Checklist
1. Working pressure
Check:
- nominal pressure
- pressure peaks
Rule:
→ always include safety margin (1.5–2x)
2. Temperature
Consider:
- fluid temperature
- ambient temperature
3. Medium compatibility
Check:
- oil
- water
- chemicals
Wrong choice = failure
4. Bending radius
Too tight:
- flow restriction
- stress
- premature failure
5. External conditions
Check:
- abrasion
- impact
- environment
6. Movement and vibration
Dynamic systems require:
- high fatigue resistance
- flexibility
7. Length and routing
Too short:
→ stress
Too long:
→ twisting
8. Hose type
- standard (1SN, 2SN)
- high pressure (4SP, 4SH)
- thermoplastic
9. Assembly system
Use one system:
- hose
- fitting
- ferrule
10. Standards and certification
Check compliance:
- EN / ISO
Summary
Hydraulic hose selection is not a catalog decision.
It directly affects:
- safety
- reliability
- maintenance costs
Wrong choice = failure over time.