Cheaper Oxy acetylene source?

[Nick HughesParticipant @nickhughes97026]

Posted by Russell Eberhardt on 03/06/2017 08:17:54:

Posted by Nick Hughes on 02/06/2017 20:30:22:

Hi Russell,

It's Propylene.

Nick.

Thanks. So, it's the same as the current formulation of MAPP gas.

Russell

I've just checked the label on my bottle and it's pure Propylene, not a mixed MAPP gas.

Nick.

[MWParticipant @mw27036]

Posted by Nicholas Farr on 01/06/2017 23:00:55:

Posted by Michael-w on 01/06/2017 14:16:58:

Posted by JasonB on 01/06/2017 13:38:36:

Michael, any chance of a photo of the welds, I had always thought these sets were not upto welding well not unless you include lead burning in that. Cup don't seem to say it can be used for welding?

Sorry i'm using weld out of context, I've actually hard soldered, I can show pics of that but not true welding I suppose.

snip

I have used it to cut through (gas axe) 3mm mild steel, you need goggles for that though and it works. So I presume it could weld?

Could even put up a video if I knew how and show you it cutting through a piece of scrap!

Michael W

Edited By Michael-w on 01/06/2017 14:22:02

Hi Michael-w, gas welding and gas cutting are quite different from each other.

Regards Nick.

Ah, I think i'm showing my inexperience there! Thanks for explaining it to me, yeah it does work exactly as you said, go to cherry red and the oxidizing flame starts to push the slag to one side, with plenty of sparks.

Michael W

[Tim StevensParticipant @timstevens64731]

Anyone claiming (as quoted above) that a temperature is twice as hot as something else needs to learn some basic physics.

Look at the three temperature scales in modern use – and take a figure such as 10 degrees. Twice as hot would be 20 degrees, you might imagine, but this gives quite different real temperatures in each case. Now try it with a below zero figure … Twice as hot as -10 is, in F, C, K, respectively, verty cold, quite cold, and impossible.

Unless, of course, the text came from a politician or a marketing person, then you would know it was a load of testicles, of course.

Cheers, Tim

[Antony PowellParticipant @antonypowell28169]

Hi Andrew

That's a cut and paste directly off their site

personally I don't notice any difference

tony

[Ian S CParticipant @iansc]

Acetylene; 1475 BTU per cu ft, temperature 3482*C. Oxygen to gas ratio 1:1

LPG; 2500 BTU per cu ft, temperature 2699*C. Oxygen to gas ratio 4.5:1

Ian S C

[Nicholas FarrParticipant @nicholasfarr14254]

Posted by Ian S C on 04/06/2017 11:53:54:

Acetylene; 1475 BTU per cu ft, temperature 3482*C. Oxygen to gas ratio 1:1

LPG; 2500 BTU per cu ft, temperature 2699*C. Oxygen to gas ratio 4.5:1

Ian S C

Hi Ian S C, I don't know where you get 3482 *C from, I've always known it to be 3100-3200. BOC says it is approximately 3150 when used with Oxygen **LINK**

It is still the only gas flame that can weld steel, properly.

Regards Nick.

[Author]

Posts