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Spiral steel pipe---product knowledge

Views: 0     Author: Site Editor     Publish Time: 2021-04-19      Origin: Site

Spiral steel pipe is a spiral welded steel pipe made of strip steel or coiled plate as raw material, often extruded and formed by automatic double-wire double-sided submerged arc welding. Spiral steel pipe and its standard classification: spiral seam submerged arc welded steel pipe for pressure fluid transportation (GB/T9711.1-2011) is mainly used for pipelines for transporting oil and natural gas; spiral seam welded steel pipe for pressure fluid transportation (SY5037-2012) ), spiral seam welded steel pipe used for pressurized fluid conveying low pressure medium.API5L X42 Spiral Steel tube Used in gas Line - GKSTEELPIPE

Spiral steel pipe and its standard classification: Spiral seam submerged arc welded steel pipe for pressure fluid transportation (SY5037-2012) is mainly used for water transportation, steel structure, bridge support; spiral seam welded steel pipe for pressure fluid transportation (GB/T9711.1 -2011), mainly used to transport oil, natural gas and other media.

The characteristics of spiral steel pipe: The spiral steel pipe has simple production process, 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 also be used to produce welded pipes with different pipe diameters. 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 also be used to produce welded pipes with different pipe diameters. But 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 use straight seam welding, and the large diameter welded pipes mostly use spiral welding.

At present, the commonly used standards for spiral steel pipes are generally divided into: SY/T5037-2000 (Ministry standard, also called spiral seam submerged arc welded steel pipe for ordinary fluid transportation pipelines), GB/T9711.1-1997 (National standard, also called oil and gas industrial transportation The technical delivery conditions of steel pipes: Grade A steel pipes (the most stringent ones are GB/T9711.2 Grade B steel pipes), API-5L (American Petroleum Institute, also called pipeline steel pipes; which are divided into two grades: PSL1 and PSL2) , SY/T5040-92 (Spiral submerged arc welded steel pipe for pile)

The spiral 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. Submerged arc welded steel pipes for general low-pressure fluid transportation such as gas, air and steam.


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