#21
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Hydro welder
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hydro weld1.jpg hydroiweld2.jpg hydroweld3.jpg
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Bill Funk |
#22
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Hi,
I would recommend seeing if they have available tip sizes as listed on the tip size chart from TM Tech, per material thickness. With Hydrogen, use one size larger tip then listed for Acetylene, due to the lower flame temp. My concern would be not having enough BTU's to weld effectively. Tip chart.pdf B
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Bill Tromblay "A sign of a good machinist, is one who can fix his F$@& Ups" My mentor and friend, Gil Zietz Micro Metric Machine. |
#23
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Hi Bill, "18 gauge" is a curve ball for me, at my level of experience. Due probably to aluminum gauge, steel gauge, stainless gauge, B&S wire gauge etc all being different? Is it possible to use something like decimal inch or mm, please? Or a drill size? Torch tip sizes vary in diameter per size from each company, so using tip sizes are unhelpful unless including Mfr. Hypodermics used as welding/brazing tips are probably unfamiliar to most sheetmetal craftsmen - unless they've been exposed to jewelry manufacture, also .... along the way ...? And - O/A gets those skinny tubes REAL hot, super quick.... Probably why hypos are used by O/natgas-propane-propylene-hydrogen more-so than O/A. (Just trying to enhance clarity a wee bit, Bill .... )
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#24
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Sorry, gauge is a medical standard for hypodermic needles. All the ones that have the lure lock taper.
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Bill Funk |
#25
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Oh. Ah, well then it appears to be the Birmingham Wire gauge (derived from Stubbs Iron Wire gauge) and measures the Outside Diameter of the hypo. I guess piercing things needs an O.D. measurement and not the I.D. for measuring the flow of anything. And so, from originating back in the early 19th century we now know the current US medical gauge system for hypodermic needles, catheters, cannulae and suture wires. Who'da thunkit?
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#26
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Not mixing Hydrogen for tig ...NO. Yes, Helium adds an agitating component to the arc, helping the arc to clean the joint and also to push deeper into the molten pool for deeper penetration. Newer machines have an electric setting to do that now, without chemistry. I have a 1980 model "Semit mixer" on the side of my 1981 Miller 250 DialArc, enabling me to mix any two gases at any ratio, at any time. Helium is one, CO2 another, O2 a third .... darn machine never gives me good reason to replace it ... going on - dang - 40 years -???? sheeeesh. But not so "whizzy" - just simply good tig welding practice. (Or maybe the Lear Aviation welder I learnt from had good advice...? And I attended a few Aluminum Association national conferences .... chatted with the guys who write the aluminum welding books ....) I try to get out and around a little ....
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
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