... Blind flange Material :ASTM A105/A350/A694 Standard;ANSI B16.48 Size: 1/2" TO 60" Class:150,300,400,600 ... ,900,1500, ANSI B16.48 Carbon steel Spectacle Blind flange Flange Type:Butt Welding Flange ... ,LOIYD,TUV,and other party allowed by clients. ANSI B16.48 Carbon steel Spectacle Blind flange