Practical knowledge introduction pipe

Classification of the pipe

    1, classified according to the production method

    (1) Seamless - hot-rolled pipes, cold-rolled tubes, cold drawn tubes, extruded tube, top tube

    (2) pipe

    (A) according to the process sub - arc welded pipes, electric resistance welded pipe (high-frequency, low frequency), gas pipe, furnace welded pipe

    (B) the weld points - longitudinally welded pipes, spiral welded pipe

    2, according to the cross-sectional shape classification

    (1) a simple cross-section steel - Round steel pipe, square steel pipe, oval steel tubes, triangular steel tube, hexagonal steel, diamond steel octagonal steel, semi-circular steel circle, other

    (2) complex section steel pipe - equilateral hexagonal steel pipe, five plum-shaped steel tube, steel pipe of the double-convex, double concave steel pipe, melon-shaped pipe, conical steel pipe, corrugated steel pipe, case steel pipes, other

    3, according to the wall thickness classification - thin-walled steel pipe, thick wall steel pipe

    4, by purpose - pipes with steel pipes, thermal equipment with steel pipes, mechanical industrial steel pipe, petroleum, geological drilling steel pipes, the container steel pipes, chemical industries steel pipe, special purpose steel pipes, other