{
 "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-dished-bottom-vessels",
 "name": "Tri-clamp vessels with a dished or round welded bottom: 4, 6 and 8 in, 12 to 24 in deep",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Sanitary clamp fittings",
 "year": null,
 "question": "What does a 6 inch × 18 inch tri-clamp vessel with a rounded bottom look like?",
 "tags": [
  "vessel",
  "pot",
  "fermenter",
  "closed end",
  "dished head",
  "brew pot",
  "sanitary",
  "tri-clamp",
  "clamp fitting",
  "brewing",
  "homebrew"
 ],
 "aliases": [
  "6 inch tri clamp fermenter",
  "tri clamp pot",
  "6 x 18 tri clamp vessel",
  "tri clamp closed end spool rounded bottom",
  "sanitary vessel dished bottom",
  "tri clamp brew kettle"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 18,
 "url": "https://xemstudio.com/objects/tri-clamp-dished-bottom-vessels/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-dished-bottom-vessels/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design: sanitary tube (4 in 4.000 × 0.083, 6 in 6.000 × 0.109, 8 in 8.000 × 0.109) with a clamp face on top and a welded head on the bottom: flanged-and-dished (crown radius = OD, knuckle 6 % of OD) or hemispherical",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "A closed pot made from sanitary tube: welded bottom, clamp face on top, so any cap, dome lid, thermowell cap or ported cap of the same size closes it. The 6 in × 18 in is a small fermenter or brew pot; depth is measured from the clamp face to the outside of the bottom.",
   "Dished (F&D) bottoms are shallow and stand on a ring; round bottoms are deeper and drain to one point.",
   "Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40."
  ],
  "table": {
   "columns": [
    "size_in",
    "tube_od_mm",
    "wall_mm",
    "dished_bottom_h_mm",
    "round_bottom_h_mm",
    "depths_in"
   ],
   "rows": [
    [
     "4",
     101.6,
     2.11,
     17.2,
     50.8,
     "12, 18, 24"
    ],
    [
     "6",
     152.4,
     2.77,
     25.8,
     76.2,
     "12, 18, 24"
    ],
    [
     "8",
     203.2,
     2.77,
     34.4,
     101.6,
     "12, 18, 24"
    ]
   ]
  }
 },
 "sheet_text": "Tri-clamp vessels with a dished or round welded bottom: 4, 6 and 8 in, 12 to 24 in deep — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-dished-bottom-vessels/  (CC BY 4.0)\nBasis: Xem Studio design: sanitary tube (4 in 4.000 × 0.083, 6 in 6.000 × 0.109, 8 in 8.000 × 0.109) with a clamp face on top and a welded head on the bottom: flanged-and-dished (crown radius = OD, knuckle 6 % of OD) or hemispherical\nCatalog version: 2026-10-20\n\nSizes: see table below\n- A closed pot made from sanitary tube: welded bottom, clamp face on top, so any cap, dome lid, thermowell cap or ported cap of the same size closes it. The 6 in × 18 in is a small fermenter or brew pot; depth is measured from the clamp face to the outside of the bottom.\n- Dished (F&D) bottoms are shallow and stand on a ring; round bottoms are deeper and drain to one point.\n- Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40.\n\nsize_in  tube_od_mm  wall_mm  dished_bottom_h_mm  round_bottom_h_mm  depths_in\n4  101.6  2.11  17.2  50.8  12, 18, 24\n6  152.4  2.77  25.8  76.2  12, 18, 24\n8  203.2  2.77  34.4  101.6  12, 18, 24\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ASME: Flanged and dished (F&D) heads: crown radius = OD, knuckle radius 6 % of OD (BPVC Section VIII torispherical head) — standard — ASME; proportions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/bpvc-viii-1-bpvc-section-viii-rules-for-construction-of-pressure-vessels-division-1\n- GW Kent: Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness — web — publisher's guide; dimensions cited — https://www.gwkent.com/triclamp-guide\n- Rubber Fab: Tri-clamp dimensions chart (ID, OD, bead per clamp size, ½ to 12 in and DIN 32676) — PDF — publisher's chart; dimensions cited, nothing copied — https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf\n- Rubber Fab: Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50) — PDF — maker chart; dimensions are facts [verify license at link] — https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 18 parts): https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-dished-bottom-vessels\n",
 "sources": [
  {
   "publisher": "ASME",
   "title": "Flanged and dished (F&D) heads: crown radius = OD, knuckle radius 6 % of OD (BPVC Section VIII torispherical head)",
   "url": "https://www.asme.org/codes-standards/find-codes-standards/bpvc-viii-1-bpvc-section-viii-rules-for-construction-of-pressure-vessels-division-1",
   "formats": [
    "standard"
   ],
   "license": "ASME; proportions are facts",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "GW Kent",
   "title": "Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness",
   "url": "https://www.gwkent.com/triclamp-guide",
   "formats": [
    "web"
   ],
   "license": "publisher's guide; dimensions cited",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rubber Fab",
   "title": "Tri-clamp dimensions chart (ID, OD, bead per clamp size, ½ to 12 in and DIN 32676)",
   "url": "https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf",
   "formats": [
    "PDF"
   ],
   "license": "publisher's chart; dimensions cited, nothing copied",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rubber Fab",
   "title": "Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50)",
   "url": "https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf",
   "formats": [
    "PDF"
   ],
   "license": "maker chart; dimensions are facts",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tri-clamp-dome-lids",
  "tri-clamp-ported-end-caps",
  "tri-clamp-thermowells",
  "sanitary-clamp-clamps-6-8in",
  "sanitary-clamp-gaskets-6-8in"
 ],
 "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": "How deep is the dished bottom on a 6 in vessel?",
   "a": "25.8 mm from the tangent line; the round bottom is 76.2 mm."
  },
  {
   "q": "What closes the top?",
   "a": "Any 6 in tri-clamp cap or lid with a 6 in clamp and gasket: a flat cap, a dome lid, or a ported cap for a thermowell, airlock or hose barb."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "vessel-4in-x-12in-dished",
   "formats": [
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    "stl"
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-12in-dished.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-12in-dished.stl",
   "note": "4 in tri-clamp vessel, 12 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 17.2 high; tube 101.6 × 2.11; holds about 2.14 L in the straight part"
  },
  {
   "file": "vessel-4in-x-12in-round",
   "formats": [
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   ],
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   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-12in-round.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-12in-round.stl",
   "note": "4 in tri-clamp vessel, 12 in deep (face to the outside of the bottom), round (hemispherical) bottom 50.8 high; tube 101.6 × 2.11; holds about 1.89 L in the straight part"
  },
  {
   "file": "vessel-4in-x-18in-dished",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-18in-dished.stl",
   "note": "4 in tri-clamp vessel, 18 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 17.2 high; tube 101.6 × 2.11; holds about 3.28 L in the straight part"
  },
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-18in-round.stl",
   "note": "4 in tri-clamp vessel, 18 in deep (face to the outside of the bottom), round (hemispherical) bottom 50.8 high; tube 101.6 × 2.11; holds about 3.03 L in the straight part"
  },
  {
   "file": "vessel-4in-x-24in-dished",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-24in-dished.stl",
   "note": "4 in tri-clamp vessel, 24 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 17.2 high; tube 101.6 × 2.11; holds about 4.41 L in the straight part"
  },
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-24in-round.stl",
   "note": "4 in tri-clamp vessel, 24 in deep (face to the outside of the bottom), round (hemispherical) bottom 50.8 high; tube 101.6 × 2.11; holds about 4.16 L in the straight part"
  },
  {
   "file": "vessel-6in-x-12in-dished",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-12in-dished.stl",
   "note": "6 in tri-clamp vessel, 12 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 25.8 high; tube 152.4 × 2.77; holds about 4.73 L in the straight part"
  },
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-12in-round.stl",
   "note": "6 in tri-clamp vessel, 12 in deep (face to the outside of the bottom), round (hemispherical) bottom 76.2 high; tube 152.4 × 2.77; holds about 3.87 L in the straight part"
  },
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-18in-dished.stl",
   "note": "6 in tri-clamp vessel, 18 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 25.8 high; tube 152.4 × 2.77; holds about 7.31 L in the straight part"
  },
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-18in-round.stl",
   "note": "6 in tri-clamp vessel, 18 in deep (face to the outside of the bottom), round (hemispherical) bottom 76.2 high; tube 152.4 × 2.77; holds about 6.45 L in the straight part"
  },
  {
   "file": "vessel-6in-x-24in-dished",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-24in-dished.stl",
   "note": "6 in tri-clamp vessel, 24 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 25.8 high; tube 152.4 × 2.77; holds about 9.89 L in the straight part"
  },
  {
   "file": "vessel-6in-x-24in-round",
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   ],
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-24in-round.stl",
   "note": "6 in tri-clamp vessel, 24 in deep (face to the outside of the bottom), round (hemispherical) bottom 76.2 high; tube 152.4 × 2.77; holds about 9.04 L in the straight part"
  },
  {
   "file": "vessel-8in-x-12in-dished",
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   ],
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-12in-dished.stl",
   "note": "8 in tri-clamp vessel, 12 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 34.4 high; tube 203.2 × 2.77; holds about 8.30 L in the straight part"
  },
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-12in-round.stl",
   "note": "8 in tri-clamp vessel, 12 in deep (face to the outside of the bottom), round (hemispherical) bottom 101.6 high; tube 203.2 × 2.77; holds about 6.24 L in the straight part"
  },
  {
   "file": "vessel-8in-x-18in-dished",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-18in-dished.stl",
   "note": "8 in tri-clamp vessel, 18 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 34.4 high; tube 203.2 × 2.77; holds about 12.97 L in the straight part"
  },
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-18in-round.stl",
   "note": "8 in tri-clamp vessel, 18 in deep (face to the outside of the bottom), round (hemispherical) bottom 101.6 high; tube 203.2 × 2.77; holds about 10.91 L in the straight part"
  },
  {
   "file": "vessel-8in-x-24in-dished",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-24in-dished.stl",
   "note": "8 in tri-clamp vessel, 24 in deep (face to the outside of the bottom), F&D dished bottom (crown R = OD, knuckle 6 %) 34.4 high; tube 203.2 × 2.77; holds about 17.65 L in the straight part"
  },
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-24in-round.stl",
   "note": "8 in tri-clamp vessel, 24 in deep (face to the outside of the bottom), round (hemispherical) bottom 101.6 high; tube 203.2 × 2.77; holds about 15.59 L in the straight part"
  }
 ],
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}