Plastic pipes must be protected from prolonged exposure to sunlight. Unlike traditional metal pipes, plastic materials have limited resistance to ultraviolet (UV) radiation, which can cause them to degrade and age over time when exposed directly to the sun. To ensure the long-term integrity and safety of the pipeline system, proper protective measures should be implemented during design, installation, and final inspection. These methods help extend the service life of the system. This kind of protection is typically not required for conventional piping materials.
To address this issue effectively, the priority in engineering should focus on natural compensation techniques combined with fixed brackets. The fixed brackets must maintain full surface contact with the pipe rather than just a line contact, ensuring better stability and reducing stress points that could lead to failure.
The connection methods used for plastic pipelines significantly enhance the overall safety of the system. In addition to traditional techniques like threaded or flanged connections, new methods such as hot-melt welding, electrofusion, snap ring, and mechanical push-fit connections have been developed. These modern approaches offer improved durability and leak resistance.
Hot-melt connections, in particular, are widely used in both indoor and outdoor piping systems. They provide excellent structural integrity and flexibility, allowing the pipes to withstand external forces without cracking or breaking. Historical earthquake damage analyses, such as those from the Haicheng and Tangshan earthquakes in China, showed that traditional cast iron water supply pipes suffered extensive damage, with 95% of fractures occurring at the joints. Plastic pipes, by contrast, demonstrated much greater resilience under similar conditions.
Moreover, the development of new pipe fittings has revolutionized the way plumbing systems are designed. For example, specialized fittings like water dividers are now commonly used in building water supply systems. These fittings eliminate the need for intermediate connectors and take full advantage of the low friction loss characteristics of plastic piping, improving efficiency and reducing maintenance needs.
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