In industrial piping applications, PTFE (Teflon) hose outperforms traditional metal hose in several key performance indicators, making it the preferred choice for an increasing number of fields.
1. Corrosion Resistance – PTFE hose exhibits strong chemical inertness and is virtually unaffected by strong acids, alkalis, and organic solvents. In contrast, metal hoses (even those made of 304 or 316L stainless steel) may still suffer from pitting corrosion or stress corrosion cracking when exposed to corrosive media over long periods.
2. Friction Coefficient and Anti-Stick Properties – PTFE hose has the lowest friction coefficient (approximately 0.04) among all solid materials. Its non-stick surface ensures smooth medium flow and resists scaling. Metal hoses have relatively rough inner walls, are prone to material residue, and are more difficult to clean.
3. Temperature Resistance and Flexibility – PTFE hose can operate stably over a long-term temperature range of -80°C to +260°C and maintains good flexibility without requiring a corrugated structure, making it less prone to fatigue failure. Metal hoses, while having a similar temperature range, are susceptible to corrugation fatigue cracking after repeated bending.
4. Electrical Insulation – PTFE hose offers excellent electrical insulation properties with high dielectric strength, making it suitable for applications with special requirements for static electricity or electrical insulation. Metal hoses are good electrical conductors and carry a risk of electrochemical corrosion.
Conclusion – Under working conditions involving strong corrosion, high purity requirements, easy scaling, or high electrical insulation needs, PTFE hose demonstrates significantly better overall performance than traditional metal hose.