ANSI/ASME B16.49-2001 ASME B31 MSSSP-75-1998 ISO 15590-2 Petroleum and natural gas industries - induction bends, fittings and flanges for pipeline transportation systems Part 2: Fittings EN 14870-1,2,3 Petroleum and natural gas industries. Induction bends, fittings and flanges for pipeline transportation systems. Flanges Outside diameter: 25-Æ1620 Bend radius:3-12m(9.84ft-40 ft) Max wall thickness: 120mm(4.7in) Angled90° Mother Pipe: Carbon Steel, Alloy Steel, Stainless Steel, High Chrome Steel, High Nickel High Chrome Steel, Monel Metal, Copper Alloy, Titanium.