Now the common standards for
spiral steel tubes are generally divided into: SY/T5037-2000 (partial standard, also called spiral seam submerged arc welded steel pipe for ordinary fluid conveying pipeline), GB/T9711.1-1997 (national standard, also called oil and gas industry transportation) Technical requirements for steel pipe delivery Part I: Class A steel pipe (to the current strict requirements GB/T9711.2 Class B steel pipe)), API-5L (American Petroleum Institute, also called pipeline steel pipe; which is divided into PSL1 and PSL2 Level), SY/T5040-92 (spiral submerged arc welded steel pipe for pile) Spiral tube material: Q235A, Q235B, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, Q345, L245, L290, X42, X46, X70, X80, X95
