Spiral steel pipe knowledge: Spiral steel pipe is a common standard

Spiral steel pipe knowledge: Spiral steel pipe is commonly used standard Spiral steel pipe is commonly used standards are generally divided: SY/T5037-2000 (parts. Also known as ordinary fluid transmission pipeline with spiral seam submerged arc welded steel pipe). GB/T9711.1-1997 ( The national standard. Also called the oil and gas industry transmission steel pipe delivery technical conditions. Part I: A-level steel pipe (to date the current strict requirements of GB/T9711.2 B grade steel)). API-5L (American Petroleum Association. Also called line pipe. It is divided into two grades: PSL1 and PSL2). SY/T5040-92 (spiral submerged arc welded steel pipe for piles). It is a coiled steel strip as raw material, and is often warm extruded to automatically double-wire double-sided submerged arc. The spiral welded steel pipe welded by the welding process is generally higher in strength than the straight seam welded pipe, and the narrower blank can be used to produce a larger diameter pipe, and the same width blank can be used to produce welded pipes of different diameters, but with the same length. Compared with the straight seam pipe, the weld length increases by 30~100%, and the production speed is low.