Fully Automatic Vacuum-Calibrated Insulated Pipe Production Line

Redefine your insulation manufacturing efficiency. This cutting-edge HDPE Jacket Pipe Extrusion Line, engineered by Qingdao Huashida Machinery Co., LTD, represents the pinnacle of pre-insulated pipe technology. By utilizing advanced vacuum calibration, this line produces pipes with superior stiffness, unmatched pressure resistance, and a flawless surface finish.

Core Technical Advantages: Why Vacuum Calibration?

Compared to traditional internal pressure methods, our vacuum calibration system offers:

1. Enhanced Stiffness: Ensures structural integrity for large-diameter pipes under high soil pressure.

2. Superior Surface Finish: Delivers an impeccably smooth exterior, reducing friction and enhancing aesthetics.

3. High Automation: Seamlessly integrates the entire process from raw material to finished stack.

4. Extended Service Life: Robust mechanical design ensures 24/7 industrial stability with minimal maintenance.

Technical Parameters

Production Process Flow

I. HDPE Jacket Extrusion Journey

1. Vacuum Feeding: Automatic transport of PE granules to eliminate manual contamination.

2. Hot Air Drying: Ensures material purity and prevents bubbles in the pipe wall.

3. Plasticizing Extrusion: High-efficiency melting via our SJ-series single screw extruders.

4. Vacuum Sizing & Cooling: Precise shaping within vacuum tanks followed by rapid water solidification.

5. Precision Cutting: Pipes are automatically cut to length and moved to the stacking area.

II. PU Foaming "Pipe-in-Pipe" Process

1. Surface Pretreatment: Steel pipes are cleaned to ensure maximum bonding with insulation.

2. Casing Assembly: The steel pipe is inserted into the HDPE jacket using centered supports.

3. Sealing: Both ends are secured with flanges to prepare for injection.

4. High-Pressure Foaming: Advanced PU material is injected into the annular space.

5. Curing & Finishing: The assembly is cured, seals are removed, and the insulated pipe is ready for dispatch.

Main Equipment List

1. Hopper Dryer: Optimized moisture removal for superior material processing.

2. Single Screw Extruder: High-torque design for consistent and massive output.

3. Extrusion Mould Die: Precision-engineered for uniform wall thickness.

4. Head Bracket: Heavy-duty support ensuring stability during high-speed extrusion.

5. Vacuum Calibration Device: The core technology for achieving industry-leading pipe dimensions.

6. Water Cooling Tank: Multi-stage cooling system to maintain pipe integrity.

7. Haul-off Unit: Synchronized pulling for consistent pipe thickness and speed.

8. Planetary Cutting Machine: Delivers burr-free, high-precision cuts for all pipe sizes.

9. Automatic Loader: Streamlines material handling and reduces labor intensity.

10. PLC Control System: Smart automation for real-time monitoring and data management.

11. Pipe Stacking Bracket: Robust support for organized final product handling.

About Qingdao Huashida Machinery

Established in 2003, Qingdao Huashida is a global leader in plastic extrusion technology:

1. Innovation Power: Holder of over 30 technical patents and developer of national-standard equipment.

2. Quality Assurance: Fully certified with ISO 9001, ISO 14001, CE, SGS, and DVGW.

3. Global Collaboration: Technical partnerships with Tsinghua University and other top-tier research institutes.

4. Expert Team: Over 70 professionals, including 10+ senior engineers, operating from a 4,000 sqm facility.

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.