Acetylene welding question

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Steve Jelf
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Acetylene welding question

Post by Steve Jelf » Tue Apr 20, 2021 4:18 pm

What makes a loud POP that sends sparks flying? Sometimes it happens, and sometimes it doesn't, and I'm not aware of what I'm doing differently.
The inevitable often happens.
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Ruxstel24
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Re: Acetylene welding question

Post by Ruxstel24 » Tue Apr 20, 2021 4:24 pm

I assume you’re talking steel rod welding, although brazing is about the same.
If you get the metal or rod too hot, it will pop.
Staying in one spot too long or just too much oxygen can also get it too hot. Or too big of a tip for the metal thickness...lots of variables.


Dan Haynes
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Re: Acetylene welding question

Post by Dan Haynes » Tue Apr 20, 2021 5:36 pm

The gas flowing through the torch tip helps cool it. If it is turned too low, or if working in very close quarters, the tip overheats and the acetylene/oxygen mix detonates. Turn your torch up.
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Mark Gregush
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Re: Acetylene welding question

Post by Mark Gregush » Thu Apr 22, 2021 4:49 pm

If you really want popping, try a rosebud tip that isn't warmed up yet or too little gas flow for size! :lol:
I know the voices aren't real but damn they have some good ideas! :shock:

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Norman Kling
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Re: Acetylene welding question

Post by Norman Kling » Thu Apr 22, 2021 9:05 pm

That's one good reason for wearing welding goggles and long sleeve gloves when you weld. Even more important when you do arc welding. A visor is necessary for arc welding because it can actually give you a burn similar to sunburn.
Norm

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Craig Leach
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Re: Acetylene welding question

Post by Craig Leach » Thu Apr 22, 2021 10:36 pm

Popping is a tip, heat and application issue a fire extinguiser is a good idea and checking for hot spots before you close up shop is a must. practice makes perfect.


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Re: Acetylene welding question

Post by Dan Hatch » Sat Apr 24, 2021 11:39 am

Also is need for check valves at the torch handle. You have not lived till you see torch hoses explode half way to the tanks. And know that is how close you came to a real bad situation. Dan

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Mark Gregush
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Re: Acetylene welding question

Post by Mark Gregush » Mon Apr 26, 2021 12:20 am

Dan Hatch wrote:
Sat Apr 24, 2021 11:39 am
Also is need for check valves at the torch handle. You have not lived till you see torch hoses explode half way to the tanks. And know that is how close you came to a real bad situation. Dan
When I was taking AG shop class, the hose started to burn behind the torch. No explosion.
I know the voices aren't real but damn they have some good ideas! :shock:

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Bud Delong
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Re: Acetylene welding question

Post by Bud Delong » Sun May 02, 2021 9:34 pm

Use a little more acct. If a hose is going to give out it is usually by the torch where it flexes most! Seen it once where a pinhole filled All's coverhauls!! There was a flash and the fire roweled out all's sleeves and pantlegs!!! I did not hurt him but removed a lot of hair!!! Bud. :D


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Re: Acetylene welding question

Post by Dan Haynes » Mon May 03, 2021 3:59 pm

He must have been hairless as a dolphin after the smoke cleared.
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Mark Gregush
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Re: Acetylene welding question

Post by Mark Gregush » Wed May 05, 2021 5:16 pm

Dolphins have hair at birth but soon loose it.
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I know the voices aren't real but damn they have some good ideas! :shock:

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Dan Haynes
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Re: Acetylene welding question

Post by Dan Haynes » Wed May 05, 2021 10:23 pm

Hairless as an adult dolphin, then.
"The further a society drifts from truth, the more it will hate those who speak it." -George Orwell

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Re: Acetylene welding question

Post by RichardG » Thu May 06, 2021 10:01 am

INTERESTING , I HAVE FOUND OVER THE YEARS BY KEEPING THE TIP CLEAN [THAT PACK OF LITTLE WIRE RODS IN THE NEAT COVERING] RUN THE PROPER SIZE THROUGH THE TIP WHEN FINISHED BRAZING, IT ALSO HELPS TO KEEP BACK SO AS NOT TO OVER HEAT THE TIP, A NICE FINE BLUE FLAME ABOUT 1-1/2-INCH LONG PLAYING OVER THE ROD AND THE WELD, AS SOON AS YOU SEE THE METAL FLO MOVE ON WITH THE TIP AND ROD, THE GAS FLOWING THROUGH THE TIP WILL KEEP IT AT THE RIGHT TEMPITURE BY NOT HOVERING OVER THE HEAT OF THE WELDED SPOT.[ I CAN REMEMBER YEARS AGO A CO WORKER WOULD HAVE THAT PROBLEM A LOT,AND THE BOSS WOULD YELL HEY BOB POP ME A BOWL FULL]-THE BOSS WOULD BRING IN A BOX FULL OF COAT HANGERS,, WE USED THEM TO WELD IN ROCKER PANELS ON 55 FORDS---THEY DO MAKE GOOD WELD ON THIN STEEL..I HAD A POLICY NO WELDING AFTER 2 PM,FOR THAT REASON, THOSE LITTLE BEADS OF MOULTEN STEEL FLY UNDER EVERY THING AND FIND A GOB OF DUST OR WHATEVER TO SMOLDER UN SEEN TILL ITS TOO LATE--

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