The ASME SA 234 Gr WPB Pipe Elbow and other fittings can come in different dimensions according to the ASME/ ANSI B16.9 and B16.28 standards.Common use material are ASTM A234 Grade WPB, WPC, WP5, WP9, WP11, WP22 and WP91. It covers the butt-welded pipe fittings of Elbow, Tee, Reducer, Cap and Cross, and some socket welding, threaded pipe fittings.