Welcome to Qingdao Huashida Machinery Co., Ltd.

Plastic Extrusion & Anticorrosion Thermal Insulation Pipe MACHINERY MANUFACTURER

HDPE Jacket Extrusion Line for PU Foaming Pre-insulated Pipe



Buried pre-insulated pipe is made of carrier pipe (steel/stainless steel/plastic/copper) and polyurethane rigid foam Material (insulation layer), high density polyethylene outer casing (outer sheath).

Because of its low heat loss, good anti-corrosion and insulation performance, fast and safe construction and other advantages, it is widely used in liquid and gas transmission network, central heating network, municipal construction engineering and other fields. It is an important infrastructure and "lifeline" to ensure the safe and efficient operation of the city, and is recognized as an environmental protection and energy-saving product.

  PU Foaming Pre-insulated Pipe Production process Flow:

The production process of "pipe in pipe" (PU Foaming Pre-insulated Pipe) mainly includes three steps: surface pretreatment of steel pipe, production of HDPE outer protective pipe and production of insulation layer.

The production steps of insulation layer are as follows: firstly, the steel pipe is penetrated into the high-density polyethylene outer protection pipe to form a casing structure, and the supports are evenly arranged in the annular space between the steel pipe and the high-density polyethylene outer protection pipe, and the two ends are sealed by flanges; secondly, the casing is hoisted on the foaming platform, and the polyurethane foaming material is injected into the casing by high-pressure foaming machine; finally, the polyurethane material is foamed After curing, the sealing structure at both ends is removed to complete the production process of the insulation layer.

         HDPE Jacket Process Flow: 

 Vacuum feeding PE granule-->hot air dry material-->extrusion plasticizing-->mold shaping-->Vacuum    sizing-->water cooling-->Pulling out-->cutting pipe-->carrier laying-off pipe

                           Composition of Equipments:

               1.hopper dryer ⒉ Single Screw Extruder ⒊ extrusion mould die ⒋ Head bracket ⒌ Vacuum calibration device ⒏ Water cooling tank  ⒐ haul-off  ⒑ Planetary cutting machine  11.Pipe bracket  ⒓. Loader 13. PLC



   Efficient single screw extruder with water-cooling force feeding system, and barrel with grooving in the feeding zone are designed to save power of main motor; Long L/D ratio and mixing head are designed to get perfect jellification and high output. 

     Die head 
      Flow channel is specially treated to have better wear-resisting; spiral die head increases extrusion pressure to improve quality of pipe. 


     Vacuum Calibration Tank 

      It adopts bronze or stainless steel calibrators; High-efficiency water-spraying cooling to ensure quality of pipes. 

     Hauling machine 
      High qualified rubber block is with longer life, we dont accept blocks made by recycled materials. Hauling speed is synchronized with extruder. 

     Planetary cutting machine 
      High qualified alloy steel blade; planetary cutting to get smooth edge; High cutting precision; PLC controlling. 

Technical parameter

ModelExtruderPipe SizeExtrusion capacityTotal installed powerLength

                          Delivery Loading




Environmental protection, energy conservation and emission reduction!Low energy consumption, high output, low scrap rate, saving materials and time!
Professional team for your service, detailed pre-sales technical consultation and perfect after-sales service to solve your worries. The seller would send technician to the buyer's factory to help installing and test the new machine and train people of the buyer.
12 months from date of Bill of Lading.During this period, the seller will provide free service for all problems caused by quality of equipments, however except the problems caused by the buyer because of wrong operation. 
Pre-sales and after-sales technical supportcustomer hotline0086-532-80999083

Global SupplierHuashida Machinery, with over 15 years' experience, is one of the professional hdpe pu thermal insulation jacket pipe extrusion production machine line manufacturers in China. Offering the customized service, we warmly welcome you to purchase the high qualified products from our factory.


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