ASME B16.11 Socket Weld Fitting Dimensions
Dimensions of ASME B16.11 forged socket weld fittings in millimetres for 90° and 45° elbows, tees, crosses, couplings, half couplings and caps in Class 3000, 6000 and 9000, from NPS ⅛" to 4".
Socket weld fittings are used on small-bore, high-pressure lines. The pipe is inserted into the socket and fillet welded. Teshi Group manufactures these fittings as an OEM from ASTM A105 and A182 forgings.
Key to dimensions
- B
- Socket bore diameter (mid-point of the maximum and minimum limits)
- J
- Minimum socket depth
- A
- Centre to bottom of socket
- C
- Minimum socket wall thickness
- D
- Bore diameter of fitting (mid-point of limits)
- E
- Laying length of a full coupling
- F
- Laying length of a half coupling
- K
- Minimum end wall thickness of a cap
ASME B16.11 Socket Weld Fitting dimensions — tables
Socket weld elbows, tees and crosses (mm)
| NPSin | DN | BSocket bore | JSocket depth | A 90°3000 | A 90°6000 | A 90°9000 | A 45°3000 | A 45°6000 | A 45°9000 | C min3000 | C min6000 | C min9000 | D3000 | D6000 | D9000 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ⅛" | 6 | 11.00 | 9.5 | 11 | 11 | — | 8 | 8 | — | 3.18 | 3.43 | — | 6.85 | 4.00 | — |
| ¼" | 8 | 14.40 | 9.5 | 11 | 13.5 | — | 8 | 8 | — | 3.30 | 4.01 | — | 9.25 | 6.35 | — |
| ⅜" | 10 | 17.80 | 9.5 | 13.5 | 15.5 | — | 8 | 11 | — | 3.50 | 4.37 | — | 12.55 | 9.15 | — |
| ½" | 15 | 22.00 | 9.5 | 15.5 | 19 | 25.5 | 11 | 12.5 | 15.5 | 4.09 | 5.18 | 8.18 | 15.80 | 11.75 | 6.40 |
| ¾" | 20 | 27.40 | 12.5 | 19 | 22.5 | 28.5 | 13 | 14 | 19 | 4.27 | 6.04 | 8.56 | 20.95 | 15.55 | 11.05 |
| 1" | 25 | 34.10 | 12.5 | 22.5 | 27 | 32 | 14 | 17.5 | 20.5 | 4.98 | 6.93 | 9.96 | 26.65 | 20.70 | 15.20 |
| 1¼" | 32 | 42.90 | 12.5 | 27 | 32 | 35 | 17.5 | 20.5 | 22.5 | 5.28 | 6.93 | 10.62 | 35.05 | 29.45 | 22.75 |
| 1½" | 40 | 49.00 | 12.5 | 32 | 38 | 38 | 20.5 | 25.5 | 25.5 | 5.54 | 7.80 | 11.12 | 40.85 | 33.95 | 27.95 |
| 2" | 50 | 61.45 | 16.0 | 38 | 41 | 54 | 25.5 | 28.5 | 28.5 | 6.04 | 9.50 | 12.12 | 52.50 | 42.85 | 38.15 |
| 2½" | 65 | 74.15 | 16.0 | 41 | — | — | 28.5 | — | — | 7.67 | — | — | 62.70 | — | — |
| 3" | 80 | 90.05 | 16.0 | 57 | — | — | 32 | — | — | 8.30 | — | — | 77.90 | — | — |
| 4" | 100 | 115.45 | 19.0 | 66.5 | — | — | 41 | — | — | 9.35 | — | — | 102.25 | — | — |
Socket weld couplings, half couplings and caps (mm)
| NPSin | DN | EFull coupling | FHalf coupling | KCap, 3000 | KCap, 6000 | KCap, 9000 |
|---|---|---|---|---|---|---|
| ⅛" | 6 | 6.5 | 16 | 4.8 | 6.4 | — |
| ¼" | 8 | 6.5 | 16 | 4.8 | 6.4 | — |
| ⅜" | 10 | 6.5 | 17.5 | 4.8 | 6.4 | — |
| ½" | 15 | 9.5 | 22.5 | 6.4 | 7.9 | 11.2 |
| ¾" | 20 | 9.5 | 24 | 6.4 | 7.9 | 12.7 |
| 1" | 25 | 12.5 | 28.5 | 9.6 | 11.2 | 14.2 |
| 1¼" | 32 | 12.5 | 30 | 9.6 | 11.2 | 14.2 |
| 1½" | 40 | 12.5 | 32 | 11.2 | 12.7 | 15.7 |
| 2" | 50 | 19.0 | 41 | 12.7 | 15.7 | 19.0 |
| 2½" | 65 | 19.0 | 43 | 15.7 | 19.0 | — |
| 3" | 80 | 19.0 | 44.5 | 19.0 | 22.4 | — |
| 4" | 100 | 19.0 | 48 | 22.4 | 28.4 | — |
Fitting class and matching pipe schedule
| Type | Class | Pipe schedule |
|---|---|---|
| Threaded | 2000 | Sch 80 (XS) |
| Threaded | 3000 | Sch 160 |
| Threaded | 6000 | XXS |
| Socket-welding | 3000 | Sch 80 (XS) |
| Socket-welding | 6000 | Sch 160 |
| Socket-welding | 9000 | XXS |
Notes
- Dimensions are in millimetres unless stated otherwise.
- Socket bore B and fitting bore D are shown as the mid-point of the maximum and minimum limits in the standard.
- A dash means the standard does not list that size in that class.
- A gap of approximately 1.6 mm is left between the pipe end and the bottom of the socket before welding.
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
FAQ
ASME B16.11 socket weld fitting dimensions: common questions
Which schedule of pipe is used with Class 3000 socket weld fittings?
Schedule 80 (XS). Class 6000 socket weld fittings match Schedule 160 pipe and Class 9000 match XXS.
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