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For direct discharge of fluids to atmosphere, they should be in the vaporstate, below their auto ignition temperature, and should meet one of thefollowing requirements:-
• Flammable vapors of MW less than 28.9 (MW of air).
• Flammable vapors heavier than air with MW less than 70 but with minimumdischarge
velocity of 500 fps (152 m/s), based on maximum capacity of the reliefvalve • Vapors of any MW that are non-flammable, non-toxic and non-condensable
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