May I ask about the leakage prevention and corrosion protection for buried sewage pipes?
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I have a question for everyone: 1. Since all buried pipeline materials specified in GB50934 are steel pipes, does this mean that steel pipes are the only option for buried pipelines nowadays? If so, why are non-metallic pipes still provided for HDPE membrane impermeabilization? 2. Among these two methods for underground sewage pipes – seamless steel pipes with anti-corrosion treatment versus non-metallic pipes with leak-proofing – which one is more cost-effective? Thank you all!
Buried pipelines cannot be considered solely from an economic perspective; they all have a designated service life. For example, the structural design of urban water supply pipelines is intended to last for 50 years. If non-metallic pipelines are used, it is necessary to ensure that their service life meets the required standards； In addition, there are also requirements regarding the burial depth of buried pipes; it should be at least 1.5 meters. In areas with uneven terrain, the pipes are subject to underground movements and settlement of the soil, which poses a significant challenge to non-metallic pipes. Therefore, for reasons of safety and quality, the use of non-metallic pipes must be strictly regulated. The many years of experience with metallic pipes ensure their safe operation, and safety is of utmost importance.
Agree with the professional answer from the Northern Wolf Clan on floor 2! Safety and durability, resistance to compression and leakage, as well as wear resistance – these should be the key considerations. Once the basic functions are met, physical strength also needs to be taken into account. Of course, it is also important to consider whether the method of sealing is secure, reliable, and easy to use.