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- The spiral steel pipe is made by rolling low-carbon structural steel or low-alloy structural steel strip into pipe , according to a certain angle of spiral line (called forming angle), and then welding the pipe seams. It can be used for produce large diameter steel pipe with narrow strip steel. T ...阅读更多
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- Spiral submerged arc welded steel pipe sometimes encounters some situations in the production process, such as air holes.当焊接接缝中有空气孔时，它将影响管道质量，使管道泄漏并造成沉重的损失。 When the steel pipe is used, it will a...阅读更多
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