What is the production process of welded steel pipe?

The production process of welded steel pipe can be divided to LSAW- Longitudinal Submerged Arc Welded, SSAW Spiral Submerged Arc Welded and Straight seam Electric-Resistance Arc Welding.

The process of welded steel pipe.

Raw material testing, milling, pre-bending, forming, pre-welding, internal welding, external welding, ultrasonic inspection, diameter expansion, water pressure test, chamfering, ultrasonic inspection, X-ray inspection, magnetic particle inspection at the end of the tube, and finished products