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Cross-linked polyethylene (PEX)

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Cross-linked polyethylene (PEX)

Cross-linked polyethylene (PEX)

Polymer Type: Thermoset

Key Properties

  • Flexibility
  • Freeze resistance
  • Good chemical resistance
  • Longevity

Applications

  • Residential plumbing: Hot and cold water supply lines, radiant heating systems, underground water lines.
  • Commercial plumbing: Building water supply systems, hydronic heating and cooling systems, industrial process piping.
  • Marine applications: Boat and offshore platform water systems.
  • Underfloor heating: Flexible pipes for efficient heat distribution.

Additional Information

Cross-linked polyethylene (PEX) is a type of polyethylene modified by a process that creates covalent bonds between the polymer chains. This increases the material’s strength, flexibility, and resistance to temperature and chemicals compared to standard polyethylene.

PEX is popular in plumbing applications due to its unique properties. Its flexibility simplifies installation, eliminating the need for sharp bends or rigid connections. Its freeze resistance protects against pipe bursts during cold weather. Additionally, its leak-proof connections ensure reliable water delivery.

However, PEX can be susceptible to UV degradation if exposed to direct sunlight.

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