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

Method of straightening straight seam steel pipe:1. The straight seam steel pipe bends in the same direction as the weldReason: Insufficient normalizing of the weld seam, thermal stress exists on the side of the pipe close to the weld seam, so it will bend in one direction after cooling.Solution: 1.

Seamless steel pipes are widely used.1. General-purpose seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel, or alloy structural steel, and have the largest output. They are mainly used as pipelines or structural parts for conveying fluids.2. According t

What is the defect in outer surface of the hot expanded seamless pipe?