... , Tee, Reducer, Crosses, End cap,MATERIALCarbon Steel Butt Welding Pipe fitting:ASTM A234 WPB,WPC, A105; A420 WPL6,WPL9,WPL3, WPL8 ... ,52,56,60,65,70 Alloy Steel Butt Welding Pipe fitting:ASTM A234 WP1, WP12, WP11, WP22, WP5, WP7, WP8, and ... WP91 Stainless Steel Butt Welding Pipe fitting:ASME A403 WP304,304L,316,316L, 319, 310S, 321, 321H ...