【Common Issues in Haichuan Pipeline Design】--The rupture disc is not installed within 5 times the pipe diameter from the inlet side of the safety valve

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During the design, installation, and inspection of pipelines, various minor issues that have been overlooked or not taken into consideration are often identified. 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 ------------------------------------------------------------------ 1. Description of the hazard: The rupture disc is not installed within 5 times the pipe diameter from the inlet side of the safety valve. 2. Risk analysis: If the installation distance is too large, the flow of the medium is obstructed after the rupture disc bursts, preventing the safety valve from opening in a timely manner or reaching its fully open position. 3. The regulatory requirements specified in Article 4.3.2.2 of \"Safety devices for burst discs – Part 2: Application, selection and installation\" (GB/T 567.2-2012) state that when a safety device for burst discs is installed on the inlet side of a safety valve, the following requirements must be met: b) The nominal diameter of the safety device for burst discs shall be no smaller than the diameter of the pipe on the inlet side of the safety valve, and it shall be installed within 5 times the diameter of that pipe from the inlet side of the safety valve.