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?

The difference between high frequency welded steel pipe and straight-seam welded steel pipeFirst. Different in natureA. High-frequency welded steel pipe: After the hot-rolled coil is formed by the forming machine, the skin effect and proximity effect of the high-frequency current are used to heat an