Yes, they require special storage
PEX-EVOH pipes need proper storage to prevent EVOH degradation. The EVOH layer is sensitive to moisture and UV. Special conditions are recommended by manufacturers. Example: store indoors in a dry, shaded area.
Moisture sensitivity
EVOH absorbs moisture from the air. This reduces its oxygen barrier properties. The EVOH layer can become less effective. PEX-EVOH pipe must be stored in a dry environment.
UV sensitivity
UV radiation degrades the EVOH layer. The pipe becomes brittle and weak. The barrier properties are permanently damaged. PEX-EVOH pipe must be protected from sunlight.
Temperature sensitivity
Extreme temperatures can damage the EVOH layer. High heat can soften the pipe. Very cold temperatures make it brittle. PEX-EVOH pipe should be stored at moderate temperatures.
Recommended storage conditions
Store pipes in a dry, covered area. Keep them away from direct sunlight. Maintain temperatures between 5°C and 40°C. PEX-EVOH pipe storage should be cool and dry.
Maximum storage time
Manufacturers recommend limited storage time. 12 months is the maximum storage duration. Longer storage may degrade the EVOH layer. PEX-EVOH pipe should be used promptly.
Moisture and UV protection
Cover the pipes with a tarp or plastic sheet. Use UV-resistant storage covers. Avoid storage near chemicals or solvents. PEX-EVOH pipe needs protection from environmental factors.
Example: proper storage in a warehouse
A warehouse stores PEX-EVOH pipe in a covered area. The pipes are kept away from windows. The temperature is controlled. PEX-EVOH pipe storage conditions meet manufacturer requirements. Example: a safe, effective storage method.
Example: improper outdoor storage
A contractor stores pipes outside in the sun. The pipes are exposed to rain and UV. PEX-EVOH pipes degrade from the exposure. Example: the pipes become brittle and unusable.
Signs of EVOH degradation
Discoloration on the pipe surface. Cracking or brittleness of the material. Loss of barrier properties. PEX-EVOH pipe degradation is visible.
Handling during installation
Avoid dropping or bending the pipe sharply. Use proper tools for cutting and joining. Protect the pipe from contamination. PEX-EVOH pipe handling requires care.
Final storage summary
PEX-EVOH pipes require special storage conditions. EVOH is sensitive to moisture and UV radiation. Store the pipes in a dry, shaded, temperature-controlled area. Avoid direct sunlight and extreme temperatures. Use the pipes within 12 months of purchase. Handle them carefully during installation. Following these guidelines ensures the EVOH layer remains effective. PEX-EVOH pipe is a reliable product when properly stored. Example: proper storage protects your investment.
