IFAN Reliable Factory PEX-EVOH Pipes

Less than 0.1 mg/m²·day at 40°C

PEX-EVOH pipes typically have an oxygen permeability rate below 0.1 mg/m²·day. This is measured at 40°C . This is the standard requirement for oxygen barrier pipes. Example: a pipe that effectively blocks oxygen.

Comparison to standard PEX

Standard PEX has a much higher oxygen permeability rate. It can be 50-100 times higher than EVOH . This allows oxygen to pass through the wall. PEX-EVOH pipe is far superior in oxygen barrier performance.

DIN 4726 standard requirement

The German standard DIN 4726 sets the limit for oxygen barrier pipes . It requires permeability below 0.1 mg/m²·day at 40°C . PEX-EVOH pipe meets this requirement.

Testing temperature conditions

Oxygen permeability is temperature-dependent . Higher temperatures increase the permeability rate . Tests are conducted at 40°C as a standard reference . PEX-EVOH pipe is tested under standard conditions.

Long-term barrier stability

The EVOH layer maintains its barrier over time . Permeability remains low for decades . The pipe provides long-term protection . PEX-EVOH pipe is a reliable long-term barrier.

Example: heating system with EVOH

A heating system uses PEX-EVOH pipe with a 0.08 mg/m²·day rate. The system is protected from oxygen corrosion. The boiler lasts 25+ years without rust . Example: a safe, corrosion-free system.

Example: standard PEX heating system

A heating system uses standard PEX pipe without a barrier. Oxygen permeates at 5 mg/m²·day . The boiler shows rust after 5 years . PEX-EVOH pipe prevents this problem.

Why low permeability matters

Low permeability prevents oxygen from entering the water . Oxygen causes corrosion and sludge formation . This reduces system efficiency and lifespan . PEX-EVOH pipe ensures system longevity.

Manufacturer data

Manufacturers typically test and publish permeability rates . Values are often given at 40°C and 60°C . The rates remain below 0.1 mg/m²·day . PEX-EVOH pipe performance is well-documented.

Impact of temperature on permeability

Permeability increases at higher temperatures . At 60°C, the rate may rise slightly . Still, it remains well below standard PEX . PEX-EVOH pipe is effective at all operating temperatures.

Comparison to AL barrier pipes

Aluminum barrier pipes have similar low permeability . Both EVOH and AL meet DIN 4726 standards . Both are effective for heating systems . PEX-EVOH pipe is a cost-effective alternative.

Final permeability summary

PEX-EVOH pipe has a typical oxygen permeability rate below 0.1 mg/m²·day. This is measured at 40°C . It meets the DIN 4726 standard for oxygen barrier pipes . Standard PEX has a much higher rate . The low permeability prevents corrosion and extends system life. Temperature affects the rate slightly, but it remains effective. PEX-EVOH pipe provides long-term protection for heating systems. Example: a reliable, high-performance oxygen barrier.

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