{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "tri-clamp-ferrule",
 "name": "Tri-clamp (Tri-Clover) sanitary ferrule, 1/2 to 4 inch",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Tri-clamp",
 "year": null,
 "question": "What are tri-clamp ferrule dimensions: flange OD, tube OD and which sizes share a clamp?",
 "tags": [
  "tri-clamp",
  "sanitary",
  "ferrule",
  "fitting",
  "stirling",
  "brewing"
 ],
 "aliases": [
  "tri clamp",
  "tri-clover",
  "triclamp",
  "tc ferrule",
  "sanitary ferrule",
  "iso 2852",
  "din 32676"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 8,
 "url": "https://xemstudio.com/objects/tri-clamp-ferrule/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-ferrule/sheet.txt",
 "sheet": {
  "basis": "ISO 2852:1974 face profile (rim 2.85, recess 1.6, 20° back angle, groove diameters) with ASME BPE tube sizes; 16 ga wall",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Clamp size follows the flange OD, not the tube: 1/2 and 3/4 in share a 25.4 mm flange; 1 and 1.5 in share 50.5 mm; 2 in is 64.0; 2.5 in 77.5; 3 in 91.0; 4 in 119.0 mm.",
   "Face (ISO 2852 §6.1): a flat sealing land from the groove diameter C2 out to the rim, and a recess 1.6 mm deep (K) from C2 in to the bore, where the gasket bead sits. C2 = 43.5 mm for the 50.5 flange, 56.5 for 64.0, 83.5 for 91.0. Radii R2 2.0 / R3 1.2 mm.",
   "Rim thickness L1 = 2.85 mm; the back of the flange is a 20° cone (α) rising to the hub, which is what the clamp's V-ring grips. Hub thickness works out to about 5.3 mm on a 2 in weld ferrule.",
   "Weld ferrules: 21.5 mm (ISO/short) or 28.6 mm (ASME BPE medium); 44.5 / 57.2 mm long versions exist. Tube end plain for a butt weld.",
   "Printing it: this profile prints true in PLA/PETG for mock-ups and clamp fit checks; the sealing land needs a smooth top layer. Real parts are 304/316 stainless.",
   "Why it matters here: a thermoacoustic/Stirling engine body built from 2 in tri-clamp parts is a stack of ferrules, spools and caps; print the stack first, then buy steel."
  ],
  "table": {
   "columns": [
    "nominal_in",
    "tube_od_mm",
    "tube_od_in",
    "wall_mm",
    "flange_od_mm",
    "groove_dia_mm",
    "clamp_size"
   ],
   "rows": [
    [
     "1/2",
     12.7,
     0.5,
     1.65,
     25.4,
     "n/a in ISO sample",
     "1/2–3/4"
    ],
    [
     "3/4",
     19.05,
     0.75,
     1.65,
     25.4,
     "n/a in ISO sample",
     "1/2–3/4"
    ],
    [
     "1",
     25.4,
     1,
     1.65,
     50.5,
     43.5,
     "1–1.5"
    ],
    [
     "1-1/2",
     38.1,
     1.5,
     1.65,
     50.5,
     43.5,
     "1–1.5"
    ],
    [
     "2",
     50.8,
     2,
     1.65,
     64,
     56.5,
     "2"
    ],
    [
     "2-1/2",
     63.5,
     2.5,
     1.65,
     77.5,
     "n/a in ISO sample",
     "2.5"
    ],
    [
     "3",
     76.2,
     3,
     1.65,
     91,
     83.5,
     "3"
    ],
    [
     "4",
     101.6,
     4,
     2.11,
     119,
     "n/a in ISO sample",
     "4"
    ]
   ]
  }
 },
 "sheet_text": "Tri-clamp (Tri-Clover) sanitary ferrule, 1/2 to 4 inch — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-ferrule/  (CC BY 4.0)\nBasis: ISO 2852:1974 face profile (rim 2.85, recess 1.6, 20° back angle, groove diameters) with ASME BPE tube sizes; 16 ga wall\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Clamp size follows the flange OD, not the tube: 1/2 and 3/4 in share a 25.4 mm flange; 1 and 1.5 in share 50.5 mm; 2 in is 64.0; 2.5 in 77.5; 3 in 91.0; 4 in 119.0 mm.\n- Face (ISO 2852 §6.1): a flat sealing land from the groove diameter C2 out to the rim, and a recess 1.6 mm deep (K) from C2 in to the bore, where the gasket bead sits. C2 = 43.5 mm for the 50.5 flange, 56.5 for 64.0, 83.5 for 91.0. Radii R2 2.0 / R3 1.2 mm.\n- Rim thickness L1 = 2.85 mm; the back of the flange is a 20° cone (α) rising to the hub, which is what the clamp's V-ring grips. Hub thickness works out to about 5.3 mm on a 2 in weld ferrule.\n- Weld ferrules: 21.5 mm (ISO/short) or 28.6 mm (ASME BPE medium); 44.5 / 57.2 mm long versions exist. Tube end plain for a butt weld.\n- Printing it: this profile prints true in PLA/PETG for mock-ups and clamp fit checks; the sealing land needs a smooth top layer. Real parts are 304/316 stainless.\n- Why it matters here: a thermoacoustic/Stirling engine body built from 2 in tri-clamp parts is a stack of ferrules, spools and caps; print the stack first, then buy steel.\n\nnominal_in  tube_od_mm  tube_od_in  wall_mm  flange_od_mm  groove_dia_mm  clamp_size\n1/2  12.7  0.5  1.65  25.4  n/a in ISO sample  1/2–3/4\n3/4  19.05  0.75  1.65  25.4  n/a in ISO sample  1/2–3/4\n1  25.4  1.0  1.65  50.5  43.5  1–1.5\n1-1/2  38.1  1.5  1.65  50.5  43.5  1–1.5\n2  50.8  2.0  1.65  64.0  56.5  2\n2-1/2  63.5  2.5  1.65  77.5  n/a in ISO sample  2.5\n3  76.2  3.0  1.65  91.0  83.5  3\n4  101.6  4.0  2.11  119.0  n/a in ISO sample  4\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ISO (via iTeh sample): ISO 2852:1974 clamp liners with gaskets (face and gasket profile, §6.1 and §8) — PDF — standard excerpt; dimensions are facts — https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf\n- McMaster-Carr: Sanitary (quick-clamp) tube fittings (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/sanitary-fittings/\n- Dixon Valve: Sanitary fittings catalog (dimensions) — PDF — vendor catalog [verify license at link] — https://www.dixonvalve.com/en/sanitary-fittings\n- Wikipedia: Tri-clamp fitting — web — CC BY-SA 4.0 (text) [verify license at link] — https://en.wikipedia.org/wiki/Tri-clamp\n- Long Earth Society: The engine built from tri-clamp parts — web — CC BY 4.0 (text) — https://longearthsociety.com/engineering/custom-high-temp-stirling/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 8 parts): https://xemstudio.com/files/hardware/tri-clamp-ferrule/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-ferrule\n",
 "sources": [
  {
   "publisher": "ISO (via iTeh sample)",
   "title": "ISO 2852:1974 clamp liners with gaskets (face and gasket profile, §6.1 and §8)",
   "url": "https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf",
   "formats": [
    "PDF"
   ],
   "license": "standard excerpt; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Sanitary (quick-clamp) tube fittings (free STEP per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/sanitary-fittings/",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Dixon Valve",
   "title": "Sanitary fittings catalog (dimensions)",
   "url": "https://www.dixonvalve.com/en/sanitary-fittings",
   "formats": [
    "PDF"
   ],
   "license": "vendor catalog",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Tri-clamp fitting",
   "url": "https://en.wikipedia.org/wiki/Tri-clamp",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "The engine built from tri-clamp parts",
   "url": "https://longearthsociety.com/engineering/custom-high-temp-stirling/",
   "formats": [
    "web"
   ],
   "license": "CC BY 4.0 (text)",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tri-clamp-spool",
  "tri-clamp-end-cap",
  "schedule-40-pipe",
  "o-rings-metric"
 ],
 "faq": [
  {
   "q": "What is the flange OD of a 2 inch tri clamp ferrule?",
   "a": "64.0 mm. 1 in and 1.5 in share a 50.5 mm flange and the same clamp; 2.5 in is 77.5 mm; 3 in is 91.0 mm; 4 in is 119.0 mm."
  },
  {
   "q": "Are 1 inch and 1.5 inch tri clamp fittings interchangeable?",
   "a": "The flanges are the same (50.5 mm OD, 43.5 mm groove) so a 1.5 in clamp and gasket fit both; the tube bores differ (25.4 vs 38.1 mm OD tube)."
  },
  {
   "q": "What are the ISO 2852 tri clamp face dimensions?",
   "a": "Rim thickness 2.85 mm, gasket recess 1.6 mm deep inside the groove diameter (43.5 / 56.5 / 83.5 mm for 50.5 / 64 / 91 flanges), 20° back cone that the clamp grips. The free STEP files here use exactly that profile."
  },
  {
   "q": "Can I 3D print a tri clamp ferrule?",
   "a": "For mock-ups, fit checks and low-pressure air, yes: the STEP/STL here follow the ISO 2852 face so a real clamp and gasket seat on them. Not for pressure, heat or food service; print the stack, then buy stainless."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "tc-ferrule-1in-21.5mm",
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-ferrule/tc-ferrule-1in-21.5mm.stl",
   "note": "1 in weld ferrule, 21.5 mm, 16 ga; ISO 2852 face (2.85 rim, 1.6 recess, 20° back)"
  },
  {
   "file": "tc-ferrule-1in-28.6mm",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-ferrule/tc-ferrule-1in-28.6mm.stl",
   "note": "1 in weld ferrule, 28.6 mm, 16 ga; ISO 2852 face (2.85 rim, 1.6 recess, 20° back)"
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   "note": "1.5 in weld ferrule, 21.5 mm, 16 ga; ISO 2852 face (2.85 rim, 1.6 recess, 20° back)"
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-ferrule/tc-ferrule-1.5in-28.6mm.stl",
   "note": "1.5 in weld ferrule, 28.6 mm, 16 ga; ISO 2852 face (2.85 rim, 1.6 recess, 20° back)"
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   "file": "tc-ferrule-2in-21.5mm",
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   "note": "2 in weld ferrule, 21.5 mm, 16 ga; ISO 2852 face (2.85 rim, 1.6 recess, 20° back)"
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-ferrule/tc-ferrule-2in-28.6mm.stl",
   "note": "2 in weld ferrule, 28.6 mm, 16 ga; ISO 2852 face (2.85 rim, 1.6 recess, 20° back)"
  },
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   "file": "tc-ferrule-3in-21.5mm",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-ferrule/tc-ferrule-3in-21.5mm.stl",
   "note": "3 in weld ferrule, 21.5 mm, 16 ga; ISO 2852 face (2.85 rim, 1.6 recess, 20° back)"
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   "note": "3 in weld ferrule, 28.6 mm, 16 ga; ISO 2852 face (2.85 rim, 1.6 recess, 20° back)"
  }
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 "markdown": "https://xemstudio.com/objects/tri-clamp-ferrule/index.md"
}