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 
 Spiral pipe Spiral welded pipe: carbon structural steel is a low-carbon low-alloy structural steel or steel spiral by a certain angle (called the forming angle) rolled into a tube, and then seam welded pipe is made, it can a narrow strip with a large diameter pipe production. Spiral welded pipe is mainly used for oil and gas pipelines, its specifications with diameter * thickness, said. There are single-sided spiral pipe welding and double-sided welding, the pipe should ensure that the pressure test, the tensile strength and cold weld performance to meet the requirements. Faith is life. Customer satisfaction is our eternal pursuit. Our commitment: the same quality, lowest price, homegrown, credit guarantee sincerely look forward to cooperation with all friends. 
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