Qingdao Huashida's large-diameter hollow-wall winding pipe equipment is one of the earliest HDPE hollow-wall winding pipe production lines developed and manufactured in China. With strong technical capabilities and extensive experience in installation, commissioning, and production, the equipment can produce both hollow-wall winding pipes and antistatic gas-extraction pipes for mining applications.

Using specialized fittings (electrofusion belts and heat-shrink sleeves), the pipeline system offers easy connection, reliable performance, and economical construction. The pipes are hot-wound from high-density polyethylene with an I-beam-structured wall, delivering steel-like strength while maintaining the flexibility of plastic.

• Pipe Diameter: 300-1200 mm
• Applications: Municipal sewer and drainage systems; replacement for concrete and cast-iron pipes

The system uses a PE/PP single-screw extruder. The feeding section of the extrusion unit is equipped with forced water cooling and a grooved barrel, significantly reducing the power consumption of the main drive motor. The extruder features a large L/D ratio screw (30-38:1), offering strong material adaptability and excellent plasticizing performance. For customers using recycled materials or adding calcium carbonate, specially designed screws can be customized upon request.

Equipped with a composite die head, the machine forms pipes through spiral rotation. With a compact structure and unique design, it ensures high-quality products.

High-quality workmanship and compact design with stable transmission.

Professional PLC control system with intelligent centralized operation.

• High ring stiffness and external-pressure resistance
• Lightweight yet high impact strength
• Resistant to acids, alkalis and salts
• Service life ≈ 50 years

• Dual-extruder co-extrusion: square pipe + adhesive melt
• Multi-axis drive winding box for stable operation
• Composite die head for rotary forming
• Saw cut to length, synchronized PLC touch-screen control

• Vacuum loader
• Hopper dryer
• High-efficiency single-screw extruder + square-profile die
• Vacuum calibration tank
• Spray cooling tank
• Haul-off unit

• High-efficiency single-screw extruder (adhesive melt)
• Spiral winding unit
• Saw cutter
• Stacker
• PLC control system

Qingdao Huashida Machinery Co., Ltd. is a specialized manufacturer engaged in the development and production of plastic pipe machinery, municipal pipe equipment, pipe insulation and anti-corrosion systems, as well as pipe jointing and anti-corrosion materials.

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• Rigid Pre-insulated Pipe Production Line
• Flexible PERT Pre-insulated Pipe Production Line
• Steel Pipe Anti-corrosion Coating Line for FBE, 2LPE, and 3LPE coatings
• Steel Pipe Surface Derusting (Shot Blasting) Line
• PE Pressure Pipe / Water and Gas Supply Pipe Extrusion Line
• PP/PE Plastic Sheet, Board, and Geomembrane Production Line
• NBR/PVC Thermal Insulation Tube and Sheet Production Line

• Heat Shrink Joint Coating Sleeves
• Electrofusion Weldable Joint Sleeves
• Portable Plastic Welding Guns (Extruders)
• PE/PP Welding Rods