The standard classification and application of seamless steel pipe

　　Today, Great steel pipe is introduce the standard classification and application of seamless steel pipe.

　　1.Structural seamless steel tubes(GB/T8162-2008), it’s a seamless pipe used for general structure and mechanical structure.

　　2.Fluid convey seamless steel tube(GB/T8163-2008), it’s a general seamless pipe used for conveying the water, oil, gas and other low pressure fluids.

　　3.Low and medium pressure boiler seamless pipe(GB3087-2008), it’s used for make all kinds of structural seamless steel pipe, such as low and medium pressure boiler overheated steam pipe, boiled water pipe, overheated steam pipe used for locomotive boiler, big boiler smoke pipe, small boiler smoke pipe, high-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless pipe used for arch brick pipe.

　　4.High pressure boiler seamless pipe(GB5310-2008), it’s used for make high-quality carbon steel, alloy steel, and stainless heat-resistant steel seamless pipe that used for high pressure water pipe boiler heating surface.

　　5.High pressure seamless steel pipe used for fertilizer equipment(GB6479-2000), it’s apply to the operating temperature is -40~400℃, and the operating pressure is 10~30Ma pipeline, such as fertilizer equipment, high-quality carbon structural steel pipeline and alloy steel pipe.

　　6.Petroleum cracking tube(GB9948-2006), it’s apply to oil refinery furnace tube, heat ex-changer and seamless pipeline.

　　7.Geological drilling steel pipe(YB235-70), this kind of steel pipe is apply to the geological department to drilling the core, we can divide to drill pipe, drill collar, core pipe, casing and sedimentary tube by application.

　　8.Diamond core drilling steel pipe(GB3423-82), it’s apply to the Diamond core drilling, it has included drill pipe, core pipe, casing and seamless pipe.

　　9.Petroleum drilling pipe(YB528-65), it’s used for the seamless pipe with thickening in the inside or outside at both ends of oil drilling.

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