Continuous polyurethane spraying thermal winding polyethylene equipment production line

The "Polyurethane-Sprayed, Polyethylene-Wrapped Prefabricated Buried Insulation Pipe" is constructed from three integral components: a robust working steel pipe, a meticulously sprayed polyurethane insulation layer, and a durable extruded polyethylene outer protective layer. During the production process, the thickness of both the insulation layer and the outer protective layer can be precisely adjusted within a defined range to meet specific project requirements. Quantitative production is meticulously tailored based on the parameters of the medium used in centralized heating and cooling systems, as well as the required insulation layer thickness to effectively manage heat dissipation losses, thereby ensuring optimal performance and satisfaction for diverse projects.

Before construction, it is necessary to fully understand the construction site, such as length, diameter, curvature, angle, etc., in order to select the appropriate spraying equipment. At the same time, it is necessary to understand the temperature, humidity, wind direction, etc. of the construction environment to determine the meteorological conditions during construction.

Before the operation, equipment such as spray guns, compressed air, mixers, etc. need to be prepared. In addition, the polyurethane materials, diluents, catalysts, etc. used need to be prepared and mixed in the correct proportion. Primer treatment is required first to ensure that it can adhere firmly to the surface of the pipe. The color of the primer needs to match the insulation material used. Before the operation, the equipment needs to be debugged to ensure its normal operation. Then, start the operation according to the pre-planned spraying route, ensure uniform thickness, and avoid missing coating, re-coating, etc. After the spraying operation is completed, post-processing is required. For example, the sprayed material needs to be dried to ensure that it is completely cured. At the same time, the sprayed surface needs to be scrubbed and cleaned to make it smooth and pollution-free.

Qingdao Huashida Machinery Co., Ltd. is a comprehensive private high-tech enterprise integrating R&D, manufacturing, marketing, service, and trade. Established in 2003, the company is located in the High-Tech Industrial Park of Qingdao. The company covers an area of about 4,000 square meters and employs 70 professionals. It has two main production facilities: one for pipe-making production lines and the other for pipeline plastic joints.

Product Specification Table

TECHNICAL PARAMETER
The spray coating and winding process for polyurethane insulation pipe products offers several key advantages: • Enhances the mechanical properties of the outer protective tube.
• Thins the wall of the outer protective tube.
• Lowers the water absorption rate of the insulation layer.
• Increases the closed cell rate of the insulation layer.
• Decreases the eccentricity of the insulation pipe axis.
• Improves the uniformity of the overall insulation layer density throughout the pipeline.
• Boosts the compressive strength of the insulation layer.
• Reduces the thermal conductivity of the insulation layer, thereby minimizing energy loss.

Production process
flow chart Steel pipe External shot blasting ----> PU foam spraying----> PE film wrapping----> water cooling---->cutting down pipeline---->trim end of pipe---->printing mark&loading down finished pipe---->sealing end of pipe
Main equipment External shot blasting and rust removal operation line
Chuck type spraying operation line
PU Thermal insulation layer winding production line

Our Advantages
Qingdao Huashida Machinery Co., Ltd was established in 2003 and has focused on plastic pipe production line, 3LPE anti-corrosion processing line and joints of plastic pipes & 2PE 3PE pipes for over 15 years, we are private high-tech enterprises integrated by R&D, manufacturing, selling, service and trading. We are always concentrating on research and development of plastic extrusion equipments, tightly cooperating with Tsinghua University, Beijing University of chemical technology, South China university of technology and some other colleges and scientific research institutions. Meanwhile, by absorbing advanced technology home and abroad, we have been one of the top manufacturers of plastic extrusion machines in China, especially of PE insulation jacket pipe extrusion line, 3PE anti-corrosion processing line, and PE hollow wall spiral pipe production line. Company Profile Established in 2003, Qingdao Huashida Machinery Co., Ltd. is a leading private high-tech enterprise dedicated to the integrated operations of R&D, manufacturing, sales, service, and trading. Our factory spans an area of approximately 4,000 square meters and employs 70 skilled professionals. We operate two main production facilities: one specializing in pipe-making production lines and the other in pipeline plastic joints. Our technical prowess is underpinned by a team of over 10 engineers and two state-of-the-art detection and control testing laboratories. Our commitment to innovation has earned us more than 30 technical patents, as well as certifications such as ISO 9001 for quality management, ISO 14001 for environmental management, SGS, DVGW, and CE. Qingdao Huashida Machinery Co., Ltd. is deeply committed to the research and development of plastic extrusion equipment. We maintain close collaborations with prestigious institutions such as Tsinghua University, Beijing University of Chemical Technology, and South China University of Technology. By continuously absorbing advanced technologies both domestically and internationally, we have positioned ourselves as one of China's top manufacturers of plastic extrusion machines. We excel particularly in the production of PE insulation jacket pipe extrusion lines, 3PE anti-corrosion processing lines, and PE hollow wall spiral pipe production lines.

Huashida Machinery is committed to the research and development of plastic extrusion equipment. It collaborates closely with prestigious institutions such as Tsinghua University, Beijing University of Chemical Technology, and South China University of Technology. By absorbing advanced technologies both domestically and internationally, the company has positioned itself as one of China's top manufacturers of plastic extrusion machines. It specializes in producing PE insulation jacket pipe extrusion lines, 3PE anti-corrosion processing lines, and PE hollow wall spiral pipe production lines.

The company has a technical team of over 10 engineers and two state-of-the-art detection and control testing laboratories. It has obtained more than 30 technical patents and holds certifications such as ISO 9001 for quality management, ISO 14001 for environmental management, SGS, DVGW, and CE.

After Sales Service
We have a professional after-sales team. After purchasing the product, our engineers will arrive at the factory in the customer's country to provide guidance on equipment installation and commissioning.

1. Our Factory

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. Our 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

3. Our products Application.

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. Our Purpose and 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. Guarantee and after service

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.