# Tri-clamp vessels with a dished or round welded bottom: 4, 6 and 8 in, 12 to 24 in deep

> What does a 6 inch × 18 inch tri-clamp vessel with a rounded bottom look like?

- Category: Hardware › Sanitary clamp fittings
- Kind: Hardware
- 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
- Page: https://xemstudio.com/objects/tri-clamp-dished-bottom-vessels/ · JSON: https://xemstudio.com/api/geometry?object=tri-clamp-dished-bottom-vessels · Plain text: https://xemstudio.com/objects/tri-clamp-dished-bottom-vessels/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- 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

- 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.

## Sizes

| size_in | tube_od_mm | wall_mm | dished_bottom_h_mm | round_bottom_h_mm | depths_in |
|---|---|---|---|---|---|
| 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 |

## Where the files are

- ASME: [Flanged and dished (F&D) heads: crown radius = OD, knuckle radius 6 % of OD (BPVC Section VIII torispherical head)](https://www.asme.org/codes-standards/find-codes-standards/bpvc-viii-1-bpvc-section-viii-rules-for-construction-of-pressure-vessels-division-1) — standard — ASME; proportions are facts (verify at link)
- GW Kent: [Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness](https://www.gwkent.com/triclamp-guide) — web — publisher's guide; dimensions cited
- Rubber Fab: [Tri-clamp dimensions chart (ID, OD, bead per clamp size, ½ to 12 in and DIN 32676)](https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf) — PDF — publisher's chart; dimensions cited, nothing copied
- 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)](https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf) — PDF — maker chart; dimensions are facts (verify at link)

## Free STEP/STL (18 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/index.json

- vessel-4in-x-12in-dished: [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) — 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
- vessel-4in-x-12in-round: [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) — 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
- vessel-4in-x-18in-dished: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-18in-dished.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-18in-dished.stl) — 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
- vessel-4in-x-18in-round: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-18in-round.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-18in-round.stl) — 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
- vessel-4in-x-24in-dished: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-24in-dished.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-24in-dished.stl) — 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
- vessel-4in-x-24in-round: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-24in-round.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-4in-x-24in-round.stl) — 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
- vessel-6in-x-12in-dished: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-12in-dished.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-12in-dished.stl) — 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
- vessel-6in-x-12in-round: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-12in-round.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-12in-round.stl) — 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
- vessel-6in-x-18in-dished: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-18in-dished.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-18in-dished.stl) — 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
- vessel-6in-x-18in-round: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-18in-round.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-18in-round.stl) — 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
- vessel-6in-x-24in-dished: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-24in-dished.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-24in-dished.stl) — 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
- vessel-6in-x-24in-round: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-24in-round.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-6in-x-24in-round.stl) — 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
- vessel-8in-x-12in-dished: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-12in-dished.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-12in-dished.stl) — 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
- vessel-8in-x-12in-round: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-12in-round.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-12in-round.stl) — 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
- vessel-8in-x-18in-dished: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-18in-dished.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-18in-dished.stl) — 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
- vessel-8in-x-18in-round: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-18in-round.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-18in-round.stl) — 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
- vessel-8in-x-24in-dished: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-24in-dished.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-24in-dished.stl) — 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
- vessel-8in-x-24in-round: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-24in-round.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dished-bottom-vessels/vessel-8in-x-24in-round.stl) — 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

## Questions

**How deep is the dished bottom on a 6 in vessel?**

25.8 mm from the tangent line; the round bottom is 76.2 mm.

**What closes the top?**

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.

## Fits with

- [Tri-clamp dome lids: 1½ to 12 in, plain or with a port at the crown](https://xemstudio.com/objects/tri-clamp-dome-lids/)
- [Tri-clamp end caps with ports: NPT, clamp nozzle, hose barb and airlock hole, 1½ to 8 in](https://xemstudio.com/objects/tri-clamp-ported-end-caps/)
- [Tri-clamp thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top](https://xemstudio.com/objects/tri-clamp-thermowells/)
- [Two-bolt clamps for 6 and 8 in tri-clamp joints](https://xemstudio.com/objects/sanitary-clamp-clamps-6-8in/)
- [Sanitary clamp gaskets, 6 and 8 in (Type B profile)](https://xemstudio.com/objects/sanitary-clamp-gaskets-6-8in/)