【Haichuan WeChat Group】For safety valve outlets, what is the typical flow rate of emergency gas?
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Question from a WeChat group: Regarding the safety valve outlet, what is the typical flow rate of the gas in case of an accident?
At the relief outlet of the safety valve, high flow rates can lead to static electricity discharge, which may cause explosions and fires, even though there is a static electricity grounding system in place on the pipeline. We have had similar accidents before
It mainly depends on the voltage drop; the speed can range from dozens to hundreds
Install a nitrogen pipeline on the vent line; just extinguish the fire if it starts – what’s there to worry about?
Like a torch? A supporting system is needed
Relevant requirements in HG/T20570
No need; just use fire-extinguishing nitrogen and add a nitrogen quick-opening valve
Is manual observation required? ? ?
It is generally kept at no more than 50% of the critical flow velocity