A brief introduction about seamless steel pipe’s technique

    Seamless steel pipe is a round hollow section steel pipe, which are widely used for transmission such as petroleum, natural gas, water and other fluid transmission. Also are widely used in construction and as high-pressure steel pipes.

    Most common seen technique for seamless steel pipe are hot roll and cold draw. Cold drawn seamless steel pipe’s manufacturing process are much more complicated than hot-rolled seamless steel pipe. Visually speaking, cold drawn seamless steel pipe will be shorter than hot rolled seamless steel pipe. Cold drawn pipe will be thinner, and appearance will be better than hot rolled. Starting form billet, finish as formed seamless steel pipe, after  all kinds of inspection, such as chemical composition analysis, metallographic analysis, tensile test, low temperature impact test, etc.

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    http://www.xysteelpipe.com/info/A-brief-introduction-about-seamless-steel-pipe%E2%80%99s-technique-491-1.htm

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