【Haichuan Pipeline Construction】Which is better for underground circulating water pipes: PF pipes or steel pipes?
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This post was last edited by Desert Fish on 2021-11-21 at 14:28. Is it better to use PF pipes or steel pipes for underground circulating water pipes? PE pipes have better corrosion resistance than steel pipes; currently, PE pipes are used for many municipal water supply and fire protection underground pipes. But is it suitable to use PE pipes for large-diameter underground circulating water pipes in chemical plants? What are the risks?
Personal opinion: 1. The quality of the heat-fusion joints in PE pipes with large diameters is not as reliable as that of the joints in welded steel pipes. 2. The corrosion resistance of buried systems is designed for underground soil conditions; PE pipes buried underground do not require any external protection, while steel pipes can be equipped with enhanced anti-corrosion measures.
What you say makes sense; there are still concerns regarding the welding quality of large-diameter PE pipes
【HaiChuan Pipeline Construction】Which is better for underground circulating water pipes: PF pipes or steel pipes? https://bbs.hcbbs.com/thread-3270250-1-1.html (Source: HaiChuan Chemical Forum)
I’m facing the same problem and am seeking advice from those who are more experienced. I used to work with carbon steel, but now I’m using this new material, and I’m not sure about it.
Then follow the specifications, and pay special attention during welding
For buried pipes, steel pipes are recommended. For applications with higher requirements, pipes coated with epoxy on the inside and outside or other types of coatings can be used; PE pipes are not advised. The welding quality of PE pipes is not as reliable as that of arc welding or TIG welding, and moreover, their ability to withstand external pressure is slightly lower than that of steel pipes.
Could you give me some advice first? ? 【Haichuan Pipeline Construction】How to avoid buying branded valves? ? Everyone, please share your suggestions!!!! https://bbs.hcbbs.com/thread-3278243-1-1.html (Source: Haichuan Chemical Industry Forum)
There are very strict professional requirements regarding the material properties and stress of the basic materials used for buried pipes. The requirements for underground pipelines in the country, along with the shortage of professionals in this field, are truly appalling. There are too many outdated experts who refuse to do their job. Whether made of metal or plastic, no manufacturer produces buried pipes that are of satisfactory quality; contractors carry out construction in accordance with outdated relevant standards, and who knows what hidden problems exist with these underground pipes? This discussion topic is great; I hope to see in-depth discussions.