This production line utilizes a one-step process to continuously accomplish the extrusion of PERT pipes, polyurethane foaming and curing, corrugated forming, and online HDPE jacket coating. It is capable of producing soft or hard polyurethane foam-insulated pipes with pipe diameters ranging from 20 to 250 mm, making it suitable for the manufacture of insulated pipes in applications such as heating networks.

The flexible thermal pre-insulated pipe produced by this equipment is light in weight and can be rolled up. It has the characteristics of convenient transportation and construction, less joints and good toughness. It is especially suitable for the secondary pipe network of central heating and is a good substitute for buried pre-insulated steel pipes.

PE-RTII insulation pipe



√ PERT II Pipes Can Tolerate Temperatures of 110°C
√ Pipeline smooth, no impurities, no pollution
√ Heating companies can realize unattended, automated operation
√ Low temperature heating
√ 60 °C supply water 45 °C backwater to meet the heating demand.
√ The construction is simple and convenient, and the excavation amount is 40%
√ Greatly reduce construction costs

It saves the raw materials for using PE-RT II pipe.
Example: Level 2 design pressure: 10 Bar; for cold and hot water transfer in buildings
Selection of different material pipes: the highest PE-RTIIS value; the thinnest wall thickness
Compared to PERT I, PERT II can reduce material use by 15%
Relative to PP-R, PERT II can reduce material use by 30%
Note: According to relevant Chinese national standards and draft

√ Significantly reduce production cost
√ High degree of automation
√ Continuous production avoids restrictions on the length of the pipe
√ Flexible pre-insulated pipe can be directly buried underground, requiring smaller trenches
√ Excellent mechanical properties
√ The pre-insulated pipe is airtight and impermeable,anti-chemicaland corrosion,and the inner pipe is free from oxidation
√ The pipe can be rolled and transported in rolls, needs less pipe connectors,reduces construction costs, avoids a lot of trouble in the construction

Equipment composition

-- Production line for inner pressure pipe (PERT, PEX)
-- Inner pipe unwinding device
-- Pipe feeding device
-- Conveyor
-- Pipe centering device
-- Preheating and temperature control
-- Film feeding device
-- High-precision foaming machine
-- Forming machine with temperature control
-- Extruder for casing pipe and water cooling
-- Pull-off device
-- Winding machine

Process Flow
Up carrier pipe--pulling up to line--pipe catching connect--transport forward---put into seal &cover film device--foaming--foam curing ---PE cover extruding--vacuum sorb -- spray cooling--checking splice--cutting splice--off-pipe--down off pipe

Detailed photos

Huashida's continuous PERT flexible insulated pipe pipes are ideal for a wide range of applications, including district heating, cooling systems, oil and gas pipelines, and industrial piping. Their superior insulation, anti-corrosion properties, and long service life make them the preferred choice for modern, sustainable piping systems.

1. company profile

Qingdao Huashida Machinery Co., Ltd. is located in Qingdao High & New Technology Industrial Area- Qingdao Huashida industrial Park, covers an area of about 4000 square meters. We have tens of years experience in plastic pipe, sheet, and board extrusion lines, and pipe joints and welding tools such as heat shrinkable sleeve, Electro fusion sleeve etc.

2. main products

Our main products include as following,HDPE PU pre-insulation Jacket Pipe extrusion line,3PE steel pipe anticorrosion&coating machinery,Rubber&plastic foam flexible insulation tube/sheet production line,HDPE water supplying pipe extrusion line,PE PP sheet board extrusion line,Heat shrinkable sleeve production line,Hollow wall spiral pipe production line,Plastic welding rod extrusion line,Radiation cross-linked PE heat shrinkable sleeve,Electro fusion tape,Portable extrusion welder.

Our machines make products what are widely used as jacket pipe of PU foam insulation pipe in municipal heating pipe system; Municipal water supplying and drainage pipeline; Oil and gas pipeline; Pipe joints of plastic drainage water pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;
Besides manufacturing machines, we also make Heat shrinkable sleeves and electro fusion sleeves and plastic welders, which are widely used as pipe joints and sealings of plastic drainage water pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;

4. Our certificates and Patents

5. Global market
Our purpose is to supply highest cost-effective products and the most suitable solutions to our clients, as well as intimate help and service, on this basis we reach a win-win situation.
For over 14years We have exported to many foreign countries, such as Russia, Iran, Turkey, U. A. E, Sudan, Ukraine, Uzbekistan, Azerbaijan, South Asia, Poland etc.

6. Core Team

The guarantee period is 12 months from the date of installing, but no more than 14 months from the date of delivery. After this period we are obliged to provide with lifelong service at the expense of Buyer.During the warranty period we are responsible to provide trouble shootings and help the customer to solve the problems, provide spare parts which are broken, except breakings caused by the Buyer.We will provide the technical service train the workers from the buyers for free.We can also send technicians to the buyer's companies abroad for help installation and testing the lines. But the buyer shall pay for the round trip tickets, accommodation, transportation, medicine treatment and insurance of the technicians in foreign countries and some salary accordingly.