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Dimensions Butt Weld Reducers Con & Ecc ASME B16.9
Jun 30, 2017

Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.

DIMENSIONAL TOLERANCES OF CONCENTRIC AND ECCENTRIC REDUCERS ASME B16.9

Nominal Pipe Size

1/2 to 2½

3 to 3½

4

5 to 8

Outside Diameter
at Bevel (D)

+ 1.6
- 0.8

1.6

1.6

+ 2.4
- 1.6

Inside Diameter at End

0.8

1.6

1.6

1.6

Overall Length (H)

2

2

2

2

Nominal Pipe Size

10 to 18

20 to 24

26 to 30

32 to 48

Outside Diameter
at Bevel (D)

+ 4
- 3.2

+ 6.4
- 4.8

+ 6.4
- 4.8

+ 6.4
- 4.8

Inside Diameter at End

3.2

4.8

+ 6.4
- 4.8

+ 6.4
- 4.8

Overall Length (H)

2

2

5

5

Wall Thickness (t)

Not less than 87.5% of Nominal Wall Thickness