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe, pipe jacking (2) welded pipe (a) by process - arc welded pipe, resistance welded pipe ( High Frequency, Low Frequency), Welded Pipe, Furnace Welded Pipe (b) Welded Joints - Straight Welded Pipes, Spiral Welded Pipes
2. Classification according to 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, semi-circular steel ball, other (2) complex Section steel pipe--equilateral hexagonal steel pipe, five-floating plum-shaped steel pipe, double convex steel pipe, double concave steel pipe, melon-shaped steel pipe, conical steel pipe, corrugated steel pipe, steel case, other
3, classified by wall thickness - thin-walled steel pipe, thick-walled steel pipe
4. According to the use classification - Pipes for pipes, steel tubes for thermal equipment, steel pipes for machinery industry, steel pipes for petroleum, geological drilling, steel pipes for containers, steel pipes for chemical industry, special-purpose steel pipes, and others
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