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  • Defect in MAPP bottle/ torch heads

    Ran across this while looking something else up. Can't believe that it isn't out there more.
    Information on defects with a Bernz-o-matic torch head and certain MAPP gas bottles. With a link to the website with the info and photo's Be forewarned that they have a number of graphic photo's of the injuries, from 3 of the parties.

    Bernz-o-matic torch MAPP injuries link

    They are rebranded under a number of different names.
    MAPP Gas Cylinder and Torch Injury Database
    (Bernzomatic, Worthington, Lenox, Ace, Sears, Thermadyne, etc.)
    Glen
    Been there, probably broke it, doing that!
    I am not a lawyer, and never played one on TV!
    All the usual and standard disclaimers apply. Do not try this at home, use only as directed, No warranties express or implied, for the intended use or the suggested uses, Wear safety glasses, closed course, professionals only

  • #2
    Wow only 15lbs to snap the top off a disposable propane bottle? What is it held on with, chewing gum??

    Im really careful with bottles but I would of expected MUCH more force to damage a propane bottle, like 50lbs+
    Play Brutal Nature, Black Moons free to play highly realistic voxel sandbox game.

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    • #3
      There are some aspects of the site statements that still just don't add up for me. The lock button as "defective design" for instance. Why is holding the torch part and accidentally bumping the cylinder preferable to holding the cylinder and bumping the torch? No matter where you hold it, the other part can get hit, it's unavoidable.
      .
      "People will occasionally stumble over the truth, but most of the time they will pick themselves up and carry on" : Winston Churchill

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      • #4
        I take this sort of information with a grain of salt - The site looks to be trying to talk up a lawsuit/ class action against the torch manufacturers, hence talk of defects and 'dangerous' product.
        If you think about the number of these torches that would be in use world wide, if the design was as bad as the site suggests there would be recalls all over the place.

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        • #5
          Looks like a fishing expedition to me.

          Under contact info:

          Law Offices of Andrew W. Shalaby

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          • #6
            Logic is a wonderful thing, when applied.

            However, in all cases posted in this website, no fracture groove has ever actually fractured.
            I am sure that is true. Why would they post anything about it working as intended? The real question is how often does it fail to work.

            Bernzomatic and Worthington have been asked to review the disclosures on this website and advise if any of the expert findings, including their own experts' findings, are in dispute.
            Of course not. The web site is not a legal document. The only action they are likely to take is to seek an injunction to have it taken down.

            There is much more but one thing is interesting. The statement that it takes "only" 15 foot pounds of force to bend the bottle does not reveal how much force that really is. At a distance of 1/2" from the neutral axis of the fitting on the top of the bottle that equals a strain of over 3000 psi on the metal surrounding the fitting.

            What is really going on in this case is that the person that has created this web site is a lawyer that injured himself while trying to start a bonfire using the torch. He used the tip of the torch to try and move a log which caused enough bending force to damage the cylinder body which caused a leak. The defendants (Bernzomatic et al ) contend that he then dropped and kicked the torch which then entered the fire and exploded.

            The testimony of his expert witness demonstrates that it takes over 150 lbs of force applied at the neck to damage the bottle fitting enough to cause it to fail.

            http://www.mappgasinjuries.com/linke...203%20decl.pdf

            It seems to me to be a case of trying to transfer the blame for his actions to somebody other than himself.
            Free software for calculating bolt circles and similar: Click Here

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            • #7
              Hmmm, Actualy apon reading that doc I got the overall impression that a 'proper' tank withstands 150 foot pounds of force before failure, starting to 'deform' at 15 foot pounds.

              The safty feature on the torch triggers around 26 pounds.

              As the bottle failed without deforming as others did at 15 foot pounds, the bottle is at fault due to poor construction, failing at *less then* 15 foot pounds.

              I don't know why he is trying to blame the torch.. Unless the gas bottle he bought is some chinese company, As there is two 'failed' bottles listed there.. one bezomatic, another some other companys.
              Play Brutal Nature, Black Moons free to play highly realistic voxel sandbox game.

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              • #8
                Maybe not really related, but I just threw away a MAPP gas cylinder a week or so back because it was leaking with the head on. Not the head, works fine on 2 other cylinders, but that one leaked bad enough I could smell it, and then looking closely, could SEE it. However, I did not notice a crack/leak as indicated. Nothing visibly wrong with it, and it was maybe 90% consumed without having noticed any leaks or problems (always stored head off). Always check for leaks!
                Russ
                Master Floor Sweeper

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                • #9
                  15 foot pounds is a force of 15 lbs applied at a distance of 1 foot from the neck of the tank. That is the same as 150 lbs applied at one tenth of a foot from the tank. Also, the torch nozzle isn't one foot long so it would take more than 15 actual pounds of force at the tip of the torch to deform the tank. Further, the fracture groove isn't at the neck of the tank so if it is to be tested for breaking at 15 foot pounds then it must be supported at the fracture groove, not the tank.
                  Free software for calculating bolt circles and similar: Click Here

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                  • #10
                    Oddly, I've found that most tanks large and small do tend to smell when they are nearly empty, could never figure out exactly why that would be though. Used to heat with propane, and that was always my signal to call the propane distributor to refill the tank, no calendar needed. If I smelled the tank when I was near it, I needed a refill.

                    I also had the impression when reading that site that it was a fishing expedition. Never was a 'fan' of class action suits. Too often they're started by some brain dead moron doing exactly what they're told not to do, that ends up making everyone with a functional brain pay for their stupidity.

                    That's not to say I don't approve of product safety, But I don't believe in rewarding stupidity

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                    • #11
                      It isn't a class action suit. This guy is a victim of himself and he is looking for other Darwin runner ups to help support his case. He alone is trying to sue Bernzomatic, Home Depot, Rubbermaid ??, and the bottle manufacturer. In return they are suing him for being a pest.
                      Free software for calculating bolt circles and similar: Click Here

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                      • #12
                        What I take away from all this is that there is a failure mode. Probably related more to abuse than design or manufacturing defect.

                        I have the model of the torch in question, not to mention numerous tanks, MAPP and propane, from a variety of manufacturers.

                        I will excersize a little extra care in the future, but will continue to use the torch.
                        Weston Bye - Author, The Mechatronist column, Digital Machinist magazine
                        ~Practitioner of the Electromechanical Arts~

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                        • #13
                          I used to mold parts for Bernz at *arbec. They are VERY VERY picky about their incoming parts... at least they were in 2000.

                          I have an oxygen-MAPP torch, three propane Trigger Torches and a locker full of MAPP and Propane. I keep the oxygen in a separate part of the plant.

                          What I am getting at, I'm a happy customer. I've never blown myself up, anyone else or had a torch fail on me.
                          This product has been determined by the state of California to cause permanent irreversible death. This statement may or may not be recognized as valid by all states.
                          Heirs of an old war/that's what we've become Inheriting troubles I'm mentally numb
                          Plastic Operators Dot Com

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                          • #14
                            Originally posted by Liger Zero

                            What I am getting at, I'm a happy customer. I've never blown myself up, anyone else or had a torch fail on me.

                            *knocks on wood*

                            Of course saying that I'm going to blow my left testicle off with one today, amirite?
                            This product has been determined by the state of California to cause permanent irreversible death. This statement may or may not be recognized as valid by all states.
                            Heirs of an old war/that's what we've become Inheriting troubles I'm mentally numb
                            Plastic Operators Dot Com

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                            • #15
                              I have a friend in the UK that wanted to check it out. Yes the bottle was empty.
                              Here is Rob's photo's, and my thanks for letting me use them!
                              Cheers PT
                              I have one of those torches ,,, so off into the shop i pops ,,, grabs the bottle with one hand , the touch with tother ,, a slight tweak and it split at the weld ,,, i have seen thicker coke cans ,,, always thought there was something dodge about those bottles .

                              took no effort to tare the hole top off the bottle


                              Yes the bottle was empty,or with any pressure you shouldn't be able to do this

                              His modified torch
                              Glen
                              Been there, probably broke it, doing that!
                              I am not a lawyer, and never played one on TV!
                              All the usual and standard disclaimers apply. Do not try this at home, use only as directed, No warranties express or implied, for the intended use or the suggested uses, Wear safety glasses, closed course, professionals only

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