ERW (Electric Resistance Welded) steel pipes are made from steel coils or steel plates and the weld seam runs parallel to the pipe. They are commonly applied to transport oil, natural gas and other vapor-liquid objects, and can meet various requirements of high and low pressure. This article will introduce in detail the quality evaluation process of ERW steel pipes. Read on to learn more.

When welded steel pipe is manufactured, a steel plate or strip is bent and subsequently welded into either a circular, traditional pipe shape or a square shape, resulting in a seam on its body. Today, we will introduce in detail GB standards for welded steel pipes.