The Full Guide to Oxy Fuel Cutting

hey guys welcome back to the shop today we're going to do a full tutorial on oxy acetylene cutting we're going to show you some cool hacks along the way to improve your cutting get your skills up we're going to cover some safety features so you don't blow yourself up or death yourself or your coworkers I mean that's the last thing you want to do is death a co-worker so we're gonna go ahead and start off with hooking the bottles up and selecting the appropriate tip for the different materials were gonna cut we've got some rose buds here I have some flush cuts and then different tip sizes for various thicknesses and material so we're gonna show you all the stuff you need to know to make your cutting improve so the first thing we're gonna do is we're gonna we're gonna take these caps off the easiest way to do that is not to stick anything inside the cap and rotate it okay we talked about this in a previous video but if you didn't see that go check it out what we're gonna do is this one's actually making a jackass atomies gonna come off pretty easier we're gonna take the caps off okay if the caps are stuck like this guy here take a little hammer and just tap it right here along hawler of that that cap and it should loosen it up don't place oils lubricants petroleum anything around these edges in here okay you need three things to start a fire heat friction and a fuel source right so if I cover this oxygen if I cover that up with some petroleum now I have a fuel source and now all I need is some heat and then boom I got a fire right so don't put any petroleum products around there we're gonna open both of these up now when I get my oxygen open up I want to stand off to the side make sure nobody's over in this area and I'm just gonna give this a quick burst okay you don't want to do that with a flammable or with the acetylene propane map gas magnet gas none of that stuff you don't want to release any fuel gas into the air just do it do a quick burst to make sure I don't have any dirt contaminant debris or anything like that inside the nozzle here get some safety glasses first so just quick open close that's it nothing nothing too extravagant next thing I'm gonna do and select the appropriate regulator okay now this regulator is meant for oxygen how do I know that because it is color coded it is it has a green nozzle on here I've got green on the inside of my my low-pressure side the hose is green everything on this system that relates to the oxygen is going to be green or specifically labeled I also know that because I have female nut here that I'm gonna place on the male threads and they're also right-handed threads okay so I I can't even accidentally hook this up backwards because it's designed it's welder proof it's not gonna let me do that so I want to back off the pressure adjustment knob I don't want to take it completely off but it should be relatively loose okay when I hook this up I want this to be loose because I don't want to spike the pressure in here because if once as soon as I open this tank up if this thing's under a lot of pressure I could rupture the diaphragm okay now you know anything about rupturing a diaphragm it's something you do not want to do okay you rupture the diaphragm in here next thing you know your regulator gets pregnant you got a little regulator's running all over the place you know you're paying child support alimony it's just a bad situation don't rupture your diaphragm just back that off a little bit now if you have a t-handle what they recommend is to point that t-handle and the direction facing up I've never had this happen to me but I've heard tale that if you back that screw out if the the regulator is broken on the inside you can't visibly see that that it can bypass when you turn that pressure adjusting screw out that t-handle can shoot out so you want to point that away from your face your body okay so we're gonna go ahead and hook this up put that on hand tight now you can take this wrench right here and you can throw it in the trash because it's relatively useless they just don't line up with all the right sizes and stuff and then you end up rounding off all your brass fittings and tearing things up stripping things you know just you can use a crescent wrench or you can use the appropriate size wrench this one happens to be an inch and an eighth so that's what I'm gonna use I'm gonna hold the regulator in place and just a little bit of pressure I don't want to crank down on this right you don't need a cheater pipe I mean you know you know if the strongman this thing it's brass fittings so you just to seat properly you don't want to tear the threads up okay if you pull down too far you can strip this off you could start breaking things just a bad situation can we get over here to the acetylene we're gonna do the same thing we're gonna we're gonna rotate this pressure adjusting screw we're gonna back it out just a little bit okay now it's nice and loose I don't have pressure built up in here I'm gonna fix this in and these are left-handed threads now you'll notice it is a male thread pattern on here female on the tank that's so I these are not interchangeable I can't hook them up unless I got a machinist buddy and he can make me an adapter which I don't want to do that hmm but the next thing you'll notice is there's little V notches inside this nut that tells me that it's a left-handed thread so when I put this in I'm going to turn this to the left counterclockwise okay again you can face this up if you have a t-handle select the appropriate wrench or get a good adjustment on your Crescent just snug it up okay again you don't need to heman it next thing we're gonna do is we're gonna grab this duplex hose okay we're torch hose depending on where you're at different names we're just gonna grab one end of it you want to make sure this stuff's not dry rodded you want to go through and do a visual inspection make sure there's no cuts nicks breaks anything like that along the line it doesn't matter which one you hook up first because neither one of the lines are are active I'll go ahead Huck up the acetylene notice red line red for fuel and I have V notches in here also so this is also left-handed thread okay I can't hook these up backwards it's not gonna let me this is one less thing I got to think about keeps the stress out of my life thanks Victor green no V notches right-handed thread again I can go through and I can use an apparatus wrench I prefer not to its regular eleven sixteenths wrench should do it put that on there and just snug it up don't crank down on it you'll strip these things off quick another thing note is if these threads aren't sealing correctly which we're going to do a pressure test here in a second but if these threads aren't seating correctly you have a leak around here go through make sure there's any debris in there you want to clean that out you can hit this up with a wire brush do not use teflon tape to wrap around there why because teflon tape is a petroleum by-product okay so I don't want to go wrapping fuel around an oxygen source they do make a specific tape it's it's yellow very similar to a teflon tape but it's not made out of petroleum so you can do thread seal tape that way all right so the next thing I want to do is I'm gonna hook up my torch and I'm just going to use a regular cutting torch for this application however if you have a combination torch feel free to use that whatever you have at your disposal for longer cuts I prefer to use these that's just my personal preference but this guy right here will do the job just as good I'll show you why I like this here shortly okay now same thing fuel line I have my acetylene with the v-notch in there I'm gonna hook it up to here I'm gonna twist this left okay because it's left-handed threads hold acetylene setup or a fuel I keep saying acetylene but if you're using propane map gas man gas any of those it's gonna be the same thing all of your fuel fuel lines are gonna be left-handed threads they'll have a v-notch in there snug these up go ahead and snug them up with a wrench again we're not cranking down on this stuff it's just brass fittings very soft metal and it provides a really good seal I have this hooked up so what I want to do now is I want to I want to select the appropriate tip okay so the appropriate tip is going to be based off the thickness of the material that I plan to cut so we'll start off with I don't know we'll just do some eighth inch material just for starters so I'll check my reference chart we'll get into this here and a little bit more in depth eighth inch material I need a trip a lot tip so I'll go ahead and put a trip a lot tip in here this area right here I can hand crank that okay doesn't doesn't need to be extremely tight okay don't put these on too tight you start putting them in too tight you're gonna damage the seat that's in that on the backside of that tip and you could cause issues the leak you could end up sucking oxygen in here which you don't want to do from the surrounding area now the reason I put a tip in here first before I set my gauges is because each tip is going to operate with a different amount of psi for oxygen as well as the acetylene so now that I have the tip selected I'm gonna look at the chart and say and the tip remember is based off the thickness of the material going to cut I'm gonna say I'm cutting eighth inch thick material I have a triple tip it recommends 20 psi for oxygen and three to five for a settling okay so we'll go ahead and we'll set that up now so I'm gonna pressurize the system the first one I'm going to turn off oxygen and I'm gonna turn that on slowly nice little crack give it a second and then I'm gonna open this up all the way now you'll notice that on this regulator I have two different gauges one is for the pressure that's inside the cylinder and the other is for my working pressure so we're gonna go ahead and adjust our working pressure and like I said we should be at 20 to 25 psi so I'm gonna go ahead and crank this up to 25 psi and then I'm going to open up the oxygen valve and verify that I'm still at 25 so what's gonna happen is you'll notice when I close it it jumps up a little bit and when I hit the lever it drops back down so I want to make sure I'm adjusting my working pressure so I need to have the valve open in order for it to work so I want to do this relatively quick so I can open this up verify that I'm at 25 psi and then close it same thing over here we're gonna open this up now when we open a settling we only want to open this up one to one and a half turns okay depending on which book you're reading which manufacturers putting out the information it's roughly one to one and a half turns and that's simply because if anything if I have fires surrounding here the first thing I want to do is I want to shut off my my fuel source I can easily run over here and give this one to one and a half turns with a with a glove on of course and shut the fuel system down and then that will starve the the fire triangle of one key element which is the fuel source get rid of the fuel source put out the fire that's F your systems on fire not the job site job sites on fire get a fire extinguisher one thing to note is if you look at these apparatus wrenches they have these little nut drivers on them okay and that's for like old-school acetylene tanks that don't have the hand valve on them you drop that in there and you can open it up and close it if for some reason you're working with a bottle like that do yourself a favor leave that wrench on the bottle right because if something happens somebody has to shut this tank off you drop this in your pocket and you head off to the crapper now they can't shut this system down okay so leave the wrench with the system if that's the case so suddenly we're going to go ahead open this one to one and a half turns that's about one complete turn that's all I need okay again I'm going to open up the acetylene side and I'm going to adjust this to three to five pounds so I'm gonna go up to five pounds so I'm gonna rotate here a little bit first just to get that needle moving and then I'll open the valve here okay so now we're at five psi go ahead and shut that off that's pretty much everything you need to know up here I have a full tank there it tells me there's the the psi that's in the tank now all your fuel gases they're gonna be done by weight they don't fill these up by psi so if you've ever got a propane tank filled you'll notice that they put it on a scale they do the same thing with acetylene they put it up on the scale and they fill it up to what is recommended per weight inside the acetylene is calcium carbide dissolved in water that's what creates acetylene so in here there is a porous membrane or like a sponge and then they fill it with liquid acetone as well as the acetylene the acetone helps to stabilize the acetylene acetylene is very stable and should never be ran pressures higher than 15 psi regardless of what size tip you're using rosebuds don't ever run it higher than 15 psi okay if you do that you could start withdrawing some of that liquid acetone it's gonna get up in your regulators mix all up in your diaphragm and your hoses that acetone is gonna start eating away at any seals or rubber coatings anything like that that you have in your system it's gonna gum everything up it's not gonna work effectively you'll know because you'll have a purple flame coming out of here if you're withdrawing liquid acetone same another thing to note acetylene should always be ran in the upright position okay this is different than propane all the other stuff acetylene should always be ran in the upright position if you have to lay it down for transport reasons or whatever make sure to stay in the bottle up let it stand for about an hour because all that liquid acetone needs to settle back down and go through that porous membrane in there and settle back at the bottom so you don't risk pulling that the contents the liquid contents out through your regulator so stand it up for about an hour if it's been on its side for a longer period stand it up for roughly two hours what's recommended okay okay now the system is pressurized we're gonna go ahead and check for leaks the easiest way to do this the most common method because a lot of people don't carry soap and water bottles on them you should should be on the torch cart you can a little bit of soapy water spray all your connections and if you have any leaks it'll bubble up but one thing we can do is now that our system is pressurized I can go ahead and shut both of these off now if any of these needles move that's gonna tell me it's gonna signify that I have a leak somewhere in my system and I need to go back through and check all my connections none of these needles have moved so I'm good to go same thing with my oxygen I'm gonna go ahead and shut this all the way off yeah it's pain in the butt but better to be safe than sorry give it a couple and give it about a minute or so if nothing's moving you're good to go the soapy water does great because you can actually trace exactly where the leak is this method right here I can't go through and determine where the leak is I'd have to go through and check every single connection luckily everything is in good working order not to worry about any leaks one thing and another thing I want to point out with acetylene is on top of there there's two of these little fuse plugs if there's ever a fire or this bottle catches on fire anything these fuse plugs are designed to melt at about 220 degrees which will allow that this cylinder to off gas and essentially burn up so it does not explode okay because it's no longer contained it's off gassing everything it's trying to get rid of its contents it's not going to explode a funny story I was on a job site young apprentice there was a guy up above he was cutting some stuff didn't check for leaks on the acetylene I was down on the the second floor I'm sorry I was down on the first floor where the oxygen acetylene was I was doing some welding his sparks were falling right on top of the acetylene so I turn around soon as I seen it the flames started shooting up about three to four feet and a bunch of us just ran straight out the building scared right because we were all under the myth that these things would blow up I didn't know any better apparently neither of the day so the bossman rolled back up and why is everybody standing outside we're like you know we're standing out there you know fingers are over our ears is waiting for this thing to pop off he walks in with a welding glove puts it on gives it that one to one and a half turns shuts it back off told us to get back to work I mean uh I feel about that big but now you know I know better so and now you guys know better so that's what those were there for and that's why we only open this one to one and a half turns alright next thing we're gonna go through I want to talk about these before we light this thing up we have fuel flashback arrests arrest errs and oxygen flashback arrestors now a lot of these are built into the torch if they're not you can get external ones that'll just they bolt right up here and then typically what's attached to the regulators are check valves so flashback arrestor essentially isn't going to let any flame inside so none of the flame can't go back inside the lines here and a check valve is only going to allow the gas to flow one way so this way I can't get because oxygen is at a much higher pressure than the Isetta through this system the gas is only be able to flow one way so my gas can't flow back in to the acetylene line and likewise the acetylene can't flow into my oxygen line because of that check valve check valves only going to allow that gas to flow one way and the the flashback arrestor is going to prevent any sparks or flames from going back up into the torch okay so these are typically mounted you can mount these right at the regulator but this one already has them built into the line okay and a lot of torches do same thing with this combination torch here this combination torch they're built right back into the handle some of the old-school ones they don't have that therefore you have to put external ones in there it's very simple setup there they're threaded on both ends so it'll thread on to this and then you be able to thread your hoses right up onto it shouldn't have any issues with that all right before we get to cutting and setting our flame let's talk safety for a minute so we want to treat oxy-fuel cutting just like we do any other aspect of welding so you want to make sure you have a decent jacket on you want to cover up any exposed skin Welding cap is always a good idea because we're gonna produce some sparks here and we're gonna produce it with you know quite a bit of pressure for my oxygen those Sparks should go all replace in your hair you don't want to get burnt in there ear plugs or something to cover your ear openings are a good idea not that it's loud but if you get a spark in your ear that's a new kind of hurt denim jeans are good to have as well as regular work boots okay you don't want to be doing this in tennis shoes or flip-flops or anything like that a good pair of gloves good pair of dry gloves are a good thing to have you don't want to use like mechanics gloves or nylon gloves anything like that because synthetic fibers will just melt to your skin okay so if you have a safety vest or anything like that that's made out of polypropylene polyester or any synthetic fibers go ahead and get rid of that make sure you have cotton denim wool any natural fiber is gonna do another thing we want to make sure that we have the appropriate eye protection safety glasses aren't aren't going to cut it okay you can actually get from cutting this the the flame produced is actually bright enough to cause keratitis also known as arc flash welders I hundred different names right so you can actually get arc flash from looking at the flame too long you don't even know you're getting it because it's not that bright enough to where you know it's it's shocking so you know you kind of you take that risk so don't do that I recommend shade five to six for most cutting applications you can use the goggles they're very very stylish I don't like them they're great for oxy-fuel brazing and soldering stuff like that but because the high amount of sparks I just use a pair of regular tinted ir5 safety glasses and then I'm gonna wear a face shield right don't wanna don't want to get the main melted so I'm just gonna use safety glasses and a face shield so you can also use clear safety glasses and a tinted face shield or vice versa so I'm going to use the tenon safety glasses with a clear face shield either way protect your face I've got a guard the grill alright now that we're all safety it up we're gonna go ahead and ignite the torch the first thing we're going to do is we're going to turn on the acetylene for the fuel source and then we're going to use an approved striker so whether it's one of these the little clicker guns whatever the case may be I did not say a Zippo or a Bic lighter or matches or anything like that use the approved apparatus to start this thing off okay we're gonna point this in a safe direction away from myself the beard the cameraman all that good stuff so we're gonna fire it up crank the just crack the acetylene okay notice we've got all this black soot coming off we want to rotate and adjust this flame until all that black soot is pretty much gone but we want to ensure that the flame is still touching the tip okay if that flame jumps off the tip like that it's way too high okay we're not launching a rocket ship here so the suit should be primarily gone flames still touching the torch now I'm gonna slowly introduce the oxygen I want all these cones right here to be equal okay so I adjust them to where they're equal and then I'm gonna test it by hitting the oxygen lever the cone should remain equal if they don't I need to read read readjust some things now there's three different types of flames so right here I have what's called a neutral flame okay now if I have too much fuel in this flame this is what it's going to look like okay that is known as a carburizing flame the way I remember that carburetor carburizing fuel I have too much fuel go back to a neutral flame if I use a carburizing flame and I cut with a carburizing flame I'm going to end up with carbon deposits along my cutting area that's going to create hard brittle zones inside that welding area which I don't want next thing is an oxidizing flame if I have too much oxygen in there that's relatively what it's going to look like too much oxygen is when I cut is going to leave little poorest areas inside the welding area I don't want that either I want a nice neutral flame and that's that's what we have here so you'll notice you keep hearing a little pop okay we're gonna go ahead and shut the system down so I'll turn the oxygen off then the acetylene we're getting a popping noise probably because I have a dirty tip in here you don't you don't wanna go through life with a dirty tip so we're gonna go ahead and when I clean a tip I like to take the tip out of the torch and I'll show you why okay so first thing I'm gonna do is just take the little file that comes in here and just clean any debris that's on that tip next thing I'm going to go through and I'm going to clean out each orifice I'll find the right appropriate sized tip and I clean out all the preheat holes as well as the oxygen hole I like to take the tip off the torch to do this because if I have crap or whatever built up inside here and it's on the torch and I you know drive all that stuff back in there well as soon as I fire back up the pressure is going to blow that debris back up in the tip and now it's stuck so it's gonna go through and clean these out once I get the right sized tip there I'm just going to go through and clean out each port just make sure there's no obstructions in there there's six preheat holes and one oxygen all right so now that all these are cleaned out I'm going just blow in the front of this blot any debris out of the back and then we'll get a hook back up to the torch all right so we just clean the tip out showed you guys how to get the the neutral flame we're looking for but how does our tip get dirty well most of the time it's because people get too close to what they're cutting okay so if I were to ask you if this torch is sucking or blowing when I'm using it what would you say so you would think that because I have air pressure coming out of here that is blowing so nothing should get caught up in that tip but that's where you're wrong because of the venturi effect it actually creates a vacuum okay so just to show you there's no camera tricks here it actually creates a vacuum so if I get those cones too close to what I'm cutting and I start cutting down all the impurities the mill scale dross anything anything like that dirty debris you know anything that's on top of the service if I'm too close to it it's gonna get sucked up in the tip and it's gonna clog so you want to keep your coupling distance thanks to man-cub for teaching me that new word and thanks to Bob Moffat for teaching him you want to keep the coupling you want to keep the coupling distance I stay typically about eighth inch to three sixteenths off of there so I'll show you that when we do the cut but just to understand that it does create a vacuum and that's how you're pulling impurities up in your tip that's why your tips getting dirty and nobody likes a dirty tip let's go ahead and do some cutting I got some eighth inch material here we're gonna go ahead I'm gonna put a line on here because it's always good to cut with intention obviously I can cut this we all know that I can cut this piece of material here but how can I cut it where the intended area is that's the that's the big thing so even if you're practicing at the house at school or whatever scribe you out of line and cut with intent right don't cut willy nilly right the torch it's cut that's what it's designed to do improving accuracy is what you have to work on and to do that draw your line cut with intent I told you earlier I was gonna let you guys know why I like to use this torch I like to use this torch because I can cut material and treat this just like a pool cue so when I prop up on the material I hold my hand just like this and I can slide that torch back and forth very nicely little friction you can do it with ease the more stable I am just like welding three points of contact more stable I am the better I'm gonna be able to cut so I can prop up on you know the workstation put my hand up here my hands far enough back from where I'm doing the cutting I don't have to worry about burning the backside of my hand whereas if I was to use a hobby torch and use that same method I'd be getting pretty close to my hand by the time I came to the end of the cut and I'd only be able to cut a short amount of distance with this it's gonna require a lot more movement with this I get nice clean smooth cuts you know almost a foot long even though only gonna cut about two inches right now let's go ahead and fire this thing up and we'll do some cutting okay now with thinner material this is this is eighth inch material with thinner material I've got a different technique I'm going to use because I want to put a slight bit of travel angle on there like a little bit of a push angle and go across that way if I go straight up and down it's liable to weld itself back together okay it's this way below that material across I'm gonna go ahead and just get in a position get comfortable I'm gonna get the piece up to the kindling temperature okay this right here is like a kindling temperature once it gets that glowing red okay that's what I'm looking for I'm gonna do that right there on this side of the line and then I'll hit that oxygen lever all the way when I do that you don't want to just ease into it with this thing with the oxygen it's all or nothing so push that handle all the way down okay right where I need to be hit the leverage cut right across alright so now we're just gonna shut it down and I'm gonna shut it down in reverse order of how I started it so oxygen first settling in second done alright so now what we're going to do is we're going to go ahead and I'm going to swap out the tip because I'm going to increase the the tip size because I'm going to cut some quarter-inch material I'm going to show you guys a cool little trick you can do on the jobsite to help with your cutting so because this is hot I'm gonna make sure I handle it with a glove it's gonna retain heat for a little bit so according to the chart quarter-inch material I need a double lot tip now if I change out the tip size what else should I check that's right yeah the working pressures but according to the chart here working pressures for a triple ah and a double aught tip are the exact same so we don't have to make any adjustments all right so we're just gonna put a little line here soapstone using the square now one thing I like to do here's a pro tip for you my soapstone I only sharpen one side of it and I just put that at a slight little slant and that's because I can put it up against my workpiece and draw that line and it's right there now if I used a thick piece of soapstone the lines gonna be off it's just not going to be good so now I've got a nice straight clean line to follow I've got my line scribed here I have a small piece of angle iron now I could theoretically hold up against here and use that as a straight edge or bob made a couple burn bars for the shop but if you don't have these you don't have the material to make one on it's not not handy everybody's got a hose clamp right take a hose clamp I'm gonna match it up against this angle and I'm just gonna set it at a distance where I can maintain that that correct Heights from the material that's about where I want it just snug this hose clamp down and I'll be able to rest it against that piece of angle iron okay and that's gonna keep me at a nice straight distance and produce a nice clean cut [Music] alright so there's that that helps to put that in your little tool box and tote that around with you the next thing we're going to do is I'm going to show you guys a scarfing tip okay so this is a scarfing tip or a flush cut tip or a rivet cutter goes by many names these things are pretty cool what are just going to allow me to do is lay flat on a piece of material and cut flush with the top of that material so I use these a lot for when we do weld qualifications we had to cut a backing strip off when we had to do demo we would use these to cut the bolts off and save some of the beams I guess that's kind of where it gets his name is you know back in the day they would cut rivets off with it so I'm just going to show you guys how to cut off a backing strip with it and kind of show you the capabilities of this thing it's pretty cool okay so what I like to do is kind of start up stop get everything read and then I'll rotate down I can judge exactly where I need to go with it [Music] [Music] I like to take all this stuff off in layers this way I don't doubt it that side of that plate too much if it can happen pretty quick like I said I like to cut off just a little bit of layers you can end up dowsing the backside of the plate if that oxygen stream gets deflected you can cut in there too deep you don't want to do that you want to try to avoid that but essentially I would just remove the rest the backing strip take it down and then I'd have very little grinding work to do I always leave about an eighth of an inch on there that way I'm sure that you know I don't gouge into somebody's test plate and then clean it up that way so now last but not least we're going to talk about the rosebud so rosebud is used for preheat post heat applications you can use it for heating up material so you can bend it to your will whatever the case may be but we're gonna go ahead and show you how to set that up and then some additional safety precautions you want to keep in mind when you're dealing with a rosebud so these are rose buds now they do make rosebud tips I don't I do not have one that would mount in here just like the scarfing tip or any of the cutting tips I do not have one of those however it basically just looks like the front end of this one these are for use for the combination tip the strains if you've ever used the rosebud have you ever seen somebody else using a rosebud you've probably heard these things popping and kicking and blowing black smoke and whistling and getting really hot and people are scratching their heads they're like I don't know is brand-new.i cleaning out again they can't figure out what's going on with it it's because they're using the wrong size acetylene cylinder for the application that you're using for the tip size that they're using so for instance this right here is a number eight okay it's a number eight rosebud now if I look on this chart it tells me for number eight tip size for a rosebud I'm going to be withdrawing thirty cubic feet per hour okay so let's go over the acetylene tank because I want to talk about this for a second all right so this is a three hundred sixty five cubic foot tank of acetylene okay so I plan on using a number eight tip okay so if I use the number eight and I run it it 10 psi on the acetylene 20 psi on the oxygen I will yield roughly thirty cubic feet per hour the basic rule of thumb when dealing with these is it used to be one seventh of the cylinders capacity so I could use one seventh of the cylinders capacity per hour and I'd be safe 2003 OSHA mandated a change and now it's 1/10 so I can use 10% of the tanks capacity so this is a 365 cubic foot tank I can actually burn 36.5 cubic feet per hour and still be within the safe limits so according to this chart if I use those settings I'm only going to burn 30 cubic feet per hour now if I stepped up to a larger torch let's say a number 10 and I ran the minimum settings 12 and 30 and I had that would give me 40 cubic feet per hour I run the risk of that torch trying to burn back the gas is it's basically gonna starve the torch so that torch is going to look for fuel elsewhere and it's gonna start following the fuel down the lines your check valves and your flashback arrestor to help prevent that but that torch is gonna get extremely hot in the meantime we'll go ahead and get this assembled and then I'll show you guys what it can do all right so right here I have a combination torch and this is the rosebud I'm gonna put these two together and I want to put these two together you're gonna notice that there's a rings in here okay I want to check these o-rings and make sure they're not dry rotted snapped burnout or just plain missing okay these look like they're in pretty good condition I'm going to assemble this to the torch and then I'm gonna screw this on hand tight okay you don't don't want to put a wrench here at all okay these o-rings are gonna steal everything together the brass connections will thread in just fine whirring at the tip to where you know you're gonna be using it and then just hand crank that's it okay I'm gonna take off these little protection caps I have to shut both tanks off because I need to disconnect my lines before I can connect them here so we're gonna go ahead and do that right now I'm just going to go ahead and shut these down and bleed the lines back off the adjusting screw same thing with the acetylene close it completely bleed the line and then back off the adjusting screw the reason I want to do that is it's a good practice to get into whenever you're whenever you have to bleed your lines or you know swap out components or shut it down for the end of the shift or swap out bottles you want to you want to bleed the lines because twelve foot of this duplex hose filled with oxygen and acetylene is roughly the equivalent to a quarter stick of dynamite so you need to you know understand that that's what you have laying in that hose so it's always a good good practice whenever it's not in use go ahead and bleed everything out okay we're hooked back up now because I shut the system off and unhooked the lines from the previous torch hooked them back up to this one I'm gonna go ahead recharge the system and I'm gonna check again for leaks because I don't know if this connection is as solid it may have a leak in it I want to check that out just because I put a new attachment on okay settling is good oxygen is good all right so that's all good let's go ahead and set our pressure so I'm going to run ten on the acetylene and twenty on the oxygen again I need the working pressure so I'm gonna open the acetylene and I'm gonna run it to ten and then I will close it open the oxygen run this to twenty and then close it okay both shut off we get safety it up and we'll just we'll go ahead and we'll we'll heat some metal up open up the acetylene much bigger flame still same thing I want the flame to be attached to the tip try and get rid of a little bit of that black smoke and then I'll slowly increase the oxygen okay we have a neutral flame again now we're just going to run across this quarter-inch piece of plate and I'll just show you guys how fast it can actually heat something up like I said you could do this for a preheat pose to keep things up to get them to bend you can start to see it turning red this would be something you know like if I was gonna bend something I'd do this I'd eat it up get it kind of read and then I'd be able to bend it use this a lot for repairs metals deform you got to reshape it make sure you're using the right rosebud with the tank that's gonna be your biggest issue a lot of people use a torch tip that's oversized for the tank that they have and it can cause a lot of problem [Music] but when we shut this down we're gonna do the oxygen first then the acetylene all right thought you were done didn't you yeah well we're not we got to talk about the most important part of oxy-acetylene wrapping this thing back up and shut her down because you don't want to be that guy everybody knows that guy you you're that guy not not you you don't be that guy anymore you can change starting tomorrow be the change you want to see in the world all right let's go over here and we'll get this wrapped up first thing we're gonna do is we're going to shut these tanks down doesn't matter which tank you shut off first there's a big debate about it but I mean you think about it with a common sense approach if I shut these valves off still have the same amount of pressure in the line I got check valves in here so the gas can't go back one way or the other right shut them both down now that everything's off I'm gonna go ahead and bleed the lines out I'm going to bleed the oxygen first open the valve up and then I back off the set screw again or the adjustment screw closed the torch off open up the acetylene drain that till the needles go to zero back off that adjustment screw you don't have to take thing completely off just make sure it's relatively loose and then close this off now I'm gonna detach this torch because I don't know who's using what next time so I'm just gonna leave this there they can hooked up exactly what they need then I have to break my stuff down to today Junior okay so now I'm gonna disconnect the hose the hose can get rolled up and put on the back of the torch cart another you're that guy - you wrap the whole thing around the bottles in the handle don't be that guy either nobody likes that guy cuz nine times out of ten you leave one of the bottles empty and then you wrap the whole thing up now I got to untangle it to get to the empty bottle don't be that guy either nobody likes that guy you know who you are now if you guys are just leaving this for 24 hours you can leave everything hooked up but OSHA says if you're gonna leave this set up for more than 24 hours meaning not coming back the next day you need to not only break the entire system down but you need to separate these two so they don't fight over the weekend when you're not there to supervise always make sure that anytime you're handling these bottles they have a cap on them or is it on a regulator chain to an appropriate cart okay a hand truck is not an appropriate cart you can chain these to a column you can put them in an appropriate cart appropriate cart for lifting put in a bottle rack they just can't be freestanding if you absolutely have to you don't have anything to tie it to no card to put it on I would lean it on the side and then wedge it to where it can't roll off anywhere remember if we lean the acetylene on the side we need to let it set for at least one to two hours prior to use so we don't start sucking up any of that acetone let's get these bad boys off remember left-handed threads so I'm gonna go righty to loosen them counterintuitive I know I don't make this stuff up this one lefty loosey replace the bottle cap regulators come off bottle caps go on caps come off regulators go on it's that simple that's it this is awkward all right guys that's it for this episode appreciate you watching hopefully you learned something till next time make every cut better than your last

Channel: Weld.com

Views: 829,242

Rating: 4.9075274 out of 5

Keywords: welding, weld.com, mig monday, tig time, how to weld, learn how to weld

Id: gXuMDxYeqZ4

Length: 45min 5sec (2705 seconds)

Published: Mon Aug 12 2019