PUR Spray PE Wrapping Pre-Insulated Steel Pipe Production Line for Oil Gas Chilled Water

Huashida's independently developed PUR spray PE pre-insulated pipe production line uses a continuous polyurethane spray foaming and PE wrapping process to manufacture large-diameter insulated steel pipes (508-1620mm) specifically engineered for oil gas pipeline thermal insulation and chilled water distribution networks - two demanding applications where standard pre-insulated pipe lines often fall short on foam density, closed-cell ratio, and long-term thermal stability.

As a complete turnkey PUR spray pre-insulated pipe system, this line integrates three core production sections into one matched, vendor-unified solution: an external pipe Sa2.5 shot blasting and derusting line, a continuous polyurethane spray foaming line, and a PE wrap winding production line - eliminating the need to source, integrate, or coordinate separate equipment for oil gas and chilled water pipeline insulation projects.

• Oil Gas Pipeline Thermal Insulation - the primary differentiating application of this line; stable ≥88% closed-cell PUR foam maintains oil viscosity and prevents heat loss over long-distance buried oil gas transmission pipelines where thermal performance degradation directly impacts operational efficiency
• Chilled Water Distribution Networks - ≤0.05% water absorption rate prevents moisture ingress and insulation degradation in district cooling and chilled water pipeline systems, where temperature differential between pipe medium and surrounding soil creates persistent condensation risk
• District Heating and Hot Medium Transport - operating temperature ≤120°C (peak ≤140°C); medium pressure ≤2.5MPa; suitable for municipal district heating networks and industrial hot medium pipeline systems
• Direct Burial, Trench, and Overhead Pipeline Installation - the trinity molding structure (steel + PU foam + HDPE PE casing) provides simultaneous corrosion resistance, mechanical protection, and thermal insulation for all installation environments

• Oil Gas & Chilled Water Specialist: Engineered for the demanding thermal stability and moisture resistance requirements of buried oil gas transmission and district cooling chilled water pipelines - where ≥88% closed-cell ratio and ≤0.05% water absorption are non-negotiable performance standards
• ≥88% Closed-Cell PUR Spray Foaming: Continuous PUR spray process delivers high closed-cell ratio, low water absorption, and stable long-term thermal conductivity across the full 508-1620mm large-diameter pipe range - critical for oil gas and chilled water pipeline insulation in harsh buried service conditions
• National Patented, Level 5 Technology Verified: Multiple national utility patents and a certified Level 5 technology rating - the highest independent technology verification available for pre-insulated pipe production line equipment in China - plus Shandong Province First Set of Technical Equipment honor
• 3-4 Units/Hour High Output: Processes large-diameter 508-1620mm pre-insulated pipes faster than standard single-station foaming lines - sustaining large-scale oil gas and chilled water pipeline project schedules without insulation-stage bottlenecks
• Trinity Molding Structure Integrity: One-time synchronous forming of steel carrier pipe, polyurethane foam insulation layer, and HDPE PE outer casing - ensuring dimensional consistency and eliminating delamination risk in long-term buried oil gas and chilled water pipeline service.

Founded in 2003, Qingdao Huashida Machinery Co., Ltd. has over 21 years of professional manufacturing experience in PUR spray PE pre-insulated pipe production lines, oil gas pipeline thermal insulation equipment, chilled water pipeline insulation systems, polyurethane foam pipe insulation machinery, 3PE anti-corrosion pipe production lines, large-diameter underground pipeline equipment, and plastic pipe fitting production machinery.

We maintain long-term technical cooperation with Beijing University of Chemical Technology, Qingdao University of Technology, and other national research institutions. By integrating advanced global technologies and international standards, Huashida Machinery has grown to become one of the top 3 manufacturers in China's pipeline equipment industry - with a proven track record across oil gas transmission, chilled water distribution, municipal district heating, and industrial pipeline infrastructure projects worldwide.

Our high-quality PUR spray pre-insulated pipe manufacturing systems - including dedicated configurations for oil gas pipeline thermal insulation and chilled water distribution networks - are trusted by global customers and exported to Saudi Arabia, Kazakhstan, Uzbekistan, the UAE, Turkey, Russia, and 60+ countries and regions worldwide.