Offshore Atmospheric Vent Stack
Offshore Atmospheric Vent Stack
(OP)
I am wondering if the vent system is allowed to be filled with air during normal operation as there is no continuous purge gas available. Hydrocarbon gas will only exist in the vent stack during venting and relief and will form a flammable mixture with air which will cause detonation or deflagration in the vent system if ignition present. Is purge gas is mandatory or can we design the system at higher pressure to withstand detonation without purge gas?
Anyone can give a clue?
Anyone can give a clue?





RE: Offshore Atmospheric Vent Stack
RE: Offshore Atmospheric Vent Stack
If an ignition does occur, a Detonation Arrester is probably the best solution to prevent a flashback over a flame arrester. A simple internet search will tell you why. The location of the DA will be dependent on where you think the source of ignition is.
Cheers,
jwysmooth
RE: Offshore Atmospheric Vent Stack
RE: Offshore Atmospheric Vent Stack
And yes: vent to sagfe location is acceptale if allowed by company stadards. I see them on unmanned installations. I dont like flame arrestors. I think you introduce an obstruction in the vent path. They corrode and may also become a resting place for birds nets etc.
Best regards
Morten
RE: Offshore Atmospheric Vent Stack
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdoweb/
RE: Offshore Atmospheric Vent Stack
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(1) Gexcon AS: www.gexcon.com
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Milton Beychok
(Visit me at www.air-dispersion.com)
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