Design: API 6D;ANSI B16.34;GB/T12237
Face to face: API 6D;ANSI B16.10; GB/T12221
Flange connection dimension: ANSI B16.5; ANSI B16.47;JB79;GB9113; etc.
BW end dimension: ANSI B16.25;GB/T12224
Inspection & test: API 6D;API598;JB9092
Driving mode: Manual, gear, pneumatic, electric etc.