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Fittings Guide

Dimensions Butt Weld Reducing Elbows 90° LR ASME B16.9

Elbow 90° Reducing
NPS Outside Diameter
at bevel
Center
to End
A
Large
End
Small
End
4 - 3 114,3 88,9 152
4 - 2.1/2 114,3 73 152
4 - 2 114,3 60,3 152
5 - 4 141,3 114,3 190
5 - 3.1/2 141,3 101,6 190
5 - 3 141,3 88,9 190
5 - 2.1/2 141,3 73 190
6 - 5 168,3 141,3 229
6 - 4 168,3 114,3 229
6 - 3.1/2 168,3 101,6 229
6 - 3 168,3 88,9 229
8 - 6 219,1 168,3 305
8 - 5 219,1 141,3 305
8 - 4 219,1 114,3 305
Elbow 90° Reducing
NPS Outside Diameter
at bevel
Center
to End
A
Large
End
Small
End
10 - 8 273 219,1 381
10 - 6 273 168,3 381
10 - 5 273 141,3 381
12 - 10 323,8 273 457
12 - 8 323,8 219,1 457
12 - 6 323,8 168,3 457
14 - 12 355,6 323,8 533
14 - 10 355,6 273 533
14 - 8 355,6 219,1 533
16 - 14 406,4 355,6 610
16 - 12 406,4 323,8 610
16 - 10 406,4 273 610
18 - 16 457 406,4 686
Elbow 90° Reducing
NPS Large
End
Small
End
Center
to End
A
Outside Diameter
at bevel
18 - 14 457 355,6 686
18 - 12 457 323,8 686
18 - 10 457 273 686
20 - 18 508 457 762
20 - 16 508 406,4 762
20 - 14 508 355,6 762
20 - 12 508 323,8 762
20 - 10 508 273 762
24 - 22 610 559 914
24 - 20 610 508 914
24 - 18 610 457 914
24 - 16 610 406,4 914
24 - 14 610 355,6 914
24 - 12 610 323,8 914
Dim Tolerances of Butt Weld Red Elbows 90° LR ASME B16.9
Nominal Pipe Size 1/2 to 2.1/2 3 to 3.1/2 4
Outside Diameter
at Bevel
+ 1.6
- 0.8
1.6 1.6
Inside Diameter
at End
0.8 1.6 1.6
Center to End LR (A) 2 2 2
Nominal Pipe Size 5 to 8 10 to 18 20 to 24
Outside Diameter
at Bevel
+ 2.4
- 1.6
+ 4
- 3.2
+ 6.4
- 4.8
Inside Diameter
at End
1.6 3.2 4.8
Center to End LR (A) 2 2 2
Wall Thickness (t) Not less than 87.5% of Nominal Wall Thickness

Note:

  • All dimensions are in millimeters unless otherwise indicated.
  • Wall thickness (t) must be specified by customer.
Reducing Elbow

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