IFAN Durable PEX-EVOH Pipes

Standard rating: 100 psi at 95°C

PEX-EVOH pipes typically handle 100 psi (6.9 bar). This rating applies at 95°C (203°F). It matches standard PEX pipe ratings exactly. Example: residential heating systems at 30 psi are very safe.

Higher rating at room temperature

At 23°C (73°F), the rating increases to 160 psi. This is the same derating curve as standard PEX. The EVOH layer does not affect pressure limits. PEX-EVOH pipes exceed residential needs at cold temperatures.

Burst pressure is much higher

The burst pressure tests at 400-600 psi typically. This is 4-6 times the working pressure. The safety margin protects against unexpected spikes. PEX-EVOH pipes have a large safety factor built in.

Temperature derating relationship

As temperature goes up, pressure rating goes down. At 60°C, the rating might be 130 psi. At 90°C, the rating drops to 105 psi. PEX-EVOH pipes follow standard polymer derating rules.

Maximum continuous temperature

The maximum continuous temperature is 95°C (203°F). This covers all domestic hot water and heating needs. Short-term spikes up to 110°C are acceptable. PEX-EVOH pipes handle occasional overheating safely.

Minimum temperature limit

The minimum temperature for installation is 5°C (41°F). Below this, the pipe becomes more brittle. Do not install in freezing conditions. PEX-EVOH pipes should be stored above freezing.

Example: typical residential heating system

A radiant floor system runs at 40°C and 15 psi. This is far below the 95°C and 100 psi maximum. PEX-EVOH pipes have a very large safety margin. Example: no risk of pressure or temperature failure.

Example: high-rise building booster pump

A building needs a booster pump for upper floors. The pump delivers 120 psi at 20°C. This is below the 160 psi rating at room temperature. PEX-EVOH pipes handle this comfortably.

What limits the rating

The PEX material determines the pressure and temperature limits. The EVOH layer does not affect either rating. The barrier is purely for oxygen protection. PEX-EVOH pipes are rated the same as standard PEX.

Testing requirements

Samples must pass a hydrostatic test at 150 psi. No leaks or damage allowed during testing. Burst tests go to 400+ psi minimum. Cross-linked Polyethylene – Ethylene Vinyl Alcohol Copolymer pipes are validated before sale.

DIN 4726 certification

DIN 4726 covers oxygen barrier requirements specifically. It requires the EVOH layer to meet permeation limits. The pressure and temperature ratings are covered by DIN 16892. Cross-linked Polyethylene – Ethylene Vinyl Alcohol Copolymer pipes must meet both standards.

Final rating summary

PEX-EVOH pipes carry 100 psi at 95°C (203°F). At room temperature, the rating is 160 psi. Burst pressure is 4-6 times higher for safety. The maximum continuous temperature is 95°C. Short-term spikes to 110°C are acceptable. The minimum installation temperature is 5°C. Residential systems are well within these limits. Always check manufacturer data for your specific pipe. Example: ratings that provide decades of safe service.

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