SSAW Pipe

　　If your customer has affection on large diameter steel pipe, no matter ERW steel pipe or LSAW type, you would figure out the advantages for it. Thus, you will finally figure out the special treatment for large diameter steel pipe. 　　In order to achieve the standards like API, we know that large diameter pipe would have strict production process. Thus, it can serve on the engineering project like bridge piling, underwater piling, piling high-rise buildings. 　　With its good adhesion, corrosion resistance, and other traits, we will make large diameter steel tube improve traffic and transportation efficiency, reduce delivery pressure loss. 　　Coating solvent-free is another character, no leaking substances, and thus will not contaminate the transmission medium, thus ensuring fluid purity and hygiene at -40 ℃ to +80 ℃ range can be used alternately hot and cold cycles, aging, no cracks, which can in cold areas such harsh environments.

    High frequency straight seam welded pipe after welding, the heat treatment is a new elimination of residual stress technology. Before welding, the material is preheated to the post-heat treatment temperature and the weld is continuously heated during the welding process to maintain this temperature. After the welding is completed, it is warmed by the heat-insulating cotton to cool it slowly. This method can effectively reduce the welding residual stress, improve the metal resistance to stress corrosion.     Non-destructive testing of the weld due to the pipeline in the water supply project is a large steel pipe, especially the thickness of t = 30mm steel pipe is used as a pipe bridge, it is necessary to bear the water pressure, but also bear the weight of the steel pipe and water bending moment, so the quality of the welding requirements are particularly high. For the pipe with t = 30mm thick large diameter steel pipe, the longitudinal seam and ring joints are ...