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　　The characteristics of spiral welded steel pipe production are as follows:

　　(1) The same width of strip can be used to produce a variety of outer diameter pipes;

　　(2) The welded steel pipe has good straightness and accurate size. The internal and external spiral welds increase the rigidity of the pipe body, so there is no need for sizing and straightening procedures after welding;

　　(3) The 3 Inch Sch40 Welded Steel Pipe is easy to realize mechanization, automation and continuous production;

　　(4) Compared with other equipment of similar scale, it has smaller overall dimension, less land occupation and investment, and faster construction;

　　(5) Compared with the straight welded steel pipe of the same size, the weld on the unit length of the pipe is longer, so the productivity is lower.

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