DIMENSIONAL TOLERANCES

 

Threaded, Socket-Welding, Slip-on, Lap Joint and Blind

Outside
Diameter

When O.D. is 24" or less

+ 1/16" (1.6 mm)

When O.D. is 24"

+ 1/8" (3.2 mm)

Inside
Diameter

Threaded

Within limits on boring gauge

Socket-Welding, Slip-on and Lap Joint

10" & Smaller + 1/32" (0.8 mm), - 0"
12" & Larger + 1/16" (1.6 mm), - 0"

Outside
Diameter of Hub

12" and Smaller

+ 1/32" (0.8mm)
- 1/32" (1.6 mm)

14" and Larger

+ 1/8" (3.2 mm)

Diameter of Contact Face

1/16" Raised Face

+ 1/32" (0.8 mm)

1/4" Raised Face Tongue & Groove Male, Female

+ 1/64" (0.4 mm)

Diameter of Counter bore

Same as for Inside Diameter

Drilling

Bolt Circle

+ 1/16" (1.6 mm)

Bolt Hole Spacing

+ 1/32" (0.8 mm)

Eccentricity of Bolt Circle with Respect to Facing

2˝" & Smaller 1/32" (0.8 mm) Max
3" & Larger 1/16" (1.6 mm) Max

Eccentricity of Bolt Circle with Respect to Bore

1/32" (0.8 mm) Max

Eccentricity of Facing with Respect to Bore

1/32" (0.8 mm) Max

Thickness

18" and Smaller

+ 1/8" (3.2 mm), - 0"

20" and Larger

+ 3/16" (4.8 mm), - 0"

Length
Thru Hub

10" and Smaller

+ 1/16" (1.6 mm)

12" and Larger

+ 1/8" (3.2 mm)

Welding Neck

Outside
Diameter

When O.D. is 24" or less

+ 1/16" (1.6 mm)

When O.D. is 24"

+ 1/8" (3.2 mm)

Inside

Diameter

10" and Smaller

+ 1/32" (0.8 mm)

12" thru 18"

+ 1/16" (1.6 mm)

20" and Larger

+ 1/8" (3.2 mm)
-1/16" (1.6 mm)

Diameter of Contact Face

1/16" Raised Face

+ 1/32" (0.8 mm)

1/4" Raised Face Tongue & Groove Male, Female

+ 1/64" (0.4 mm)

Diameter of Hub at Base

When Hub Base is Over 24"

+ 1/16" (1.6 mm)

When Hub Base is Over 24"

+ 1/8" (3.2 mm)

Diameter of Hub at Point of Welding

5" and Smaller

+ 3/32" (2.4 mm)
- 1/32" (0.8 mm)

6" and Larger

+ 5/32" (4.0 mm)
- 1/32" (0.8 mm)

Drilling

Bolt Circle

+ 1/16" (1.6 mm)

Bolt Hole Spacing

+ 1/32" (0.8 mm)

Eccentricity of Bolt Circle with Respect to Facing

2˝" & Smaller 1/32" (0.8 mm) Max
3" & Larger 1/16" (1.6 mm) Max

Eccentricity of Bolt Circle with Respect to Bore

1/32" (0.8 mm) Max

Eccentricity of Facing with Respect to Bore

1/32" (0.8 mm) Max

Thickness

18" and Smaller

+ 1/8" (3.2 mm), - 0"

20" and Larger

+ 3/16" (4.8 mm), - 0"

Length
Thru Hub

10" and Smaller

+ 1/16" (1.6 mm)

12" and Larger

+ 1/8" (3.2 mm)

 

 

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