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post #11 of 13 Old 01-21-2006
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Propane locker problems

Hi, Jack - Guess I''ve been lucky the past 26 years? When I originally installed my propane system the only convenient location for the tank was in the cockpit below the wheel. I have a relatively high bridge deck leading into the companionway. I have had the occasion for a tank to rust through enough to begin leaking but we smelled it before anything untoward happened. I will be rebuilding the propane installation during the next refit (now have two aluminum tanks with all the switching valves and guages ready to be installed) and will do a vent overboard above the waterline just to be a bit more ''modern''. BTW, my insurance company is called "DIAL-A-PRAYER". And since I can''t forsee selling what I''ve owned this long I don''t think I''ll be needing a surveyor. Perhaps my heirs will! :-) Terry
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post #12 of 13 Old 04-28-2006
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Propane locker problems

If I read the ABYC "standard" correctly, a propane locker vent underwater on a particular tack isn't a problem as long as it is clear when you're not heeling, or on the other tack. The whole issue is accumulation of gas in the locker if the bottle leaks (which they all will do eventually), and the very real hazard of it draining into the cabin. As long as the locker is able to drain/vent overboard at some point, then I would leave things as they are. After all, you can't stay on a starboard tack forever.
As for the locker being awash, I'm going to guess this happens when you have substantial heel on, not just 10 - 20 degrees. Same "rules" apply.
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post #13 of 13 Old 04-29-2006
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One thing to note, CNG locker designs are generally not appropriate for LPG or Propane as CNG is lighter than air, LPG or Propane are heavier than air. The safest designs are air-tight to the rest of the ship and vent to the exterior. Some of the "cockpit gas bottle lockers" qualify, as they vent via a hose that is lead out one of the cockpit drains or directly overboard.
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