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【Common Issues in Haichuan Pipeline Design】--Why are liquid seals required for some pipelines? ?

2026-06-25View Original

Thread Content

During the design, installation, and inspection of pipelines, various minor issues that have been overlooked or not taken into account are often discovered. These issues are compiled into a series; the list is being updated continuously. Everyone is welcome to actively participate in discussions. This is a compilation post on common problems in Haichuan pipeline design – it’s still being updated, and discussions are welcome: https://bbs.hcbbs.com/thread-5705828-1-1.html ------------------------------------------------------------------
Reply #22026-06-26
【Ten Years of Rapid Development in Chemical Equipment】3173 – The largest global production capacity by 2026! Another key material in our country – the highly abundant boron-10 isotope – has now achieved domestic mass production. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5724537 (Source: HaiChuan Chemical Industry Forum (HuaHaiChuanLiu hcbbs))
Reply #32026-06-26
The primary purpose of the liquid seal in pipeline design is to utilize the static pressure generated by the liquid level to prevent two-way gas flow or to maintain a specific pressure/liquid level in the system, thereby ensuring safety and process stability.
Reply #42026-06-28
【3D Process Flow】--Basic Theoretical Knowledge of DMTO Methanol-to-Olefins https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5724818 (Source: HaiChuan Chemical Industry Forum (HuaHaiChuanLiu hcbbs))
Reply #52026-06-29
【Ten Years of Great Development in Chemical Equipment】A complete technology pathway for ethanol production from coal has been established for the period 2031–2026; a pilot-scale plant capable of producing 10,000 tons per year of methyl acetate through dimethyl ether carbonylation has completed its performance tests. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5724199 (Source: HaiChuan Chemical Industry Forum (HCBBS))
Reply #62026-06-30
【In-depth Discussion on Modular Installation by HaiChuan】Modular construction of the steel structure for Gallery 3 of Nantong Blue Sea New Materials’ FDPE plant – achieving one-time transportation, one-time installation, and successful completion in just one attempt. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5723569 (Source: HaiChuan Chemicals Forum (Hua Hai Chuan Liu hcbbs))
Reply #72026-06-30
【History of Haichuan Chemical Industry】Four factories and two institutes, Fushun Machinery and Refining Construction, Petroleum Institute... — Why is Fushun known as the cradle of China’s refining industry? (1) https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5722272 (Source: Haichuan Chemical Industry Forum (Hua Haichuan Liu hcbbs))
Reply #82026-07-02
【Common Issues in Haichuan Pipeline Design】In-depth Analysis of the Design Requirements in TSG 31-2025 \"Technical Regulations for the Safety of Industrial Pipelines\" https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5725227 (Source: Haichuan Chemical Industry Forum (Hua Haichuan Liu hcbbs))

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