Basic standard:

API 6D, BS5351,ASME B16.34, API 608, MSS SP-72

Flange connection dimesion:

ASME B16.5, DIN2501

Butt welding connection dimension:

ASME B16.25

Face-to-face dimension:

ASME B16.10, API 6D, EN558

Pressure-Temperature rating:

ASME B16.34

Bonnet extension

BS6364

Test:

API 6D, API 598, BS 6755, API 607/6FA, BS6364

Size:  

1/2" ~ 12"

Rating: 

ANSI 150lb-600lbs

Body Materials:

Stainless steel (A351 CF8M, CF8, CF3M, CF3), A352 LCB, LC3 etc.

Trim:  

F304, F316 etc.

Operation:   

Wrench/Lever, Gear, Pneumatic operator