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ASME B16.11 Couplet | SW & Threaded
December 7, 2021
Technical Drawing & Function
The drawing of ASME B16.11 socket welding (SW) couplet. B: socket bore diameter; C: socket wall thickness; D: bore diameter of SW couplet; J: socket depth; G: outside diameter of couplet; Q: weld ring length; M: end to end couplet; N: weld ring diameter.
The drawing of ASME B16.11 forged couplet with threaded ends. B: minimum length of perfect thread; L2: effective length of external thread; E: outside diameter of couplet; M: end-to-end coupling; N: weld ring diameter; Q: weld ring length.
The ASME B16.11 couplet is primarily used to connect two pipes. It resembles a welding boss except that a straight length (Q) of weld ring is furnished. One end of the couplet is furnished with socket welding (SW) or threaded connection; the other end is furnished with a bevelled transition to a straight length of welding ring, which will be joined to the pipe by welding. Available pressure ratings: SW – Class 3000, 6000, 9000; Threaded – Class 3000, 6000.
| ASME B16.11 Forged Fittings (SW & THD) | ||
|---|---|---|
| 90° Elbow | 45° Elbow | Cross |
| Tee | Coupling | Half Coupling |
| Boss | Cap | Couplet |
| Street Elbow* | Plug* | Bushing* |
Dimensions & Masses of ASME B16.11 SW Couplet
| NPS | B max. | B min. | J min. |
|---|---|---|---|
| 1/8" | 11.2 | 10.8 | 9.5 |
| 1/4" | 14.6 | 14.2 | 9.5 |
| 3/8" | 18.0 | 17.6 | 9.5 |
| 1/2" | 22.2 | 21.8 | 9.5 |
| 3/4" | 27.6 | 27.2 | 12.5 |
| 1" | 34.3 | 33.9 | 12.5 |
| 1-1/4" | 43.1 | 42.7 | 12.5 |
| 1-1/2" | 49.2 | 48.8 | 12.5 |
| 2" | 61.7 | 61.2 | 16.0 |
| 2-1/2" | 74.4 | 73.9 | 16.0 |
| 3" | 90.3 | 89.8 | 16.0 |
| 4" | 115.7 | 115.2 | 19.0 |
| NPS | 3000# | 6000# | 9000# | |||
| C max. | C min. | C max. | C min. | C max. | C min. |
|
| 1/8" | 3.18 | 3.18 | 3.96 | 3.43 | - | - |
| 1/4" | 3.78 | 3.30 | 4.60 | 4.01 | - | - |
| 3/8" | 4.01 | 3.50 | 5.03 | 4.37 | - | - |
| 1/2" | 4.67 | 4.09 | 5.97 | 5.18 | 9.35 | 8.18 |
| 3/4" | 4.90 | 4.27 | 6.96 | 6.04 | 9.78 | 8.56 |
| 1" | 5.69 | 4.98 | 7.92 | 6.93 | 11.38 | 9.96 |
| 1-1/4" | 6.07 | 5.28 | 7.92 | 6.93 | 12.14 | 10.62 |
| 1-1/2" | 6.35 | 5.54 | 8.92 | 7.80 | 12.70 | 11.12 |
| 2" | 6.93 | 6.04 | 10.92 | 9.50 | 13.84 | 12.12 |
| 2-1/2" | 8.76 | 7.67 | - | - | - | - |
| 3" | 9.52 | 8.30 | - | - | - | - |
| 4" | 10.69 | 9.53 | - | - | - | - |
| NPS | Q | M | N |
|---|---|---|---|
| 1/8" | - | - | - |
| 1/4" | 9.5 | 30.2 | 17.5 |
| 3/8" | 9.5 | 30.2 | 20.7 |
| 1/2" | 9.5 | 33.4 | 23.8 |
| 3/4" | 9.5 | 34.9 | 27.0 |
| 1" | 9.5 | 47.6 | 42.9 |
| 1-1/4" | 9.5 | 47.6 | 42.9 |
| 1-1/2" | 9.5 | 50.8 | 49.2 |
| 2" | 9.5 | 57.2 | 61.9 |
| 2-1/2" | 9.5 | 63.5 | 73.0 |
| 3" | 9.5 | 69.9 | 88.9 |
| 4" | 9.5 | 76.2 | 114.3 |
| NPS | G 3000# mm | G 6000# mm | Mass 3000# kg | Mass 6000# kg |
|---|---|---|---|---|
| 1/8" | - | - | - | - |
| 1/4" | 23.8 | 25.4 | 0.07 | 0.14 |
| 3/8" | 27.0 | 31.8 | 0.08 | 0.23 |
| 1/2" | 33.4 | 38.1 | 0.17 | 0.30 |
| 3/4" | 38.1 | 44.5 | 0.22 | 0.52 |
| 1" | 46.1 | 57.2 | 0.37 | 0.92 |
| 1-1/4" | 55.6 | 63.5 | 0.53 | 1.10 |
| 1-1/2" | 63.5 | 76.2 | 0.68 | 1.30 |
| 2" | 79.4 | 92.1 | 0.82 | 2.00 |
| 2-1/2" | 92.1 | 108.0 | - | - |
| 3" | 111.1 | 127.0 | - | - |
| 4" | 141.3 | 158.8 | - | - |
Dimensions & Masses of ASME B16.11 Threaded Couplet
| NPS | B | L2 |
|---|---|---|
| 1/8" | 6.4 | 6.7 |
| 1/4" | 8.1 | 10.2 |
| 3/8" | 9.1 | 10.4 |
| 1/2" | 10.9 | 13.6 |
| 3/4" | 12.7 | 13.9 |
| 1" | 14.7 | 17.3 |
| 1-1/4" | 17.0 | 18.0 |
| 1-1/2" | 17.8 | 18.4 |
| 2" | 19.0 | 19.2 |
| 2-1/2" | 23.6 | 28.9 |
| 3" | 25.9 | 30.5 |
| 4" | 27.7 | 33.0 |
| NPS | E 3000# | E 6000# |
|---|---|---|
| 1/8" | - | - |
| 1/4" | 23.8 | 25.4 |
| 3/8" | 27.0 | 31.8 |
| 1/2" | 33.4 | 38.1 |
| 3/4" | 38.1 | 44.5 |
| 1" | 46.1 | 57.2 |
| 1-1/4" | 55.6 | 63.5 |
| 1-1/2" | 63.5 | 76.2 |
| 2" | 76.2 | 79.4 |
| 2-1/2" | 92.1 | 92.1 |
| 3" | 111.1 | 111.1 |
| 4" | 141.3 | 141.3 |
| NPS | Q | M | N |
|---|---|---|---|
| 1/8" | - | - | - |
| 1/4" | 9.5 | 30.2 | 17.5 |
| 3/8" | 9.5 | 30.2 | 20.7 |
| 1/2" | 9.5 | 33.4 | 23.8 |
| 3/4" | 9.5 | 34.9 | 27.0 |
| 1" | 9.5 | 42.9 | 42.9 |
| 1-1/4" | 9.5 | 47.6 | 42.9 |
| 1-1/2" | 9.5 | 50.8 | 49.2 |
| 2" | 9.5 | 57.2 | 61.9 |
| 2-1/2" | 9.5 | 63.5 | 73.0 |
| 3" | 9.5 | 69.9 | 114.3 |
| 4" | 9.5 | 76.2 | 114.3 |
| NPS | Mass 3000# kg | Mass 6000# kg |
|---|---|---|
| 1/8" | 0.06 | - |
| 1/4" | 0.07 | 0.14 |
| 3/8" | 0.08 | 0.23 |
| 1/2" | 0.14 | 0.33 |
| 3/4" | 0.20 | 0.42 |
| 1" | 0.34 | 0.61 |
| 1-1/4" | 0.55 | 1.10 |
| 1-1/2" | 0.60 | 1.20 |
| 2" | 0.77 | 1.85 |
| 2-1/2" | - | - |
| 3" | - | - |
| 4" | - | - |
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