Short Radius Elbow is a type of pipe fitting which is used as a connection point between two lengths of pipes to produce a change in the direction of flow in the pipe, usually at an angle of 90°, 45° or 180°. The short radius elbows have a center to end distance that is 1.5 times the NPS in inches (R=1.5D), while the short radius is equal to the NPS in inches (R=1.0D). Short radius elbows are generally used in tight areas, and short radius elbows are used when space is available and flow is more critical. Pipeline System can also manufacture and supply carbon steel elbows and stainless steel elbows in non-standard size angles such as 60°, 100°, 120° or 150°. The ends of may be machined for butt welding, threaded (usually female), or socketed, etc. When the two ends differ in size, the fitting is called a reducing elbow or reducer elbow.Pipeline System can manufacture elbows with Nominal Pipe Sizes ranging from 1/2″ to 48″. Wall Thickness of 45° and 90° Short Radius Elbow Not less than 87.5% of Nominal Wall Thickness. Schedule ranging from Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc.
Buttweld 45° Short Radius elbow
Sizes: 1/2” TO 36” (SEAMLESS UPTO 24”) (WELDED 8” TO 36” )
Standards: ANSI – B 16.9
ASTM A403 – ASME SA403 – ‘Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings’
API 590-605
ASME B16.9 – ‘Factory-Made Wrought Buttwelding Fittings’
ASME B16.25 – ‘Buttwelding Ends’
ASME B16.28 – ‘Wrought Steel Buttwelding Short Radius Elbows and Returns’
MSS SP-43 – ‘Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications’
Schedule: Sch 5 TO Sch XXS.
Thickness: Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc.
Type: Buttweld (BW)
Nom. Pipe Size |
Pipe Sched. or No. |
Center- to-end Dimen. |
Outside Dia. |
Inside Dia. |
Wall Thick. |
Approx. Weight (lb.) |
F | OD | ID | T | |||
STANDARD WEIGHT | ||||||
1/2 | 40 | 5/8 | 0.840 | 0.622 | 0.109 | 0.1 |
3/4 | 40 | 7/16 | 1.050 | 0.824 | 0.113 | 0.1 |
1 | 40 | 7/8 | 1.315 | 1.049 | 0.133 | 0.2 |
1 1/4 | 40 | 1 | 1.660 | 1.380 | 0.140 | 0.4 |
1 1/2 | 40 | 1 1/8 | 1.900 | 1.610 | 0.145 | 0.5 |
2 | 40 | 1 3/8 | 2.375 | 2.067 | 0.154 | 0.9 |
2 1/2 | 40 | 1 3/4 | 2.875 | 2.469 | 0.203 | 1.5 |
3 | 40 | 2 | 3.500 | 3.068 | 0.216 | 2.5 |
3 1/2 | 40 | 2 1/4 | 4.000 | 3.548 | 0.226 | 3.5 |
4 | 40 | 2 1/2 | 4.500 | 4.026 | 0.237 | 4.8 |
5 | 40 | 3 1/8 | 5.563 | 5.047 | 0.258 | 7.8 |
6 | 40 | 3 3/4 | 6.625 | 6.065 | 0.280 | 12 |
8 | 40 | 5 | 8.625 | 7.981 | 0.322 | 23 |
10 | 40 | 6 1/4 | 10.750 | 10.020 | 0.365 | 42 |
12 | – | 7 1/2 | 12.750 | 12.000 | 0.375 | 61 |
14 | 30 | 8 3/4 | 14.000 | 13.250 | 0.375 | 79 |
16 | 30 | 10 | 16.000 | 15.250 | 0.375 | 103 |
18 | – | 11 1/4 | 18.000 | 17.250 | 0.375 | 132 |
20 | 20 | 12 1/2 | 20.000 | 19.250 | 0.375 | 160 |
22 | 20 | 13 1/2 | 22.000 | 21.250 | 0.375 | 195 |
24 | 20 | 15 | 24.000 | 23.250 | 0.375 | 238 |
EXTRA STRONG | ||||||
Nom. Pipe Size |
Pipe Sched. or No. |
Center- to-end Dimen. |
Outside Dia. |
Inside Dia. |
Wall Thick. |
Approx. Weight (lb.) |
F | OD | ID | T | |||
1/2 | 80 | 5/8 | 0.840 | 0.546 | 0.147 | 0.2 |
3/4 | 80 | 7/16 | 1.050 | 0.742 | 0.154 | 0.3 |
1 | 80 | 7/8 | 1.315 | 0.957 | 0.179 | 0.4 |
1 1/4 | 80 | 1 | 1.660 | 1.278 | 0.191 | 0.5 |
1 1/2 | 80 | 1 1/8 | 1.900 | 1.500 | 0.200 | 0.6 |
2 | 80 | 1 3/8 | 2.375 | 1.939 | 0.218 | 1.1 |
2 1/2 | 80 | 1 3/4 | 2.875 | 2.323 | 0.276 | 2.1 |
3 | 80 | 2 | 3.500 | 2.900 | 0.300 | 3.5 |
3 1/2 | 80 | 2 1/4 | 4.000 | 3.364 | 0.318 | 4.8 |
4 | 80 | 2 1/2 | 4.500 | 3.826 | 0.337 | 6.5 |
5 | 80 | 3 1/8 | 5.563 | 4.813 | 0.375 | 11 |
6 | 80 | 3 3/4 | 6.625 | 5.761 | 0.432 | 18 |
8 | 80 | 5 | 8.625 | 7.625 | 0.500 | 35 |
10 | 60 | 6 1/4 | 10.750 | 9.750 | 0.500 | 56 |
12 | – | 7 1/2 | 12.750 | 11.750 | 0.500 | 80 |
14 | – | 8 3/4 | 14.000 | 13.000 | 0.500 | 100 |
16 | 40 | 10 | 16.000 | 15.000 | 0.500 | 131 |
18 | – | 11 1/4 | 18.000 | 17.000 | 0.500 | 172 |
20 | 30 | 12 1/2 | 20.000 | 19.000 | 0.500 | 210 |
22 | 30 | 13 1/2 | 22.000 | 21.000 | 0.500 | 259 |
24 | – | 15 | 24.000 | 23.000 | 0.500 | 302 |
Ansi 16.9 tolerances – 45 Degree short radius elbow
DIMENSIONAL TOLERANCES – 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 | tickness | 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 | ….. | ….. | ….. |
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