May the medium discharged from the pressure relief manhole or safety valve be directly released into the atmosphere? Where do you all discharge it to?
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May the medium discharged from the pressure relief manhole or safety valve be directly released into the atmosphere? Where do you all discharge it to?
Handle it properly according to the properties of the medium
Pressure relief manholes are usually designed for direct discharge; this is the last resort, and there is generally no need for collection! For safety valves, the material that comes out, as well as safe water and steam, can be discharged directly to a safe location. For process materials, there are generally collection tanks; it is best if they can hold liquids. In chemical plants, for materials that can be burned, sending them to the flare system is the usual choice.
There are two destinations for safety valves: one is for on-site discharge (to a safe location), such as in deaerators, and the other is to the flare stack (gas holder). All toxic, harmful substances, or pollutants are discharged through sealed systems. If a pressure vessel is equipped with a rupture disc, it is most likely to contain harmless substances
There are pressure relief holes, but no pressure relief manholes – that’s really terrifying.
Steam, nitrogen, and the like can be vented directly; in other cases, it depends on the properties of the medium, and usually a separate pipeline needs to be connected to the flare system or abatement system.
If it is a chemical processing unit, the Fire Protection Design Code for Petrochemical Enterprises GB50160 sets relevant requirements
However, the diameter of the pressure relief manhole is DN500, and connecting a separate DN500 pipe would be a bit too large
Isn’t it difficult to connect the pipe above the key pressure relief manhole?
As long as your medium is a toxic and flammable material, you have to connect it even if you don’t want to； In another case, the direct design does not pass