What are the characteristics of PSP steel-plastic composite pipes?
1. Excellent Mechanical Strength: Offers high strength, rigidity, and impact resistance with stable pressure-bearing performance; its tensile strength ranges from 275 to 320 MPa, which is 7 to 8 times that of pure plastic pipes.
Thermal Conductivity: The thermal conductivity ranges from 0.46 to 0.57 W/m.k, approximately 1/100th that of steel pipes, and close to that of plastic pipes.
3. Low Coefficient of Thermal Expansion: Possesses similar anti-creep properties to steel pipes, allowing buried pipes to withstand significant external pressure; the linear coefficient of thermal expansion is 1.2×10^-5/C, which is 1/10 to 1/12 of that of pure plastic pipes. 4. Hydraulic Performance: The inner surface roughness of the PSP steel-plastic composite pipe is 0.007mm, ensuring a smooth inner surface. This results in minimal frictional losses during fluid transportation, no scaling, and a structure that combines rigidity and flexibility. It can quickly dissipate pressure surges within the pipeline system without generating water hammer noise. The smooth pipe wall reduces flow resistance and scaling, leading to a 30% lower head loss compared to metal pipes under the same diameter and pressure conditions.
5. Corrosion Resistance: The installation requires no anticorrosive treatment, saving on engineering costs. The steel-plastic composite pressure pipe's inner and outer layers of polyethylene are non-polar materials with stable chemical properties. They are insoluble in any known solvent at room temperature and resistant to corrosion by various acidic, alkaline, and salt solutions.
6. Sanitary Performance: PSP steel-plastic composite pipes are hygienic and meet the standards.
7. Tracability: Can be traced using magnetic metal detectors without the need for additional tracking or protective markings, thus avoiding excavation-related damage and facilitating rapid repairs and maintenance. 8. Lifespan: Can be used for several years within the normal temperature and pressure range, offering a long service life.
9. Hot Melt Connection: The connecting components for PSP steel-plastic composite pipes feature hot melt connections, offering superior pressure-bearing and corrosion-resistant capabilities compared to the pipes themselves. They are easy to install and provide excellent sealing performance.
10. The temperature range is very broad, with the hot water pipe usable between -10°C and 90°C.
11. Lightweight for easy transportation and storage.
12. Low pollution, showcasing the technical advantage of pipe materials: steel-plastic composite sheath pipe for wiring.
