Spiral pipe are mainly divided into three categories: below
1, the confined liquid transportation with spiral arc-welded steel submerged arc welding, mainly used to transport oil and gas pipelines,
2, the confined liquid transportation with spiral arc-welded steel hf welded by high-frequency welding method of overlapped welding, used for pressure liquid transportation of spiral arc-welded steel high frequency welding. Steel pipe bearingpressure ability is strong, plastic is good, facilitate welding and processing &forming,
3, generally low voltage liquid transportation with spiral arc-welded steel submerged arc welding, with double-face automatic submerged arc welding or a one-sided welding legal system for water, gas, air and steam etc generally low voltage liquid transportation use submerged arc welding tube.
Now the spiral pipe are generally classified into: common standard SY/T5037-2000 (targets, also called ordinary fluid pipelines with spiral arc-welded submerged arc welding steel tube), GB/T9711.1-1997 (GB, also called the oil and gas industry conveying pipe delivery technical conditions first part: A grade steel tube (until now demanding have GB/T9711.2 grade B steel tube)), API - 5L (American petroleum institute, also called pipeline steel tube; divide into PSL1 and PSL2 two levels), SY/T5040-92 (piles with spiral arc-welded submerged arc welding steel tube)
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