# Sanitary clamp elbows, 90° and 45°, ½ to 4 in (tri-clamp style, BPE)

> What is the centre-to-face dimension of a 2 inch sanitary clamp elbow?

- Category: Hardware › Sanitary clamp fittings
- Kind: Standard part
- Basis: ASME BPE / 3-A clamp-fitting dimensions published identically by two manufacturers; ISO 2852 face profile; drawn by Xem Studio from those numbers
- Page: https://xemstudio.com/objects/sanitary-clamp-elbows/ · JSON: https://xemstudio.com/api/geometry?object=sanitary-clamp-elbows · Plain text: https://xemstudio.com/objects/sanitary-clamp-elbows/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

- Clamp × clamp elbows: 90° (2CMP) and 45° (2KMP), both on the same centreline radius per size; a short straight sits between each face and the bend (0.5 in, 4 in: 0.625 in).
- Centre to face is measured from the intersection of the two leg centrelines to the face; that is the number to lay out a run with.
- Faces: ISO 2852 profile (2.85 mm rim, 1.6 mm gasket recess, 20° back cone) on the BPE flange diameters ½–¾ in 25.0, 1–1½ in 50.5, 2 in 64.0, 2½ in 77.5, 3 in 91.0, 4 in 119.0 mm; tube OD 12.7 / 19.05 / 25.4 / 38.1 / 50.8 / 63.5 / 76.2 / 101.6 mm, wall 1.65 mm (4 in: 2.11). The gasket-groove diameter on ½, ¾ and 4 in is derived (flange − 7.0 / 7.5 mm, the land width of every size ISO 2852 lists); the rest is from the standard.

## 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 to any fitting of the same size | clamp | all |

## Sizes

| size_in | tube_od_mm | flange_mm | c_to_f_90_mm | c_to_f_45_mm | radius_mm |
|---|---|---|---|---|---|
| ½ | 12.7 | 25.0 | 41.3 | 24.5 | 28.6 |
| ¾ | 19.05 | 25.0 | 41.3 | 24.5 | 28.6 |
| 1 | 25.4 | 50.5 | 50.8 | 28.6 | 38.1 |
| 1½ | 38.1 | 50.5 | 69.8 | 36.5 | 57.1 |
| 2 | 50.8 | 64.0 | 88.9 | 44.4 | 76.2 |
| 2½ | 63.5 | 77.5 | 107.9 | 52.4 | 95.2 |
| 3 | 76.2 | 91.0 | 127.0 | 60.3 | 114.3 |
| 4 | 101.6 | 119.0 | 168.3 | 79.4 | 152.4 |

## 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 (16 parts, CC BY 4.0, Xem Studio)

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

- elbow-90-0.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-0.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-0.5in.stl) — ½ in 90° clamp × clamp elbow (2CMP): 1.625 in centre to face, R 1.125 in
- elbow-45-0.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-0.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-0.5in.stl) — ½ in 45° clamp × clamp elbow (2KMP): 0.966 in centre to face, R 1.125 in
- elbow-90-0.75in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-0.75in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-0.75in.stl) — ¾ in 90° clamp × clamp elbow (2CMP): 1.625 in centre to face, R 1.125 in
- elbow-45-0.75in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-0.75in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-0.75in.stl) — ¾ in 45° clamp × clamp elbow (2KMP): 0.966 in centre to face, R 1.125 in
- elbow-90-1in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-1in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-1in.stl) — 1 in 90° clamp × clamp elbow (2CMP): 2.0 in centre to face, R 1.5 in
- elbow-45-1in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-1in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-1in.stl) — 1 in 45° clamp × clamp elbow (2KMP): 1.125 in centre to face, R 1.5 in
- elbow-90-1.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-1.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-1.5in.stl) — 1½ in 90° clamp × clamp elbow (2CMP): 2.75 in centre to face, R 2.25 in
- elbow-45-1.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-1.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-1.5in.stl) — 1½ in 45° clamp × clamp elbow (2KMP): 1.437 in centre to face, R 2.25 in
- elbow-90-2in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-2in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-2in.stl) — 2 in 90° clamp × clamp elbow (2CMP): 3.5 in centre to face, R 3.0 in
- elbow-45-2in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-2in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-2in.stl) — 2 in 45° clamp × clamp elbow (2KMP): 1.75 in centre to face, R 3.0 in
- elbow-90-2.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-2.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-2.5in.stl) — 2½ in 90° clamp × clamp elbow (2CMP): 4.25 in centre to face, R 3.75 in
- elbow-45-2.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-2.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-2.5in.stl) — 2½ in 45° clamp × clamp elbow (2KMP): 2.063 in centre to face, R 3.75 in
- elbow-90-3in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-3in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-3in.stl) — 3 in 90° clamp × clamp elbow (2CMP): 5.0 in centre to face, R 4.5 in
- elbow-45-3in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-3in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-3in.stl) — 3 in 45° clamp × clamp elbow (2KMP): 2.375 in centre to face, R 4.5 in
- elbow-90-4in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-4in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-90-4in.stl) — 4 in 90° clamp × clamp elbow (2CMP): 6.625 in centre to face, R 6.0 in
- elbow-45-4in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-4in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-elbows/elbow-45-4in.stl) — 4 in 45° clamp × clamp elbow (2KMP): 3.125 in centre to face, R 6.0 in

## How it fits

### Connects to
- [Tri-clamp clamps (printable two-bolt), hot-joint gaskets and heat shields: every flange size, ½ to 4 in](https://xemstudio.com/objects/tri-clamp-clamps/): a clamp and gasket at each face
- [Sanitary clamp tees, short-outlet tees and crosses, ½ to 4 in (tri-clamp style, BPE)](https://xemstudio.com/objects/sanitary-clamp-tees-crosses/): same faces, same sizes
- [Sanitary clamp caps, ferrules, spools and gaskets, ½ to 4 in (tri-clamp style, BPE)](https://xemstudio.com/objects/sanitary-clamp-caps-ferrules-spools/): spools between fittings, caps to close

### Alternatives
- [Sanitary clamp reducers, concentric and eccentric, ½ to 4 in (tri-clamp style, BPE)](https://xemstudio.com/objects/sanitary-clamp-reducers/): change size instead of direction

## Questions

**What is the centre-to-face of a 2 in sanitary 90° clamp elbow?**

3.50 in (88.9 mm), on a 3.0 in (76.2 mm) centreline radius; the 45° is 1.75 in (44.5 mm).

**Are ½ and ¾ in clamp elbows the same size?**

Yes: both use the 25.0 mm mini flange and a 1.625 in centre to face (90°).

**Do these mate with real sanitary fittings?**

Yes: the faces are the ISO 2852 / BPE profile, so a standard clamp and gasket join them to any clamp fitting of the same size.

## Fits with

- [Sanitary clamp tees, short-outlet tees and crosses, ½ to 4 in (tri-clamp style, BPE)](https://xemstudio.com/objects/sanitary-clamp-tees-crosses/)
- [Sanitary clamp reducers, concentric and eccentric, ½ to 4 in (tri-clamp style, BPE)](https://xemstudio.com/objects/sanitary-clamp-reducers/)
- [Sanitary clamp caps, ferrules, spools and gaskets, ½ to 4 in (tri-clamp style, BPE)](https://xemstudio.com/objects/sanitary-clamp-caps-ferrules-spools/)
- [Tri-clamp clamps (printable two-bolt), hot-joint gaskets and heat shields: every flange size, ½ to 4 in](https://xemstudio.com/objects/tri-clamp-clamps/)
- [Tri-clamp spool (two ferrules on a tube), 1.5 and 2 inch](https://xemstudio.com/objects/tri-clamp-spool/)
- [Tri-clamp (Tri-Clover) sanitary ferrule, 1/2 to 4 inch](https://xemstudio.com/objects/tri-clamp-ferrule/)