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Old 04-13-2012, 07:40 PM   #31
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oxyacetalene ! Not mapp or a a32 tip on a b tank. Were talking 4 inch? I mean you might be able to fight through a single joint but if your brazing get the right tools
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Old 04-13-2012, 07:46 PM   #32
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I agree if your doin a lot of brazing. But the other day i brazed a 4" 90 45 and companion flange with my ga 32 and a b tank. It takes a bit longer that way but it would have taken too long to get the welding trailer from the shop
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Old 04-13-2012, 08:45 PM   #33
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When we ran med gas, we used a32 with an acetyline tank. Theres a special adapter that lets you use the bigger tanks with your torch. Never tryed with the other way though.
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Old 04-13-2012, 09:01 PM   #34
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I Use the a 32 and an a- tank for t drills but its not physical 4" joints, just t drilled into 4 inch pipe and its the branchs
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Old 04-13-2012, 09:10 PM   #35
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Make sure you have your tubing cutters for cutting 4"......
The copper in the pic is 2".
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Old 04-13-2012, 09:21 PM   #36
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Dam Tommy how old are those ??
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Old 04-14-2012, 01:26 AM   #37
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Quote:
Originally Posted by Adamche
We silver braze all the time, use oxy acetylene kit tip size 20. Keep fittings clean, if using brass, use the correct flux( it is a white paste). And if possible use 15% silver solder. Preheat any brass fitting. You will struggle to do it with a turbo torch or mapp gas
Amen brother we only braze in the great land of oz! 20 tip does 8 inch type L copper if you have it crankin biggest I've done
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Old 04-14-2012, 11:38 AM   #38
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Quote:
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Dam Tommy how old are those ??







I don't know...(shrugging shoulders). I bought them used from someone years ago.
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Old 04-14-2012, 01:25 PM   #39
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Even If I knew I had a single 4inch tee not just a 1 inch branch t drill but a full 4 inch fitting to braze I would not leave home without oxy acetalene. Now if it just comes up un planned I might try something else. But if your brazing above 2 inch try to plan your work. Ive had to braze 3 inch with a #32 tip turbo and it sucks and is very unproductive if you have multible joints. Unless its an emergency I can see no reason to attempt
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Old 04-14-2012, 08:30 PM   #40
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Quote:
Originally Posted by rlove250
So we are still not successful. We are using a no 10 rosebud tip with fuel at optimum mix. Just not getting hot enough and it is leaving a thick layer of carbon on the pipe. Any thoughts?

its not mixing right...wat color is that flame....brazing copper to copper or brass?
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