Not wanting to blow up the boat...

B

Birvidik_Bob

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Morning all.

I want to replace the flexible rubber gas hose feeding to my cooker, as the current hose is dated November 95 and I suspect it is out of date.

The only 8mm hose I can get hold of here in Greece seems to be welder's acetylene hose 7126 with a maximum working pressure of 200 psi (it's American). It's red with a green stripe down it.

The local gas shops tell me this is fine for butane and propane, but I seem to remember reading somewhere that you shouldn't use LPG on acetylene hose. On top of that there's a big-ass warning on the hose saying "Acetylene only".

Any gas fitters out there able to advise me before I take out half the marina?

Thanks

Bob N
 
Talbot said:
If the hose is that last section from the gas pipe to a cooker on gymbals, it is supposed to be armoured in accordance with UK regs.
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Nope, can be armoured or not, the choice is yours, as long as it complies with the right standard (whose name/number I can't remember).

Seajet keeps telling everyone that UK regs say it must not be armoured; the real answer is somewhere in between the two of you :)

Pete
 
Birvidik_Bob said:
Morning all.
welder's acetylene hose 7126

The local gas shops tell me this is fine for butane and propane, but I seem to remember reading somewhere that you shouldn't use LPG on acetylene hose. On top of that there's a big-ass warning on the hose saying "Acetylene only".

Bob N
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Hose type series 7126 is acetylene only - Grade R - you knew this anyway as it's stated as a warning on the hose. LPG will degrade it. Do not use this for LPG.
It won't happen instantly but will shorten the service life of the hose, how much is your guess, if the line is left full of LPG and not purged between uses, then you may expect less then half stated hose life.
Did you explain the usage to the local gas shops? For welding with propane it would probably be fine as the line will probably be purged between uses - not recommended however, this is cheap hose which is not 'resistant' (see below).


Hoses used for acetylene can be rated for LPG also, but this is not the hose you have specified.
For info:

"Grade R for acetylene only. Tube and cover are not flame resistant and not oil resistant.
Grade RM for acetylene only. Tube is not flame resistant and not oil resistant. Cover is flame and oil resistant.
Grade T for most fuel gases, including acetylene. Tube and cover are flame and oil resistant.

Oil Resistance: When exposed to an oily environment, Grade R hose may become soft and tacky. This may lead to hose cover separation from the reinforcement, or excessive wear of the cover.

Flame Resistance: Grade T hose has a self-extinguishing tube and cover that provides external and internal protection against exposure to adverse conditions such as hot slag, flashbacks or inadvertent flame exposure. The cover of Grade RM provides only external flame protection, and Grade R offers neither internal nor external flame protection."


If you want to be safe and have a proper service life - and I guess you do - get some proper LPG hose.

Paul

note: forgot to add; the meaning of 'hot slag' quoted above is not what you may have in mind, it could simply be the hot oil spitting off of your fried breakfast! your R grade hose may not like that much.
 
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prv said:
Nope, can be armoured or not, the choice is yours, as long as it complies with the right standard (whose name/number I can't remember).

Seajet keeps telling everyone that UK regs say it must not be armoured; the real answer is somewhere in between the two of you :)

Pete
Click to expand...

Section 7.9 of the Boat Safety Scheme says that hoses should comply with BS3212 or BS EN1763. The main requirement is that the whole length of the hose should be available for inspection. Some people misinterpret this requirement as saying that armoured hose cannot be inspected but the safety scheme does not say this. Socal website lists armoured and rubber hoses under these standards.
 
Hi Vyv.

We're currently in Lefkas, and will be until Sunday.

Hi everyone else - thanks for the comments. If I can't get the proper hose I'll use the one I've got and replace every six months or so until I can get the right stuff.

p.s. re Tati B we purge the line every time we finish using the cooker by shutting off at the bottle and burning off what's left in the pipe.
 
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Not if you have set right. True, meths is not best, but can be obviated with a dash of water. Quick safe...and clean.
Had one for 14 years in last boat and would have swapped gas in current boat, except it came with a new cooker, and the new cost of Origo Oven is stoopid!
 
vyv_cox said:
Dreadful stinking things. All right for a cup of coffee I suppose, when you can stand in the cockpit while it pollutes the saloon.
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I tend to agree - although I know how zealous some people get over their Paraffin or Meths stoves. I always worry about a fuel that sometimes seems to burn with an invisible flame.

Besides, our gas oven does some very nice roast beef which is rather trickier on an Origo.
 
Laurie said:
Why? Roast it in the oven, just the same. No oven? Invest in an Omnia.....
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Uuh - have you ever tried to cook roast beef or roast pork or roast a chicken in an Omnia?

The thing can cobble together some things but its NOT like a proper oven.... IMHO and with respect etc

And the answer to the OP is that you can get a length of gas hose posted out to you if you can't find anything local.

Ignore the very few who get ants in their smalls over gas. As the vast majority of boaters appreciate, gas is perfectly safe so long as you use half an ounce of common sense when you have it on board.
 
john_morris_uk said:
Uuh - have you ever tried to cook roast beef or roast pork or roast a chicken in an Omnia?

The thing can cobble together some things but its NOT like a proper oven.... IMHO and with respect etc

And the answer to the OP is that you can get a length of gas hose posted out to you if you can't find anything local.

Ignore the very few who get ants in their smalls over gas. As the vast majority of boaters appreciate, gas is perfectly safe so long as you use half an ounce of common sense when you have it on board.
Click to expand...

All true enough...your meat has to be smaller bits..but it roasts very well and bakes to boot. Used one for years when we had just two rings (Origo;))

But as in all things, it is horses, etc
 
Birvidik_Bob said:
I want to replace the flexible rubber gas hose feeding to my cooker, as the current hose is dated November 95 and I suspect it is out of date.
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I'll raise you 10 years. Just had the gas system re-done. The rubber piping was dated 1985 and looked as good as it did the day it went in!
 
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