How to judge the quality of geothermal pipes
With the popularization of geothermal energy applications, geothermal pipes are the core components of ground source heat pump systems, and their quality is directly related to the efficiency and life of the system. This article will combine the hot topics and hot content on the Internet in the past 10 days, analyze how to judge the quality of geothermal pipes from multiple dimensions, and provide structured data for reference.
1. Key indicators of geothermal pipe quality
The quality of geothermal tubes mainly depends on materials, workmanship and performance parameters. The following are several key indicators for judging the quality of geothermal pipes:
| indicator | Characteristics of high-quality geothermal pipes | Characteristics of inferior ground heat pipes |
|---|---|---|
| Material | High-density polyethylene (HDPE), corrosion-resistant and anti-aging | Recycled materials or low-quality plastic, easy to crack |
| wall thickness | Uniform and in line with national standards (usually ≥2.0mm) | Uneven, partially too thin |
| Pressure resistance | Pressure bearing capacity ≥1.6MPa, no leakage | Low pressure bearing capacity, explosive pipe |
| thermal conductivity | ≥0.4W/(m·K), high heat exchange efficiency | Low thermal conductivity affects system energy efficiency |
2. How to judge the quality of geothermal pipes by their appearance
1.Observe color and shine: High-quality geothermal pipes usually have uniform color and smooth surface without impurities; inferior pipes are dark in color or have spots.
2.check mark: Geothermal pipes produced by regular manufacturers will be marked with materials, specifications, production date and other information, while inferior products often have unclear or missing markings.
3.Test flexibility: High-quality HDPE pipes have good flexibility and can be bent but will not break; inferior pipes are prone to brittleness.
3. Performance testing methods
| test items | Test method | Qualification standards |
|---|---|---|
| Withstand voltage test | Pressurize to 1.5 times working pressure and maintain for 30 minutes | No leakage or deformation |
| Thermal Stability Test | Continuous operation for 1000 hours at 80°C | Performance degradation ≤5% |
| Impact resistance test | A 1kg weight falls freely from a height of 1m | No cracks in the pipe |
4. Brand and Certification Selection Suggestions
1.Choose a well-known brand: Mainstream geothermal pipe brands on the market include Lesso, Weixing, Rifeng, etc. The product quality of these brands is relatively guaranteed.
2.View certification: High-quality geothermal pipes should have ISO9001 quality management system certification, National Building Materials Testing Center report and other qualifications.
3.After-sales service: Regular manufacturers usually provide more than 10 years of warranty service, which is an important endorsement of product quality.
5. The relationship between recent industry hot spots and the quality of geothermal pipes
1.Carbon neutrality policy push: With the advancement of the national carbon neutrality strategy, the demand for high-efficiency geothermal pipes has increased, prompting manufacturers to improve quality standards.
2.New material research and development: Recently, a research institution has developed a nanocomposite geothermal pipe, which has improved thermal conductivity by 30% and has become the focus of the industry.
3.Strengthened industry standards: Many places have issued construction specifications for ground source heat pump systems, putting forward higher requirements for the quality of geothermal pipes.
6. Summary of purchasing suggestions
1. Give priority to products made of HDPE and with wall thickness up to standard;
2. Request the manufacturer to provide a complete test report;
3. On-site inspection of construction sites or operational cases;
4. Focus on the long-term performance stability of the product rather than just the initial price.
Through the above comprehensive evaluation in many aspects, consumers can purchase geothermal pipes with reliable quality to ensure long-term and efficient operation of the geothermal heat pump system.
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