1) Standard compliance: a) Design and manufacture: API 6D, API 608, ANSI B16, or BS 5351 b) Face to face dimensions: ANSI B16 c) End flange dimensions: ANSI B16 d) Test: API 6D or API 598 2) Type of connection: a) RF and RTJ flange ends to ANSI B16 standard b) BW flange ends to ANSI B16 standard 3) Type of operation: a) Connection dimension of worm gear actuator, electric actuator, pneumatic actuator to ISO 5211 standard b) Anti-static construction "AS" and fire-resistant construction "FD"