Quality inspection process of straight seam welded pipe

Posted by chase Liu on March 16th, 2023

Longitudinal welded pipe (ERW pipe or LSAW pipe) refers to a welded steel tube obtained by straight seam welding of hot-rolled or cold-rolled steel plates or steel strip coils welded on welding equipment. The straight seam steel pipe gets its name because the welding of the steel pipe is in a straight line. Longitudinal welded pipe manufacturers follow strict production processes during production, but it is difficult to say that 100% of the products produced are qualified and excellent, so this requires quality inspection of straight seam welded pipe manufacturers. What are the quality inspection processes for straight seam welded pipes?

1. Oil marking of straight seam welded pipes. After passing the inspection, the manufacturers of straight seam welded pipes need to apply a layer of oil on the surface, which can play a role in anti-corrosion. In the process of oiling, it is best to mark according to the user's requirements.

2. Straightening and milling of straight seam welded pipe: it is necessary to use an anvil machine to make the original curled steel plate flat. After that, the two edges of the steel plate are milled on both sides by the edge milling machine, so that it can achieve the required plate width, plate edge parallelism and groove shape.

3. Visual inspection of longitudinal seam welded pipe requires professional technicians to inspect it to ensure quality problems.

4. Ultrasonic flaw detection of straight seam welded pipe, which is a comprehensive inspection that needs to check the inner and outer welds of the straight seam welded pipe manufacturer and the base metal on both sides of the weld.

5. X-ray flaw detection of straight seam welded pipes, X-ray industrial TV inspection of the inner and outer welds of straight seam welded pipe manufacturers.