... Flanges are drilled (machined) with the wall thickness of the flange having the same dimensions of the matching pipe. The lighter ... : ASTM A 182, A 240Grade : F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L, Duplex ... , DIN2637, DIN2638, DIN2673B.S : BS4504 , BS4504, BS1560, BS10 Stainless Steel Blind Flange,Slip on Flange,ANSI B16.5