DIMENSIONAL TOLERANCES
ORIFICE FLANGES
ASME B16.36
Tolerances for B16.36 orifice flanges are the same as those for B16.5 with the following exceptions:
| Center of Pressure Tap to
Flange Face |
NPS 3 and smaller
NPS 4 and larger |
±0.02″
±0.03″ |
±0.5 mm
±0.8 mm |
Bore Diameter – Welding Neck Flanges Only – ±0.5% of nominal bore size.
WELDING NECK ORIFICE FLANGES B16.36 Class 300
WELDING NECK ORIFICE FLANGES B16.36 Class 400
WELDING NECK ORIFICE FLANGES B16.36 Class 600
WELDING NECK ORIFICE FLANGES B16.36 Class 900
WELDING NECK ORIFICE FLANGES B16.36 Class 1500
WELDING NECK ORIFICE FLANGES B16.36 Class 2500
THREADED ORIFICE FLANGES Class 300