We have safety valves on LNG discharges tank discharging to atmosphere through a tail pipe approx. 25m long.To prevent ignition of the release in the event of a lightning strike, would it be acceptable to provide a flame arrestor on the vent?
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25/03/2018
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Peryathambi Kulandaisamy, MLNG, kperiathambi@gmail.com
Consider installing Lightning Protection system if the vent from the LNG tank is continuous and probability of lightning strike in your area is high. This will prevent the vent to catch fire (not 100%). If the risk is high, you need to install CO2 suppression system to put off the fire.
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23/10/2015
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Jacob Holcombe, LNG Engineering , jaxon5000@gmail.com
I've worked on a set up using large dry chemical skid extinguishers with automatic and remote discharge on the sites - you can contact Tyco or Burner Fire Control - they are probably the only 2 companies in the world that have quality equipment for this application.
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26/08/2015
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Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
Today, properly designed flame arrestors are being used in flare lines. Fifty years ago, it was considered unsafe to have anything in a flare line that could foul or fail somehow and restrict the flow.
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26/08/2015
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keith bowers, B and B Consulting, kebowers47@gmail.com
NO!! The flame arrestor will have excessive 'built-up back pressure' and will cause the Safety Valve (PSV) to chatter. The likelihood of a lightening strike during a release is too improbable to calculate and the flame will self-extinguish when the valve closes.
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