HDPE Hollow Wall Spiral Winding Pipe Production Line

As urbanization accelerates, a new type of pipe is quietly transforming the construction of underground urban pipelines. The HDPE hollow wall spiral winding pipe production line, as the core equipment for manufacturing this green building material, is gaining popularity in municipal engineering, industrial sewage disposal, agricultural irrigation, and other fields due to its unique technical advantages and environmental benefits.

Innovative Technology, Excellent Quality

The HDPE hollow wall spiral winding pipe production line adopts advanced winding technology to process high-density polyethylene (HDPE) raw materials into pipes with a hollow "I-beam" structure. The entire production process includes raw material preparation, extrusion melting, vacuum molding, cooling, winding, cutting, inspection, and other stages, each precisely controlled to ensure stable and reliable product quality .

Raw Material Preparation and Feeding​

Automated feeders transport HDPE raw materials from storage tanks to the primary extruder. The feeding speed is automatically adjusted based on the extruder’s output, and the extruder’s rotation speed is set according to the product specifications. To enhance oxidation and UV resistance, color masterbatch is added at a ratio of 150:1 and mixed uniformly before being fed into the extruder .

Extrusion Melting and Vacuum Molding​

During extrusion, the barrel temperature is set between 180°C and 220°C (adjustable based on material properties). The melted resin is then shaped into hollow rectangular profiles through a vacuum molding die at around 180°C before being transferred to the cooling stage .

Cooling and Winding Molding​

Cooling involves two methods: spray cooling to reduce the profile surface temperature to approximately 50°C, and natural cooling during transfer. The cooled profiles are wound onto molds of specified diameters. Simultaneously, a secondary extruder (operating at 170°C–200°C) injects molten resin (260°C) to fuse the profiles spirally, forming a continuous pipe .

Final Shaping and Inspection​

While the pipe is being wound and fused, spray water cools it to set the shape. An automatic cutting machine slices the pipe to predetermined lengths, and quality inspectors check dimensions (inner diameter, wall thickness, length), ring stiffness, and appearance against national standards. Qualified products are stored outdoors under protective covers to prevent UV damage .

Superior Performance, Wide Applications

HDPE hollow wall spiral winding pipes are lightweight, corrosion-resistant, and durable. Weighing only 1/8 of concrete pipes, they enable 50% faster installation. Their smooth inner surface reduces friction, increasing water flow capacity by 30%–50% compared to traditional pipes, allowing smaller diameters for equivalent flow rates and reducing project costs .

Key Features​

• Chemical Stability: Resistant to acids, alkalis, salts, wastewater, and soil corrosion .

• Impact Resistance: The "I-beam" structure provides flexibility and adaptability to various ground conditions .

• Aging Resistance: Designed to withstand UV exposure and maintain performance for over 50 years .

• Temperature Tolerance: Suitable for -50°C to 60°C environments without cracking or leakage .

• Lightweight: Easy to transport and install without heavy machinery .

• Leak-Free Joints: Electrofusion or thermal shrink bands ensure secure, seamless connections .

• Low Friction Coefficient: Inner wall roughness (N≈0.009–0.010) enhances flow efficiency .

Applications​

These pipes are ideal for transporting fluids below 45°C in:

• Municipal Projects: Underground drainage and sewage systems .

• Road Engineering: Drainage for railways and highways .

• Industrial Use: Industrial wastewater pipelines .

• Construction: Building rainwater and ventilation pipes .

• Landfill Sites: Sewage collection pipes .

• Water Conservancy: Water supply and irrigation pipelines .

• Agriculture: Drainage for farmland, orchards, and forests .

• Telecommunications: Conduits for cables and optical fibers .

• Sports Fields: Drainage for golf courses and stadiums