Threaded, Slip-On, Lap Joint
And Blind Flanges |
|
Welding Neck Flanges |
Inside
Diameter |
Threaded |
Within limits on
boring guage |
|
Inside
Diameter |
10" and smaller
12" through 18"
20" and larger |
+- 1/32"
+- 1/16"
+ 1/8", -1/16" |
Slip-On and
Lap Joint
10 " and smaller
|
+ 1/32", -0" |
|
Diameter
of Contact
Face |
1/16" Raised Face
1/4" Raised Face
Tongue and
Groove or Male
and Female |
+- 1/32"
+- 1/64" |
| 12" and larger |
-1/16", -0" |
|
Diameter
of Hub at point
of welding |
5" and Smaller
6" and larger |
+ 3/32", -1/32
+ 5/32", -1/32" |
Diameter of
Counterbore |
Same as for
Inside Diameter |
|
|
Diameter of
Hub at Base* |
When hub Base is
24" or less
When hub Base is
over 24"
|
+- 1/16"
+- 1/8" |
Diameter of
Contact Face |
1/16" Raised Face
1/4" Raised Face
Tongue and
Groove or Male
and Female |
+- 1/32"
+- 1/64" |
|
Drilling |
Bolt Circle
Bolt hole spacing |
+- 1/16"
+- 1/32" |
Outside
Diameter
of Hub |
12" and Smaller
14" and Larger |
+ 3/32", -1/16"
+- 1/8" |
|
Eccentricity Bolt
Circle & Facing
(with Respect
to Bore) * |
2/12" and smaller
3" and larger |
1/32" max.
1/16" max. |
| Drilling |
Bolt Circle
Bolt hole Spacing |
+- 1/16"
+- 1/32" |
|
Length Thru Hub* |
10" and smaller
12" and larger |
+- 1/16"
+- 1/8" |
Eccentricity Bolt
Circle & Facing
(with Respect
to Bore*) |
21/2" and smaller |
1/32" max. |
|
Thickness |
18" and smaller |
+- 1/8", -0" |
Length Thru
Hub* |
18" and smaller
20" and larger |
+ 1/8", -1/6"
+ 3/16", -1/16" |
|
20" and larger |
+ 3/16", -0" |
| Thickness |
18" and smaller
20" and larger
Where allowance
has been left on
face for finish
All Sizes* |
+ 1/8", -0"
+ 3/6" -0"
+- 1/8", -1/16" |
|
Where allowance
has been left on
face for finish
All sizes* |
+ 1/8", -1/16" |
