Slip-on, Threaded, Blind Flanges Tolerance

Tolerances For Flanges: 
Slip-On, Theaded, Blind 
Outside Diameter
24" and smaller 
± 1.6 mm.
26" and Larger 
± 3.2 mm.
Inside Diameter
Flanges Slip-On,
Lap-Joint
 
10" and smaller
+0.8 mm.
- 0 mm.
12" and Larger
+1.6 mm. - 0 mm.
Threaded Flanges
Tolerance as Thread's Thickness 
Socket Diameter
at the
Point of Thread
10" and smaller
+0.8 mm.
- 0 mm.
12" and Larger
+1.6 mm
- 0 mm.
Diameter of the Contact Face 
Raised Face 1.6 mm.
± 0.8 mm.
Raised Face 6.35 mm.
± 0.5 mm.
Tonge and Groove 
± 0.5 mm.
Male and Female 
± 0.5 mm.
Outside Diameter
of Hub
12" and smaller
+ 2.4mm -1.6mm.
14" and Larger
± 3.2mm.
Drilling
Boltcircle
± 1.6 mm.
Bolt Hole Spacing
± 0.5 mm.
Excentricity of
Boltcircle facing with
respect to bore
 
≤ 2.1/2" 0.8 mm.   
≥ 3" 1.6 mm.
Overall Height
18" and smaller
+ 3.2 mm. - 0.8 mm.
20" and Larger
+ 4.8 mm. - 1.6 mm.
Thickeness
18" and smaller
+ 3.2 mm. - 0 mm.
20" and Larger
+ 4.8 mm. - 0 mm.

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