... Pressure 150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB Connection Butt Weld & Socket Weld & Thread FlangesOur Flanges are drilled (machined) with the wall ... and material specifications based upon the requirements of the clients.Stainless Steel : ASTM A 182, A 240Grade : F 304 ... 321H, 317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750 Carbon Steel : ASTM ...