Spiral steel pipe which helix

Spiral steel pipe which spiral it, let us simply talk about the spiral steel pipe related issues it, in fact, such a spiral welded pipe is mainly based on low-carbon carbon steel or some alloy structure in the bar to go Fixed angle of the helix, they can be slowly rolled into the shape of the tube, and then composed of pipe joints, can be used for large diameter steel pipe production. Spiral welded pipe is mainly spiral submerged arc welded pipe. Because it can be widely used construction of various gas pipeline in our China. specifications indicated by the outside diameter × thickness. If spiral pipe welding single-sided and double-sided welding, pipe pressure test should ensure, cold bending and tensile strength properties of the weld . Longitudinal after molding is hot-rolled coil, cylindrical steel coil smooth modification, a current or flux layer effects the skin effect of the welding arc combustion and adjacent high frequency edge of the tube is heated to melt and fusion It has the role of a certain pressure, and finally cooled molded in the edge of the tube is melted by a high frequency current, it is called ERW, because such benefits, so in many places can be very quickly and easily Use, and this is the greatest charm of the spiral steel pipe.

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