The PEXA/PERT prefabricated insulated plastic piping system is a high-performance solution that combines cross-linked polyethylene (PEX-a) or PE-RT II service pipes with polyurethane (PU) insulation, and is widely used in modern construction and industrial applications.
The system is composed of three integrated layers:
1.Inner service pipe made of PEX-a or PE-RT II material
2.Polyurethane foam insulation layer
3.HDPE outer protective casing![]()
In contrast to conventional pipe-in-pipe batch foaming methods, where pipes are produced one by one, Huashida has developed a next-generation continuous production solution. This fully integrated line combines PU foam insulation with HDPE outer casing co-extrusion in a single, continuous process.
As a result, the system delivers up to 40% higher production efficiency, 30% lower energy consumption, and stable, high-quality output ensured by advanced automation and process control.
Fully compliant with EN 253, this revolutionary technology provides outstanding economic advantages for today's district heating and cooling infrastructure.
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| work/ shell tube dia. | work tube dia. | shell tube dia.and wall thickness |
| 20/78 | 20 | 78x 2.0 |
| 25/78 | 25 | 78x2.0 |
| 32/78 | 32 | 78х 2.0 |
| 40/93 | 40 | 93 х 2.2 |
| 50/113 | 50 | 113х 2,4 |
| 63/128 | 63 | 128 х 2,7 |
| 75/143 | 75 | 143 x 3,0 |
| 90/163 | 90 | 163 x 3.2 |
| 110/163 | 110 | 163 х 3,2 |
Qingdao Huashida Machinery Co., Ltd is one of the top manufacturers of plastic extrusion machines in China, specialized in dealing with Steel pipe in terms of anticorrosion and insulation technology, R&D of the coating technique, design and manufacture of the equipment for coating, products and materials, researching and development of plastic extrusion equipments, especially of Vacuum Calibrating method PE insulation jacket pipe extrusion line, and PE hollow wall spiral pipe production line, PE PP sheet extrusion line, and pipe joints and welding tools such as heat shrinkable sleeve, Electro fusion sleeve etc.
Up to now, We have successfully entered the oversea markets of Russia, Iran, UAE, India, Belarus, Kazakhstan and son on. Our pipeline production line is nearly 50sets at home and abroad.
HUASHIDA Factory located in Qingdao High & New Technology Industrial Area- Qingdao Huashida industrial Park, covers an area of about 4000 square meters. We have obtained more than 10patents and many industry certifications at home and abroad. HUASHIDA company has high qualified and experienced teams for reaching& designing, manufacturing and site operation.
We have reliable products of different models because of our powerful making capacity. We can satisfy our customer's special need because of our outstanding R&D and design capacity. We can offer our user with timely and convenient techniqual support because of our perfect after-sales service.![]()
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