LPG piping - unsafe?

[Boo2]

I know that, but Boo2 clearly doesn't understand, which is why I asked him the question.

I suppose if you take my post literally then you end up with that conclusion, but my degree in Mathematical Physics did in fact leave me with a reasonable understanding of Stat Mechs in general and the ideal gas laws in particular...

Boo2

 

[pvb]

I suppose if you take my post literally then you end up with that conclusion, but my degree in Mathematical Physics did in fact leave me with a reasonable understanding of Stat Mechs in general and the ideal gas laws in particular...

Sorry, I must remember to assume in future that you perhaps don't mean what you say! Seriously, there are more than enough examples of incorrect advice in these forums, and so it's important that posts are carefully worded.

 

[nimbusgb]

As an aside I have just noticed, whilst grilling a couple of rib-eye steaks, that the flexible hose on my gas outdoor BBQ is dated 1994....

Sod it! It's outside so if gas leaks it hardly matters! Despite 17 years in the open it's still pretty much intact.

 

[Tranona]

It rather depends on whether you need to comply with the BSS, which states "All LPG hoses must be accessible for inspection along their entire length. All LPG hoses must be marked to BS 3212 type 2 or equivalent." Braided hoses tend not to meet these requirements.

Well, I have just checked and the hose is stamped BS3212/2 and is visible over its entire length from the bulkhead fitting to the cooker inlet. As said, it was recommended by Calor Southern and installed by an approved fitter who replaced and tested the complete system.

 

[30boat]

Are you sure you have not misunderstood, AFAIK the same hose is used for butane and propane.
BUT
There is high pressure hose and low pressure hose. The high pressure is reinforced and is orange, The LP is not reinforced and as far as I know is black.

Camping shops like to stock only one type...so they keep just the HP type

The hoses should be replaced at 5 years from the date of manufacture which is printed on the hose so check the date on any you buy!

That's what the man said .I prefer the stonger(black)hose anyway.

 

[VicS]

That's what the man said .I prefer the stonger(black)hose anyway.

I am puzzled. As far as I am aware there are two types of hose:

To BS 3212:1991 Type 2. Orange. For maximum working pressure of 17.5 bar (257 p.s.i.). I.e. for the high pressure connection

To BS 3212:1991 Type 1. Black. For maximum working pressure of 50 mbar (20" wg). for low pressure connections.

I have found nothing to suggest that there are different grades for butane or propane although of course the made up HP hoses have end fittings to suit the different cylinders.

Last time I changed my hoses I bough the new stuff, along with a new regulator, from the local camping store where they only stocked the HP hose. With a bottle mounted regulator I obviously do not need the HP hose. I would much have preferred the LP hose as it is easy to push on to the fittings and is, I think, a bit more flexible as well. Next time I will buy from somewhere that stocks the LP hose.

 

[Topcat47]

Calor have a page on their website with the "code" for boats and a handy booklet (also downloadable) explaining how to rig a compliant gas system.

Broadly speaking, IF you have a gimballed cooker, you must have an armoured hose connecting it to the fixed pipework. This must be <1m in length. It will have the date of manufacture stamped on the crimp ferrules at either end of the hose. Any flexible hoses must be "in date" (<5years old). Any gas pipes inside the vessel must be copper and fastened securely every metre or less. Where the pipes pass through a bulkhead, they ought to pass via a bulkhead fitting. If they pass through any other part of the structure, they need to be protected from chafe. I have an internal cock next to my cooker (essential if you have more than one gas appliance, otherwise optional).

I would never use plain hose inside the vessel at any time, it's just too vulnerable. I'm not sure whether it's "Legal" but it doesn't comply with the recreational craft code.

 

[saltylegs]

I am puzzled. As far as I am aware there are two types of hose:

To BS 3212:1991 Type 2. Orange. For maximum working pressure of 17.5 bar (257 p.s.i.). I.e. for the high pressure connection

To BS 3212:1991 Type 1. Black. For maximum working pressure of 50 mbar (20" wg). for low pressure connections.

I have found nothing to suggest that there are different grades for butane or propane although of course the made up HP hoses have end fittings to suit the different cylinders.

Last time I changed my hoses I bough the new stuff, along with a new regulator, from the local camping store where they only stocked the HP hose. With a bottle mounted regulator I obviously do not need the HP hose. I would much have preferred the LP hose as it is easy to push on to the fittings and is, I think, a bit more flexible as well. Next time I will buy from somewhere that stocks the LP hose.

correct the 3212/2 is high pressure and the 3212/1 is low pressure no difference for propane or butane.
generally black hose to 3212/1 has not been used for about 15 years but black 3212/2 is stillavailable but normally only as preassembled "pigtails for connecting the cylinders to the regulator at cylinder pressure.

 

[VicS]

correct the 3212/2 is high pressure and the 3212/1 is low pressure no difference for propane or butane.
generally black hose to 3212/1 has not been used for about 15 years but black 3212/2 is stillavailable but normally only as preassembled "pigtails for connecting the cylinders to the regulator at cylinder pressure.

BES list the black LP hose ... at least that's where I copied and pasted the reference from! Their website might be out of date but not by 15 years. I think I last bought black LP hose about 10 years ago.

 

[davidpbo]

As an aside I have just noticed, whilst grilling a couple of rib-eye steaks, that the flexible hose on my gas outdoor BBQ is dated 1994....

Sod it! It's outside so if gas leaks it hardly matters! Despite 17 years in the open it's still pretty much intact.

I think the one on my Tilley Tallisman camping cooker (not used on boat) is dated 1978. I will replace it before I use it again promise.

I turn gas off at bottle at night, sailing and when leaving the boat unattended however short a time. Usually turn gas off at appliance isolator valve when I turn the burner off or before.

 

[saltylegs]

BES list the black LP hose ... at least that's where I copied and pasted the reference from! Their website might be out of date but not by 15 years. I think I last bought black LP hose about 10 years ago.

sorry I may have been quoting instructions from a major lpg supplier to thier installers with regard to not using the bs3212/1 black hose.

 

[VicS]

I think the one on my Tilley Tallisman camping cooker (not used on boat) is dated 1978. I will replace it before I use it again promise.

I turn gas off at bottle at night, sailing and when leaving the boat unattended however short a time. Usually turn gas off at appliance isolator valve when I turn the burner off or before.

Is your Tallisman a high pressure stove.

We used to use a high pressure Tilley stove when camping.. Very important with those to turn off at the bottle and burn off excess gas.

Actually we have a virtually unused Tallisman still in original box, that belonged to the in laws. Pity its no good for the boat!

 

[wotayottie]

BES list the black LP hose ... at least that's where I copied and pasted the reference from! Their website might be out of date but not by 15 years. I think I last bought black LP hose about 10 years ago.

They still supply it - I bought a length a few months ago when I made my big cylinder to camping gaz refill system up.

Bit surprised at the H&S attitude of some posters, particularly given the way we moan about H&S in general. Gas piping isnt rocket science.

 

[ostell]

Last time I changed my hoses I bough the new stuff, along with a new regulator, from the local camping store where they only stocked the HP hose. With a bottle mounted regulator I obviously do not need the HP hose. I would much have preferred the LP hose as it is easy to push on to the fittings and is, I think, a bit more flexible as well. Next time I will buy from somewhere that stocks the LP hose.

Perhaps I'm not the only one that didn't know that dipping the end of the orange hose in hot water before pushing on the fittings makes it a lot easier.

 

[VicS]

They still supply it - I bought a length a few months ago when I made my big cylinder to camping gaz refill system up.

Bit surprised at the H&S attitude of some posters, particularly given the way we moan about H&S in general. Gas piping isnt rocket science.

I hope you are not saying you are using the low pressure type 1 hose, suitable for pressures to 50mbar only, for your gas bottle refilling system.

You absolutely must use the Type 2 high pressure hose for that.

 

[Twister_Ken]

Gas piping isnt rocket science.

Well, it is if you want to burn oxygen and hydrogen in a rocket motor.