The Huashida HDPE Structured Double Wall Corrugated Spiral Pipe Production Line is an advanced engineering solution for manufacturing heavy-duty Weholite and hollow-wall corrugated pipes. Designed for high-density polyethylene (HDPE), this line produces pipes with a unique I-Beam structured wall that offers an exceptional strength-to-weight ratio and high ring stiffness.

As an ideal replacement for traditional cement and cast iron pipes, the resulting structured wall spiral pipes provide up to 50 years of service life. These systems are specifically engineered for municipal sewage, large-scale drainage, and industrial wastewater networks, offering superior resistance to chemical corrosion (acids, alkalis, and salts) and external load pressure.

• Advanced Weholite Technology: Unique hollow-structured wall design ensures high impact resistance and lightweight handling.
• Extreme Durability: Excellent creep resistance and chemical stability for underground environments.
• Large-Diameter Capacity: Capable of producing pipes from Ø200mm to Ø3000mm.
• Economical Construction: Low installation costs and easy connection methods compared to traditional materials.
• Smart Automation: Integrated PLC control system for precision manufacturing and high operational safety.

Our hollow-wall extrusion line utilizes a two-part synchronized process to ensure structural integrity:

1. Profile Extrusion: Raw Material → Vacuum Feeding → Single Screw Extrusion → Vacuum Calibration → Spray Cooling → Traction.
2. Spiral Winding & Welding: Profile Pipe → Single Screw Glue Extrusion → Spiral Winding & Forming → Water Cooling → Precision Cutting → Inspection & Packing.

This turnkey production plant consists of two specialized units:

• Part 1: Profile Extrusion Line: Includes high-torque single screw extruder, square tube die heads, vacuum calibration table, and haul-off unit.
• Part 2: Spiral Forming Unit: Includes a secondary melt-adhesive extruder, a Rewinding Forming Machine, and an automated PLC-controlled cutting system.
• Control System: Full PLC integration for synchronized operation between the profile extruder and winding unit.

The HDPE Structured Wall Spiral Pipe is the gold standard for modern infrastructure:

• Municipal Engineering: Urban sewage and stormwater drainage systems.
• Infrastructure: Large-diameter culverts and underground utility conduits.
• Industrial: Chemical fluid transportation and wastewater management.
• Retrofitting: Replacement of aging concrete and cast-iron pipeline networks.

Founded in 2003, Huashida Machinery is a global leader in plastic extrusion technology. With 70% of our production exported to Europe, America, and the Middle East, we provide certified (ISO/CE) solutions for:

• Anti-Corrosion Coating Lines (3LPE/FBE)
• Pre-Insulated Pipe Lines (HDPE Jacket)
• Geomembrane & Sheet Extrusion Systems
• Pipeline Joint Materials: Heat shrink sleeves and electro-fusion joints