Tolerance of Fittings

According to ANSI B16.9

All Fittings

90° & 45°

Reducers

Caps

180° Returns

Nominal

Angularity Tolerance

Elbows and

Pipe Size

Tees

Nominal Pipe Size (NPS)

Outside(1)  Diameter at Bevel

Inside (2) Dianeter at End

Wall(2) Thickness

Center to End Dimension

Overall Length

Overall Length

Center to Center Dimension

Back to Face Dimension

Alignment Of Ends

Off Angel

Off Plane

D

T

A.B.C.M.

H

E

O

K

U

Q

P

1/2" to 2½"

±1

±0.8

±2

±2

±4

±7

±7

±1

1/2 to 4"

±1

±2

3" to 3½"

±1

±1.6

±2

±2

±4

±7

±7

±1

5" to 8"

±2

±4

4"

±2-1

±1.6

Not

±2

±2

±4

±7

±7

±1

10" to 12"

±3

±5

5" to 6"

±3-1

±1.6

Less Than

±2

±2

±7

±7

±7

±1

14" to 16"

±3

±7

8"

±2

±1.6

87.50%

±2

±2

±7

±7

±7

±1

18" to 24"

±4

±10

10"

+4-3

±3.2

of Nominal

±2

±2

±7

±10

±7

±2

26" to 30"

±5

±10

12" to 18"

+4-3

±3.2

Thickness

±3

±3

±7

±10

±7

±2

32" to 42"

±5

±13

20" to 24"

+6-5

±4.8

±3

±3

±7

±10

±7

±2

44" to 48"

±5

±20

26" to 30"

+7-5

±4.8

±3

±3

±10

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32" to 48"

+7-5

±4.8

±5

±5

±10

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