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Pipe and applicability
Jun 12, 2018

The pipe material used in oil pipeline is mainly carbon steel pipe, which can be divided into seamless steel pipe and welded steel pipe according to its manufacturing process. Seamless steel pipe has high strength and many specifications, so it is suitable for corrosive oil products or high temperature transport. Seamless steel pipe can be divided into hot rolling and cold drawing. Because cold drawing will cause the material to harden, the heat treatment should be done according to the specific purpose of the pipe. Welded steel pipe can be divided into two types: butt seam steel pipe and downcast welding pipe. Due to process characteristics of the carbon steel pipe more easily when this kind of steel pipe in the low temperature brittle, is mainly so interesting pipeline, pipe temperature also shoulds not be more than 300 degrees Celsius, generally plain carbon steel tube temperature between 0 to 300 degrees Celsius. If high quality carbon steel pipe is used, the temperature range of application and relaxation up to 40 to 450 degrees Celsius. The experimental pressure of steel tube is 1.5 times of the nominal pressure. When the temperature of the delivered material does not exceed 200 degrees Celsius, the working pressure is called nominal pressure. When the temperature exceeds 200 degrees, the working pressure should be lower than the nominal pressure.

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