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Dimensional Tolerances
 
For Weldbend Forged Steel Pipe Flanges
 
Listed below are the dimensional tolerances to which Weldbend flanges are manufactured. These tolerances are a part of ASME B16.5 except where noted otherwise. The limits given are maximum.
Slip-On, Threaded, Blind and Lap Joint

 
Outside
Diameter		 When O.D. is 24" or less + .06" *
When O.D. is over 24" + .12" *
Inside
Diameter		 Threaded To Standard Gauge Limits
Slip-On and Lap-Joint 10" and Smaller
+ .03", - 0"

12" and Larger
+ .06", - 0"
Outside Diameter of Hub   12" and Smaller
+ .09", - .06"
Over 14"
+ .12"
Diameter of Contact Face   0.06" Raised Face
+ .03"
+ .02"
Diameter of Counterbore   10" and Smaller
+ .03", - .03"
12" thru 24"
+ .06", - 0"
Drilling Bolt Circle 1/2" - 24"
+ .06"
Hole Spacing + .03"
Eccentricity of Bolt Circle with Respect to Facing 2 1/2" and Smaller
.03" Max.
3" and Larger
.06" Max.
Eccentricity of Bolt Circle with Respect to Bore .03" Max. *  ***
Eccentricity of Facing with Respect to Bore .03" Max. *
Thickness 18" and Smaller
+.12", - 0
20" thru 24"
+ .19", - 0
Length Thru Hub   10" and Smaller
+ .06" *, - 0
12" thru 24"
+ .12" *

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