# Sanitary clamp gaskets, ISO 2852 Type B: ½ to 4 in

> What are tri-clamp gasket dimensions for each size?

- Category: Hardware › Sanitary clamp fittings
- Kind: Standard part
- Basis: ISO 2852 Type B profile (bead 5.5, web 1.7, lip 1.1 × ±2.8) on each size; OD = flange − 1, lip ID = bore − 2.2
- Page: https://xemstudio.com/objects/sanitary-clamp-gaskets/ · JSON: https://xemstudio.com/api/geometry?object=sanitary-clamp-gaskets · Plain text: https://xemstudio.com/objects/sanitary-clamp-gaskets/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

**Exact dimensions.** Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part.

## Notes

- The Type B gasket for each size: a 5.5 mm bead that fills both face recesses, a 1.7 mm web on the lands, and a 1.1 mm inner lip standing 2.8 mm each side of the centre plane.
- OD = flange − 1 mm; bead out to the groove diameter − 0.4 mm; lip ID = bore − 2.2 mm. Each file is drawn for its tube size (the ½ and ¾ in gaskets differ only in lip ID).
- The 1.5 and 2 in gaskets on the tri-clamp gasket page have the same profile with the bead out to the groove diameter itself.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| clamp faces | ISO 2852 / BPE flange | clamp + Type B gasket | clamp | all |
| gasket bead in the face recess | groove Ø per size | two ferrule faces | designed | gasket-* |

## Sizes

| size_in | od_mm | bead_od_mm | lip_id_mm | bead_mm | web_mm |
|---|---|---|---|---|---|
| ½ | 24.0 | 17.6 | 7.2 | 5.5 | 1.7 |
| ¾ | 24.0 | 17.6 | 13.55 | 5.5 | 1.7 |
| 1 | 49.5 | 43.1 | 19.9 | 5.5 | 1.7 |
| 1½ | 49.5 | 43.1 | 32.6 | 5.5 | 1.7 |
| 2 | 63.0 | 56.1 | 45.3 | 5.5 | 1.7 |
| 2½ | 76.5 | 70.1 | 58.0 | 5.5 | 1.7 |
| 3 | 90.0 | 83.1 | 70.7 | 5.5 | 1.7 |
| 4 | 118.0 | 111.1 | 95.18 | 5.5 | 1.7 |

## Where the files are

- ASME: [BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall)](https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment) — standard — ASME; dimensions are facts (verify at link)
- ISO (via iTeh sample): [ISO 2852 clamp liners: face profile and flange / groove diameters](https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf) — PDF — standard excerpt; dimensions are facts
- Dixon Sanitary: [Clamp elbows, ferrules: dimension sheet](https://dixonvalve.com/en/media/1397776) — PDF — publisher's catalogue; dimensions cited, nothing copied
- Steel & O'Brien: [Sanitary products catalog 2024 (clamp fittings dimension tables)](https://www.steelobrien.com/wp-content/uploads/2024/03/Sanitary-2024-FINAL.pdf) — PDF — publisher's catalogue; dimensions cited, nothing copied

## Free STEP/STL (8 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/sanitary-clamp-gaskets/index.json

- gasket-0.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-0.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-0.5in.stl) — ½ in Type B gasket (ISO 2852 profile)
- gasket-0.75in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-0.75in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-0.75in.stl) — ¾ in Type B gasket (ISO 2852 profile)
- gasket-1in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-1in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-1in.stl) — 1 in Type B gasket (ISO 2852 profile)
- gasket-1.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-1.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-1.5in.stl) — 1½ in Type B gasket (ISO 2852 profile)
- gasket-2in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-2in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-2in.stl) — 2 in Type B gasket (ISO 2852 profile)
- gasket-2.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-2.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-2.5in.stl) — 2½ in Type B gasket (ISO 2852 profile)
- gasket-3in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-3in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-3in.stl) — 3 in Type B gasket (ISO 2852 profile)
- gasket-4in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-4in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/gasket-4in.stl) — 4 in Type B gasket (ISO 2852 profile)

## How it fits

### Goes in or on
- [Sanitary clamp weld ferrules, short and medium: ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-ferrules/): bead in each face recess

### Connects to
- [Tri-clamp clamp, two-bolt: every flange size ½ to 4 in](https://xemstudio.com/objects/tri-clamp-clamps/): squeezed by the clamp

### Alternatives
- [Tri-clamp gasket, ISO 2852 Type B: 1.5 and 2 in](https://xemstudio.com/objects/tri-clamp-gasket/): 1.5 / 2 in gasket used with the engine heads
- [Tri-clamp flat gasket (hot joint, bore ID): 1.7 mm ring, ½ to 4 in](https://xemstudio.com/objects/tri-clamp-hot-gasket/): flat ring for a hot joint

## Questions

**What size is a 2 inch tri-clamp gasket?**

Ø63.0 OD, bead to Ø56.1, lip ID Ø45.3; 5.5 mm bead, 1.7 mm web.

**Are ½ and ¾ inch gaskets the same?**

Same Ø24.0 OD on the 25.0 mini flange; the lip ID differs: Ø7.2 for ½ in, Ø13.55 for ¾ in.

## Fits with

- [Tri-clamp gasket, ISO 2852 Type B: 1.5 and 2 in](https://xemstudio.com/objects/tri-clamp-gasket/)
- [Sanitary clamp weld ferrules, short and medium: ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-ferrules/)
- [Sanitary clamp end caps (16AMP): ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-end-caps/)
- [Tri-clamp flat gasket (hot joint, bore ID): 1.7 mm ring, ½ to 4 in](https://xemstudio.com/objects/tri-clamp-hot-gasket/)
- [Tri-clamp clamp, two-bolt: every flange size ½ to 4 in](https://xemstudio.com/objects/tri-clamp-clamps/)