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Anyone have any links for air tank failures, or catastrophic air tank failures. I ran across someone who insists that welding a patch over hole in an air tank is perfectly safe. believe me they are no pressure vessel welders eitherVantage 500's LN-25's, VI-400's, cobramatics, Miller migs, synch 350 LX, Powcon inverters, XMT's, 250 Ton Acurrpress 12' brake, 1/4" 10' Atlantic shear,Koikie plasma table W/ esab plasmas. marvel & hyd-mech saws, pirrana & metal muncher punches.
Reply:There are plenty of horror stories on exploding air tanks, even on this forum. Personally, I have welded on compressor tanks before with no issues. After all, they were welded at the factory. I think most of the stories of tanks that have exploded are true.... but I believe that the tanks were pressurized WAY higher than the 90 -125 psi that most tanks are certified for. It only takes a little dirt or rust in a regulator to prevent the compressor from shutting off when it reaches its set pressure. Virtually every compressor tank will eventually spring a leak near the bottom where the rusty water has accumulated. That should always be the weakest spot in the tank. When they catastrophically fail, I suspect over-pressurization (and possibly human tampering with the blow-off safety valve.)Miller Syncrowave 350Millermatic 252/ 30A spoolgunMiller Bobcat 225g w/ 3545 spoolgunLincoln PowerArc4000Lincoln 175 Mig Lincoln 135 Mig Everlast 250EX TigCentury ac/dc 230 amp stickVictor O/AHypertherm 1000 plasma
Reply:Originally Posted by DualieAnyone have any links for air tank failures, or catastrophic air tank failures. I ran across someone who insists that welding a patch over hole in an air tank is perfectly safe. believe me they are no pressure vessel welders either
Reply:You cant fix stupid. but im trying to steer it around the major potholesVantage 500's LN-25's, VI-400's, cobramatics, Miller migs, synch 350 LX, Powcon inverters, XMT's, 250 Ton Acurrpress 12' brake, 1/4" 10' Atlantic shear,Koikie plasma table W/ esab plasmas. marvel & hyd-mech saws, pirrana & metal muncher punches.
Reply:Here's one from Garage Journal site. http://www.garagejournal.com/forum/s...d.php?t=227709http://weldingweb.com/vbb/showthread.php...air+compressorhttp://weldingweb.com/vbb/showthread.php...old-compressor Nice pics on this one.http://weldingweb.com/vbb/showthread.php...air+compressorhttp://weldingweb.com/vbb/showthread.php...air+compressor
Reply:I'm a former boiler inspector. My past duties was to inspect all classes of pressure vessels, and to investigate their failures.Yes, it is a fact of Life that air compressor tanks explode unexpectedly, and yes, anyone close by is usually killed or badly injured.Same for domestic water heaters both gas and electric. The failures usually occur due to fatigue and/or corrosion, not over pressure or improper repairs. These failures are rather common, but for some reason they hardly ever make the news unless it is a large vessel with lots of deaths and damage associated with it.The problem with welded repairs to any pressure vessel that leads to failure is improper welding procedure, design of repair, materials used, poor weld quality, and/or stress failure from stresses generated while welding. An experienced pressure vessel welder with proper facilities can successfully weld repair most any common air tank and not kill anyone, but it's still risky business.If you attempt it, have as reference a copy of the ASME code of construction that is dated the same as when the vessel was built....There should be a metal plate attached to the vessel that verifies the tank was constructed to ASME specs and contain the date of manufacture, it's MAWP, and the appropriate stamp for fired or unfired vessels and other helpful info including it's unique NB registration number.There are many other reasons pressure vessels fail, but you can believe it is highly illegal to perform unqualified weld repairs to any pressure vessel. Few vessels in this country fail due to improper repairs because most folks know better than to attempt them without proper qualifications.
Reply:Why do so many pressue tanks on air compressers now no longer have the asme tag? Isn't it law that they do? or it it CCC (cheep chinese crap) that is slipping in? I looked at a compressor (Champian I think) at costco that I might have been inbterested in buying and dumping the direct drive aluminum compressor and putting mine on ( mine is getting on to 25 years old).Miller thunderbolt 250Decastar 135ERecovering tool-o-holic ESAB OAI have been interested or involved in Electrical, Fire Alarm, Auto, Marine, Welding, Electronics ETC to name a just a few. So YES you can own too many tools.
Reply:Air compressors labeled as having more than three horsepower and manufactured after August 30, 1991, must use an air tank certified by the American Society of Mechanical Engineers. I think there is more to the law than that, but i don't have my code books handy. I think it varies by state to some extent as well.Last edited by wade23454; 12-26-2013 at 08:36 AM.
Reply:Who cares let them fix it how ever they want as long as they take it to get hydrostatic tested.Can be done for less than $20.old Miller spectrum 625 Lincoln SP-135 T, CO2+0.025 wireMiller model 250 and WP-18V torchCraftsman 100amp AC/DC and WP-17V torchCentury 115-004 HF arc stabilizerHome made 4 transformer spot welderHome made alternator welder
Reply:Originally Posted by mad welder 4Who cares let them fix it how ever they want as long as they take it to get hydrostatic tested.Can be done for less than $20.
Reply:Originally Posted by DualieAnyone have any links for air tank failures, or catastrophic air tank failures. I ran across someone who insists that welding a patch over hole in an air tank is perfectly safe. believe me they are no pressure vessel welders either
Reply:If the tank is already leaking, that means that rust has already made its way to the surface. Even assuming an experienced welder with a perfect weld, the result will be compromised. If I had a leaking compressor tank I would scrap it and get another one. If I welded one for someone else, I would consider that I own the results and that would make me worried.Miller Millermatic 252Miller Syncrowave 200Liincoln AC-DC 225Victor O-A Set
Reply:Where can you buy replacement certified tanks? Every source I have ever found is way more expensive than buying a new compressor.
Reply:Originally Posted by blackbartWhere can you buy replacement certified tanks? Every source I have ever found is way more expensive than buying a new compressor.
Reply:Originally Posted by gnm109If the tank is already leaking, that means that rust has already made its way to the surface. Even assuming an experienced welder with a perfect weld, the result will be compromised. If I had a leaking compressor tank I would scrap it and get another one. If I welded one for someone else, I would consider that I own the results and that would make me worried.
Reply:It's one of those questions where the person is technically correct but is way more involved than just fixing a hole in a tank.I've been lucky enough to have never seen a compressed tank explode- I think most of who actually been around air compressor tanks don't fully understand the energy that is contained in the tank.What real reference do we have of what 60, 80 ,125 psi is ?We can see MPH- 5 mph compared to 55mph or 100mph is easy to grasp.PSI, not so much.Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:Originally Posted by Broccoli1It's one of those questions where the person is technically correct but is way more involved than just fixing a hole in a tank.I've been lucky enough to have never seen a compressed tank explode- I think most of who actually been around air compressor tanks don't fully understand the energy that is contained in the tank.What real reference do we have of what 60, 80 ,125 psi is ?We can see MPH- 5 mph compared to 55mph or 100mph is easy to grasp.PSI, not so much.
Reply:Guy at work asked me to weld handles and legs on a air tank for the job. He wanted a portable one. I asked him what this valve was and he said it was a dual chamber tank but don't worry it's empty. I flipped the valve and it was FULL!!!! Not Fn cool!!! Always listen to yourself when it comes to safety and your abilities. Your usually right!I hate being bi-polar it's awsomeMy Heroes Have Always Been Cowboys
Reply:Any of you old enough to remember split rim truck tires? Remember how many people got killed airing them up?Dont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Originally Posted by CEPAny of you old enough to remember split rim truck tires? Remember how many people got killed airing them up?
Reply:Originally Posted by CEPAny of you old enough to remember split rim truck tires? Remember how many people got killed airing them up?
Reply:Oh yeah, air pressure is very powerful!Dont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Grainger use to sell 2 types of tanks.1 was certified for 2X dollars1 was "non-certified" for 1X dollarsDon't know if the are still in the catalog?
Reply:Originally Posted by MinnesotaDaveYep - and saw the safety cages that the rims mangled when they blew. Yikes!And saw guys stand there, tapping the ring with a hammer, airing them up after repair with no cage....
Reply:Originally Posted by CEPAny of you old enough to remember split rim truck tires? Remember how many people got killed airing them up?This was on a DOT air tank on a freightliner. had a rub through from "something". it was Christmas eve and the dude just wanted to get home but the mechanic that welded it had no qualifications to do so what so ever. I figure the amount of stored energy in that tank is the equivalent to about 3 sticks of dynamite should it catastrophically fail I still have trucks and equipment with split rings and NO dintnt mess with them unless i have to.Vantage 500's LN-25's, VI-400's, cobramatics, Miller migs, synch 350 LX, Powcon inverters, XMT's, 250 Ton Acurrpress 12' brake, 1/4" 10' Atlantic shear,Koikie plasma table W/ esab plasmas. marvel & hyd-mech saws, pirrana & metal muncher punches.
Reply:A weldor I know worked at a shop in Taylor, Texas. It was a huge shop with lots of employees. They built a container for liquid that would fit on a tractor trailer. The foreman had the employees hook up a large air compressor to it and told them to take it up to 10#'s of pressure. Only ten pounds. At 7 pounds it ruptures. It blew the entire shop down, killing one man and injuring every one in or around the shop.
Reply:In the 1970s I built tanks for a living, 8-feet in dia. 8-feet tall, we never took them over 4-PSI.Dont pay any attention to meIm just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:I have welded on compressor tanks before with no issues.
Reply:I cut compressor tanks apart before and didn't have a problem.I do worry every single time I fill my portable tank though. I always stand to the side of the end caps a bit when it is filling.
Reply:Doing things like welding on pressure vessels and cutting and welding on fuel tanks is like driving drunk or on drugs. Sure plenty of people do so and get away with it, it still doesn't make it safe or "right". It only takes one time for things to go really bad. It's too late when some one is killed or seriously injured.How many people would literally give their right arm to save a few bucks? How about your eye sight, hearing or someones life? Ask Mike here how much he'd give now to have bought a new compressor rather than having the "pleasure" of standing at ground zero when that old compressor he picked up let go on him. I'm betting knowing what he does now, a $1000 for a new compressor seems pretty cheap compared to the injuries he suffered. He was lucky it didn't cost him more than it did, like his life. Unfortunately we can't go back and make changes like that. It's too late once it's happened..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:Originally Posted by DSWDoing things like welding on pressure vessels and cutting and welding on fuel tanks is like driving drunk or on drugs. Sure plenty of people do so and get away with it, it still doesn't make it safe or "right". It only takes one time for things to go really bad. It's too late when some one is killed or seriously injured.How many people would literally give their right arm to save a few bucks? How about your eye sight, hearing or someones life? Ask Mike here how much he'd give now to have bought a new compressor rather than having the "pleasure" of standing at ground zero when that old compressor he picked up let go on him. I'm betting knowing what he does now, a $1000 for a new compressor seems pretty cheap compared to the injuries he suffered. He was lucky it didn't cost him more than it did, like his life. Unfortunately we can't go back and make changes like that. It's too late once it's happened.
Reply:Rereading my post, I may have made it seem like Mike tried to cut corners or be "cheap". That's wasn't the case or my intention. In his case it really was an accident and he didn't really do anything "stupid". That same thing could have happened to anyone. However the results could have easily been the same if someone had done a poor repair on a tank. It's a bit amazing he wasn't more seriously hurt when that tank let go on him..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:A little "compressed air" never hurt a thing.Bubble gumTooth pixDuct tapeBlack glueGBMF hammerScrew gun --bad battery (see above)
Reply:Originally Posted by BurpeeA little "compressed air" never hurt a thing.
Reply:So how are all these tanks that are made in China getting inspected? Cheng Wong Foo must be a busy little fu#ker..tackleexperts.comwww.necessityjigs.comhttps://www.facebook.com/groups/mach...dingequipment/
Reply:Originally Posted by VPTWhen applied right.
Reply:Originally Posted by brucerThats a waste of good oxygen..
Reply:In the late '70s me and the wifey were doing our normal commute together one morning on or way to work.....It was stop n go traffic-creeping along side by side where first we were ahead of the person in the lane next to us, then they were ahead of us...you know the drill.Next thing we know we here what sounded like a shot blast next to us and see people running in every direction!......What happened was a city bus that was in traffic with us experienced a split ring tire failure where the ring flew off and killed a woman passenger in the car next to the bus....The VERY SAME bus that we had been alongside just seconds before!...It could have been MY lovely young wife!
Reply:I don't know whether split ring wheels have been outlawed or not. If not. they should be outlawed. In any case they became obsolete when radial tires came on the market. When I was at the workers compensation company, there were lots of accidents with the split rings. There were lost eyes, amputations and deaths reported. I often inspected auto shops that repaired and mounted tires with split ring wheels and the cages they used were always dinged and dented from popped rings. I'm glad that they aren't being used anymore.Miller Millermatic 252Miller Syncrowave 200Liincoln AC-DC 225Victor O-A Set
Reply:Originally Posted by gnm109I don't know whether split ring wheels have been outlawed or not. If not. they should be outlawed. In any case they became obsolete when radial tires came on the market. When I was at the workers compensation company, there were lots of accidents with the split rings. There were lost eyes, amputations and deaths reported. I often inspected auto shops that repaired and mounted tires with split ring wheels and the cages they used were always dinged and dented from popped rings. I'm glad that they aren't being used anymore.
Reply:I was going to say.That uppercut gust blew right up her WooHoo and inflated her lipzzz Bubble gumTooth pixDuct tapeBlack glueGBMF hammerScrew gun --bad battery (see above)
Reply:Originally Posted by steven325They are not outlawed. They are still trucks, trailers, and equipment with split rings still in use. The military still has many on there vehicles. I changed many of them as a civilan contractor until obama got into office and I got laid off.
Reply:Originally Posted by gnm109I don't know whether split ring wheels have been outlawed or not. If not. they should be outlawed. In any case they became obsolete when radial tires came on the market. When I was at the workers compensation company, there were lots of accidents with the split rings. There were lost eyes, amputations and deaths reported. I often inspected auto shops that repaired and mounted tires with split ring wheels and the cages they used were always dinged and dented from popped rings. I'm glad that they aren't being used anymore.
Reply:Originally Posted by CEPAny of you old enough to remember split rim truck tires? Remember how many people got killed airing them up?
Reply:Originally Posted by steven325They are not outlawed. They are still trucks, trailers, and equipment with split rings still in use. The military still has many on there vehicles. I changed many of them as a civilan contractor until obama got into office and I got laid off.
Reply:Still many split rims on road today in colorado, kansas, nebraska. Many shops will not repair them because of not having training. They are still usable with proper training and safety equipment. Are they the best choice? No they are not. However I still have a 67 ford 3/4 that still has 16" split rims.
Reply:all this talk makes me real nervous about the rusted-out hx I repaired a couple months ago.funny, when I looked at it, I thought, "cool, its stainless, wonder why it leaks?" (in food-plant so I don't feel completely dumb for assuming)no, it was steel. i made a huge Band-Aid and ran pass after pass after pass to get out to decent material. i made sure to let them know that this is complete bs and the hx needs to be replaced asap. they didn't want me to leave till it held so. . . . all this talk makes me think about dangers of pressure-testing pipe too. a previous employee goes to take a Victaulic cap off of piping under air-test. he got scalped and then some. only reason he still lives is that this was work at an exhisting and operating hospital.memo i got in regards to testing. 24" hydro. some ridiculous pressure 1000+ and one of the seams gives on a 90. blows a few guys under a nearby truck with head trauma to a couple of them. ntm they all got really wet too. . . . .scary stuffLast edited by 92dlxman; 01-01-2014 at 02:18 AM.bosses stuff:trailblazer 325maxstar 200my stuff:sa 200fronius transpocket 180100 amp Lincoln w/f97 f350 DITKevin
Reply:Originally Posted by brucerSo how are all these tanks that are made in China getting inspected? Cheng Wong Foo must be a busy little fu#ker..
Reply:DSW, regarding post #31. The compressor was given to my son. The only advice I have is if you buy or are given a used compressor, fill the tank almost full of water, power it up outside and just stand back to see what happens. It was one of life's lessons me and my son won't forget. The way my left hand was broken up I'm happy to still have it whole. It's not 100% but I can still use it good enough to do what I need w/ it. MikeOl' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw |
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发表于 2021-8-31 23:23:45