Size 1/8'' to 24'' Pressure 150LB, 300LB, 600LB, ... flange having the same dimensions of the matching pipe. The lighter the pipe is, the larger the bore, conversely, ... 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750 Carbon Steel : ASTM A 105, ASTM A ... , DIN2638, DIN2673B.S : BS4504 , BS4504, BS1560, BS10 Stainless Steel Lap Joint Flanges (ANSI B16.5)