Coaxial Tubing Service Life.
Coaxial tubing does not have a fixed expiration date. Service life is dependent on operating conditions and material aging over time.
This tubing design consists of:
- Polyurethane outer tube: carries compressed air
- Nylon inner tube: carries fluid
Key Factors Affecting Life
- Temperature exposure
- Fluid compatibility
- Air quality (moisture, contamination)
- Mechanical stress (flexing, bend radius, vibration)
- Environmental exposure (UV, heat)
These factors can lead to hardening, brittleness, cracking, or reduced performance over time.
Service Life Recommendation
Because service life varies by application, a fixed lifespan cannot be established.
Regular inspection and condition-based replacement are recommended to ensure reliable performance.
When to Replace
Replace tubing if any of the following are observed:
- Loss of flexibility or hardening (PU outer tube)
- Cracking, splitting, brittleness
- Brittleness in the nylon inner tube
- Reduced or inconsistent fluid delivery
- Leakage
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