Speedfit compressed air fittings for temp domestic gas ?..
Discussion
Like a few others on this thread this is my job and we do know what we are talking about 
Firstly I hope the OP is joking but it does not sound like it! Please dont do anything that ridiculous and try to defend the idea as being ok.
You could kill not only yourself but others too. Not just family but neighbours as well.
This is the first story of gas explosions in google. There are others but fortunately not too many.
http://www.dailymail.co.uk/news/article-2329165/In...
In particular this bit:-
Gas incidents
Distributors, fillers, importers & suppliers of flammable gas must report incidents where someone has died, lost consciousness, or been taken to hospital for treatment to an injury arising in connection with that gas. Such incidents should be reported using the online form.
Registered gas engineers (under the Gas Safe Register,) must provide details of any gas appliances or fittings that they consider to be dangerous, to such an extent that people could die, lose consciousness or require hospital treatment. The danger could be due to the design, construction, installation, modification or servicing of that appliance or fitting, which could cause:
an accidental leakage of gas;
incomplete combustion of gas or;
inadequate removal of products of the combustion of gas.
Firstly I hope the OP is joking but it does not sound like it! Please dont do anything that ridiculous and try to defend the idea as being ok.
You could kill not only yourself but others too. Not just family but neighbours as well.
This is the first story of gas explosions in google. There are others but fortunately not too many.
http://www.dailymail.co.uk/news/article-2329165/In...
Timlocalad said:
RIDDOR requires deaths and injuries to be reported only when:
there has been an accident which caused the injury
the accident was work-related
the injury is of a type which is reportable
You really should have a read of http://www.hse.gov.uk/riddor/reportable-incidents.... before saying these things as fact. It is part of what riddor is for.there has been an accident which caused the injury
the accident was work-related
the injury is of a type which is reportable
In particular this bit:-
Gas incidents
Distributors, fillers, importers & suppliers of flammable gas must report incidents where someone has died, lost consciousness, or been taken to hospital for treatment to an injury arising in connection with that gas. Such incidents should be reported using the online form.
Registered gas engineers (under the Gas Safe Register,) must provide details of any gas appliances or fittings that they consider to be dangerous, to such an extent that people could die, lose consciousness or require hospital treatment. The danger could be due to the design, construction, installation, modification or servicing of that appliance or fitting, which could cause:
an accidental leakage of gas;
incomplete combustion of gas or;
inadequate removal of products of the combustion of gas.
What kind of appliances? If you want a hob or oven then you can pick up portable electric jobs that plug into a 13A socket, cost very little and you can sell it on when you're done with it.
For a few weeks worth of convenience I wouldn't be shelling out for a gas man to rig something up, but neither would I be considering lashing something up myself and hoping it doesn't go wrong!
For a few weeks worth of convenience I wouldn't be shelling out for a gas man to rig something up, but neither would I be considering lashing something up myself and hoping it doesn't go wrong!
james7 said:
Like a few others on this thread this is my job and we do know what we are talking about
This is the first story of gas explosions in google. There are others but fortunately not too many.
http://www.dailymail.co.uk/news/article-2329165/In...
To be fair to the OP he was asking whether it would work and if not, why not. None of the people who "know what they are talking about have" explained why speedfit pipe that is designed for gas at higher pressures than mains gas shouldn't be used in this situation?This is the first story of gas explosions in google. There are others but fortunately not too many.
http://www.dailymail.co.uk/news/article-2329165/In...
You've linked to a gas explosion caused by something nothing like what the OP is asking about, so it's hardly relevant. We all know what happens if gas leaks and causes an explosion.
As far as I can see the OP shouldn't do it because you have to hold the right qualifications to be legally allowed to touch the gas supply, but the question of whether the speedfit pipe could work hasn't been addressed.
paulrockliffe said:
james7 said:
Like a few others on this thread this is my job and we do know what we are talking about
This is the first story of gas explosions in google. There are others but fortunately not too many.
http://www.dailymail.co.uk/news/article-2329165/In...
To be fair to the OP he was asking whether it would work and if not, why not. None of the people who "know what they are talking about have" explained why speedfit pipe that is designed for gas at higher pressures than mains gas shouldn't be used in this situation?This is the first story of gas explosions in google. There are others but fortunately not too many.
http://www.dailymail.co.uk/news/article-2329165/In...
You've linked to a gas explosion caused by something nothing like what the OP is asking about, so it's hardly relevant. We all know what happens if gas leaks and causes an explosion.
As far as I can see the OP shouldn't do it because you have to hold the right qualifications to be legally allowed to touch the gas supply, but the question of whether the speedfit pipe could work hasn't been addressed.
Plastic pipe could melt in situations long before the solder on a copper fitting would, for example, I've seen a washing machine hose melt against the back of a dishwasher and pipe showing signs of melting from close proximity to spotlights.
paulrockliffe said:
To be fair to the OP he was asking whether it would work and if not, why not. None of the people who "know what they are talking about have" explained why speedfit pipe that is designed for gas at higher pressures than mains gas shouldn't be used in this situation?
You've linked to a gas explosion caused by something nothing like what the OP is asking about, so it's hardly relevant. We all know what happens if gas leaks and causes an explosion.
As far as I can see the OP shouldn't do it because you have to hold the right qualifications to be legally allowed to touch the gas supply, but the question of whether the speedfit pipe could work hasn't been addressed.
Speedfit pipe is not designed or allowed to carry natural gas. You've linked to a gas explosion caused by something nothing like what the OP is asking about, so it's hardly relevant. We all know what happens if gas leaks and causes an explosion.
As far as I can see the OP shouldn't do it because you have to hold the right qualifications to be legally allowed to touch the gas supply, but the question of whether the speedfit pipe could work hasn't been addressed.
Speedfit fittings are not designed or allowed to carry natural gas.
If you phone the manufacturer they will confirm this.
The only plastic pipe allowed to carry natural gas is the yellow stuff they bury. And it has to be buried. Its not allowed to be used after the gas meter.
So you are asking why he can't use a pipe that's not designed or legally allowed to be used for the purpose he wants to. Perhaps that's pretty self explanatory!
It's been explained before if you actually read the posts here. Gas molecules are smaller than water so can leak because, guess what, the pipe or fittings are not designed for that.
If there was a fire the pipe would melt very quickly and leak.
The link was to show what a gas explosion looks like just in case he was being serious I hoped it may make him think twice about what he was talking about doing just in case he caused a gas leak. The explosion in the link was caused by a leak believe it or not. Not entirely sure that the particulars of the cause of that leak not being identical to the op's scenario are as relevant as the potential outcome.
I'm not advocating the OP do this in any way whatsoever, but I am intrigued as to why it technically wouldn't work. I understand the normal speedfit pipe is not suitable. But the black stuff for compressed air would surely seal adequately? The argument about molecule size becomes null and void as it's designed to carry a compressed gas and the pressure of compressed air lines is far greater than that of a gas main. The risk I can see is that of a fire and the pipe melting. Aside from a fire what would the technical limitations of the pipe be?
Again - not advocating it in any way, and OP, please don't risk it!
Again - not advocating it in any way, and OP, please don't risk it!
james7 said:
daily mail said:
......Hours later the Moodys smelt gas and began searching their purpose built mansion located in the pretty hamlet of Nettleton in the Lincolnshire Wolds.
///someminuteslater.....
While checking out one of the rooms Mr Moody flicked on a cigarette lighter and the flame ignited a massive explosion which rocked the house......
Now, I'm no corgi registered gas safe ninja but f///someminuteslater.....
While checking out one of the rooms Mr Moody flicked on a cigarette lighter and the flame ignited a massive explosion which rocked the house......
k me sideways if that isn't just a little bit 
a7x88 said:
I'm not advocating the OP do this in any way whatsoever, but I am intrigued as to why it technically wouldn't work. I understand the normal speedfit pipe is not suitable. But the black stuff for compressed air would surely seal adequately? The argument about molecule size becomes null and void as it's designed to carry a compressed gas and the pressure of compressed air lines is far greater than that of a gas main. The risk I can see is that of a fire and the pipe melting. Aside from a fire what would the technical limitations of the pipe be?
Again - not advocating it in any way, and OP, please don't risk it!
"not all gas molecules are the same size" Again - not advocating it in any way, and OP, please don't risk it!
Would be a bit of it but they operate at totally different pressures. The speedfit relies in part on the pressure helping the seal and keeping the fitting together. If you look at a speedfit fitting they "pop" out when they have pressure in them. This makes the metal barbs dig into the pipe harder and helps stop the pipe coming apart. If you try to disconnect a fitting with pressure in it you will find its very hard/impossible. Otherwise a gentle knock would be enough to disconnect them.
The airline stuff is designed to operate at their working pressure I guess over 100psi. Gas generally operates at a max of 20mbar which is 0.29psi (according to my calculator!) This is very low and would not make the fitting dig in properly and could potentially fall apart if moved, knocked etc.
Certain types of rubber can only be used with gas. Are the rubber seals in speedfit fittings compatible with gas? Or will they rot after a week or 2?
It kinda all comes down to a totally different thing as to what it was designed to do.
Speedfit say to commission the water pipework:-
"System testing
On completion of the plumbing and heating system it is essential that system checking and a hydraulic wet test takes place. Connections to boilers, radiators and sanitary ware should first be capped or plugged.
Testing should be carried out at 2 bar for 10 minutes followed by 10 bar for 10 minutes."
Not sure what it says for the air version of the pipe but there is no way that it would be a good idea to pressurise the rest of your gas stuff to that sort of pressure ie boilers, cookers, gas meter etc etc.
dave_s13 said:
james7 said:
daily mail said:
......Hours later the Moodys smelt gas and began searching their purpose built mansion located in the pretty hamlet of Nettleton in the Lincolnshire Wolds.
///someminuteslater.....
While checking out one of the rooms Mr Moody flicked on a cigarette lighter and the flame ignited a massive explosion which rocked the house......
Now, I'm no corgi registered gas safe ninja but f///someminuteslater.....
While checking out one of the rooms Mr Moody flicked on a cigarette lighter and the flame ignited a massive explosion which rocked the house......
k me sideways if that isn't just a little bit 
I honestly cannot believe what the OP has suggested. Totally wrong unless you have a death wish for yourself and your family - but self euthanasia is not yet legal in the UK, neither is murder / manslaughter if you happen to blow up your own and your neighbours' houses as a result of your stupidity.
As another GasSafe registered bloke, the reason it's deemed dangerous, as no-one has actually said specifically yet, is that the seals within the push fit fittings are designed to operate at much higher pressures than the 21 mbar that your gas supply should be running at. This goes for both the water and gas fittings. The seals are designed so that the pressure behind them/inside the pipe is what forces them closed. 21 Mbar is not sufficient to ensure a gas tight fitting.
Would/could it seal? Quite possibly. Could it leak in an unpredictable way and fill your house with gas? Yes it could. So it's really best not to.
Would/could it seal? Quite possibly. Could it leak in an unpredictable way and fill your house with gas? Yes it could. So it's really best not to.
james7 said:
Its not allowed to be used after the gas meter.
Not quite true it is allowed as internal pipework as long as it is buried.PE pipe is used for internals when they have a boundary meter for example.The PE is run from the meter underground to property and is then changed to copper/steel.Ohhhh go on OP do it - sounds like an excellent idea - please set up a webcam and record it too -
Id like to post it to this years darwins awards....
Ive worked with many things in my career, big diesels, compressed air, 11kV networks, but gas. Gas scares me proper.
The way gas gets you is that it collects and it gets diluted in an enclosed space. then suddenly you have the worlds biggest single cylinder engine.
Dont dick about with gas systems - you need some gas heating cooking see what you can rent for a bit to get you through. Just dont go using items not designed
for what you are trying to use them for. could even be cheaper to get out and rent a hotel or the like. Just dont go putting in some speedfit compressed air fittings.
rememeber these fittings will require some pressure to properly seal. Your mains gas pressure is only a fraction of that so there is a very big risjk that the seals wont seal properly,
this would result in gas escaping and just witing on some unfortunate spark to ignite.
Id like to post it to this years darwins awards....
Ive worked with many things in my career, big diesels, compressed air, 11kV networks, but gas. Gas scares me proper.
The way gas gets you is that it collects and it gets diluted in an enclosed space. then suddenly you have the worlds biggest single cylinder engine.
Dont dick about with gas systems - you need some gas heating cooking see what you can rent for a bit to get you through. Just dont go using items not designed
for what you are trying to use them for. could even be cheaper to get out and rent a hotel or the like. Just dont go putting in some speedfit compressed air fittings.
rememeber these fittings will require some pressure to properly seal. Your mains gas pressure is only a fraction of that so there is a very big risjk that the seals wont seal properly,
this would result in gas escaping and just witing on some unfortunate spark to ignite.
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