... DIN, Chinese GB/T, BS standard5. Main Material:Carbon Steel & Low Alloy steel. ASTM A53, A106, A210 etc; JIS STPG42, G3454, G3456 ... field, fulcrum bearing etc; The transportation of fluids in the projects and big equipments, for example transport of water, oil, gas ... composition:Please See below. ASTM A210 Low Alloy Seamless Boiler Steel Pipe