oxy acetylene

[jonjoe]

i know it sounds a bit stupid


but if you burst a pipe would the whole thing not just blow up

 

[astro_al]

Burst a pipe where? Under what conditions?

Things don't generally 'just blow up'. You could have a leaking fuel line which would give a flame like water leaking from a cracked hose, but not mega hot as there is no oxygen mixed in with it. It all depends on what you mean.

What is the difference between a 'burst' and the hole at the end of the hose, for example.

Care to elaborate?

Al.

 

[jonjoe]

okay your working your pipe get spilt on a piece of metal and cacthes fire

 

[backpurge]

The flashback arrestor will stop the flame getting back into the regulator, the leak in the hose will keep burning until you turn the cylinder off

 

[jonjoe]

so like oxy acetylene isnt that dangerous

 

[backpurge]

If you follow the rules it is perfectly safe, if you don't you can die

It isn't rocket science

 

[Spark plug]

This exact situation happend to me a few months ago. Pipe burst caught fire, I Calmly put the torch down walked to the bottles and turned them off. No harm done, repaired the pipe and carried on. But prevention is better than cure I check my pipes now and then, when the start to perish they get replaced.

When I first started out I used to get second hand pipes but they caused more problems than I saved so its new pipes only now.

 

[backpurge]

You did everything right apart from repair the hoses, if they get damaged you are supposed to replace the complete hose. If you have an accident with them and H&SE get involved they'll take you to the cleaners

 

[dannyp]

really what's wrong with repairing a hose ?

as long as you use a proper insert and crimp the ferrel down right whats the differnace between the join and the fittings on the ends of the pipes

 

[Lawnmowerboy]

Not a bit of copper pipe and a couple of jubilee clips like we did?! , Only on propane and o2 I thought copper and acet was bad?

 

[pedrobedro]

Not a bit of copper pipe and a couple of jubilee clips?! , Only on propane and o2 I thought copper and acet was bad?

Where did the copper pipe come in, did I miss an edit ?

 

[Spark plug]

Not a bit of copper pipe and a couple of jubilee clips?! , Only on propane and o2 I thought copper and acet was bad?

No cut the hoses down 6' past the burst and re fit the ends.

 

[Lawnmowerboy]

Is there anything wrong witht he bit of copper pipe as a joiner, Providing it's a push fit in the pipe and clipped securely? Still probarbly against all sort of rules

 

[backpurge]

Firstly a bit of copper pipe has always been a no no, you should only have used correct fittings.

But apart from that, according to BCGA unless you can carry out the repair to ISO 3821 and more importantly, have documented proof that you have, you need to replace the complete hose. The days when you could buy lengths of hose without the fittings on and make up your own kit are long gone

 

[PTvor]

Is there anything wrong witht he bit of copper pipe as a joiner, Providing it's a push fit in the pipe and clipped securely? Still probarbly against all sort of rules

It's definitely dangerous to have copper in contact with acetylene. It can form a sensitive high explosive, and since acetylene is only just about stable it can set that off too.

http://en.wikipedia.org/wiki/Copper(I)_acetylide

 

[Tiggy_dorset]

It's definitely dangerous to have copper in contact with acetylene. It can form a sensitive high explosive, and since acetylene is only just about stable it can set that off too.

http://en.wikipedia.org/wiki/Copper(I)_acetylide

That is a very useful bit of knowledge to know, thanks.

 

[Lawnmowerboy]

Is it the same with propane?

 

[brightspark]

Is there anything wrong witht he bit of copper pipe as a joiner, Providing it's a push fit in the pipe and clipped securely? Still probarbly against all sort of rules

if the hoses were that bad and needed joining just put them in the bin. ive got the same set on my bottles after 20 years . they perished on the end hanging of the regs . 3 inch was cut off them and there still in good nick . i have a new set but no point in changing them when nothing wrong with the old ones , dunno where u get your idea of bodging copper pipe in from ive had a propane pipe leak and flare up in a small shed to a burner a nice red face and no eyebrows and burnt hair before it was shut off . so check your hoses regular

 

[PTvor]

Is it the same with propane?

No. Acetylene molecules are odd because they have a carbon-carbon triple bond which very easily breaks up releasing heat, causing more acetylene molecules to break up. That's why it can only be compressed to a limited extent and why it's dissolved in acetone in the cylinders. It also means acetylene reacts with all sorts of things at room temperature, metals, plastics, etc.

Propane is more like natural gas, it doesn't explode when you compress it, it doesn't react with all sorts of things, and it is plumbed with copper as far as I recall.

You really ought to use the correct fittings and hoses in good condition and follow the procedures for all these gases, but you especially follow the book with acetylene.

 

[cutandshut]

I thought acetylene welding and cutting nozzles were made of copper!