Polypropylene Random Copolymer Pipe Material
Overview
Polypropylene Random Copolymer (PP-R) Pipe Material is a thermoplastic polymer engineered for piping systems requiring high temperature and pressure resistance. Developed as an improvement over homopolymer polypropylene, its random copolymer structure enhances impact strength and thermal stability. PP-R is classified under ISO 15874 for plastic piping systems and is widely adopted in Europe and Asia for potable water distribution. Its molecular structure balances flexibility and rigidity, making it suitable for both residential and industrial applications.
Physical and Chemical Properties
PP-R exhibits a density range of 0.89-0.91 g/cm³, significantly lower than metal pipes, reducing installation weight. Its melting point (130-170°C) allows continuous operation at 70°C with peak tolerance up to 95°C, ideal for hot water systems. The material demonstrates exceptional chemical resistance to acids, alkalis, and salts, minimizing corrosion risks. Unlike PVC, PP-R contains no plasticizers, ensuring long-term stability. Its thermal conductivity (0.22 W/m·K) is approximately 1/300th of copper, reducing heat loss in heating applications.
Main Applications
Primary use cases include potable water systems (cold and hot), where PP-R's non-toxicity and smooth inner surface prevent bacterial growth and scale accumulation. Industrial applications cover chemical transport, compressed air systems, and food processing pipelines. In radiant floor heating systems, PP-R pipes distribute heat evenly due to their thermal properties. The material's weldability enables seamless jointing through thermal fusion, creating leak-free systems superior to threaded metal connections.
Safety and Storage
PP-R is classified as non-hazardous under GHS standards. Processing at temperatures above 200°C may release volatile compounds requiring ventilation. Raw material should be stored in moisture-proof packaging at <40°C to prevent oxidation. Pre-drying at 80°C for 2-4 hours is recommended before extrusion to eliminate moisture absorption. Finished pipes must be protected from UV exposure during outdoor storage, as prolonged sunlight can degrade mechanical properties.
B2B Procurement Guide
Key specifications to verify include ISO 15874 compliance, pressure rating (PN10-PN25), and SDR (Standard Dimension Ratio) values. For drinking water applications, ensure NSF/ANSI 61 certification. Bulk purchases (20+ metric tons) typically attract 8-12% discounts. Leading manufacturers include Borealis, SABIC, and localized Asian producers. MOQs generally start at 5 tons with lead times of 2-4 weeks. Sample testing for melt flow index (MFI 0.25-0.35 g/10min at 230°C/2.16kg) and hydrostatic pressure resistance is advisable.
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