Standard: GB JIS ASTM AISI DIN ect Product name Alloy steel pipe/tubeStandard GB JIS ASTM AISI DIN MaterialASTM SA210 C SA213 T11 T91 T22 A335 P9 P11 P91, 12CrMo1V,15CrMo, 16Mn TP304,316. ectThickness1-100mmScheduleSCH5S,SCH10S,SCH10,SCH20,SCH30,SCH40S,SCH40,STD,SCH80,SCHXS,SCH160,SCHXXS,ectOuter diameter6-820 mmLength5.8m 6m 12m or as customer demandUsed areaPetroleum,chemical,power, gas, water, ...