Continuous PUR Spray PE Wrapping Pre-Insulated Pipe Production Line for District Heating

Huashida's independently developed patented PUR spray PE wrapping pre-insulated pipe production line adopts continuous polyurethane spray-foaming and PE-wrapping technology to manufacture large-diameter insulated steel pipes ranging from 508-1620mm. This turnkey equipment is specially engineered for industrial pipeline thermal-insulation applications.

Backed by multiple national utility patents and third party certified Level-5 technology rating, this line holds the highest independent technical verification for pre-insulated pipe production machinery in China, plus the honor of Shandong Province First Set of Technical Equipment.

As a complete patented turnkey system, it integrates three core production modules: external pipe Sa2.5 shot blasting & derusting line, continuous polyurethane spray foaming unit, and PE wrap winding production line.

• Industrial Pipeline Thermal Insulation: ≥88% closed-cell PUR foam maintains process fluid temperature and minimizes heat loss
• Oil Gas Transmission Pipeline Insulation: Preserves oil viscosity and reduces heat loss across long distance pipelines
• Chilled Water Distribution Networks: ≤0.05% water absorption rate blocks moisture ingress and prevents insulation degradation
• Chemical Fluid Transport Pipelines: Delivers stable thermal insulation and corrosion protection
• District Heating & Hot Medium Transport: Working temperature ≤120°C (peak ≤140°C), medium pressure ≤2.5MPa
• Direct Buried, Trench & Overhead Industrial Pipeline Installation: Trinity structure provides integrated corrosion resistance and thermal insulation

• National Patented & High Level Technology Certification: Multiple national utility patents and Level-5 technology rating
• High-Quality PUR Spray Foaming Performance: ≥88% closed cell ratio and ≤0.05% water absorption
• Broad Industrial Pipeline Application Coverage: Designed for oil gas transmission, chilled water distribution, and chemical fluid transport
• High Capacity Production Output: 3-4 units per hour for large diameter 508-1620mm pre-insulated pipes
• Stable Trinity Molding Structure: One-time synchronous forming eliminates delamination risk

• Steel pipe surface shot blasting & derusting (Sa2.5 international cleanliness standard)
• Medium frequency induction preheating with precision temperature control
• Uniform continuous polyurethane spray foaming with customizable thickness from 3-100mm
• HDPE strip wrapping over PU foam layer to form protective PE outer casing
• Finished pipe end trimming and quality inspection

Complies with EN253, GB/T29047, CJ/T114 international pre-insulated pipe standards.

Founded in 2003, Qingdao Huashida Machinery Co., Ltd. holds over 21 years of professional manufacturing experience in patented PUR spray PE wrapping pre-insulated pipe production lines, industrial pipeline thermal insulation equipment, and oil gas pipeline insulation systems.

We maintain long-term technical cooperation with Beijing University of Chemical Technology, Qingdao University of Technology and other national research institutions. Huashida Machinery ranks among China's top-3 pipeline equipment manufacturers.

Our high quality patented systems are trusted by global clients and exported to Saudi Arabia, Kazakhstan, Uzbekistan, UAE, Turkey, Russia and more than 60 countries and regions.