"Mick Davies" wrote in message
om...
I understand there are sniffers to detect propane build-up but if such a
pocket of collected gas is found how do you clean it out and make the boat
safe again?

Open the hatches and circulate air.

Propane isn't any worse than gasoline. Both are heavier than air and will
settle to the lowest spot. In most cases there will be a path to the lowest
part of the boat, which is generally the engine compartment where there
should be a bilge blower. Run the blower to get the fumes out.

IF yo have a propane locker it should have a drain leading directly
overboard so that any leaks there will take care of themselves.

Rod

Combustible gasses have two limits, the lower limit of combustion and the
upper limit of combustion, too much air and not enough fuel - it will not
burn, too much fuel and not enough air and it will not burn. These limits
are expressed in percentages.
A proper blower located up high with an intake in the lowest areas should
safely remove the vapors.
If there is any question ventilate, as long as the source of the fumes is
shut off ventilation should remove the hazard (just make sure the method of
venting does not introduce an ignition source).

Eric

"rmcinnis" wrote in message
...

"Mick Davies" wrote in message
om...
I understand there are sniffers to detect propane build-up but if such a
pocket of collected gas is found how do you clean it out and make the
boat
safe again?

Open the hatches and circulate air.

Propane isn't any worse than gasoline. Both are heavier than air and will
settle to the lowest spot. In most cases there will be a path to the
lowest
part of the boat, which is generally the engine compartment where there
should be a bilge blower. Run the blower to get the fumes out.

IF yo have a propane locker it should have a drain leading directly
overboard so that any leaks there will take care of themselves.

Rod

A proper blower located up high with an intake in the lowest areas should
safely remove the vapors.

why does the blower have to be up high? blowers are in fact are usually down
low, and usually have been since the CG started requiring them in 1940 (1942?).

On 15 Oct 2004 12:15:23 GMT, (JAXAshby) wrote:

why does the blower have to be up high?

====================================

Keeps them out of the bilge.

WTF are you talking about weenye?

a blower is required to be mounted "up high" with its inlet down low, because
if the blower itself were mounted down low it work?

how come the USCG doesn't know this?

Wayne.B
Date: 10/15/2004 10:46 AM Eastern Daylight Time
Message-id:

On 15 Oct 2004 12:15:23 GMT, (JAXAshby) wrote:

why does the blower have to be up high?

====================================

Keeps them out of the bilge.

On 16 Oct 2004 01:25:03 GMT, (JAXAshby) wrote:

a blower is required to be mounted "up high" with its inlet down low, because
if the blower itself were mounted down low it work?

how come the USCG doesn't know this?

========================================

Everyone else knows it, why don't you?




















/

the coast guard doesn't, either.

a blower is required to be mounted "up high" with its inlet down low,
because
if the blower itself were mounted down low it work?

how come the USCG doesn't know this?

========================================

Everyone else knows it, why don't you?




















/

"JAXAshby" wrote in message
...

why does the blower have to be up high? blowers are in fact are usually
down
low, and usually have been since the CG started requiring them in 1940
(1942?).

Unless the blower is sumbergable (none that I have ever seen are) you would
want to take care to mount the blower higher than any expected accumulation
of bilge water. Even unexpected amounts!

Many of the cheap blowers are "flange mount" and by design need to mount to
the underside of the deck where the exhaust fitting is located. The hose
connected to the intake of the blower should have its lower end mounted so
that it is as low in the boat as possible but above the normal accumulation
of bilge water, per Coast Guard regulations.

Rod

Unless the blower is sumbergable (none that I have ever seen are) you would
want to take care to mount the blower higher than any
----------------------------- expected ----------------------------------
accumulation
of bilge water. Even unexpected amounts!

expected??? unexpected? who the hell is worried about butane in the bilge
when expected (WTF is that???) water or unexpected water is in the bilge?

if you intend to have water in you bilge, there is still NO need to mount the
blower "up high". just mount it above "expected" or likely "unexpected" high
water level mark.

duh.

You mount the blower up high to keep electric motor above the expected
fumes...a blower mounted low can have the fumes seep into the electric motor
that drives it, a blower mounted high has the motor in fresh air and only
the fumes are drawn up to the blower, and the fumes are in the fan section
and from there they are quickly ejected overboard.

Sump pumps are mounted low (in the bilge water) to pump out water and
because they are ment to be submerged they are sealed to keep out water and
fumes which should make them fairly explosion proof.
as far as I know there are no submergable blowers, a blower is ment to move
air and is not ment to work underwater.

If the blower was mounted low when you turned it on you could set off the
explosion you are trying to avoid.

Blowers are mounted high to prevent explosions.

Eric

"JAXAshby" wrote in message
...
Unless the blower is sumbergable (none that I have ever seen are) you
would
want to take care to mount the blower higher than any
----------------------------- expected
----------------------------------
accumulation
of bilge water. Even unexpected amounts!

expected??? unexpected? who the hell is worried about butane in the
bilge
when expected (WTF is that???) water or unexpected water is in the bilge?

if you intend to have water in you bilge, there is still NO need to mount
the
blower "up high". just mount it above "expected" or likely "unexpected"
high
water level mark.

duh.