# Butt-weld equal tees (ASME B16.9), NPS ½ to 12 > What is the centre-to-end of a butt-weld straight tee (ASME B16.9)? - Category: Tri-clamp & pipe › Pipe, tube & threads - Kind: Standard part - Basis: ASME B16.9 dimensions as published in SHIELD's manufacturer table (mm); OD and Sch 40 wall per ASME B36.10 (Weldbend) - Page: https://xemstudio.com/objects/butt-weld-equal-tees/ · JSON: https://xemstudio.com/api/geometry?object=butt-weld-equal-tees · Plain text: https://xemstudio.com/objects/butt-weld-equal-tees/sheet.txt - License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license - Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/) **Exact dimensions.** True size, with no printing tolerance added. ## Notes - An equal (straight) tee has the run and the branch the same size. C is centre to the run ends, M centre to the outlet end; for equal tees they are the same. - Files at NPS 1, 2 and 4, Schedule 40 hollow. The crotch blend radius is not published, so the run and branch meet sharp. - OD and Schedule 40 wall: Weldbend prints OD rounded (1.32, 2.38 in); the files use the exact ASME B36.10 OD (1.315, 2.375, 4.500 in) with the Weldbend Sch 40 wall (.133, .154, .237 in). Fittings are made to match the pipe's OD and wall. - Ends are drawn square. Real fittings are bevelled for welding to ASME B16.25; no public, citable statement of the bevel was found, so it is not drawn. ## Sizes | NPS | OD, mm | Sch 40 wall | centre-to-end run C, mm | centre-to-end outlet M, mm | run end-to-end 2C, mm | |---|---|---|---|---|---| | 1/2 | 21.3 | 0.109 in (2.77 mm) | 25 | 25 | 50 | | 3/4 | 26.7 | 0.113 in (2.87 mm) | 29 | 29 | 58 | | 1 | 33.4 | 0.133 in (3.38 mm) | 38 | 38 | 76 | | 1-1/4 | 42.2 | 0.140 in (3.56 mm) | 48 | 48 | 96 | | 1-1/2 | 48.3 | 0.145 in (3.68 mm) | 57 | 57 | 114 | | 2 | 60.3 | 0.154 in (3.91 mm) | 64 | 64 | 128 | | 2-1/2 | 73.0 | 0.203 in (5.16 mm) | 76 | 76 | 152 | | 3 | 88.9 | 0.216 in (5.49 mm) | 86 | 86 | 172 | | 3-1/2 | 101.6 | 0.226 in (5.74 mm) | 95 | 95 | 190 | | 4 | 114.3 | 0.237 in (6.02 mm) | 105 | 105 | 210 | | 5 | 141.3 | 0.258 in (6.55 mm) | 124 | 124 | 248 | | 6 | 168.3 | 0.280 in (7.11 mm) | 143 | 143 | 286 | | 8 | 219.1 | 0.322 in (8.18 mm) | 178 | 178 | 356 | | 10 | 273.0 | 0.365 in (9.27 mm) | 216 | 216 | 432 | | 12 | 323.8 | 0.406 in (10.31 mm) | 254 | 254 | 508 | ## Where the files are - SHIELD (manufacturer): [Butt-welded fittings & flanges, SG-BWFF: ASME B16.9 elbows, tees, reducers (mm)](https://www.naffco.com/media-downloads/pdf/buttwelded.pdf) — web — Publisher's page; dimensions are facts - Weldbend Corporation: [Weld fitting & weld flange catalog, 63rd edition: 90° and 45° long-radius elbows, OD, STD / Sch 40 wall](https://acceldx.roccommercecloud.com/assets/86/84/86841a47-ae63-4c4d-9881-ceba74db0969/Weldbend_131010000_Catalog.pdf) — web — Publisher's page; dimensions are facts ## Free STEP/STL (3 parts, CC BY 4.0, Xem Studio) Index: https://xemstudio.com/files/hardware/butt-weld-equal-tees/index.json - bw-tee-equal-nps1-sch40: [STEP](https://xemstudio.com/files/hardware/butt-weld-equal-tees/bw-tee-equal-nps1-sch40.step) · [STL](https://xemstudio.com/files/hardware/butt-weld-equal-tees/bw-tee-equal-nps1-sch40.stl) — NPS 1 equal tee, Sch 40: OD 33.40, ID 26.64, centre-to-end run and outlet 38 mm; sharp crotch, square ends - bw-tee-equal-nps2-sch40: [STEP](https://xemstudio.com/files/hardware/butt-weld-equal-tees/bw-tee-equal-nps2-sch40.step) · [STL](https://xemstudio.com/files/hardware/butt-weld-equal-tees/bw-tee-equal-nps2-sch40.stl) — NPS 2 equal tee, Sch 40: OD 60.32, ID 52.50, centre-to-end run and outlet 64 mm; sharp crotch, square ends - bw-tee-equal-nps4-sch40: [STEP](https://xemstudio.com/files/hardware/butt-weld-equal-tees/bw-tee-equal-nps4-sch40.step) · [STL](https://xemstudio.com/files/hardware/butt-weld-equal-tees/bw-tee-equal-nps4-sch40.stl) — NPS 4 equal tee, Sch 40: OD 114.30, ID 102.26, centre-to-end run and outlet 105 mm; sharp crotch, square ends ## Questions **What is the centre-to-end of a 2 in butt-weld tee?** 64 mm (run and outlet), so 128 mm end to end along the run. **What is the centre-to-end of a 4 in butt-weld tee?** 105 mm (run and outlet). ## Fits with - [Butt-weld elbows, 90° and 45° long radius (ASME B16.9), NPS ½ to 12](https://xemstudio.com/objects/butt-weld-elbows-long-radius/) - [Butt-weld reducers, concentric and eccentric (ASME B16.9), NPS ¾ to 12](https://xemstudio.com/objects/butt-weld-reducers/) - [Schedule 40 pipe and PVC fittings, 1/2 to 2 inch](https://xemstudio.com/objects/schedule-40-pipe/) - [Sanitary clamp tees and short-outlet tees (7MP, 7MPS): ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-tees/)