Torch Cutting Basics Everyone Should Know | Oxygen & Acetylene Fuel

what's up my well two family it's your boy matt warrior welding tx back again on the weld tube set at the one and only south coast weather academy in houston texas today we're doing oxy acetylene cutting and safety we're gonna go from torch to bottles walk you through that cutting technique stuff like that so let's get rocking and rolling let's do it [Music] so today guys we're doing oxyacetylene cutting so i can't stress the importance of safety here see it's the most basic form of welding we're going to do in this industry and every welder needs to know it but if there's one thing that can hurt you it is the oxy acetylene process okay i preach out to my students all the time there's one thing in the lab that can bite you it's going to be an oxy acetylene and it's not difficult as long as you think about what you're doing while you're doing it be in the moment okay to get us started here we'll start walk you through from the torch okay so it's a typical victor torch setup this one's a split torch so you can run different accessories on it some are full length just cutting but with a torch like this is what i prefer i'm a fabricator you know we do a lot of different things so with this option being a straight torch barrel with a threaded end we can run you know rosebuds on it you can run a cutting attachment you can run a welding attachment on it so it's the most versatile bang for your buck i enjoy it this i have the same exact torch on my rig walking back to our bottles you know your traditional quarter inch hose we have our low pressure acetylene tank and our high pressure oxygen again very basic i'm sure you've all seen this before but what you do with it and how you do it makes a big difference so just to assemble our torch okay all of our attachments have a nut on them they shouldn't they should have a knurled fitting all right because you don't want to use a wrench on this stuff there's o-rings inside the torch bodies no matter what attachment you're using there's o-rings in there to seal the gas okay so if you reef down on this with a with a wrench adjustable wrench or whatever you can actually crush the o-rings and create a leak so it's important that all these things are hand tight only okay so just like anything else we're gonna sit it on there start it just hand tight okay with no need to throw a wrench on this that's why there's o-rings all right so get it on there crimp down on it just with your hand good to go all right so now technically our torch is ready for operation so in our two valves down here on the bottom our red hose is always your fuel gas in this case it's acetylene okay the green hose is your oxygen hose so in this case since we have our cutting attachment we're going to open our oxygen valve all the way up at the torch okay we want full oxygen coming up we're going to adjust our cutting oxygen up here on the actual cutting attachment so this is all the way open we're going to keep this closed for now until we light the torch and also always leave your fuel gas closed as well until you're ready to rock all right so now that our torch is ready we're going to step back here to the bottles and there's a procedure on how i like to do this okay so and it's really not how i like to do it it's how it should be done so start with your low pressure cylinder okay so acetylene on first and then when we shut down our torch acetylene off first so the field gas is going to be first on both operations okay big thing when opening your cylinders i don't care if it's a low pressure or a high pressure it's a good habit to be create it's you don't want to create bad habits so always open your cylinders slowly all right step on the other side of your regulator away from the pressure just in case god forbid something would happen you're out of harm's way okay so stand on the opposite side of your regulators slowly open the valve just crack the valve open okay and on your acetylene side we only need about a half to three quarters of a turn and why well it's for good reason if there's a safety issue like i said god forbid something would happen but if a fire would break out and you need to shut these cylinders down super quick this is the one you're going to have to kill the fastest because this is our fuel cylinder so by only having it open about a half turn you can get run over to it in two seconds you're shut down and you're out of harm's way okay rather than on your high pressure cylinders where you'd be here you know for a minute cranking this thing down on the fuel cylinder you only want to open it as far as you need to once there's pressure on the regulator that's all the further you need to open this cylinder okay so like i said about a half to three quarters of a turn should be plenty so now this cylinder is on oxygen cylinder same thing we're going to stand opposite of the pressure side crack it open slowly you don't want to jam that diaphragm you just want to ease the pressure on once you see pressure on the valve or on the gauge you can go ahead and open it all the way up it's a dual seat valve on the cylinder so you want to open it up again don't crank down hard on it just seat it because it will seat on both the bottom and the top so when you seal it closed it seats when you open it all the way up it also seats okay now our cylinders are on we're ready to set the pressure on our gauges okay with the pressures it's all about what size tip you're running okay so in our torch today we're running a single lot tips go from triple lot double up single lot 1 2 and so forth so forth the higher the number the bigger the tip so being a single lot 1-0 we're kind of in the middle of what most people would run out there this will cut anything from quarter inch to you can push it up to about an inch and it'll still cut under the same pressures so for a number zero and you can look up this chart online i'm not going to go through every single pressure scenario there's a tip to pressure charts all over the place just google it you run about three to five pounds on your acetylene and i'm going to run about 25 max out about 30 psi on our oxygen cylinder and to set our pressures you want to crack your valves open okay so we're going to set our acetylene pressure first crack your valve open on the torch and then we can start turning or tightening the regulator okay so as you tighten the regulator in you'll start to see the needle erase gets up to about five shut your shut off the valve do the same thing on the oxygen side remember this guy's already fully open so we're going to use the top valve on our cutting attachment again crack that open crank down on our regulator this one goes from 0 to 50 so 25 just put it about right in the middle there's no you know science to this just eyeball it is plenty funny good enough for this scenario the reason i like to open the valves is because if you shut the valve right now it's showing more pressure than i actually want so you want i only care about the working pressure the pressure i'm actually using while cutting i could care less what the regulator says right now under resting but when you crack the your valve open the needle will fall back to where you want it and you're ready to go whenever you use an oxy acetylene whether you're cutting welding with it whatever you're doing you want to use at least a shade five okay so shade five lens is pretty typical for anything related to a torch up here i've got a few options super comfortable option there is a downfall to these type goggles is that you can't wear safety glasses with them so depending on what kind of sight you're on and osha regulations per that job these might not always be an option personally i really like to combo these goggles with the clear face shield but it's not always an option so these here your standard come free with your torch okay most welding students getting into the game showing up for your first day of school it's pretty typical what you're going to see they fit terribly and you can't always fit safety glasses under them or if you wear eyeglasses these aren't always the best option okay they're just not comfortable especially for a long day of work so i think out of all the options just the shade 5 face shield is probably my go-to favorite one because i can it's easy if you wear eye glasses safety glasses whatever the case may be it's you can fit anything under this and you have full coverage so if if god you know anything could happen you're cutting metal gets blown back at you your full face coverage you're protected okay most jobs that i do get on require safety glasses and face shield if you're using a torch even a cut-off wheel you have to have both you can't just wear one or the other so that's where we're at right now but these are great i love them they're comfortable not always an option these comes with your torch pretty much toss these to the side focus on the face shields that's really where it's at industry standard most people are going to be wearing those in the plants so get yourself one again cheap investment this stuff i mean 15 so and the head gears last forever you can always get replacement lenses for them that's no big deal so for today's demonstration i'm going to go with the face shield it's comfortable and i'm going to be here a while so that's what i'm going to pick for today so we're going to do a couple of things all right we have one inch we have half inch and we have three eighths here a couple different options that they hooked me up with before i came down so everything was ready to rock and roll we're gonna do a straight cut on one inch plate and then any of you guys ever done any structural type work or anything like that you know if you go out to a blank pad you're doing from the ground up there's in-beds in the concrete already a lot of times they're in the wrong spot so you're forced to make a base plate on the fly so most rig guys structural rig hands will have plate in the back of your truck on your bed so i'm going to lay out a base plate for you guys torch cut some holes for concrete anchors part it off just like a scenario if we were out in the field because this happens constantly all right so we're ripping this one-inch plate down got a nice sharp soap stone okay combination square so depending on how big you need it you lay it out with a tape measure first but put our nice straight line on there got our guide clamped up set our distance do a couple dry runs make sure it's where we need to be okay and then we're ready to start start cutting so first thing we need to do is get our torch set right gonna get our torch lit gonna get it set okay we have three different flame types personally i always use a neutral flame okay so a neutral flame is what i'm going to set right now and i'll show you both flame types to get our torch lit first thing we want to do we're going to double check just to make sure our pressures are still where we need them to be all right so i'm running five on my acetylene bottle running 25 pounds on my high pressure oxygen cylinder okay so just like when we set our pressures red first acetylene first so we're going to open our acetylene valve first and light our fuel gas so just crack your valve you don't want this blowing out of here like a flame thrower okay so just about a quarter of a quarter of a turn just crack it open you're going to have gas flow take your striker go ahead and light it okay you can see all that black smoke coming off of the acetylene so you're going to ease your valve open until that smoke starts to go away alright so once that smoke starts to go away that's all you need you don't want it you know crazy amount of fuel and you don't see it starting to separate from the tip you don't want a little bit you can now you can really see that smoke don't breathe it in all right so ease out until that black smoke just starts to go away now we're going to do the same thing on our oxygen valve we're going to ease the valve open nice and easy then you can see on the inside of the flame you can see those cones starting to come together so now we have a nice sharp blue cone that's a neutral flame okay hit our oxygen valve just to make sure our flame doesn't change if it does we can adjust it then but see how it starts to shoot out on the inside hold your valve open and adjust accordingly until your cutting flame is also in neutral flame okay and we have a nice flame we're ready to rock and roll okay so now that we're our flame set our cutting flame is fine being a thick plate we're going to throw a little bit of preheat into it so just run your torch back and forth a little bit you don't have to get too carried away by no means does it need to be glowing red just get a little heat in there now we're ready to start cutting all right adjust our torch up just a hair so get comfortable i like to prop on something just hold your torch right on the end of that plate and so it gets cherry red okay don't jump into it too quick it's not going to want to cut you want to keep your neutral flame cones about an eighth of an inch off the material so now that that edge is starting to melt you can start introducing your cutting oxygen and then you want to go nice and easy okay keep a nice easy pace you don't want to start and stop you want to be nice and smooth if you go too fast you're going to outrun your cut [Music] another thing to think about while you're doing this is where are your hoses you definitely don't want them underneath with all that dross dropping and also when you're done this material is probably going to fall so the last thing you want to do is get it caught up on your foot or on your hoses so just keep aware of your surroundings make sure you know where all your stuff is while you're doing this so now that we made our cut just like we started our torch okay you start with your acetylene we're going to end with our acetylene so the first valve we're going to close our acetylene valve kill your fuel gas then the oxygen coming through your torch can snuff out that flame just in case it is burning back into your tip a little bit and then of course shut off your oxygen second clean cut take your grinder touch it up real quick again that's one inch plate one inch cut single lap tip it's pretty much pushing that tip to the limit but like you can see pretty slick all right now that we've got our cut out of the way on our one inch plate we're going to simulate some field fabrication if we're on a structural site maybe the embeds are in the wrong place whatever the case may be we need to make a base plate for let's say a four inch square tube okay so we have eight inch flat bar half inch thick we're gonna lay it out so i want a nice square so i don't know this this edge here is from the factory nothing we're doing right now is super critical so i think we're safe to go ahead and use that it's not too rough sometimes they come out of the factory or the mill they're really really bad but if we throw a square on it it might be a sixteenth out i think we're good to go okay so eight inch flat bar again we're gonna weld a four inch tube to it so we're gonna do an eight inch square so i'm gonna take our tape measure measure over eight inches again using a sharpened soap stone you wanna have nice precise lines it takes two seconds on your grinder so just take pride in your work and do it right the first time so go ahead and lay this out come over eight inches put a little little v right there go ahead and lay out that cut so we know that's the size of our base plate now we're going to lay out the four holes okay got to put concrete anchors in it so best way to do this i'm going to go corner to corner with it just using the blade of my square go ahead and lay that out okay so like i said we're gonna use a four inch tube all right theoretically speaking so we have an eight inch square four inch tube so eight minus four is four inches we're gonna divide that by two that's two inches all right so we're gonna lay out our tube before we even cut it or put holes in it and get everything laid out so we know where center on this tube on this plate is gonna be for our tube so i set my square to two inches because we have again an eight inch square four inch tube eight minus four you have four we're gonna divide that by two so we know it's two inches on either side of the tube all right so now we can just lay our square up here soap stone drag a straight line do the same thing on the edge drag a straight line come over here do the same thing and then since i can't do it from that edge i'm just gonna subtract two from six or from eight i'm gonna come over six inches from the mill side go ahead and drag a straight line there all right so now we know inside that box bam that's right where our four inch square tube's gonna be okay now we know how much real estate we have to cut the holes for our concrete anchors okay so i'm gonna center it so since we went two inches i'm gonna go one inch for the concrete anchor set our square to one inch bam come on over here and those lines that we marked corner to corner now that's our center line of our concrete anchor all right so we have a hole here and a hole here hole here and a hole right there all right obviously your hole size is going to be dependent upon what size anchors you're using but for a half inch plate half inch anchor should be fine so we're gonna use our torch we're gonna puncture with the torch go ahead and cut our circles out get all that cut and then we're gonna part it off and we'll have a base plate ready to rock keep this job going all right torch is still set up but you know what let's walk through it one more time because you can't hear this enough close our bottles down we're going to shut it down we're going to start from scratch walk you guys through it one more time a little review make sure you guys are getting everything you can out of this because safety is really the biggest thing with this shut everything down okay so again we're gonna ease open on our low pressure gas cylinder ease that guy open half to three quarters of a turn oxygen cylinder ease it open crank it all the way open so it seats on the top no leaks crack the acetylene knob i'm going to back out our valve first regulator crack that knob open about a quarter of a turn tighten your regulator until you get about five pounds close your valve oxygen same thing open your oxygen valve you're gonna turn that in so you get about 20 to 25 30 at the most for this tip size go ahead and close that as well all right we're ready to go ahead and light this fire let me grab my gear safety glasses it's much easier to fab this plate on a large piece of steel so that's why you don't want to part it off and then cut your holes it's easier to do everything you have to do to the plate first and then the last thing you want to do is part it off okay so go ahead and light it grab my striker crack open our acetylene about a quarter of a turn get it lit ease out on a little bit add our oxygen till we get that neutral flame okay see those cones get nice and sharp if you go too far see how they thin out gets loud you hear that hiss that's an oxidizing flame okay if you have a long neutral flame that's your carburizing flame okay it's too more fuel gas than oxygen so you want to be right in the middle nice sharp cones nice neutral flame again always check your oxygen valve to make sure your flame stays uniform in this case we're ready looks good so we'll go ahead and i'm going to cut these holes and then we're going to part it off all right come down right in the center of your hole okay i'm going to be right in the middle we're going to sit there until it gets red don't try to prematurely puncture it then you're asking to get a face full of metal so and sit there let it get hot you can pop your oxygen valve real quick to give it a little test to see if it starts to cut or not see how it starts to spit out so that means we're pretty much ready to go so go ahead and hold your about eighth inch uh distance of your fl your flame cones off the material we're going to go ahead and puncture okay and then from the center we can come out these holes were just eyeballed i didn't measure anything on those because not really sure of the size of our anchor and this is for demonstration purposes so go ahead and use your torch get that nugget out of there there's our first hole do the same thing over here go pulse it see if we're gonna start cutting there we go let's go ahead and let it rip come on out from center and you always want to try to be as smooth as you can with this again it's just an anchor hole so nothing critical here we're just trying to get the job done [Applause] all right go ahead and turn off your settling valve first and then your oxygen valve go ahead and get our straight edge clamped up here again we use the the tip to actually set our distance so you want to be just on the other outside of your line let's do a quick dry run make sure it's nice and straight go ahead and clamp that down settling on okay again be mindful of where your hoses are this plate is gonna fall watch your hose your hoses and your toes it's already pretty hot from cutting our holes so we shouldn't need a preheat again nice and smooth smooth as fast thanks for tuning in today guys little gas axe action for you so hopefully you learned something i push this on my students because safety is number one it's all about the only thing in the lab that you can really hurt yourself with so as basic as it may seem it's information everybody needs to know make sure you check out weblife.com use discount code warrior welding tx and again the st juke campaign get on board with us raise some money for these families that really need our help and get yourself some merch like this wildlife.com guys we'll see you next time [Music] you

Channel: WeldTube

Views: 230,900

Rating: 4.9143066 out of 5

Keywords: arc welder, mig, pipeline, welding, welder, welding shop, GMAW, SMAW, welding definition, pipe schedule, cwi, how to weld, types of welding, welder salary, welding symbols, schedule, 40, pipe, welding supply store, Tig, welding jobs, welding schools, tulsa welding school, american welding society, weldporn, weld.com welding tips and tricks, ChuckE2009, learn to weld, pipe welding, welding basics, welding techniques, welding test

Id: c8qjgmJzNl8

Length: 26min 29sec (1589 seconds)

Published: Mon Jun 07 2021