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16th Dec 2017, 03:50 PM #16
I have done it so many times I plain forgot to write it in the description.Sorry about that!
Set up your acetylene gauge as described. Let the acetylene blow into the palm of your hand. Using the oxygen gauge adjust the oxygen pressure until that pressure is the same as the acetylene pressure was on your palm.
It is pretty accurate and was taught to me by an old fella that had forgotten more about oxy-acetylene welding than I'll ever know.
He used to weld up model sailing ships out of plate using the oxy filler wire as the rigging.The reduction in pressure of the welding flame reduced the size of the flame envelope and therefore less heat from the volume of the flame was available to distort the metal.
With that, he was able to tack the cross steps on the rigging which was 1.6mm filler wire. Cleaned up the half sectioned model was painted with a copper paint and clear lacquered.He got between $20 and $40 dollars for something that basically started out as 1.6mm plate and wire.That was his beer money.
Grahame
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16th Dec 2017, 05:36 PM #17Most Valued Member
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16th Dec 2017, 05:45 PM #18
I had always used no more than a single turn. It is approx 5 psi but there's a pressure point you should not go below as otherwise, the odd spark goes up the nozzle tube as there is insufficient pressure to prevent it. That's when the torch backfires and makes life interesting.If the torch is starting to bang and pop, increase the regulator pressure( just a lil bit -at a time).Thinking about it,the stainless steel should not spark as much as steel tends to do.
Grahame
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