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
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
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

All dimensions are in millimeters unless otherwise indicated.
Wall thickness (T) must be specified by customer.



Elbow 90 deg Reducing

Dimensional 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

Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.

Other Dimensions Butt Weld Elbows

BW elbows 90/45 deg.
BW elbows 90/45°
Elbows are split into two groups which define the distance over which they change direction; the center line of one end to the opposite face...



BW elbows 90 deg. short radius
BW elbows 90° SR
The center to face distance for a long radius elbow, abbreviated LR always is 1.1/2 x Nominal Pipe Size (NPS) (1.1/2D), while the center to face distance for a short radius elbow, abbreviated SR even is to nominal pipe size...



BW elbows 180 deg. long and short radius
BW elbows 180° LR & SR
The function of a 180° elbow is to change direction of flow through 180°. Both, the LR and the SR types have a center to center dimension double the matching 90° elbows...




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