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Oxy Acetylene or Oxy Propane?

Is Oxy Propane suitable for Boiler Work?

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Brian H01/10/2018 08:57:53
2312 forum posts
112 photos

I've been hanging my nose over oxy acetylene sets for silver soldering copper stays in confined areas such as inside the firebox.

I could just go down the ME Club and use theirs but sometimes it's just handy to have your own equipment.

I've read that house insurance may not be possible with acetylene and so wondered about oxy propane.

Does anyone have any experience on this?


not done it yet01/10/2018 09:14:00
6808 forum posts
20 photos

Search the net? No contest. Only one really sensible option, IMO.

Try this. There will be lots of others.


Might need more heat, but not hotter.

AJW01/10/2018 09:17:48
377 forum posts
137 photos
I have used oxy propane for years and although never in a firebox it has been used in similar situations and find it works very well.
I have also used oxy/mapp gas for steel welding, which has also worked well.
Can't remember the make of my torch offhand but it is an Australian manufactured handset, I'm sure a BOC one would work just as well.

Ady101/10/2018 09:35:38
5089 forum posts
736 photos

The problem with acetylene is twofold from an insurance viewpoint

1- It burns at at least 2500 centigrade which is pretty amazing

2- It's ignition lower and upper flashpoint goes from 2.5% to 95%, so if you get any sort of leak it's going to ignite

So it's hairy stuff to have lying about

Ian S C01/10/2018 09:50:00
7468 forum posts
230 photos

Just did a oxy LPG set up for the Menzshed last week, have not used it yet, I'll see what tomorrow brings.

Ian S C

Matt Harrington01/10/2018 11:03:41
187 forum posts
7 photos

I have had no regrets from moving from acetylene to propane. I changed the handset but some people don't even bother doing that!


Alan Waddington 201/10/2018 11:29:53
523 forum posts
88 photos

Another consideration, especially if full size is the weight of the bottles, Acetylene bottles are stupidly heavy.

JasonB01/10/2018 11:35:44
22744 forum posts
2653 photos
1 articles

Same could be said for 47kg propane bottles which all up are just under 100kgwink

simon Hewitt 101/10/2018 12:20:14
43 forum posts
8 photos

Any advice on what size? home or 'trade' kits with disposable cylinders are quite reasonable and very portable, but the replacement cylinders are £18.50 each (on one web site). How long would they last? And how hard to use a 9KG Propane bottle?

Peter Sansom01/10/2018 12:35:12
109 forum posts
2 photos

Oxy Acetylene is a hotter flame than Oxy Propane

About the only thing that Oxy Acetylene is necessary for is Oxy welding. You won't get a hot enough flame when using welding.

If you want to cut, braze including silver brazing then Propane is good. Propane is also more economical to use.

Mick Henshall01/10/2018 13:01:16
561 forum posts
34 photos

I have a number of oxy acetylene torches including welding/cutting and lightweight all with their nozzles. I also use propane wit sievert torch. Been thinking of getting acet again but can I use the oxy/acet torches with propane?


GoCreate01/10/2018 13:10:46
387 forum posts
119 photos

I use a rent free oxy bottle for my oxy propane set-up, in the long run I believe it will be more economical and would recommend giving this consideration. You pay a refundable deposit on the bottle, a oxy refill costs around £35 for a 9 litre bottle. My local auto spares supplies rent free welding gas and oxy. For hobby use you can expect one 9 or 10 litre oxy bottle to last a considerable length of time, after 1 year or so I've used 1/4 bottle. I mostly use my oxy propane for small fabrications and hot metal forming but have used it alongside a propane torch to silver solder a copper vertical boiler.

I did have an oxy propane set using disposable cylinders but found it too expensive to use regularly, this was some time ago though.


John Reese01/10/2018 14:49:52
1035 forum posts

I have used oxy-propane and oxy-natural gas for cutting, brazing, and heating for many years. For cutting and heating the tips are different from those used for acetylene. When using a normal welding tip I find it takes a bit of finesse to keep the flame from blowing off the tip when first adjusting the flame.

Brian H01/10/2018 14:52:29
2312 forum posts
112 photos

Many thanks for all the helpful replies, is a special torch required or is it just the nozzle sizes?


fizzy01/10/2018 18:39:34
1843 forum posts
120 photos

I use oxy-prop in the business of making steam engine boilers commercially. I used to use acetylene but the price is prohibative to say the least, then there are the insurance considerations and god forbid there should ever be a fire resulting in the whole estate being shut down for 48 hours while the bottle cools! Same fittings, same torch, flame not as hot or stable but complete no brainer for me.

JasonB01/10/2018 18:43:03
22744 forum posts
2653 photos
1 articles

I beleive the hoses should be changes as there is something in Propane that can attack the lining of Acetylene hose so get an orange hose not red.

Mick Henshall01/10/2018 20:01:32
561 forum posts
34 photos

I think the hoses are rated type T for propane and type R for acetylene, this courtesy of YT, done a bit of research and seems I can use my oxy/acet torch but need to get a dedicated cutting nozzle for propane


Paul Janes01/10/2018 20:37:04
16 forum posts
2 photos


I use Oxy/Propane with standard nozzles and also a big heating torch but it requires a different regulator. For welding steel, I use Mig, Tig or stick.


Edited By Paul Janes on 01/10/2018 20:38:22

Neil Wyatt01/10/2018 20:52:07
19032 forum posts
734 photos
80 articles

Anyone (Fizzy?) interested in writing me an article about using oxy-propane in the home workshop (or it would be outside in a sheltered spot in my case, if I had the oxy bit)?


Ron Laden02/10/2018 13:57:33
2298 forum posts
452 photos

Excuse my ignorance and I dont want to get off track but can someone explain MAPP gas and if it has uses in the model workshop..?

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