STAINLESS STEEL FLANGE
DIMENSIONAL TOLERANCES

 

Threaded, Slip-On, Lap Joint and Blind Flanges
Outside Diameter* When OD is 24” or less ±1/16”
When OD is over 24” ± 1/8”
Inside Diameter Threaded Within
limits on boring gauge
Slip-On and Lap Joint 10” and smaller + 1/32”, -0”
12” and larger +1/16”, -0”
Diameter of Counterbore 10” and smaller +1/32”, -0”
12” and larger +1/16”, -0”
Diameter of Contact Face 1/16” Raised Face ±1/32”
1/4” Raised Face Tongue and Groove or Male and Female ±1/64”
Outside Diameter of Hub* 12” and smaller +3/32”, -1/16”
14” and larger ±1/8”
Drilling* Bolt
Circle
±1/16”
Bolt hole spacing ±1/32”
Eccentricity of Bolt Circle and Facing (with respect to
bore)
1/32” max
Length Thru Hub 18” and smaller +1/8”, -1/32”
20” and larger +3/16”, -1/16”
Thickness 18” and
smaller
+1/8”, -0”
20” and larger +3/16”, -0”
Where allowance has been left on face for finish. All
sizes*
+1/8”,
-1/16”
In accordance with ANSIB16.5

*Tolerance for these dimensions not covered by ANSIB16.5