The welded steel pipe is widely used

　　The welded steel pipe is widely used, the producing area is mostly Hebei, the strength of the spiral welded steel pipe is generally higher than that of the longitudinal welded steel pipe, and the welded steel pipe with larger diameter can be produced with a narrow billet, and the welded steel pipe with different diameter can also be produced by the same width billet. However, compared with the same length of the straight seam tube, the weld length increases by 40~100%, and the production speed is low. After cutting into a single steel pipe, the first inspection track system shall be made strictly for the three parts of each batch of steel pipe head, and check the mechanical properties, chemical composition, dissolution status, surface quality of the steel pipe and non-destructive inspection and repair to ensure that the pipe making process is qualified, and then it can be formally put into production. The production process of En 10219 ASTM A500 ERW Welded Steel Pipe is simple, production efficiency is high, the cost is low, and the development is fast.

　　The stack height of spiral welded steel pipe pad according to the detailed case, if the warehouse to the sun of the cement ground, cushion height can be 0.1M; if the mud, to pad 0.2 to 0.5m. If stored in the open air, the cement ground cushion should be about 0.3 to 0.5m, and the ground cushion should be 0.5 to 0.7m.