Gas Bottle stowing ??
Submitted: Monday, Apr 16, 2007 at 16:16
ThreadID:
44374
Views:
13880
Replies:
14
FollowUps:
22
This Thread has been Archived
Member -Signman
Seeing as it's a no-no to carry LPG bottles inside a vehicle- what are the options for safely stowing the bottle exterior?? Occy strapped down on the roof rack?? Rope tied to the bullbar?? Dragging behind the vehicle on a length of chain??
I think ours is a 4kg job, about 250mm dia and 300+mm high.
Reply By: kimprado - Monday, Apr 16, 2007 at 19:02
Monday, Apr 16, 2007 at 19:02
Signman
Here are the two things I'm looking for:
1. Roof top quick release gas bottle holder (various sizes).
2. Roof rack axe holder.
On the serious side, I spent 9 years in the petroleum industry and during that time we were subjected to many safety demonstrations (including gas).
The most memorial was a 2 litre container of petrol, which was allowed to get a half head of vapour. This was ignited in a relatively small environment. The result left me totally stunned and I'll never forget it.
The result of a half filled 20 litre container exploding inside a vehicle defies imagination.
If plastic fuel containers are carried on the roof rack in hot weather they should be vented (
well away from an ignition source) regularly. This doesn't apply to Diesel.
Regards
Kim
AnswerID:
233845
Follow Up By: Member - bushfix - Monday, Apr 16, 2007 at 19:27
Monday, Apr 16, 2007 at 19:27
g'day Kim,
as you probably know, what (it sounds like) happened is known as a BLEVE (Boiling Liquid Expanding Vapour Explosion.) The container could no longer contain the vapour as the liquid was heated and changed to create more vapour, expanded. Eventually the container ruptures and WHOOOOOOOMP!!!!!!!
same thing can happen with lpg, but if the container is allowed to vent then as long as it can keep ahead of the vapourizing lpg then eventually it will burn out.
i've seen some truly frightening videos of fixed and mobile plant going up this way, I never want to be anywhere near one. i'm not telling you a thing I'm sure.
as you say, venting is necessary (
well away from an ignition source), otherwise you get a PUVCE (Percussive Unconfined Vapour Cloud Explosion).....like lighting your gas bbq and losing your eyebrows....on a small scale....
FollowupID:
494738
Follow Up By: Trevor M (SA) - Monday, Apr 16, 2007 at 22:05
Monday, Apr 16, 2007 at 22:05
The best answer I have found for attaching both my axe and my shovel to the roofrack are rubber clamps called "Quickfist" available for about $25 per pair at ARB. I have 2 sets of 2 simply cable tied to my racks, 2 for the axe and 2 for the shovel.
Try this site:
Quickfist
Hope that link worked, otherwise paste this: Site Link
Cheers
Trev
FollowupID:
494794
Follow Up By: Trevor M (SA) - Monday, Apr 16, 2007 at 22:08
Monday, Apr 16, 2007 at 22:08
If you click on my rig
pic you can see how they are set up
Trev
FollowupID:
494797
Follow Up By: V8Diesel - Monday, Apr 16, 2007 at 23:28
Monday, Apr 16, 2007 at 23:28
bushfix, have you seen that old 16mm film of the BLEVE in the US taken some time in the early 1970's? It was about a rail car fire and they were trying to remove heat from the equation by cooling the steel of the propane tanks with water from hook and ladder truck? This effectively circumvented the blow off valves and caused metal failure in the pressure vessel. WOOOMPAHH!! We watched it as part of the course for St
John's training when I was doing my ambo's ticket.
The coroners report and explanation of the chain of events made for very scary viewing. Wouldn't mind seeing it again actually. It made for good viewing.
As you wisely say, run like hell and don't look back.
FollowupID:
494824
Follow Up By: Member - bushfix - Tuesday, Apr 17, 2007 at 06:54
Tuesday, Apr 17, 2007 at 06:54
G'day V8,
yes i remember that one, frightening. I recall that large bits of the tanks etc. were found hundreds of metres away in a paddock.
FollowupID:
494836
Follow Up By: Member - Kiwi Kia - Tuesday, Apr 17, 2007 at 07:29
Tuesday, Apr 17, 2007 at 07:29
Blev's make incredible tv viewing but are very rare. The conditions required are that the metal tank must be so hot that the metal becomes plastic and allows the internal pressure to blow a hole in the side of the tank. You would have to have the tank in an intense fire for quite some time or have a oxy torch playing on one spot on the wall of the tank for some time. A gas leak however may form an explosive atmosphere condition and would be far more of a danger when storing a gas cylinder in a vehicle. If the cylinder is
well secured and the tap is firmly off you should have no worries.
FollowupID:
494838
Reply By: kimprado - Monday, Apr 16, 2007 at 20:16
Monday, Apr 16, 2007 at 20:16
Bushfix
Yes, I think people get a bit blasé around fuel and gas. However, we also had some funny experiences (not at the time).
In one of my depots I decided to conduct a gantry safety exercise. Without going into a long story, we placed a driver behind the rear wheels of a truck at the gantry (he was blown off the truck and a fire started). The only people who had knowledge of this were the driver, myself and the CFA chief.
What transpired after that was Keystone Cop stuff. The fire crew nearly suffocated and drowned the poor buggar. Had to give him a couple of days off to get over it.
On another occasion (in another town), the municipal leaders, CFA and I decided to overturn an old degassed tanker on a main highway and conduct an exercise.
Well, let me tell you this did not go down
well with the touring public or State authorities. The locals thought it was a real buzz, but my CEO had a serious blood pressure problem for some time.
Regards
KIm
AnswerID:
233863
Follow Up By: Member - bushfix - Monday, Apr 16, 2007 at 20:32
Monday, Apr 16, 2007 at 20:32
he he he
reminds me...
you must have seen that video of the foam excercise (in a hangar) where it just keeps rising, and rising and rising.....
FollowupID:
494765
Reply By: Go-N-Grey (WA) - Monday, Apr 16, 2007 at 23:12
Monday, Apr 16, 2007 at 23:12
Interesting comments!
I just recently purchased a new caravan complete with two jerry can holders on the rear bumper.
There is a sticker attached to then saying "Do not carry inflammable liquids in these holders"
If anyone runs up the back of my rig through inattention they deserve to die, I dont stop in a hurry with over 6 tonne all up weight.
Have carried 20lites diesel, 10 litres of Petrol (for gennie) and a spare 4.5kg gas cylinder on the rear bumper of my old Jayco poptop for years.
Is this illegal? and when were the regs changed
AnswerID:
233911
Follow Up By: kimprado - Monday, Apr 16, 2007 at 23:47
Monday, Apr 16, 2007 at 23:47
I think you're missing the point. Does'nt matter if its illegal or if you've got away with it for a long time. Chit happens!
Have a re think about safety.
Regards
KIm
FollowupID:
494827