The defects that are prone to occur in the welded area of the spiral steel pipe include pores, hot cracks, and undercuts. The porosity of the welded seam of the spiral steel pipe not only affects the tightness of the welding seam of the pipeline and causes the leakage of the pipeline, but also becom

There are three methods of large diameter steel pipe forming. These methods are widely used in industrial steel pipe manufacturing. Different methods will have different applications.1. Thermal expansion method. The diameter expansion equipment is simple, low-cost, easy to maintain, economical and d

Straight seam welded pipe is a welding process of steel pipe opposite to spiral steel pipe. Because the welding process of this kind of steel pipe is relatively simple, and the welding cost is relatively low, it can achieve high efficiency during production, so it is relatively common in the market.

How much do you know about the weld gap of thin-walled spiral steel pipe?1. If the gap is too large, the proximity effect will be reduced, the eddy current will be insufficient, and the weld will not be fused or cracked due to poor intercrystalline joints.2. If the gap is too small, the proximity ef