ASME B16.9 Pipe Fitting Dimensions Chart
Butt-Welding Fitting Dimensions — Elbows, Tees, Reducers, Caps & Stub Ends
About
ASME B16.9 covers the overall dimensions, tolerances, ratings, testing, and marking of wrought steel butt-welding fittings. The tables below contain data from Tables 6.1-1 through 6.1-11 of ASME B16.9-2018, covering 11 fitting types from NPS 1/2 through NPS 48.
Select a fitting type from the dropdown to view its dimensions. Reducing fittings show both the large and small NPS values.
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Fitting Dimensions Table
Use the fitting type dropdown to switch between elbow, tee, reducer, cap, and stub end dimensions. Toggle between imperial and metric units.
| NPS | OD at Bevel (in) | Center-to-End 90°, A (in) | Center-to-End 45°, B (in) |
|---|---|---|---|
| undefined | 0.84 | 1.5 | 0.62 |
| undefined | 1.05 | 1.5 | 0.75 |
| undefined | 1.32 | 1.5 | 0.88 |
| undefined | 1.66 | 1.88 | 1 |
| undefined | 1.9 | 2.25 | 1.12 |
| undefined | 2.38 | 3 | 1.38 |
| undefined | 2.88 | 3.75 | 1.75 |
| undefined | 3.5 | 4.5 | 2 |
| undefined | 4 | 5.25 | 2.25 |
| undefined | 4.5 | 6 | 2.5 |
| undefined | 5.56 | 7.5 | 3.12 |
| undefined | 6.62 | 9 | 3.75 |
| undefined | 8.62 | 12 | 5 |
| undefined | 10.75 | 15 | 6.25 |
| undefined | 12.75 | 18 | 7.5 |
| undefined | 14 | 21 | 8.75 |
| undefined | 16 | 24 | 10 |
| undefined | 18 | 27 | 11.25 |
| undefined | 20 | 30 | 12.5 |
| undefined | 22 | 33 | 13.5 |
| undefined | 24 | 36 | 15 |
| undefined | 26 | 39 | 16 |
| undefined | 28 | 42 | 17.25 |
| undefined | 30 | 45 | 18.5 |
| undefined | 32 | 48 | 19.75 |
| undefined | 34 | 51 | 21 |
| undefined | 36 | 54 | 22.25 |
| undefined | 38 | 57 | 23.62 |
| undefined | 40 | 60 | 24.88 |
| undefined | 42 | 63 | 26 |
| undefined | 44 | 66 | 27.38 |
| undefined | 46 | 69 | 28.62 |
| undefined | 48 | 72 | 29.88 |
Data sourced from ASME B16.9-2018, Tables 6.1-1 through 6.1-11.
How to Use This Chart
Select a fitting type to view its dimensions. The available columns change based on the fitting type selected:
- Elbows — center-to-end (A) for 90° and 45°, OD at bevel
- Tees & Crosses — center-to-end for run (C) and outlet (M), OD at bevel
- Reducers — OD at bevel for large and small ends, end-to-end length
- Caps — OD at barrel, length (E)
- Stub Ends — barrel OD (max/min), long and short pattern lengths, lap diameter