Dimensional Tolerances (Threaded, Slip-On, Lap Joint and Blind) : ASME B16.5

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 DiameterThreadedWithin limits on boring gauge
Slip-On and Lap Joint 10” and smaller+ 1/32”, -0”
12” and larger+1/16”, -0”
Diameter of Counterbore10” and smaller+1/32”, -0”
12” and larger+1/16”, -0”
Diameter of Contact Face1/16” 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 Hub18” and smaller+1/8”, -1/32”
20” and larger+3/16”, -1/16”
Thickness18” 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