So, oxy propane peeps, what sort of supply pressure settings and flame sizes are you using? Oh and nozzle/tip sizes too?
I've been using the smaller of the tips that came with the Weld-Equip kit, think its a #3, I've been setting my regulators to give me between 1 and 2 bar supply pressure and I've been using a flame that's probably about 10-15mm inner cone with the feathery outer flame around it.
Matt from Rothair Cycles had me over to his workshop yesterday for a wee fillet lesson and he has his (oxy/acet) torch set up so differently.
He was using a higher supply pressure, 4 bar I think, a #1 tip (though he did say he'd sometimes use a larger tip for fillets) and an absolutely tiny flame, like 3mm of inner cone probably. His torch was almost silent whereas mine is roaring when I'm using it.
I did a fillet at Matt's last night and while there was still plenty to be working on, it was the neatest joint I've made yet by quite a margin.
I'm hoping I can get a couple practice miters filed while I'm at work today and can have a bash at brazing them with my torch set up more like his tonight but I'm worried that I'll not be able to replicate what I did last night with my cooler oxy/pro flame.
I also found it interesting last night that Matt purges his pipes at the end of a brazing session but doesn't touch his regulators. I'm sure I'd read that it was good practice to back the ajusters off till there was no resistance felt so I've been doing this after every session. Matt also has a day job at Shand by the way so I presume they must be treating their regulators similarly, makes me think what I'm doing is a bit ott.