Polyurethane Rigid Foam Pipe – Anti-condensation, Low-temperature Flame-retardant Pipe for Cold Storage & Central Air Conditioning
1. Product Overview
Polyurethane rigid foam pipe (PU pipe insulation) is a formula-designable polymer material, molded by high-density closed-cell integral foaming technology. It features ultra-low thermal conductivity, full waterproof and anti-condensation performance, excellent low-temperature resistance and aging resistance, with customizable B1/B2 flame retardant grades. It delivers far better thermal insulation and cold preservation efficiency than traditional rubber and rock wool pipes, widely applied in central air conditioning, cold storage, industrial electromechanical pipeline insulation and cold preservation projects.
2. Core Product Features
Ultra-low Thermal Conductivity & High Energy Saving
The closed-cell structure efficiently locks temperature and insulates heat, with a thermal conductivity of ≤0.022 W/(m·K) at room temperature. Its insulation performance outperforms traditional pipes, effectively reducing cooling and heat loss and delivering outstanding long-term energy-saving effects for high-standard pipeline insulation and cold preservation scenarios.
High Closed-cell Rate, Waterproof, Moisture-proof, Frost-resistant & Anti-condensation
With a closed-cell rate ≥95% and volume water absorption ≤3%, the product excels in waterproofing, moisture resistance and frost resistance. It fundamentally prevents pipeline condensation, dripping and mildew, withstands long-term freeze-thaw cycles in cold storage, and maintains stable performance without cracking or failure in harsh high-humidity and low-temperature environments.
Stable Structure & Strong Temperature Adaptability
Featuring a compressive strength of ≥150kPa (GB/T 8813), the compact structure has a low thermal expansion and contraction coefficient. It resists shrinkage and warping under alternating high and low temperatures, closely covering pipelines without hollowing or delamination for long-lasting stable insulation performance.
Aging & Weather Resistant with Long Service Life
Stable physical and chemical properties endow the pipe with UV resistance, oxidation resistance and mild acid-base corrosion resistance. It retains over 90% of its performance after QUV aging tests, resisting pulverization and cracking in outdoor and humid environments and serving much longer than ordinary insulation pipes.
Flexible Cutting & Adaptable to Special-shaped Fittings
Lightweight and easy to process, it can be freely cut and grooved to fit straight pipes, elbows, tees and other special-shaped fittings. Bonded and sealed with dedicated PU adhesive for tight fitting without dead angles, it enables efficient construction for various complex pipeline conditions.
Eco-friendly & Customizable B1 Flame-retardant Pipe
Made of fluorine-free and low-VOC eco-friendly raw materials with no dust or pollution, complying with green building standards. The standard grade is B2 flame retardant, and customizable B1 flame-retardant grade passes GB 8624 tests with low smoke and low toxicity, ensuring high safety for engineering applications.
3. Technical Specifications
Applicable Pipe Diameter: DN15～DN600 (approx. 1/2″-24″ inch size, suitable for steel pipes, PPR pipes, copper pipes, etc.)
Standard Wall Thickness: 20mm, 30mm, 40mm, 50mm (custom non-standard thickness available)
Standard Length: 2000mm per piece (custom cutting available)
Density: 35~60kg/m³
Thermal Conductivity: ≤0.022 W/(m·K) @ 25℃
Closed-cell Rate: ≥95%
Compressive Strength: ≥150kPa (GB/T 8813)
Volume Water Absorption: ≤3%
Flame Retardant Grade: Standard B2 grade, customizable B1 grade (GB 8624)
Operating Temperature: -50℃～+120℃
4. Material Selection Guide & Competitor Comparison
Featuring ultra-low cold preservation, full waterproof performance and dust-free advantages, this product is ideal for high-standard scenarios such as cold storage low-temperature pipelines, central air conditioning systems and high-humidity basements. Compared with rubber pipes, it provides better insulation, waterproofing and low-temperature stability; compared with rock wool pipes, it enables cleaner construction and avoids moisture failure. Applicable for -50℃～+120℃, not suitable for high-temperature steam pipelines.
5. Main Application Scenarios
Central Air Conditioning Insulation Pipe | HVAC Pipeline Insulation
Specially designed for central air conditioning cooling, heating and refrigerant pipelines. It reduces cold and heat loss, eliminates pipeline condensation and dripping, stabilizes equipment operation and cuts energy consumption for commercial and civil HVAC projects.
Cold Storage Insulation Pipe | Low-temperature Cold Chain Pipeline Insulation
Suitable for low-temperature pipelines in cold chain warehouses and quick-freezing workshops. Match it with Color Steel Polyurethane Sandwich Panel to build a complete cold storage insulation system. It remains tough and non-absorbent at -50℃, resists freeze-thaw damage and maintains stable cold preservation, meeting high-standard insulation demands for food and pharmaceutical cold chain projects.
Industrial Chemical Process Pipelines
Applicable to low-temperature process pipelines, LNG supporting pipelines and equipment circulation pipelines in chemical and new energy industries. It stabilizes medium temperature, resists mild acid and alkali corrosion, and provides moisture and aging resistance for industrial constant temperature insulation.
Mechanical & Plumbing Pipeline Insulation
Suitable for concealed cold and hot water pipelines in basements, kitchens and bathrooms. It achieves anti-freezing, moisture-proof, anti-condensation and noise reduction effects, preventing pipeline cracking and dripping to improve overall mechanical and electrical engineering quality.
Clean & Special Engineering Pipelines
Adopts dust-free and eco-friendly formula, suitable for clean projects such as pharmaceutical workshops, food factories and constant-temperature laboratories. No harmful volatiles, fully meeting environmental protection and acceptance standards for high-end clean spaces.
6. Installation Guidelines
Bonding Construction: Apply special adhesive evenly, dry appropriately and press tightly for seamless sealing.
Special-shaped Fitting Construction: Precisely cut for elbows and tees, fill gaps with foam sealant to eliminate insulation dead angles.
Cutting Requirements: Cut with fine-tooth saw or electric hot wire cutter to ensure flat and closed cuts and protect closed-cell structure.
Safety Specifications: No open fire on construction sites; reserve standard fire spacing for B2-grade pipes during installation.
7. Packaging & Purchasing Information
Packaging: PE dust-proof film + woven bag packaging; carton reinforcement available for export orders, suitable for long-distance land and sea transportation.
Stock & Customization: Factory direct supply, standard specifications in stock for bulk procurement and mixed batch delivery; customized B1 flame-retardant grade, non-standard pipe diameter and wall thickness supported.
Delivery Time: 3-5 days for in-stock orders; 15-20 days for customized orders, adjustable according to project volume.
Supporting Services: Provide complete factory inspection and flame retardant certification documents, as well as professional free construction technical guidance.
Warranty: Under standard working conditions and standardized construction, all product performances remain stable long-term, effectively reducing later operation and maintenance costs.
8. FAQ
Q1: How to choose between PU insulation pipe and rubber insulation pipe?
A1: Choose PU pipes for cold storage and high-humidity anti-condensation scenarios; choose rubber pipes for cost-effective insulation in dry conventional pipelines.
Q2: Can PU insulation pipes be used outdoors or buried underground?
A2: Bare pipes are not recommended for direct outdoor exposure or burial. Outdoor use requires aluminum protection layer, and buried use needs PE jacket protection.
Q3: Is B1 flame-retardant grade available?
A3: Yes. Standard is B2 grade, customized national standard B1 flame-retardant grade is available to meet various fire acceptance requirements.
Q4: Can it be used for high-temperature steam pipelines above 120℃?
A4: No. The applicable temperature range is -50℃～+120℃. Rock wool pipes are recommended for high-temperature steam pipelines.
Q5: Are non-standard pipe diameters and special thicknesses customizable?
A5: Full non-standard customization is supported. On-site cutting is also available to adapt to various special-shaped pipelines.
9. Product Summary
PU polyurethane rigid foam pipe features core advantages of ultra-low thermal conductivity, full waterproof anti-condensation and dust-free environmental protection, with superior energy-saving performance over traditional insulation pipes. With frost resistance, flame retardancy and convenient installation, it adapts to cold storage, central air conditioning, industrial electromechanical and other scenarios, serving as the preferred polymer material for pipeline energy-saving insulation projects.
