ASME B16.11 socket weld and threaded fitting dimensions
Elbows, tees, crosses and couplings, ½ to 4 inch, Class 2000, 3000 and 6000. Every dimension in mm, with a section drawing made to scale.
Socket weld and threaded fitting finder
Choose fitting, class and size. The section and every dimension update together.
Forged fitting dimension finder
ASME B16.11 socket weld and threaded elbows, tees, crosses and couplings, Class 2000, 3000 and 6000, ½ to 4 inch. The section redraws to scale for every fitting, class and size.
Dimensions in mm per ASME B16.11. Socket weld Class 9000 and threaded caps, plugs and bushings on request.
Socket weld fittings, Class 3000
| Size | B socket bore | J socket depth | D bore | C socket wall | G body wall | A 90° / tee | A 45° | E coupling | F half coupling | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" (15 NB) | 21.70–21.95 | 10 | 15.0–16.6 | 4.65 | 3.75 | 15.5 | 11.5 | 9.5 | 22.5 | Quote |
| 3/4" (20 NB) | 27.05–27.30 | 13 | 20.2–21.7 | 4.90 | 3.90 | 19.5 | 12.5 | 9.5 | 23.5 | Quote |
| 1" (25 NB) | 33.80–34.05 | 13 | 25.9–27.4 | 5.70 | 4.55 | 22 | 14 | 13 | 29 | Quote |
| 1-1/4" (32 NB) | 42.55–42.80 | 13 | 34.3–35.8 | 6.05 | 4.85 | 27 | 17 | 13 | 30 | Quote |
| 1-1/2" (40 NB) | 48.65–48.90 | 13 | 40.1–41.7 | 6.35 | 5.10 | 32 | 21 | 13 | 32 | Quote |
| 2" (50 NB) | 61.10–61.35 | 16 | 51.7–53.5 | 6.95 | 5.55 | 38 | 25 | 19 | 41 | Quote |
| 2-1/2" (65 NB) | 73.80–74.20 | 16 | 61.2–64.2 | 8.75 | 7.00 | 41.5 | 29 | 19 | 42.5 | Quote |
| 3" (80 NB) | 89.80–90.15 | 16 | 76.4–79.5 | 9.50 | 7.60 | 57.5 | 31.5 | 19 | 44.5 | Quote |
| 4" (100 NB) | 115.45–115.80 | 19 | 100.7–103.8 | 10.70 | 8.55 | 66.5 | 41.5 | 19 | 47.5 | Quote |
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Socket weld fittings, Class 6000
| Size | B socket bore | J socket depth | D bore | C socket wall | G body wall | A 90° / tee | A 45° | E coupling | F half coupling | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" (15 NB) | 21.70–21.95 | 10 | 11.0–12.5 | 5.95 | 4.80 | 19.5 | 12.5 | 9.5 | 22.5 | Quote |
| 3/4" (20 NB) | 27.05–27.30 | 13 | 14.8–16.3 | 6.95 | 5.55 | 22.5 | 14.5 | 9.5 | 23.5 | Quote |
| 1" (25 NB) | 33.80–34.05 | 13 | 19.9–21.5 | 7.90 | 6.35 | 27 | 17 | 13 | 29 | Quote |
| 1-1/4" (32 NB) | 42.55–42.80 | 13 | 28.7–30.2 | 7.90 | 6.35 | 32 | 21 | 13 | 30 | Quote |
| 1-1/2" (40 NB) | 48.65–48.90 | 13 | 33.2–34.7 | 8.90 | 7.15 | 38 | 25 | 13 | 32 | Quote |
| 2" (50 NB) | 61.10–61.35 | 16 | 42.1–43.6 | 10.90 | 8.75 | 41 | 29 | 19 | 41 | Quote |
Threaded fittings, Class 2000
| Size | A 90° / tee | A 45° | D band OD | G wall | B thread | J useful thread | Coupling W / D | |
|---|---|---|---|---|---|---|---|---|
| 1/2" (15 NB) | 28 | 22 | 33 | 3.18 | 10.9 | 13.6 | – | Quote |
| 3/4" (20 NB) | 33 | 25 | 38 | 3.18 | 12.7 | 13.9 | – | Quote |
| 1" (25 NB) | 38 | 28 | 46 | 3.68 | 14.7 | 17.3 | – | Quote |
| 1-1/4" (32 NB) | 44 | 33 | 56 | 3.89 | 17 | 18 | – | Quote |
| 1-1/2" (40 NB) | 51 | 35 | 62 | 4.01 | 17.8 | 18.4 | – | Quote |
| 2" (50 NB) | 60 | 43 | 75 | 4.27 | 19 | 19.2 | – | Quote |
| 2-1/2" (65 NB) | 76 | 52 | 92 | 5.61 | 23.6 | 28.9 | – | Quote |
| 3" (80 NB) | 86 | 64 | 109 | 5.99 | 25.9 | 30.5 | – | Quote |
| 4" (100 NB) | 106 | 79 | 146 | 6.55 | 27.7 | 33 | – | Quote |
Threaded fittings, Class 3000
| Size | A 90° / tee | A 45° | D band OD | G wall | B thread | J useful thread | Coupling W / D | |
|---|---|---|---|---|---|---|---|---|
| 1/2" (15 NB) | 33 | 25 | 38 | 4.09 | 10.9 | 13.6 | 48 / 28 | Quote |
| 3/4" (20 NB) | 38 | 28 | 46 | 4.32 | 12.7 | 13.9 | 51 / 35 | Quote |
| 1" (25 NB) | 44 | 33 | 56 | 4.98 | 14.7 | 17.3 | 60 / 44 | Quote |
| 1-1/4" (32 NB) | 51 | 35 | 62 | 5.28 | 17 | 18 | 67 / 57 | Quote |
| 1-1/2" (40 NB) | 60 | 43 | 75 | 5.56 | 17.8 | 18.4 | 79 / 64 | Quote |
| 2" (50 NB) | 64 | 44 | 84 | 7.14 | 19 | 19.2 | 86 / 76 | Quote |
| 2-1/2" (65 NB) | 83 | 52 | 102 | 7.65 | 23.6 | 28.9 | 92 / 92 | Quote |
| 3" (80 NB) | 95 | 64 | 121 | 8.84 | 25.9 | 30.5 | 108 / 108 | Quote |
| 4" (100 NB) | 114 | 79 | 152 | 11.18 | 27.7 | 33 | 121 / 140 | Quote |
Threaded fittings, Class 6000
| Size | A 90° / tee | A 45° | D band OD | G wall | B thread | J useful thread | Coupling W / D | |
|---|---|---|---|---|---|---|---|---|
| 1/2" (15 NB) | 38 | 28 | 46 | 8.15 | 10.9 | 13.6 | 48 / 38 | Quote |
| 3/4" (20 NB) | 44 | 33 | 56 | 8.53 | 12.7 | 13.9 | 51 / 44 | Quote |
| 1" (25 NB) | 51 | 35 | 62 | 9.93 | 14.7 | 17.3 | 60 / 57 | Quote |
| 1-1/4" (32 NB) | 60 | 43 | 75 | 10.59 | 17 | 18 | 67 / 64 | Quote |
| 1-1/2" (40 NB) | 64 | 44 | 84 | 11.07 | 17.8 | 18.4 | 79 / 76 | Quote |
| 2" (50 NB) | 83 | 52 | 102 | 12.09 | 19 | 19.2 | 86 / 92 | Quote |
| 2-1/2" (65 NB) | 95 | 64 | 121 | 15.29 | 23.6 | 28.9 | 92 / 108 | Quote |
| 3" (80 NB) | 106 | 79 | 146 | 16.64 | 25.9 | 30.5 | 108 / 127 | Quote |
| 4" (100 NB) | 114 | 79 | 152 | 18.67 | 27.7 | 33 | 121 / 159 | Quote |
What the letters mean
- ACentre to bottom of socket (socket weld) or centre to end (threaded)
- BSocket bore (socket weld) or minimum length of perfect thread (threaded)
- JSocket depth (socket weld) or minimum useful thread length (threaded)
- DBore diameter (socket weld) or outside diameter of band (threaded)
- CSocket wall thickness, average
- GBody wall thickness, minimum
- ELaying length of a socket weld coupling
- FLaying length of a socket weld half coupling
- WOverall length of a threaded coupling
Questions buyers ask
Which class of socket weld fitting matches my pipe schedule?
As a guide, Class 3000 socket weld fittings suit Schedule 80 pipe and Class 6000 suit Schedule 160. For threaded fittings, Class 2000 suits Schedule 80, Class 3000 Schedule 160 and Class 6000 XXS.
Why is there a gap at the bottom of a socket weld joint?
ASME B31.3 asks for an expansion gap of about 1.6 mm (1/16 in) between the pipe end and the socket bottom before welding, so the weld does not crack as it cools.
What thread do B16.11 threaded fittings use?
Taper pipe threads to ASME B1.20.1 (NPT). BSPT threads are made on request.
Which grades do you make forged fittings in?
A105, LF2, F11, F22, F91, F304L, F316L, F321, F904L, duplex F51 and F60, super duplex F53 and F55, nickel alloys and titanium, with EN 10204 3.1 certificates.
Get a quotation from the manufacturer
Send your BOQ, drawing or tender reference. You deal directly with the manufacturer.
- Reply from our estimation team, usually within one working day
- Carbon steel to titanium on one order
- EN 10204 3.1 or 3.2 certificates, third-party inspection welcome
- ISO 9001:2015 certified and IBR approved, since 1971
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