ANSI B16.49 3D Long Radius 90 Degree,Size:22inch, Wall Thickness: SCH STD, Material :ASTM A234 WPB carbon steel,3D Bend Radius (R=3D), conforming to ANSI B16.49 Extra Long Radius Lowers Flow Resistance, Widely Used in Gas, Heating, Power and Petrochemical large bore piping systems