{"id":7145,"date":"2023-11-27T06:03:13","date_gmt":"2023-11-27T06:03:13","guid":{"rendered":"https:\/\/www.ifanfittings.com\/?p=7145"},"modified":"2025-12-31T11:49:43","modified_gmt":"2025-12-31T03:49:43","slug":"comment-sont-fabriques-les-tuyaux-pex","status":"publish","type":"post","link":"https:\/\/www.waterpipefactory.com\/fr\/connaissance\/comment-sont-fabriques-les-tuyaux-pex\/","title":{"rendered":"comment sont fabriqu\u00e9s les tuyaux PEX"},"content":{"rendered":"

How PEX Pipe is Made
An In-Depth Look at Manufacturing Crosslinked Polyethylene Tubing<\/p>\n\n\n\n

PEX has become one of the most widely used piping materials across residential and commercial building plumbing systems. But how is reliable, durable PEX pipe actually made? This article provides an in-depth explanation of the PEX manufacturing process and the steps that transform base plastic into highly engineered tubing.Usine IFAN<\/a>\u00a0avec plus de 30 ans d'exp\u00e9rience dans la fabrication, prend en charge la personnalisation des couleurs\/tailles et propose des \u00e9chantillons gratuits. Bienvenue pour consulter pour<\/a> catalogue et \u00e9chantillons gratuits. <\/p>\n\n\n\n

\"tuyau<\/figure>\n\n\n\n

PEX Raw Material<\/h2>\n\n\n\n

PEX manufacturing begins with plastic resin in pellet form as the raw material. The specific plastic used is high molecular weight polyethylene, usually designated as PE-HD (high-density polyethylene).<\/p>\n\n\n\n

PE-HD offers strength, chemical resistance, and processing properties that make it an ideal starting point for PEX production. The resin gets carefully formulated to purity and density specifications ideal for piping applications.<\/p>\n\n\n\n

Extruding the PEX Tubing<\/h2>\n\n\n\n

The process of making PEX pipe uses extrusion to form the polyethylene pellets into a continuous length of tubing:<\/p>\n\n\n\n

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  1. Plastic pellets get gravity-fed from overhead hoppers into the extruder barrel.<\/li>\n\n\n\n
  2. The extruder screw conveyor works the resin forward through heating zones, melting it into a viscous liquid.<\/li>\n\n\n\n
  3. The molten polyethylene gets forced through a die into the shape of the desired tubing.<\/li>\n\n\n\n
  4. Vacuum calibration maintains precise tubing dimensions as the plastic cools and hardens.<\/li>\n\n\n\n
  5. Haul-off tractors continue pulling the new pipe forward through cooling troughs.<\/li>\n\n\n\n
  6. The cooled PEX tubing gets coiled onto large spools or cut into straight lengths.<\/li>\n<\/ol>\n\n\n\n

    This automated process forms polyethylene resin into continuous PEX tubing up to 2500 feet per minute.<\/p>\n\n\n\n

    Crosslinking the Polyethylene<\/h2>\n\n\n\n

    The manufactured tubing is still just polyethylene at this point. To impart the enhanced properties needed for pressurized piping systems, it undergoes crosslinking:<\/p>\n\n\n\n

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    1. The base polyethylene tubing passes through a crosslinking chamber.<\/li>\n\n\n\n
    2. Powerful radiation bombards the tubing, altering the molecular structure of the polymer chains.<\/li>\n\n\n\n
    3. Chemical crosslinks form between the long polyethylene molecules.<\/li>\n\n\n\n
    4. This converts the tubing into crosslinked polyethylene (PEX).<\/li>\n\n\n\n
    5. Crosslinking improves temperature, pressure, and flexibility capabilities.<\/li>\n<\/ol>\n\n\n\n

      The most common radiation method used is electron beam processing. It instantly crosslinks the entire thickness of the pipe wall in a precisely controlled manner.<\/p>\n\n\n\n

      After cross-linking, the enhanced PEX tubing moves to the testing and quality assurance steps.<\/p>\n\n\n\n

      Tests et assurance qualit\u00e9<\/h2>\n\n\n\n

      To confirm performance expectations, PEX tubing undergoes a battery of stringent tests:<\/p>\n\n\n\n