Dimensions Butt Weld Elbows

45°-90° LR and 3D ASME B16.9



Butt Weld Elbows 90 and 45 deg LR

NPS O.D.
D
90° LR
A
45° LR
B
90° 3D
A
45° 3D
B
1/2 21.3 38 16    
3/4 26.7 38 19 57 24
1 33.4 38 22 76 31
1.1/4 42.2 48 25 95 39
1.1/2 48.3 57 29 114 47
2 60.3 76 35 152 63
2.1/2 73 95 44 190 79
3 88.9 114 51 229 95
3.1/2 101.6 133 57 267 111
4 114.3 152 64 305 127
5 141.3 190 79 381 157
6 168.3 229 95 457 189
8 219.1 305 127 610 252
10 273 381 159 762 316
12 323.8 457 190 914 378
14 355.6 533 222 1067 441
16 406.4 610 254 1219 505
18 457 686 286 1372 568
20 508 762 318 1524 632
22 559 838 343 1676 694
24 610 914 381 1829 757
26 660 991 406 1981 821
28 711 1067 438 2134 883
30 762 1143 470 2286 946
32 813 1219 502 2438 1010
34 864 1295 533 2591 1073
36 914 1372 565 2743 1135
38 965 1448 600 2896 1200
40 1016 1524 632 3048 1264
42 1067 1600 660 3200 1326
44 1118 1676 695 3353 1389
46 1168 1753 727 3505 1453
48 1219 1829 759 3658 1516

Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer. A & B are Center to End dimensions


Dimensional Tolerances of Butt Weld Elbows 45° & 90° LR & 3D ASME B16.9

Nominal Pipe Size 1/2 to 2.1/2 3 to 3.1/2 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
Center to End LR (A/B) 2 2 2 2
Center to End 3D (A/B) 3 3 3 3
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
Center to End LR (A/B) 2 2 3 5
Center to End 3D (A/B) 3 3 6 6
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.


Note..
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 - NPS 24. Except with regard to the outside diameter at the bevel.

Other Dimensions Butt Weld Elbows

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...



BW reducing elbows 90 deg.
BW reducing elbows 90°
The Reducing Elbow, is a elbow with various diameters on the ends, and for many suppliers it is not a standard item...




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