ANCORP offers ASA/ANSI weld flanges in two designs: fixed and rotatable. Fixed flanges have a set bolt hole orientation whereas rotatable flanges have a two piece design allowing for bolt hole rotation to assist bolt hole alignment when mating the two flanges. In addition, all ASA/ANSI sealing assemblies must include 1 smooth face ASA/ANSI flange and 1 grooved face flange. Standard ASA/ANSI weld flanges are manufactured from 304L stainless steel. ASA/ANSI weld flanges are manufactured with a weld prep (tube counterbore with step) for immediate installation on your system. ASA/ANSI flange sizes range from 4.25" to 16.00". For information concerning a specific size ASA/ANSI fixed flange with a smooth face, click on the appropriate size above.