... these flanges in different dimensional and material specifications based upon the requirements of the clients.Stainless Steel : ASTM A 182, ... 317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750 Carbon Steel : ASTM A 105, ASTM A ... , DIN2637, DIN2638, DIN2673B.S : BS4504 , BS4504, BS1560, BS10 Stainless Steel Blind Flange,Slip on Flange,ANSI B16.5