# Tri-clamp spool (two ferrules on a tube), 1.5 and 2 inch

> What are the face-to-face lengths and volumes of 1.5 and 2 inch tri-clamp spools?

- Category: Hardware › Tri-clamp
- Kind: Hardware
- Basis: ISO 2852 faces on ASME BPE 16 ga tube; catalog lengths
- Page: https://xemstudio.com/objects/tri-clamp-spool/ · JSON: https://xemstudio.com/api/geometry?object=tri-clamp-spool · Plain text: https://xemstudio.com/objects/tri-clamp-spool/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

## Notes

- Face-to-face length is the spool's stated length. Internal volume sets a thermoacoustic engine's resonance; volumes assume 16 ga tube.
- 2 in bore: 50.8 − 2×1.65 = 47.5 mm → 17.7 cm³ per cm. 1.5 in: 34.8 mm → 9.5 cm³ per cm.
- Stack-up per joint: two faces + one compressed gasket web ≈ 2.1 mm (ISO 2852 V). A clamp adds about 10 mm of radial envelope beyond the flange.
- The files carry the full ISO 2852 face, so a printed spool mates with a printed cap and a real clamp for mock-ups.

## Sizes

| size_in | length_in | length_mm | bore_mm | volume_cm3 |
|---|---|---|---|---|
| 1.5 | 3 | 76.2 | 34.8 | 72 |
| 1.5 | 6 | 152.4 | 34.8 | 145 |
| 1.5 | 12 | 304.8 | 34.8 | 290 |
| 2 | 3 | 76.2 | 47.5 | 135 |
| 2 | 6 | 152.4 | 47.5 | 270 |
| 2 | 12 | 304.8 | 47.5 | 540 |
| 2 | 18 | 457.2 | 47.5 | 810 |

## Where the files are

- ISO (via iTeh sample): [ISO 2852:1974 clamp liners with gaskets (face and gasket profile, §6.1 and §8)](https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf) — PDF — standard excerpt; dimensions are facts
- McMaster-Carr: [Sanitary tube spools (free STEP per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/sanitary-fittings/) — STEP, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link)
- Glacier Tanks: [Tri-clamp spools (dimensions on product pages)](https://www.glaciertanks.com/tri-clamp-spools) — web, PDF — vendor catalog (verify at link)

## Free STEP/STL (7 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/tri-clamp-spool/index.json

- tc-spool-1.5in-3in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-3in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-3in.stl) — 1.5 in spool, 76.2 mm face to face, 16 ga; ISO 2852 faces
- tc-spool-1.5in-6in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-6in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-6in.stl) — 1.5 in spool, 152.4 mm face to face, 16 ga; ISO 2852 faces
- tc-spool-1.5in-12in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-12in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-1.5in-12in.stl) — 1.5 in spool, 304.8 mm face to face, 16 ga; ISO 2852 faces
- tc-spool-2in-3in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-3in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-3in.stl) — 2 in spool, 76.2 mm face to face, 16 ga; ISO 2852 faces
- tc-spool-2in-6in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-6in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-6in.stl) — 2 in spool, 152.4 mm face to face, 16 ga; ISO 2852 faces
- tc-spool-2in-12in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-12in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-12in.stl) — 2 in spool, 304.8 mm face to face, 16 ga; ISO 2852 faces
- tc-spool-2in-18in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-18in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-spool/tc-spool-2in-18in.stl) — 2 in spool, 457.2 mm face to face, 16 ga; ISO 2852 faces

## Questions

**What is the internal volume of a 2 inch tri clamp spool?**

About 17.7 cm³ per cm of length with 16 ga tube (47.5 mm bore): a 6 in spool is roughly 270 cm³, a 12 in spool 540 cm³ before the ferrule faces.

**What is the bore of a 1.5 inch tri clamp spool?**

34.8 mm (38.1 mm OD tube, 1.65 mm wall), about 9.5 cm³ per cm.

**How long is a tri clamp joint stack-up?**

Two ferrule faces plus one compressed gasket web, about 2.1 mm per joint (ISO 2852 V). A clamp adds roughly 10 mm of radial envelope beyond the flange.

## Fits with

- [Tri-clamp (Tri-Clover) sanitary ferrule, 1/2 to 4 inch](https://xemstudio.com/objects/tri-clamp-ferrule/)
- [Tri-clamp end cap and gasket, 1.5 and 2 inch](https://xemstudio.com/objects/tri-clamp-end-cap/)