【Common Issues in Haichuan Pipeline Design】No check valve is installed on the nitrogen sealing pipeline of the storage tank
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No check valve is installed on the nitrogen sealing pipeline of the storage tank. Standard reference: GB 50160-2018 Code for Fire Protection Design of Petrochemical Enterprises. Article 7.2.7 states the following requirements regarding the connection of utility pipelines with pipelines or equipment that handle flammable gases, liquefied hydrocarbons, and flammable liquids: 1. Check valves shall be installed on utility pipelines that are in continuous use, along with isolation valves at their ends; 2. On utility pipelines that are used intermittently, check valves together with one isolation valve or two isolation valves shall be installed, with a inspection valve placed between the two isolation valves; 3. Utility pipelines that are used only when the equipment is not in operation shall be equipped with blind flanges or disconnected.
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