What is spiral steel pipe

Spiral steel pipe production process: It is a spiral seam steel pipe welded by automatic double-wire double-sided submerged arc welding with strip steel coils as raw materials, often extruded and formed.
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　　The characteristics of spiral steel pipe: straight seam welded pipe production process is simple, high production efficiency, low cost, and rapid development. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. A narrower blank can be used to produce welded pipes with larger pipe diameters, and a billet with the same width can be used to produce welded pipes with different pipe diameters. However, compared with the straight seam pipe of the same length, the weld length is increased by 30-100%, and the production speed is lower. Therefore, most of the smaller diameter welded pipes adopt straight seam welding, and the large diameter welded pipes mostly adopt spiral welding.

Spiral pipe and its standard classification: spiral seam submerged arc welded steel pipe for pressure fluid transportation (SY5036-83) is mainly used to transport oil and natural gas pipelines; spiral seam high frequency welded steel pipe for pressure fluid transportation (SY5038-83), Spiral seam high-frequency welded steel pipe welded by high-frequency lap welding and used for conveying pressure fluid. The steel pipe has strong pressure-bearing capacity and good plasticity, which is convenient for welding and processing. Generally, the spiral seam submerged arc welded steel pipe (SY5037-83) for low-pressure fluid transportation is made by double-sided automatic submerged arc welding or single-sided welding for water, Submerged arc welded steel pipe for conveying general low pressure fluids such as gas, air and steam

 　Spiral tube material: Q235A, Q23b, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. 　Q345 L245 L290 X42 X46 X70 X80