ANSI / ASME B16.36 Class 900 Weld Neck Orifice Flange Dimensions (RF)

ASME B16.36 Class 900 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.