Introduction to the characteristics of bellows

Release time:

2022-09-20

After assembling the double-wall corrugated pipe, the test should be carried out under pressure. Plastic pipes are typically assembled by non-professional inspectors. Due to their light weight, flexibility, easy connection, and convenient disassembly, water tests are usually conducted only after assembly, while hydraulic tests are rarely performed. Once the pressure in an urban water supply network fluctuates, leaks can easily occur. Currently, many households often opt for concealed plumbing installations. However, if the water pipes are improperly concealed and subjected to a pressure test, the safety risks become even greater—leaks would require damaging the wall surface before they can be detected and repaired.

After assembling the double-wall corrugated pipe, the test should be carried out under pressure. Plastic pipes are typically assembled by non-professional inspectors. Due to their light weight, flexibility, easy connection, and convenient disassembly, water tests are usually conducted only after assembly, while hydraulic tests are rarely performed. Once the pressure in urban water supply networks fluctuates, leaks can easily occur. Currently, many households often opt for concealed plumbing systems. However, if the water pipes are improperly concealed and subjected to a pressure test, the safety risks become even greater—leaks would require damaging the wall surface before they can be detected and repaired.

Plastic corrugated pipes come in two types: one is completely airtight and watertight, used for applications such as propellant delivery in launch vehicles, gas transmission, and water heaters; the other is made by continuously wrapping with adhesive tape. Typically wound corrugated pipes are used to protect cables in telephones, machine tools, and other equipment. In the production of desk lamp corrugated pipes, steel wires are embedded during the manufacturing process.

Plastic corrugated pipes have high compressive strength and can effectively prevent corrosion caused by stray currents. Metals are excellent conductors of electricity; in contrast, plastic corrugated pipes exhibit remarkable resilience—they are resistant to being stepped on and are not easily crushed by vibration or compaction. They also offer superior sealing and leak-proof performance compared to metal corrugated pipes, making them ideal for vacuum pump casting applications. Moreover, plastic corrugated pipes are non-conductive, which further enhances the fatigue resistance of prefabricated components. The raw material used for plastic corrugated pipes is HDPE.

Plastic corrugated pipes offer superior corrosion resistance compared to metal materials. They are immune to corrosion by acids and alkalis, do not corrode themselves, and can effectively protect prestressing tendons from corrosion. When the waterproofing of post-tensioned precast components fails, leading to seepage through microcracks or blockage/ineffectiveness of drainage systems, many prestressed structures are exposed to severe external hazards such as molten salts and saline solutions. These pipes can prevent harmful substances from leaking through and contaminating the environment, thereby safeguarding the prestressing tendons from potential corrosive damage. Plastic corrugated pipes provide a natural barrier that offers far better protective performance for prestressing tendons than traditional corrugated pipes, ensuring that post-tensioned prestressed structures maintain excellent service performance.

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