Large diameter spiral pipe pressure fluid transport spiral submerged arc welded pipe (SY5036-83) is mainly used for transporting oil, natural gas pipelines; pressure fluid transmission high-frequency welded spiral seam steel pipe (SY5038-83), using high-frequency welding lap welding method for fluid pressure high-frequency welded spiral seam steel pipe. Steel pressure capability, good plasticity, easy welding and machining molding; generally low pressure liquid delivery spiral submerged arc welded pipe (SY5037-83), using double-sided automatic submerged arc welding or for the legal system into the water, gas, air and steam is generally low pressure liquid delivery such as submerged arc welding steel pipes. Spiral is now commonly used standard is generally divided into: SY/T5037-2000 (department standard, also known as general fluid pipes with spiral submerged arc welded pipe), GB/T9711.1-1997 (GB, also known as transport oil and gas industry Technical delivery conditions for steel pipe Part: A grade steel (to currently demanding a GB/T9711.2 B grade steel)), API-5L (American Petroleum Institute, also known as line pipe; PSL1 and PSL2 which is divided into two level), SY/T5040-92 (spiral submerged arc welded steel pipe pile with) coil material: Q235A, Q23b, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. Q345 L245 L290 X42 X46 X70 X80 X95 Features: Longitudinal production process is simple, high efficiency, low cost, rapid development. Spiral Welded Pipe Longitudinal intensity is generally higher than that, can narrow the billet production of large diameter pipe, you can also use the same width of the billet production of different pipe diameters. However, with the same length of straight pipe seam, compared weld length of 30 to 100%, and lower production rate. Therefore, most of the use of smaller diameter straight seam welding pipe, large diameter spiral welded pipe are mostly used. Large diameter spiral pipe - Pipe Co., Ltd. Hebei Enzan professional production Tianhui diameter 159mm-2420mm wall thickness 4mm-25mm between the various grades of steel spiral pipe, http://www.naimoguanjian.com tubing http://www . thgangguan.com Spiral Pipe