CTS Copper Flange Adapter 300lb Sizes 1-1/2″ thru 8″ Flanges shall be drilled to ANSI B 16.5. 300 Standard powder coated with a EPDM. Insulator adhered to the plate steel flange. Protruding inside of the steel flange to prevent contact with the Copper. Companion Flange Adapter. The Copper component of the flange adapter shall be manufactured to ASME B16.22 – 1995. copper_flange_300lbDownload Share this:TwitterFacebookLike this:Like Loading...