TECHNICAL INFORMATION

DIMENSION TOLERANCE CHART For Flanges

Dimension	Flange	Tolerance
A	Outside Diameter	When O.D. is 24" or less: ±1/16" (1.6mm) When O.D. is over 24": ±1/8" (3.2mm)
D	Inside Diameter	10" and smaller: ±1/32" (0.8mm) 12" thru 18": +1/8" (3.2mm) 20" and larger: -1/16" (1.6mm)
B	Diameter of contact face	1/16" raised face: ±1/32" (0.8mm) 1/4" Raised Face, Tongue & Groove (male & female): ±1/64" (0.4mm)
J	Diameter of hub at base	When hub base is 24" or smaller: ±1/16" (1.6mm) When hub base is over 24": ±1/8" (3.2mm)
H	Diameter of hub at point of welding	5" and smaller: +3/32" (2.4mm), -1/32" (0.8mm) 6" and larger: +5/32" (4.0mm), -1/32 (0.8mm)
P	Drilling	Bolt circle: ±1/16" (1.6mm) Bolt hole spacing: ±1/32" (0.8mm)
	Eccentricity of bolt circle with respect to facing	2 1/2" and smaller ±1/32" (0.8mm) max. 3" and larger ±1/16" (1.6mm) max.
C	Thickness	18" and smaller: ±1/8" (3.2mm), -0" 20" and larger: ±3/16" (4.8mm), -0"
K	Length of hub	10" and smaller: ±1/16" (1.6mm) 12" and larger: ±1/8" (3.2mm)

Dimension	Flange	Tolerance
A	Outside Diameter	When O.D. is 24" or less: ±1/16" (1.6mm) When O.D. is over 24": ±1/8" (3.2mm)
D	Inside Diameter	Threaded: within limits of boring gauge Lap Joint, Slip-on, Socket 10" and smaller: ±1/32" (0.8mm), 0" 12" and larger: -1/16" (1.6mm), 0"
B	Diameter of contact face	1/16" raised face: ±1/32" (0.8mm) 1/4" Raised Face, Tongue & Groove (male & female): ±1/64" (0.4mm)
E, F, S	Diameter of bore	Threaded (S): within limits of boring gauge Lap Joint (F), Slip-on (E), Socket (E) 10" and smaller: ±1/32" (0.8mm), 0" 12" and larger: -1/16" (1.6mm), 0"
P	Drilling	Bolt circle: ±1/16" (1.6mm) Bolt hole spacing: ±1/32" (0.8mm) Eccentricity of bolt circle with respect to facing 2 1/2" and smaller ±1/32" (0.8mm) max. 3" and larger ±1/16" (1.6mm) max.
C	Thickness	18" and smaller: ±1/8" (3.2mm), -0" 20" and larger: ±3/16" (4.8mm), -0"
L, M	Length of hub	18" and smaller: ±1/8" (3.2mm), ±1/32" (0.8mm) 20" and larger: ±3/16" (4.8mm), ±1/16" (1.6mm)