Advantages of prefabricated direct buried pipes?
**Advantages of Prefabricated Direct Buried Pipes?**
Dacheng Xiangdong Insulation Refractory Material Factory
Phone: 13473696600 | 15731614448
Prefabricated direct buried pipes have become a popular choice in modern heating and insulation systems due to their numerous advantages. These pipes are designed for underground installation, eliminating the need for open trenches and reducing construction disruption. Understanding the benefits of these pipes can help in making informed decisions during project planning.
1. **Proper Familiarization with Heating Pipes**:
When installing prefabricated direct-buried pipes, it's essential to understand the different laying methods—compensated and non-compensated direct burial. Each method has its own characteristics and operational requirements. By mastering these differences, engineers can ensure safe, reliable, and cost-effective installations.
2. **Quality Control Before Installation**:
Before starting any construction, thorough investigations must be conducted. Any insulation pipes that do not meet quality standards should be rejected. This ensures only high-quality materials are used, reducing the risk of future failures.
3. **Welding Supervision**:
The welding process of insulation pipes is a critical task that requires strict supervision by engineering professionals. Proper welding ensures structural integrity and long-term performance of the system.
4. **Well Construction Impact**:
The volume and design of various wells directly affect the overall project cost and the stability of the support structures. Poor waterproofing in wells can lead to water damage and reduce the lifespan of the components. Therefore, careful attention must be given to well construction to ensure durability and safety.
5. **Pressure Testing Procedures**:
Under working pressure conditions, it's crucial to monitor the pressure of the pipe system. A two-step testing process is often used: first, checking for leaks within 10 minutes after voltage regulation; second, conducting an intensity test by increasing the pressure to 1.5 times the working pressure. A 1kg hammer is used to tap around the welds, ensuring no leakage occurs. If no leakage is detected after 30 minutes and the pressure drop is less than 0.2, the test is considered passed.
**Key Components of Prefabricated Direct Buried Pipes**:
1. **Anti-Corrosion Layer**:
This layer protects the outer steel pipe from corrosion, significantly extending its service life.
2. **External Protective Steel Pipe**:
It shields the thermal insulation layer from groundwater and provides structural support to the working pipe, helping it withstand external loads.
3. **Polyurethane Foam Layer**:
This layer maintains the temperature of the medium being transported and keeps the outer protective tube at a normal surface temperature.
4. **Barrier and Reflection Layer**:
It prevents organic foam material from entering the inorganic high-temperature resistant layer and reflects part of the heat back, improving thermal efficiency.
5. **Inorganic Hard Insulation Layer**:
This layer is heat-resistant and ensures the interface temperature with the organic insulation layer remains stable, preventing carbonization of the foam.
6. **Drag Reduction Layer**:
This layer allows the working steel pipe to expand and contract freely without resistance, ensuring smooth operation.
7. **Working Steel Pipe**:
The core component responsible for the safe and efficient transportation of the medium through the system.
For more information on prefabricated direct-buried pipes or to contact Dacheng Xiangdong Insulation Refractory Material Factory, feel free to reach out via the provided phone numbers.
[Source: http://news.chinawj.com.cn](http://news.chinawj.com.cn)
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