ANSI / ASME B16.36 Class 1500 Weld Neck Orifice Flange Dimensions (RF)

ASME B16.36 Class 1500 Weld Neck Orifice Flanges

Nominal Pipe Outside Diameter of RF
R
Outside Diameter of Flange
O
Minimum Thickness of Flange
tf
Length Through Hub,
Y
Diameter of Hub
X
Hub Diameter Beginning of Chamber
A
Bore
B
Diameter of Pressure Connection
TT
Diameter of Bolt Circle Number of Holes Diameter of Holes Diameter of Bolts Length of Studs Bolts
Notes:

*For NPS 2 1/2 and smaller, use Class 1500.
**Use 25.4 as a factor to convert Inches to millimeters.