just courious.....

[jaci]

Why does a HH get all dragon breathey every now and then with straight propane, but a o2/propane mix (on say a lynx)does not???
I would think that because it is a surface mix this would not prevent stuff from comming through the hoses..... OR does this actually happen, but we dont hear it so much....

I really was just wondering about this torching today... just popped into my head..... 8) #-o#-o#-o
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[kbinkster]

What do you mean by "dragon breathey?" What's it doing?

[earlbacher]

if you dont clear the line out after a session, the next time you fire it up, it does the "dragon breath"....
fire it up and get a normal flame, two seconds later flame doubles in size... pretty wild the first few times it happens...

[Dale M.]

This article is probably best explanation about what is cause for "dragon breath"...

http://www.artglassanswers.com/forum/viewtopic.php?t=219

There has been other theories as "dirty propane" but it does not prove out, and some have blamed the ethyl mercaptan, the odorant in propane, but there is only 1 pound of ethyl mercaptan per 10,000 gallons (or 42,500 pounds) of propane, so that does not satisfactory explain "dragon breath".

Dale

[jaci]

I don't have a big problem with this and handle it well, however while taking care of this nussance i wondered.... does this happen in other torches? or is it a HH thing.... AND if it does not happen in other torches, such as minor, mini cc lynx etc., why???? it's all propane? right?

Dale thanks for the link. It has been a wealh of knowledge for me in the past and the welding shop guys finally realized what i was talking about!!! lol
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[navarre]

A primary difference between the HH and other torches mentioned is that the HH runs on tank pressure - whereas all the others have a regulator in place reducing the pressure to the torch.

[jaci]

oh, that sounds logical!!! lol ..OK thanks for that answer!!!!
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