Flange raised face, butt weld, RTJ, RF / Seat rings: threaded (renewable), welded / Operation: Handwheel, gear, electric, pneumatic, hydraulic, …
Design ANSI B16.34 and BS1873
Test API 598
Face-to-face dimensions ANSI B16.10
End flange dimensions ANSI B16.5
Butt weld ends ANSI B16.25