Near as I can tell, MAPP gas is a wimpy version of acetylene. The little torch set I have in that pic is barely enough to do brazing, and the cylinders don't go very long.

The oxy-acetylene set I have is small, maybe 30 pounds or so, easy to move and carry around in a plastic case. I have a larger acetylene set- the tanks are about two feet tall by six inches wide- but the little set is handier. I even have a cutting torch for it!
( The Resident Loon Not a demographic. Do not measure., Mon 21 Nov 2011, 19:24, 1 reply)

Gas axing FTW!
;)
( blaireau69 , the Cumbrian Travis Bickle., Mon 21 Nov 2011, 21:14, closed)

I've only used the cutting torch once
and have since found out that I wasn't really doing it quire right. I intend to get hold of some scrap iron and practice a bit.

I've also recently obtained a small portable forge, about three feet across on pipe legs with a hand cranked blower. Next thing will be to get some coal and an anvil and see what I can bash out of scrap iron!
( The Resident Loon Not a demographic. Do not measure., Mon 21 Nov 2011, 22:01, closed)

Gas axing indeed.
If you're cutting in from an edge, make sure the cutting stream is slightly off the workpiece and angled down and away when you trigger it, or you'll get white hot iron in your socks/eyes/fly.

If you're cutting round pipe, chisel a notch to start on and let the hole blow clear before you cut in.

Thick iron and cast pieces: start at the bottom and let the stream blow the melt clear at 60 degrees. Run the mixture slightly rich, or it'll spark like a bastard as old cast iron has lot of graphite in it.

HTH.
(all my scars face forward possesses 2.5% of a hyperalloy combat chassis, Tue 22 Nov 2011, 23:51, closed)