FLANGE DIMENSION TOLERANCES, ASME B16.5 (IN)
WELD NECK FLANGE DIMENSION TOLERANCES, ASME B16.5 (IN)
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)
|
BLIND, LAP JOINT, SLIP-ON, SOCKET, THREADED FLANGE DIMENSION TOLERANCES, ASME B16.5 (IN)
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)
|