Where does this requirement come from?
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Where can I find this regulation? I’d like to look for it and see the detailed instructions
This provision is entirely taken from 7.2.7 of the \"GB 50160-2008 Code for Fire Protection Design of Petrochemical Enterprises\". For your reference, 7.2.7 When utility pipes are connected to pipes or equipment for flammable gases, liquefied hydrocarbons, and flammable liquids, the following requirements shall be met: 1. Check valves shall be installed on utility pipes that are in continuous use, with isolation valves placed at their bases ； 2. Check valves and one isolation valve, or two isolation valves, shall be installed on utility pipes that are used intermittently, with a service valve installed between the two isolation valves ； 3. Utility pipes used only when the equipment is shut down should be equipped with blind flanges or disconnected.
Learning together*, thanks to the person upstairs for sharing!
Does anyone know how to set this check valve?
This post was last edited by 678-2 on 2017-10-13 09:42: a valve is to be placed between the two valves. As shown in the figure below for reference