IFAN Durability PEX-EVOH Pipes

Maximum temperature is 95°C (203°F)

PEX-EVOH pipes have a maximum operating temperature of 95°C. This is the standard for PEX pipes. Short-term exposure to 100°C is also acceptable. Example: residential hot water at 60°C is well within the limit.

Continuous temperature rating

The continuous operating temperature is 95°C. This is for permanent, steady-state operation. Higher temperatures reduce the pipe’s lifespan. PEX-EVOH pipes are rated for long-term performance at 95°C.

Short-term temperature spikes

Pipes can handle 100°C for short periods. This covers system upsets and testing. The duration must be limited. PEX-EVOH pipes can tolerate brief overheating.

Temperature derating curve

Higher temperatures require pressure derating. At 95°C, the pressure rating drops. Always consult the derating curve. PEX-EVOH pipes follow standard PEX derating rules.

Minimum operating temperature

The minimum temperature is -10°C (14°F). Below this, the pipe becomes brittle. Freeze protection is required. PEX-EVOH pipes are not for extreme cold.

Effect of temperature on lifespan

Higher temperatures reduce the pipe’s lifespan. At 95°C, the lifespan is 25-30 years. At 70°C, the lifespan is 50+ years. PEX-EVOH pipes last longer at lower temperatures.

Effect of temperature on EVOH barrier

EVOH performance decreases at very high temperatures. The oxygen barrier is less effective above 95°C. This is another reason to limit temperature. PEX-EVOH pipes perform best below 95°C.

Example: residential hot water system

A home uses hot water at 60°C and 4 bar. Cross-linked Polyethylene – Ethylene Vinyl Alcohol Copolymer pipes easily handle these conditions. The pipe lasts 50+ years. Example: a reliable, long-lasting system.

Example: underfloor heating

Underfloor heating operates at 40-60°C. Cross-linked Polyethylene – Ethylene Vinyl Alcohol Copolymer pipes are perfect for this temperature. The pipe stays well within its limits. Example: a comfortable, efficient heating system.

Example: high-temperature solar thermal

Solar thermal systems can reach 95°C. Cross-linked Polyethylene – Ethylene Vinyl Alcohol Copolymer pipes are suitable for this application. The pipe must be derated for pressure. Example: a safe, effective solar heating system.

Manufacturer specifications

Always check the manufacturer’s temperature rating. Some brands may offer higher or lower limits. The specifications vary slightly. PEX-EVOH pipes follow industry standards.

Final temperature summary

PEX-EVOH pipes have a maximum operating temperature of 95°C (203°F). Short-term exposure to 100°C is acceptable. Higher temperatures reduce pressure rating and lifespan. The minimum temperature is -10°C. The EVOH barrier performs best below 95°C. Always consult manufacturer specifications for your specific product. Cross-linked Polyethylene – Ethylene Vinyl Alcohol Copolymer pipes are suitable for most hot water and heating applications. Example: a versatile pipe for temperatures up to 95°C.

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