# ISO 2852 clamp ferrules (welded-type liners), 25 to 219.1 mm tube: bore, neck, flange, length, groove

> What are the ISO 2852 clamp ferrule dimensions (bore, neck OD, flange, length, groove) for 25 to 219.1 mm tube?

- Category: Tri-clamp & pipe › Clamp fittings
- Kind: Standard part
- Basis: ISO 2852:1993 Table 2 (welded-type liner) and Figure 1 (face profile), read from ISO's public sample pages; 38 mm row cross-checked against Alfa Laval's ISO 2852 ferrule listing
- Page: https://xemstudio.com/objects/sanitary-clamp-iso-2852-ferrules/ · JSON: https://xemstudio.com/api/geometry?object=sanitary-clamp-iso-2852-ferrules · Plain text: https://xemstudio.com/objects/sanitary-clamp-iso-2852-ferrules/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

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

## Notes

- Dimensions are exact nominal (no tolerance). Nominal size = tube OD in mm (ISO 2037 / ISO 1127 tube). C6 bore, C8 neck OD at the weld end, C7 flange OD, F2 overall length, C2 gasket-groove diameter.
- Face per ISO 2852 Figure 1: flat from the bore to C7, one gasket groove on C2 1.6 deep with R1.2 bottom and 23° walls, flange 2.85 thick, 20° clamp back cone. Small edge radii (P1, P2 0.8, R2 2) are not drawn.
- Same clamp flanges as the inch and DIN 32676 series: 50.5, 64, 77.5, 91, 106 and 119 mm flanges take the matching tri-clamp clamp and Type B gasket. 40 mm tube already moves to the 64 mm flange (DIN 32676 DN40 stays on 50.5).
- Files for 25, 38, 40, 51, 63.5, 76.1, 88.9 and 101.6 mm. 114.3 to 219.1 are listed but not drawn: the face-profile column for the large sizes could not be read cleanly from the sample pages.
- ISO 2852 also has an expanded-type liner (tube rolled into it, 12 to 76.1 mm, Table 1): bore C5 = tube OD, neck C1 = tube OD + 4.0 to 5.8, length F3 16 to 30. That type is not on this page.

## 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 face | flange C7 (38 mm tube 50.5, 51 mm tube 64) | tri-clamp clamp + Type B gasket of the same flange | clamp | all |
| weld end | neck C8 × bore C6 (38: 38.6 × 35.6) | ISO tube of the nominal OD, butt-welded | designed | all |

## Sizes

| tube OD mm | C6 bore | C8 neck OD | C7 flange | F2 length | C2 groove | file |
|---|---|---|---|---|---|---|
| 25 | 22.6 | 25.6 | 50.5 | 21.5 | 43.5 | yes |
| 33.7 | 31.3 | 34.3 | 50.5 | 21.5 | 43.5 | no |
| 38 | 35.6 | 38.6 | 50.5 | 21.5 | 43.5 | yes |
| 40 | 37.6 | 40.6 | 64.0 | 21.5 | 56.5 | yes |
| 51 | 48.6 | 51.6 | 64.0 | 21.5 | 56.5 | yes |
| 63.5 | 60.3 | 64.1 | 77.5 | 21.5 | 70.5 | yes |
| 70 | 66.8 | 70.6 | 91.0 | 21.5 | 83.5 | no |
| 76.1 | 72.9 | 76.7 | 91.0 | 21.5 | 83.5 | yes |
| 88.9 | 84.9 | 89.8 | 106.0 | 21.5 | 97.0 | yes |
| 101.6 | 97.6 | 102.5 | 119.0 | 21.5 | 110.0 | yes |
| 114.3 | 110.3 | 115.6 | 130.0 | 28.0 | 122.0 | no |
| 139.7 | 135.7 | 141.2 | 155.0 | 28.0 | 146.0 | no |
| 168.3 | 163.1 | 170.0 | 183.0 | 28.0 | 174.0 | no |
| 219.1 | 213.9 | 221.2 | 233.5 | 28.0 | 225.0 | no |

## Where the files are

- ISO (sample pages via iTeh): [ISO 2852:1993 Stainless steel clamp pipe couplings for the food industry: Table 2 welded-type liner, Figure 1 face](https://cdn.standards.iteh.ai/samples/7851/ed46f309bca445d2b99cf80609e01429/ISO-2852-1993.pdf) — web — Publisher's page; dimensions are facts
- ISO (sample pages via iTeh): [ISO 2852:1974 clamp liners: face profile and flange / groove diameters](https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf) — web — Publisher's page; dimensions are facts
- Alfa Laval: [Clamp ferrule 38 mm, ISO 2852 (1279889): OD/ID 38.60/35.60, A 50.50, B 21.50](https://shop.alfalaval.com/en-bz/hygienic-fittings-iso-en-10357-d--3261317/clamp-ferrule-38mm--1279889-) — web — Publisher's page; dimensions are facts

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

Index: https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/index.json

- sanitary-clamp-iso-2852-ferrules--101-6: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--101-6.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--101-6.stl) — ISO 2852 welded-type clamp ferrule for 101.6 mm tube (flange 119, bore 97.6, length 21.5)
- sanitary-clamp-iso-2852-ferrules--25: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--25.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--25.stl) — ISO 2852 welded-type clamp ferrule for 25 mm tube (flange 50.5, bore 22.6, length 21.5)
- sanitary-clamp-iso-2852-ferrules--38: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--38.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--38.stl) — ISO 2852 welded-type clamp ferrule for 38 mm tube (flange 50.5, bore 35.6, length 21.5)
- sanitary-clamp-iso-2852-ferrules--40: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--40.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--40.stl) — ISO 2852 welded-type clamp ferrule for 40 mm tube (flange 64, bore 37.6, length 21.5)
- sanitary-clamp-iso-2852-ferrules--51: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--51.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--51.stl) — ISO 2852 welded-type clamp ferrule for 51 mm tube (flange 64, bore 48.6, length 21.5)
- sanitary-clamp-iso-2852-ferrules--63-5: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--63-5.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--63-5.stl) — ISO 2852 welded-type clamp ferrule for 63.5 mm tube (flange 77.5, bore 60.3, length 21.5)
- sanitary-clamp-iso-2852-ferrules--76-1: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--76-1.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--76-1.stl) — ISO 2852 welded-type clamp ferrule for 76.1 mm tube (flange 91, bore 72.9, length 21.5)
- sanitary-clamp-iso-2852-ferrules--88-9: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--88-9.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-iso-2852-ferrules/sanitary-clamp-iso-2852-ferrules--88-9.stl) — ISO 2852 welded-type clamp ferrule for 88.9 mm tube (flange 106, bore 84.9, length 21.5)

## Questions

**How big is an ISO 2852 ferrule for 38 mm tube?**

Bore 35.6, neck OD 38.6, flange 50.5, 21.5 long, gasket groove on 43.5 mm (exact nominal).

**Does an ISO 2852 ferrule fit a 1½ in tri-clamp?**

Up to 38 mm tube the flange is 50.5 mm, the same as 1–1½ in, so the same clamp and gasket fit; 40 and 51 mm use the 64 mm (2 in) flange.

**How is ISO 2852 different from DIN 32676?**

Same face and flange sizes, different tube: ISO 2852 sizes are tube OD (25, 33.7, 38, 51, 76.1 mm…), DIN 32676 series A sits on DIN 11850 tube (29, 35, 41, 53 mm…).

## Fits with

- [DIN 32676 clamp ferrules, series A (metric), DN10 to DN150](https://xemstudio.com/objects/sanitary-clamp-din-32676-ferrules/)
- [DIN 32676 clamp gaskets (Type B profile), DN10 to DN150](https://xemstudio.com/objects/sanitary-clamp-din-32676-gaskets/)
- [Tri-clamp clamp, two-bolt: every flange size ½ to 4 in](https://xemstudio.com/objects/tri-clamp-clamps/)
- [Tri-clamp (Tri-Clover) sanitary ferrule, 1/2 to 4 inch](https://xemstudio.com/objects/tri-clamp-ferrule/)
- [Stainless tube, metric hygienic: DIN 11850 (= EN 10357-A, DN10–DN200) and Reihe 1, ISO 1127 and 'Range C' lists, OD × wall + 100 mm sections](https://xemstudio.com/objects/stainless-tube-din-11850-en-10357-iso-1127/)
- [Two-bolt clamps for DIN 32676 flanges 34, 106, 155 and 183 mm](https://xemstudio.com/objects/sanitary-clamp-din-32676-clamps/)