ITEM:NPT COUPLING PRESSURE: 2000LB, 3000LB, 6000LB, 9000LB Size: 1/8" -4" Standard: ... 5. GB/T216344)Pressure: 2000LB, 3000LB, 6000LB, 9000LB5)Material: Carbon steel, Stainless steel: (1Cr18Ni9Ti, Cr18Ni9, 0Cr19Ni10, 0Cr17Ni12Mo2Ti, 304, 304L, 316, 316L etc)Carbon ... #, ASTM A105, 16Mn, ASTM A403, ASTM A234), Alloy steel (Cr5Mo, 16MnR, 15CrMo, 12Cr1MoV, 10CrMo910)6)Thickness: Sch40, Sch80, Sch160, ...