Butt-Weld Fittings — Companion Article
Open the tool: https://pipingdesigners.com/tools-training/bw-fittings/
What this tool does
Butt-Weld Fittings is a lookup for the main dimensions of elbows, returns, tees, reducers, caps and long-pattern lap-joint stub ends.
When to use it
Use it to get a centre-to-end or end-to-end for layout, take-outs and cut lengths.
Inputs
- Fitting type: long-radius 90 and 45 elbows, short-radius 90 elbows, long- and short-radius 180 returns, straight and reducing tees, concentric and eccentric reducers, caps, or long-pattern stub ends.
- Size, and outlet size for reducing items.
- Schedule, for stub ends.
- Units: inches or millimetres.
How it works
The page reads bundled manufacturer charts. Millimetres are inch figures × 25.4. Elbows, tees, reducers and caps come from the Tube Forgings of America 2009 catalog. Stub ends come from the Texas Flange chart, and a second catalog prints the same figures.
Understanding the result
Each dimension shows as a card with the source chart named.
Engineering considerations
- Wall thickness and weight are not stored. Use your pipe schedule data for those.
- Check the take-out against the fitting you actually buy.
Example
8 inch long-radius 90 elbow: centre to end 12.00 in. NPS 2 Schedule 40 long-pattern stub end: overall length 6.00 in.
Standards/references (licensed vs interim)
Licence status is interim. The numbers come from manufacturer catalogs, not from licensed ASME B16.9 text. The page builds its source note from the dataset and names the standard to verify against. Always check the current edition of ASME B16.9, or the manufacturer’s certified drawing, before you use a figure on a deliverable.
Limitations/disclaimer
- No short-radius 45s, 3R elbows, reducing elbows or short-pattern stub ends.
- The result is preliminary and needs engineering review.
Use the tool
Calculate now: Butt-Weld Fittings
Related tools
- Cut Length (new tool, being added to the site).
- Pipe Offset (new tool, being added to the site).
- Branch Reinforcement (new tool, being added to the site).