Why You Should Never Weld a Rim with a Tire Mounted - Fiberglass RV


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Old 08-09-2013, 12:50 PM   #1
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Why You Should Never Weld a Rim with a Tire Mounted

Interesting video, if you have not seen it, this is about how a tire can thermally run away with a small initial heat source like a weld arc.

Wheels of Fire Training Video - YouTube
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Old 08-09-2013, 01:09 PM   #2
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Wow..that is very interesting Thomas. The point about the danger of using a torch to remove lug nuts is particularly interesting - I've seen that done so many times.

Thanks!
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Old 08-09-2013, 01:23 PM   #3
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Thanks for sharing that Tom.
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Old 08-09-2013, 01:44 PM   #4
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The amazing thing to me is how little it took to initiate the process (just a fraction of a second of arc welding).
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Old 08-09-2013, 02:27 PM   #5
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That was incredible.
I was going to stop when it exploded, but the whole thing needs to be seen.
Hope this doesn't make me paranoid.........LOL
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Old 08-09-2013, 02:28 PM   #6
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The dragging brake shoes/chemical pyrolysis connection got me thinking about all those cheap Chinese "bombs" alleged to go bang on the road. Would a hot drum be more likely to cause a blowup when stopped? Would the blowout usually occur in sidewall or bead or as tread separation? Could blowouts be attributable to factors other than overloading, under-inflation, sidewall flex, UV deterioration of tire compounds? Is there a smoking gun here that hasn't received adequate attention?

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Old 08-09-2013, 02:32 PM   #7
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It definitely got my walnut brain to thinking also Jack.
That's why that information was "incredible" to me.

And the comments underneath the vid was something.
One guy says he deflates his tires, does not use a welder,
BUT heat with a gas torch................Guess he missed the
second half of the video?
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Old 08-09-2013, 02:46 PM   #8
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I sent this to my husband who is a Safety Manager in Montana in the Oil Patch.
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Old 08-09-2013, 03:17 PM   #9
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Quote:
Originally Posted by rabbit View Post
The dragging brake shoes/chemical pyrolysis connection got me thinking about all those cheap Chinese "bombs" alleged to go bang on the road. Would a hot drum be more likely to cause a blowup when stopped? Would the blowout usually occur in sidewall or bead or as tread separation? Could blowouts be attributable to factors other than overloading, under-inflation, sidewall flex, UV deterioration of tire compounds? Is there a smoking gun here that hasn't received adequate attention?

jack

Jack,
I suspect that the answer to a lot of your questions is yes. Overloading, under-inflation, sidewall flex all create a heat build up. UV deterioration I believe would lower the temperature that failure is likely to happen.

I was following a flat bed truck a couple months ago when the right rear tire blew up. I don't think the driver ever knew it, the front of my truck got hit by a large piece of the tire. It was a glancing blow and no damage done. Tire explosions I think happen more than we know about. Just look at the amount of tire pieces along any freeway.
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Old 08-09-2013, 04:08 PM   #10
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Most of those tire pieces on the roads (road alligators) are the tread from recap truck tires. Many trucking companies will run recaps on the drive axles and on trailers. They usually come apart when overheated from being run flat. I have heard of truck tires catching fire from overheating, usually from a brake problem.
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Old 08-09-2013, 05:53 PM   #11
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My husband says he will be using this in a safety meeting.
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Old 08-09-2013, 07:51 PM   #12
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Quote:
Originally Posted by Cyndi B. View Post
My husband says he will be using this in a safety meeting.
Good for him Cyndi............Everyone should at least have a taste
of this food for thought.

On the semi-trucks, some of the companies ran recaps on the drivers
and trailers but thankfully they would only run New tires on the steering.
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Old 08-09-2013, 09:46 PM   #13
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I'm not sure that it's even legal to run recaps on the steer axle. I know company policy was to not do it, and we would only cap a tire a limited number of times and then scrap it.
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Old 08-10-2013, 08:07 AM   #14
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Quote:
Originally Posted by mary and bob View Post
I'm not sure that it's even legal to run recaps on the steer axle. I know company policy was to not do it, and we would only cap a tire a limited number of times and then scrap it.
That was probably the case.
"Sometimes" the employee is not that much of a factor.
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