PEX (Cross-Linked Polyethylene) Pipe


  • Material: PEX
  • Color: Available in multiple colors
  • Max. Length: up to 150m
  • Max. Pressure: up to 0.60Mpa
  • Diameter: 16mm ~ 25mm
  • Operating Temperature: -40℃ ~ 110℃
  • Wall Thickness: up to 30mm

Salient Features

  • Resistant to chemicals
  • Ability to withstand freezing temperatures better than rigid materials, such as copper or PVC
  • Highly flexible and durable

PEX (cross-linked polyethylene) pipe is a type of flexible plastic plumbing tubing used for both hot and cold water supply lines. The formation of PEX (cross-linked polyethylene) pipe involves a process called cross-linking, which enhances the polymer’s properties and makes it suitable for various applications, particularly in plumbing. There are three main methods for cross-linking PEX: peroxide (PEX-a), silane (PEX-b), and electron beam (PEX-c).

Peroxide Method (PEX-a):

  • In this method, polyethylene is mixed with a peroxide catalyst.
  • The mixture is then extruded through a die to form the pipe’s initial shape.
  • The extruded pipe is exposed to high-temperature water or steam, causing the peroxide to decompose.
  • The decomposition of peroxide generates free radicals, which initiate the cross-linking of the polymer chains.
  • This method, known as the Engel method, produces PEX-a pipe with a highly uniform and flexible cross-linked structure.

Silane Method (PEX-b):

  • Polyethylene is mixed with a silane compound to create a silane-grafted polyethylene.
  • The silane-grafted polyethylene is then extruded into the desired pipe shape.
  • The extruded pipe is exposed to moisture, which activates the silane groups, leading to a reaction that forms cross-links between the polymer chains.
  • This method produces PEX-b pipe, which is known for its balance of flexibility and durability.

Electron Beam Method (PEX-c):

  • In this method, the polyethylene is extruded into the desired pipe shape.
  • The extruded pipe is then exposed to high-energy electron beams.
  • The energy from the electron beams induces the formation of free radicals, initiating the cross-linking process.
  • PEX-c pipe is characterized by its consistent and controlled cross-linking, resulting in a durable and heat-resistant product.

Each method of cross-linking has its advantages, and the choice between them often depends on factors such as the intended application, manufacturing preferences, and regional standards. PEX pipes, regardless of the cross-linking method used, exhibit improved properties such as enhanced resistance to temperature, chemicals, and stress cracking compared to non-cross-linked polyethylene.


  • Water Supply Lines
  • Radiant Floor Heating Systems
  • Hydronic Heating Systems
  • Snow and Ice Melting Systems
  • Potable Water Distribution
  • Fire Sprinkler Systems
  • Mobile Home Plumbing