Hose calculators
Size crimps, check offsets, estimate pressure loss and convert units. Every result is a guide — send us the numbers and our engineers will confirm.
Hose crimp diameter
Suggested crimp diameter from hose, shank and ferrule dimensions.
- CRIMP DIAMETER (MM)
- 38.05 mm
- CRIMP DIAMETER (IN)
- 1.498 in
Crimp diameter = shank OD + 2 × ferrule wall + (hose OD − hose ID) × (1 − compression %). A guide only — hydrostatic pressure testing of every assembly is strongly recommended, and PTFE assemblies should use the crimp spec for the fitting in use.
Pressure loss
Pressure drop along a straight hose or pipe run.
- TOTAL PRESSURE DROP
- 31.52 kPa
- TOTAL (PSI)
- 4.572 psi
- DROP PER METRE
- 3.152 kPa/m
- FLOW VELOCITY
- 2.351 m/s
- REYNOLDS NUMBER
- 44,497
- FLOW REGIME
- Turbulent
- FRICTION FACTOR (DARCY)
- 0.02171
Darcy–Weisbach, with the Colebrook–White friction factor for turbulent flow and 64/Re for laminar flow. Straight run only — add fittings and bends separately.
Offset and moving loops
Live hose length for offset motion and horizontal travelling loops.
Offset motion
- LIVE HOSE LENGTH, L
- 222.7 mm
- PROJECTED LENGTH, LP
- 219.1 mm
L = √(6RX + X²), Lp = √(L² − X²), worked in inches. Keep X under 25% of R. If L and Lp differ a lot, take care at installation so the hose and braid aren’t stressed at full offset.
Horizontal moving loop
For a hose loop between a fixed and a travelling connection on the same horizontal plane.
- LIVE HOSE LENGTH, L
- 1,271 mm
- LOOP HEIGHT, H1
- 521.5 mm
- LOOP HEIGHT AT REST, H2
- 286 mm
L = 4R + 1.57S, H1 = 1.43R + 0.785S, H2 = 1.43R.
Metallic corrosion resistance
How SS304, SS316, carbon steel and brass fittings stand up to common media.
35 of 35 media shown
| MEDIA | SS304 | SS316 | CARBON STEEL | BRASS |
|---|---|---|---|---|
| Acetic acid (glacial) | 2 · Limited use | 1 · Recommended | 3 · Not recommended | 3 · Not recommended |
| Acetone | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Air, compressed | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Ammonia, anhydrous | 1 · Recommended | 1 · Recommended | 1 · Recommended | 3 · Not recommended |
| Ammonium hydroxide | 1 · Recommended | 1 · Recommended | 2 · Limited use | 3 · Not recommended |
| Beer and wine | 1 · Recommended | 1 · Recommended | 3 · Not recommended | 2 · Limited use |
| Brine (sodium chloride) | 2 · Limited use | 2 · Limited use | 2 · Limited use | 2 · Limited use |
| Carbon dioxide, dry | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Chlorine, dry | 2 · Limited use | 2 · Limited use | 1 · Recommended | 2 · Limited use |
| Chlorine, wet | 3 · Not recommended | 3 · Not recommended | 3 · Not recommended | 3 · Not recommended |
| Citric acid | 1 · Recommended | 1 · Recommended | 3 · Not recommended | 2 · Limited use |
| Diesel | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Ethanol | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Ferric chloride | 3 · Not recommended | 3 · Not recommended | 3 · Not recommended | 3 · Not recommended |
| Formaldehyde | 1 · Recommended | 1 · Recommended | 2 · Limited use | 2 · Limited use |
| Hydraulic oil (mineral) | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Hydrochloric acid | 3 · Not recommended | 3 · Not recommended | 3 · Not recommended | 3 · Not recommended |
| Hydrofluoric acid | 3 · Not recommended | 3 · Not recommended | 3 · Not recommended | 3 · Not recommended |
| Hydrogen peroxide (30%) | 2 · Limited use | 1 · Recommended | 3 · Not recommended | 3 · Not recommended |
| Hydrogen sulphide, wet | 2 · Limited use | 2 · Limited use | 3 · Not recommended | 3 · Not recommended |
| Methanol | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Milk and dairy | 1 · Recommended | 1 · Recommended | 3 · Not recommended | 2 · Limited use |
| Nitric acid (10–65%) | 1 · Recommended | 1 · Recommended | 3 · Not recommended | 3 · Not recommended |
| Nitrogen | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Oxygen, gas | 1 · Recommended | 1 · Recommended | 2 · Limited use | 1 · Recommended |
| Petrol | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Phosphoric acid (10%) | 2 · Limited use | 1 · Recommended | 3 · Not recommended | 3 · Not recommended |
| Seawater | 2 · Limited use | 2 · Limited use | 3 · Not recommended | 2 · Limited use |
| Sodium hydroxide (20%) | 1 · Recommended | 1 · Recommended | 1 · Recommended | 2 · Limited use |
| Sodium hypochlorite | 3 · Not recommended | 2 · Limited use | 3 · Not recommended | 3 · Not recommended |
| Steam | 1 · Recommended | 1 · Recommended | 1 · Recommended | 2 · Limited use |
| Sulphuric acid (<10%) | 3 · Not recommended | 2 · Limited use | 3 · Not recommended | 3 · Not recommended |
| Sulphuric acid (98%) | 2 · Limited use | 2 · Limited use | 1 · Recommended | 3 · Not recommended |
| Toluene | 1 · Recommended | 1 · Recommended | 1 · Recommended | 1 · Recommended |
| Water, fresh | 1 · Recommended | 1 · Recommended | 2 · Limited use | 1 · Recommended |
Ratings are for the fitting and ferrule metal at ambient temperature: 1 recommended, 2 partially resistant (not for continuous use), 3 not recommended for any use. Temperature, concentration and contamination change the picture — confirm with our engineers before you specify. The PTFE liner itself is rated in Chem Check.
Pressure conversion
bar, psi, kPa, MPa, atm, kgf/cm², head of water and more.
Flow conversion
Volume and mass flow in metric, US and imperial units.
Measurement conversion
Length, area, volume, mass and temperature.
Have the numbers? Send them with your media and temperature and we’ll specify the hose.
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