... 3.Standard : ASME, GB, DIN, JIS 4.Material : A105... Steel Flange Type Weld Neck,Slip-On,Blind,Socket Weld,Lap Joint ... ,Orifice Flange,Swivel Flange,Spectacle Blind,Etc. Size 1/2''-72''Class 150#,300#,400#,600#,900#,1500#,2500#,3000# Specification Carbon Steel ...