{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "butt-weld-equal-tees",
 "name": "Butt-weld equal tees (ASME B16.9), NPS ½ to 12",
 "kind": "standard",
 "category": "Tri-clamp & pipe",
 "group": "Pipe, tube & threads",
 "year": null,
 "question": "What is the centre-to-end of a butt-weld straight tee (ASME B16.9)?",
 "tags": [
  "pipe",
  "pipe fitting",
  "butt weld",
  "tee",
  "b16.9",
  "standard"
 ],
 "aliases": [
  "butt weld tee dimensions",
  "straight tee center to end",
  "b16.9 tee",
  "equal tee dimensions",
  "weld tee step",
  "schedule 40 tee"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 3,
 "url": "https://xemstudio.com/objects/butt-weld-equal-tees/",
 "sheet_txt": "https://xemstudio.com/objects/butt-weld-equal-tees/sheet.txt",
 "sheet": {
  "basis": "ASME B16.9 dimensions as published in SHIELD's manufacturer table (mm); OD and Sch 40 wall per ASME B36.10 (Weldbend)",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "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."
  ],
  "table": {
   "columns": [
    "NPS",
    "OD, mm",
    "Sch 40 wall",
    "centre-to-end run C, mm",
    "centre-to-end outlet M, mm",
    "run end-to-end 2C, mm"
   ],
   "rows": [
    [
     "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"
    ]
   ]
  }
 },
 "sheet_text": "Butt-weld equal tees (ASME B16.9), NPS ½ to 12 — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/butt-weld-equal-tees/  (sheet CC BY 4.0)\nBasis: ASME B16.9 dimensions as published in SHIELD's manufacturer table (mm); OD and Sch 40 wall per ASME B36.10 (Weldbend)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- 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.\n- Files at NPS 1, 2 and 4, Schedule 40 hollow. The crotch blend radius is not published, so the run and branch meet sharp.\n- 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.\n- 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.\n\nNPS  OD, mm  Sch 40 wall  centre-to-end run C, mm  centre-to-end outlet M, mm  run end-to-end 2C, mm\n1/2  21.3  0.109 in (2.77 mm)  25  25  50\n3/4  26.7  0.113 in (2.87 mm)  29  29  58\n1  33.4  0.133 in (3.38 mm)  38  38  76\n1-1/4  42.2  0.140 in (3.56 mm)  48  48  96\n1-1/2  48.3  0.145 in (3.68 mm)  57  57  114\n2  60.3  0.154 in (3.91 mm)  64  64  128\n2-1/2  73.0  0.203 in (5.16 mm)  76  76  152\n3  88.9  0.216 in (5.49 mm)  86  86  172\n3-1/2  101.6  0.226 in (5.74 mm)  95  95  190\n4  114.3  0.237 in (6.02 mm)  105  105  210\n5  141.3  0.258 in (6.55 mm)  124  124  248\n6  168.3  0.280 in (7.11 mm)  143  143  286\n8  219.1  0.322 in (8.18 mm)  178  178  356\n10  273.0  0.365 in (9.27 mm)  216  216  432\n12  323.8  0.406 in (10.31 mm)  254  254  508\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- SHIELD (manufacturer): Butt-welded fittings & flanges, SG-BWFF: ASME B16.9 elbows, tees, reducers (mm) — web — Publisher's page; dimensions are facts — https://www.naffco.com/media-downloads/pdf/buttwelded.pdf\n- Weldbend Corporation: Weld fitting & weld flange catalog, 63rd edition: 90° and 45° long-radius elbows, OD, STD / Sch 40 wall — web — Publisher's page; dimensions are facts — https://acceldx.roccommercecloud.com/assets/86/84/86841a47-ae63-4c4d-9881-ceba74db0969/Weldbend_131010000_Catalog.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/butt-weld-equal-tees/index.json\nAPI: https://xemstudio.com/api/geometry?object=butt-weld-equal-tees\n",
 "sources": [
  {
   "publisher": "SHIELD (manufacturer)",
   "title": "Butt-welded fittings & flanges, SG-BWFF: ASME B16.9 elbows, tees, reducers (mm)",
   "url": "https://www.naffco.com/media-downloads/pdf/buttwelded.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Weldbend Corporation",
   "title": "Weld fitting & weld flange catalog, 63rd edition: 90° and 45° long-radius elbows, OD, STD / Sch 40 wall",
   "url": "https://acceldx.roccommercecloud.com/assets/86/84/86841a47-ae63-4c4d-9881-ceba74db0969/Weldbend_131010000_Catalog.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "butt-weld-elbows-long-radius",
  "butt-weld-reducers",
  "schedule-40-pipe",
  "sanitary-clamp-tees"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "What is the centre-to-end of a 2 in butt-weld tee?",
   "a": "64 mm (run and outlet), so 128 mm end to end along the run."
  },
  {
   "q": "What is the centre-to-end of a 4 in butt-weld tee?",
   "a": "105 mm (run and outlet)."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "bw-tee-equal-nps1-sch40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "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",
   "note": "NPS 1 equal tee, Sch 40: OD 33.40, ID 26.64, centre-to-end run and outlet 38 mm; sharp crotch, square ends"
  },
  {
   "file": "bw-tee-equal-nps2-sch40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "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",
   "note": "NPS 2 equal tee, Sch 40: OD 60.32, ID 52.50, centre-to-end run and outlet 64 mm; sharp crotch, square ends"
  },
  {
   "file": "bw-tee-equal-nps4-sch40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "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",
   "note": "NPS 4 equal tee, Sch 40: OD 114.30, ID 102.26, centre-to-end run and outlet 105 mm; sharp crotch, square ends"
  }
 ],
 "markdown": "https://xemstudio.com/objects/butt-weld-equal-tees/index.md"
}