Can a flame arrester be installed behind a safety valve?
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During the inspection by external experts, it was suggested that installing a flame arrester after the safety valve could affect the flow rate in the drainage pipeline. I would like to know if this is indeed a problem – is it absolutely impossible to install a flame arrester after the safety valve? How is the flashback problem solved?
I would like to ask if flame arrestors are installed behind the safety valves of the polymerization reactors in your plants? https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=540632&shareuid=4554153 Check out this post
I personally think installing a flame arrester is very dangerous. Safety valves are designed for emergency release, whereas, based on my personal experience, flame arrestors tend to get clogged easily due to the presence of their flame-blocking elements. If discharge occurs frequently, pressure difference elements can be added on both sides of the flame arrester to provide indication; however, safety valves do not discharge for long periods of time, and there is no flowing medium available for measurement, which is very dangerous.
A flame arrester must not be installed behind a safety valve. Safety valves typically activate as a result of overpressure; if a flame arrester is placed behind the valve, it will affect the discharge capacity of the safety valve, which can very likely lead to overpressure in the container or pipeline, thereby increasing the risk
There are no specific standards defined for safety valves. However, when selecting a safety valve, it is necessary to take into account the reduced flow rate caused by the flame arrester; that is, the design should be done accordingly, and if needed, a flame arrester with a higher flow rate should be chosen.
It can be installed; just calculate the flux properly. Also, try to install flame arresters on the main control pipe
Why is a flame arrester installed behind a safety valve? ?
When installing a flame arrester, the flow rate should be taken into account; in my opinion, it is best to install it in front of the safety valve. Generally, the discharge of hazardous chemicals is done in a closed system; is backfire also taken into consideration?
The safety valve opens only when overpressure is reached; how can backflow occur? The question itself is a false proposition.
A flame arrester must not be installed behind a safety valve, as it affects the discharge capacity of the safety valve and is likely to cause overpressure in the container or pipeline, leading to an explosion
I’m not entirely sure either – as the reaction vessel loses pressure and the pressure drops, could there be a risk of flashback?