Alloy Steel Pipe: OUTSIDE DIAMETER: 406MM - 864MM (16 INCH to 34 INCH) WALL THICKNESS: 18MM - 100MM Standard: ASTM / ASME A / SA335 P11, P12, P22, P91, P92 EN10216-2 13CrMo4-5, 10CrMo9-10, X10CrMoVNb9-1, 15NiCuMoNb5-6-4 (WB36) ASTM A519 SAE 4130 / 4140. Usage: Boiler, electricity, mechanical, gas cylinder, chemical, offshore and oil service.