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　　Seamless Pipes is widely used. Seamless Pipes for general use are rolled by ordinary carbon structural steel, low alloy structural steel or alloy structural steel, with the largest output.

　　They are mainly used as pipes or structural parts for conveying fluid. According to different uses, they are supplied in three categories: according to chemical composition and mechanical properties; Supply as per hydrostatic test.

　　If the steel pipe supplied according to class A and class B is used to receive liquid pressure, the hydrostatic test shall also be suspended. seamless pipes for special purposes include boiler seamless pipes, chemical power seamless pipes, geological seamless pipes and petroleum seamless pipes. seamless pipes has a hollow section, many of which are used to carry fluid.

　　Such as the pipeline for transporting oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe is a kind of economic cross-section steel because of its lighter weight in bending and torsion strength. It is widely used to make structural and mechanical parts, such as petroleum drill pipe.

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