Buttweld Elbow 45/90/180 Deg
Table of Content
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Elbows Lr/SR
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Elbow Dimension
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Elbow Tolerances
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Elbow Applications
Carbon Steel short radius elbows, Short Radius Elbows, Custom Radius Elbows – 45 degrees, 90 degrees, 180 degrees, 1D, 2D, 3D, 4D, 5D, 10D Custom Radius Elbows, Stainless steel short radius elbow Monel 400/K500 Buttweld elbow pipe fittings, Nickel 200/201 Buttweld elbow pipe fittings, Inconel 600/601/625 Buttweld elbow pipe fittings,
The Incoloy 800/800H/800HT Buttweld elbow pipe fittings, the Hastalloy C22/C276 Buttweld elbow pipe fittings, the ASTM A403 WP-S buttweld short radius elbow, the ASTM A403 304/304L buttweld short radius elbow, the ASTM A403 316/316L buttweld short radius elbow, and the Carbon Steel buttweld short radius elbow ASTM / ASME A/SA 234 WP 1.
DETAILED INFORMATION
The most applied version is the 90° long radius and the 45° elbow, while the 90° short radius elbow is applied if there is too little space. The function of a 180° elbow is to change the direction of flow through 180°. Both, the LR and the SR types have a center-to-center dimension double the matching 90° elbows. These fittings will generally be used in Furness or other heating or cooling units.
Dimensions, dimensional tolerances, and more images, can be found in the main Menu Fittings. Other degrees elbows can be machined from a standard elbow. Longer radius type, the center-to-face dimension e.g. is three times the nominal size (3D), even is available.
In addition to the defined elbows, there is the Reducing Elbow, which is an elbow with various diameters on the ends. Because this elbow, for many suppliers it is not a standard item, and thus probably a high price with a long delivery time, the use of a normal elbow with a separate reducer is an option if the situation allows.
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Elbows 45° - 90° - 180° LR/SR
The function of an elbow is to change direction or flow in a piping system. By default, there are 5 opportunities, the 45°, 90°, and 180° elbows, all three in the long radius version, and in addition the 90° and 180° elbows both in the short radius version.
Long and Short Radius
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. This is known as the center-to-face distance and is equivalent to the radius through which the elbow is bent.
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.
45° Elbow
The function of a 45° elbow is the same as a 90° elbow, but the measurement of dimensions is different from that of the 90° elbow.
The radius of a 45° elbow is the same as the radius of a 90° LR (1.1/2D). However, the center-to-face dimension is not equivalent to the radius as in 90° LR elbows. This is measured from each face to the point of intersection of the center lines perpendicular to each other, distances B on the image. This is due to the smaller degree of bend. Short radius 45° elbows are not available.
Wall Thickness of Elbows
The weakest point on an elbow is the inside radius. ASME B16.9 only standardizes the center-to-face dimensions and some squareness dimensional tolerances. The wall thickness at the weld line location even is standardized, but not through the rest of the elbow. The standard states that the minimum tolerance will be within 12.5% of the minimum ordered wall thickness of the pipe. A maximum tolerance is specified only at the ends of the fitting.
Many providers of buttweld elbows (and tees) provide one scheduled greater thickness so that sufficient wall thickness, after forming, remains.
Butt Weld 180 Deg Long Radius Elbow Dimensions
Nom. Pipe Size |
Pipe Sched. or No. |
Center-to-Center Dimen. |
Back- to- Face |
Outside Dia. |
Inside Dia. |
Wall Thick. |
Approx. Weight (lb.) |
H | J | OD | ID | T | |||
STANDARD WEIGHT | |||||||
1/2 | 40 | 3 | 1 7/8 | 0.840 | 0.622 | 0.109 | 0.3 |
3/4 | 40 | 2 1/2 | 1 11/16 | 1.050 | 0.824 | 0.113 | 0.3 |
1 | 40 | 3 | 2 3/16 | 1.315 | 1.049 | 0.133 | 0.7 |
1 1/4 | 40 | 3 3/4 | 2 3/4 | 1.660 | 1.380 | 0.140 | 1 |
1 1/2 | 40 | 4 1/2 | 3 1/4 | 1.900 | 1.610 | 0.145 | 1.5 |
2 | 40 | 6 | 4 3/16 | 2.375 | 2.067 | 0.154 | 3 |
2 1/2 | 40 | 7 1/2 | 5 3/16 | 2.875 | 2.469 | 0.203 | 6 |
3 | 40 | 9 | 6 1/4 | 3.500 | 3.068 | 0.216 | 9 |
3 1/2 | 40 | 10 1/2 | 7 1/4 | 4.000 | 3.548 | 0.226 | 12 |
4 | 40 | 12 | 8 1/4 | 4.500 | 4.026 | 0.237 | 17 |
5 | 40 | 15 | 10 5/16 | 5.563 | 5.047 | 0.258 | 28 |
6 | 40 | 18 | 12 5/16 | 6.625 | 6.065 | 0.280 | 46 |
8 | 40 | 24 | 16 5/16 | 8.625 | 7.981 | 0.322 | 90 |
10 | 40 | 30 | 20 3/8 | 10.750 | 10.020 | 0.365 | 156 |
12 | – | 36 | 24 3/8 | 12.750 | 12.000 | 0.375 | 236 |
14 | 30 | 42 | 28 | 14.000 | 13.250 | 0.375 | 294 |
16 | 30 | 48 | 32 | 16.000 | 15.250 | 0.375 | 404 |
18 | – | 54 | 36 | 18.000 | 17.250 | 0.375 | 512 |
20 | 20 | 60 | 40 | 20.000 | 19.250 | 0.375 | 617 |
24 | 20 | 72 | 48 | 24.000 | 23.250 | 0.375 | 886 |
EXTRA STRONG | |||||||
1/2 | 80 | 3 | 1 7/8 | 0.840 | 0.546 | 0.147 | 0.5 |
3/4 | 80 | 2 1/2 | 1 11/16 | 1.050 | 0.742 | 0.154 | 0.5 |
1 | 80 | 3 | 2 3/16 | 1.315 | 0.957 | 0.179 | 1 |
1 1/4 | 80 | 3 3/4 | 2 3/4 | 1.660 | 1.278 | 0.191 | 1.5 |
1 1/2 | 80 | 4 1/2 | 3 1/4 | 1.900 | 1.500 | 0.200 | 2 |
2 | 80 | 6 | 4 3/16 | 2.375 | 1.939 | 0.218 | 4 |
2 1/2 | 80 | 7 1/2 | 5 3/16 | 2.875 | 2.323 | 0.276 | 7.5 |
3 | 80 | 9 | 6 1/4 | 3.500 | 2.900 | 0.300 | 12 |
3 1/2 | 80 | 10 1/2 | 7 1/4 | 4.000 | 3.364 | 0.318 | 17 |
4 | 80 | 12 | 8 1/4 | 4.500 | 3.826 | 0.337 | 23 |
5 | 80 | 15 | 10 5/16 | 5.563 | 4.813 | 0.375 | 40 |
6 | 80 | 18 | 12 5/16 | 6.625 | 5.761 | 0.432 | 67 |
8 | 80 | 24 | 16 5/16 | 8.625 | 7.625 | 0.500 | 138 |
10 | 60 | 30 | 20 3/8 | 10.750 | 9.750 | 0.500 | 215 |
12 | – | 36 | 24 3/8 | 12.750 | 11.750 | 0.500 | 300 |
14 | – | 42 | 28 | 14.000 | 13.000 | 0.500 | 376 |
16 | 40 | 48 | 32 | 16.000 | 15.000 | 0.500 | 524 |
18 | – | 54 | 36 | 18.000 | 17.000 | 0.500 | 676 |
20 | 30 | 60 | 40 | 20.000 | 19.000 | 0.500 | 824 |
24 | – | 72 | 48 | 24.000 | 20.000 | 0.500 | 1183 |
Elbows – Ansi 16.9 Tolerances
DIMENSIONAL TOLERANCES – Butt Weld 90 Deg Short Radius Elbow / ELBOWS | |||||||
For all fittings | Elbows 90/45 deg | 180° Returns | |||||
Nominal Pipe Size (NPS) |
Outside Ø at Bevel |
Inside Ø at End |
Wall Thickness t / t1 |
Center to End Dim. A-B-C-M |
Center to Center Dim. O |
Back to Face Dim. K |
Align- ment of Ends U |
1/2 a 2 1/2 | 1 | 0,8 | Not | 2 | 7 | 7 | 1 |
3 a 3 1/2 | 1 | 1,6 | less | 2 | 7 | 7 | 1 |
4 | +2 -1 | 1,6 | than | 2 | 7 | 7 | 1 |
5 a 6 | +3 -1 | 1,6 | 87,50% | 2 | 7 | 7 | 1 |
8 | 2 | 1,6 | of nominal | 2 | 7 | 7 | 1 |
10 | +4 -3 | 3,2 | thickness | 2 | 7 | 7 | 2 |
12 a 18 | +4 -3 | 3,2 | 3 | 10 | 7 | 2 | |
20 a 24 | +6 -5 | 4,8 | 3 | 10 | 7 | 2 | |
26 a 30 | +7 -5 | 4,8 | 3 | ….. | ….. | ….. | |
32 a 48 | +7 -5 | 4,8 | 5 | ….. | ….. | ….. |
Butt Weld 90 Deg Short Radius Elbow Angularity Tolerances
ND | Max off angle | Max off plane |
Q | P | |
1/2 a 4 | 1 | 2 |
5 a 8 | 2 | 4 |
10 a 12 | 3 | 5 |
14 a 16 | 3 | 7 |
18 a 24 | 4 | 10 |
26 a 30 | 5 | 10 |
32 a 42 | 5 | 13 |
44 a 48 | 5 | 20 |
Butt Weld 90 Deg Short Radius Elbow Weight Chart
WEIGHTS OF FITTINGS | ||||||||
NPS inches |
ELBOWS LR 90° |
ELBOWS SR 90° |
||||||
Sch. 5S |
Sch. 10S |
Sch. 40S |
Sch. 80S |
Sch. 5S |
Sch. 10S |
Sch. 40S |
Sch. 80S |
|
1/2 | 0.05 | 0.06 | 0.08 | 0.10 | 0.03 | 0.04 | 0.05 | 0.07 |
3/4 | 0.06 | 0.07 | 0.09 | 0.11 | 0.04 | 0.05 | 0.06 | 0.07 |
1 | 0.09 | 0.15 | 0.18 | 0.20 | 0.06 | 0.10 | 0.12 | 0.13 |
1 1/4 | 0.13 | 0.20 | 0.25 | 0.35 | 0.09 | 0.13 | 0.17 | 0.12 |
1 1/2 | 0.18 | 0.30 | 0.40 | 0.50 | 0.12 | 0.20 | 0.27 | 0.33 |
2 | 0.30 | 0.50 | 0.70 | 0.90 | 0.20 | 0.33 | 0.47 | 0.60 |
2 1/2 | 0.60 | 0.85 | 1.35 | 1.80 | 0.40 | 0.60 | 0.90 | 1.20 |
3 | 0.90 | 1.30 | 2.00 | 2.90 | 0.60 | 0.90 | 1.35 | 1.90 |
4 | 1.40 | 2.00 | 4.00 | 5.90 | 0.90 | 1.35 | 2.65 | 3.90 |
5 | 2.90 | 3.60 | 6.50 | 9.70 | 1.95 | 2.40 | 4.35 | 6.50 |
6 | 4.00 | 5.00 | 10.5 | 16.0 | 2.70 | 3.35 | 7.00 | 10.5 |
8 | 7.40 | 10.0 | 21.5 | 33.5 | 4.90 | 6.70 | 14.5 | 22.5 |
10 | 13.6 | 16.8 | 38.5 | 52.5 | 9.10 | 11.2 | 25.6 | 35.0 |
12 | 23.4 | 27.0 | 59.0 | 79.0 | 15.6 | 18.0 | 39.5 | 53.0 |
14 | 29.0 | 35.0 | 70.0 | 94.0 | 19.3 | 23.5 | 47.0 | 63.0 |
16 | 41.3 | 47.0 | 95.0 | 125 | 27.5 | 31.5 | 63.5 | 84.0 |
18 | 51.8 | 59.0 | 120 | 158 | 34.5 | 39.5 | 80.0 | 105 |
20 | 73.0 | 85.0 | 146 | 194 | 49.0 | 57.0 | 98.0 | 129 |
24 | 122 | 140 | 210 | 282 | 82.0 | 94.0 | 140 | 188 |
Applications of Buttweld Elbow:
- Ventilation facility pipeline
- Solar energy facility
- Chemical industrial pipeline
- Water supply facility
- Food and Nourishment Industrial Pipeline
- Agriculture and garden production transporting system
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