Types of spiral welded pipes: spiral welded pipes are generally higher in strength than straight-seam welded pipes. Welded pipes with larger diameters can be produced with narrow blanks, and welded pipes with different diameters can be produced with blanks of the same width. But compared with the straight pipe of the same length, the length of the weld is increased by 30-100%, and the production speed is lower. Therefore, most of the smaller-diameter welded pipes use straight seam welding, and the larger-diameter welded pipes mostly use spiral welded pipes.

1. Conveying fluid under pressure, using spiral seam submerged arc welded steel pipe SY5036-83, mainly used for conveying oil and natural gas pipelines; Anticorrosive steel pipe under pressure fluid conveying spiral seam high frequency welded steel pipe SY5038, using high frequency lap welding Welded, spiral seam high-frequency welded steel pipe for pressure fluid delivery. The steel pipe has strong pressure bearing capacity and good plasticity, which is convenient for welding and processing; General low-pressure fluid transportation spiral seam submerged arc welded steel pipe SY5037, which is made of water, gas, air and Submerged arc welded steel pipes for general low pressure fluid transportation such as steam.