Thank you for sharing. We heat rims all the time to get them off the rear hubs on Ford 1 tons. I had no idea this could happen.
Thank you for sharing. We heat rims all the time to get them off the rear hubs on Ford 1 tons. I had no idea this could happen.
Last edited by OFF; 04-07-2010 at 11:57 AM.
In Australia safety bulletins and incident reports are passed around different mines on a regular basis to educate people and make them aware of hazards that they would not normally associate as being one. Guaranteed, every couple of months there’s one there about someone being seriously injured or killed by heating or welding on a rim.
The last one I saw was pretty horrific, looking at the photo's you'd swear there were two people involved, but upon closer inspection you can actually see it's just the torso and legs of one man on different sides of the workshop.
Slightly different to heating and welding on rims I know, but most mines these days park the fleet up if lightening strikes within the open pit boundary. I’m sure you’ve all seen the photo’s on why they do this.
fortunately we did not lose the Swamp loggers last night ,when they modified wheels
Handle every stressful situation like a dog.
If you can't eat it or play with it,
Just pee on it and walk away.
I was thinking the same thing, they were torching, grinding, welding. should try to send them the link somehow.Originally Posted by OneWelder
did the welding thing on a ford rim 4-5 years back with just the air out. didnt know about this until about 3 weeks ago. i guess i am still here for a reason. nothing happened but NEVER again.
This is also why tires will explode after lightning strikes or contact with powerlines. The most important thing i saw in the film is:
http://www.osha.gov/Publications/OSHA3086/osha3086.html
Heat must not be applied to a single-piece wheel.
Cracked, broken, bent, or otherwise damaged wheels must not be reworked, welded, brazed or otherwise heated.
Cracked, broken, bent or otherwise damaged wheel components must not be reworked, welded, brazed, or otherwise heated. Heat must not be applied to a multi-piece wheel.
If your wheel has ANY defect it must be discarded, NO repairs to wheels are allowed.
IBT local #174
I forwarded this vid to the goodsons.
Lee,
Thanks for sharing I have welded on a few wheels will make sure to never do again unless tire is not mounted.
I guess OSHA is saying that wheels must be scrapped if it needs welded. I wonder if this has to do with heat treatment or what. Does this mean you can not "heat" wheels to have them powder coated?
IBT local #174
Well TD25c,either your luck is running out or your just ignorant.Safety Film
The Bridgestone film was interesting,I dont believe the tire would blow that fast as in the film, they only welded for 10 or 12 seconds on the wheel.No doubt if you welded long ,or heated enough the tire will finally blow,but not in that short of time.I just dont buy it.It's a safety issue for sure, but I dont deflate a tire just to put some heat on a stuck stud or nut .They also left out the danger of using starting fluid to seat a tire bead.
What you need to realize is the heat applied by the few moments of welding is not the cause of the tire blowing but the cause of the "pyrolysis".The condition of pyrolysis (sp) occuring being the reason the internal temperatures rose so fast leading to the tire blowing.
Did you look at the temp gage? 200-300-400-600-900-1100-1400 BOOM.
Do yourself a favor and 'study' the video.
Happy to be considered rude & obnoxious if it means someones the wiser(safer),Jay.
You are exactly right, I also had my doubts about the whole thing until i looked up pyrolysis and did some reading. http://en.wikipedia.org/wiki/Pyrolysis
The welding heat sets off a chain reaction that is why this is so dangerous. Basicly the welding is like applying heat to a match head. The match head being the internal rubber in the tire, "organic material under pressure and heated" is what starts the process of pyrolysis.
Now that you think about it this is why tires explode from lightning strikes and powerline crane accidents, the internal tire is heated by the electricity.
http://www.miningmayhem.com/2010/09/...ar-dumper.html is an example.
IBT local #174
I really don't want to watch it.
I recall a similar video from Canada. Welded a excavator wheel, all was fine until the welder attached the air chuck and added air to the super heated interior, the tire exploded and fragmented, killing the welder.
Dirthauler:
The link to the truck struck by lightning is amazing.
Thank You. I knew the welding, and the power line strikes, but had not htought about lightning doing that to a tire. Those haul truck tires do serious damage!!! Broke 57 1" bolts!!!! Wow
Jerry
I was thinking about this today, it took 2 mins for the tires to explode. If you saw the truck get hit by lightning and walked over to see if everything was fine, that would be about the right amount of time to be in the wrong place at the wrong time.
Threw a 3600lbs wheel hub 300 feetAND broke the 57 1" grade 10 bolts? SCARY STUFF!!!
link again for those who missed it
http://www.miningmayhem.com/2010/09/...ar-dumper.html
IBT local #174
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