Intro to Oxy-Acetylene Welding

[@andrea-er3id]

Wow, this helps so much more than our instructor. If we have a question also, he will get upset with us and he expects us to automatically assume we know.

[@WeBuildStuff]

Thank you. Regardless of age I assume students have zero prior knowledge. If it is for post secondary in an actual welding program than I would expect students to have done reading on certain topics prior to some practical lessons in order to better understand the terms and some basic terms. For high school I break these lessons up into chunks starting with safety checks and regulator setup before they get to light a flame. If I've taught the lesson more than 3 times to the same kid and they aren't doing their part to remember or take notes then that is on them and it can be frustrating. But.... I am also very chill and as long as students aren't being jerks I will always remind them of the steps or little tips. I started making videos specifically to help kids that had a hard time remembering lessons. I can point them to a section in a video and then if they still need some clarification (because my videos are not always perfect) I will still help them. A teachers job is to teach and build good connections with their class. I usually only get frustrated when things get broken due to carelessness or if kids are too lazy to put any effort in.

[@quail4sale334]

To those critiquing the fully open oxygen tank...YOU are the dangerous operators. The oxygen valve is a "double-seat" valve. It is only in a safe position when it is seated one direction (closed), or fully seated in the other direction (open). That is OxyAcetylene Welding 101. Also in OxyAcetylene Welding 101, the gas valves are only partially opened so they can be closed quickly in an emergency. This is safe & acceptable because they are not double-seat valves. Now, for all the shop Nazis who got this quiz wrong, please go tell your shop instructors you want a refund, because they failed you.

[@apexmetalrestoration2805]

Thank you for this informational video man! You’re a solid instructor. Your students are fortunate to have a teacher that cares.

[@WeBuildStuff]

And I am fortunate that you watched the video! Thanks for stopping by!

[@mrgfcwelding4479]

You need to search a little harder, because this is a very, very bad video. It's showing you something at the very beginning that could get you killed.

[@eddiecard]

Best video by far. Thank you for going over every step for beginners like myself.

[@WeBuildStuff]

Thanks for watching!

[@ActinOut]

I've been looking forward video that reviewed all the procedures for startup, shut down, purge and emergency shut off. Best one I've found with the best details. Thank you.

[@mrgfcwelding4479]

You need to search a little harder, because this is a very, very bad video. It's showing you something at the very beginning that could get you killed.

[@ActinOut]

@@mrgfcwelding4479 thanks for the heads up. I have spent a lot of hours searching. Please enlighten further...

[@mrgfcwelding4479]

@@ActinOut @We Build Stuff kzbin.info/www/bejne/g2HYeXV5oM6WqZo they go through the entire reason between both tanks. Also, kzbin.info/www/bejne/eJTbZYSYpZd1gZI at about 11 minutes. kzbin.info/www/bejne/a5XGhoOehsZrers opening correctly is shown (about 13+ min.), but not stated. kzbin.info/www/bejne/nYnYfneujsqkkJY

[@michal5306]

Your videos are just like oxyacetylene cutting better than your last one !

[@WeBuildStuff]

😁 thanks for watching!

[@salalaos1641]

This long version seems to be the much better video than two parts and much better camera angle too! LoL!

[@WeBuildStuff]

Thanks. I had some mistakes in the old ones so I needed to make an update video

[@brunosyoutubekonto4712]

In germany we are open oxygen first and than acetylene and than we are ignite the burner. To turn it off we close acetylene first and than oxygen. So we have every time a clean tip

[@keystonekreative2174]

Wonderful video and so thorough! Thank you!!!

[@firstmkb]

I’m an amateur who has spent more time watching videos than welding, so take this with a grain of salt. What I’ve seen most often for people welding steel coupons on firebrick is to bridge them over a gap between the bricks, instead of laying them completely on top. I suspect the bricks are absorbing of the heat from your steel, making full penetration difficult. Air doesn’t absorb as much heat, and I think you’ll really see a difference. On turning off the torch…. I’d put safety ahead of a sooty brick! For example, if your hand is on fire, which is worse - having a sooty flame or pure oxygen near your burning hand? Thanks for sharing! You’ll make a longer impact on those kids than you would believe. I can still hear my shop teacher, Mr. Beisel, almost 50 years ago repeating “You will attach wood in this class using either nails-and-glue or screws-and-glue.”

[@WeBuildStuff]

Solid tips. The comments section is a great way to help others and give me a chance to continually improve what knowledge to pass on to others and myself!

[@Airon79]

I was thinking that too , like putting NOS on a flame .

[@PeterStuartJr]

Request: a video describing the different types of steel you would weld with OxyAcetylene, and how to choose the right stick (is that the right word?) to work with. Also, it would be cool to see a summary of the different types of welding and their applications. Thanks for the great vids!

[@WeBuildStuff]

Good idea. I can put that on my endless list of future videos 😀

[@PeterStuartJr]

@@WeBuildStuff Great! Inspiring me to pull my tanks out, clean everything, and start experimenting.

[@WeBuildStuff]

@@PeterStuartJr experimenting is pretty much 90% of what I do!

[@alirageef]

Thanks a lot Sir for the informative demonstrating.

[@WeBuildStuff]

thanks for watching!

[@eugenejuen3687]

Thanks bossman

[@gtb81.]

in the first video when you said to turn off the acetylene first i got very concerned because i had always turned off the oxy first and thought i'd been doing it wrong all this time

[@WeBuildStuff]

I meant to say in the first video "only turn off acetylene first in an emergency because the flame will stop right away". It was a bad habit and that is one of the main reasons I redid it in this video. I've left the first video online because it is still a good resource for my students

[@gtb81.]

@@WeBuildStuff understandable, good on you to correct it

[@WeBuildStuff]

@@gtb81. Thanks!

[@rickysinaga4168]

good show. what is the name of the spark ignition tool for replacing matches? Thank you

[@WeBuildStuff]

Flint Striker/sparker

[@jaysharbutt5466]

Is there a way fro you to mark this video as educational, it's being blocked by youtube's content filter at my school. Thanks!

[@WeBuildStuff]

It is setup as "educational/how to". Your school network i probably the issue. Contact your IT department

[@WeBuildStuff]

I did some tweaks. Try again and let me know if it works

[@thebluelunarmonkey]

Have you done a video on bottles (ie: slick neck vs banded) and how to deal with airgas and other sellers of gas for those getting started? acetylene, oxygen, nitrogen, etc. Also leased vs CO bottles and DOT certification?

[@WeBuildStuff]

I really don't know enough it other than it is expensive trying to supply enough for 200 students to use in our metalwork and automotive classes here!

[@WeBuildStuff]

We pay a monthly rental plus the cost of gas. It is probably the most expensive part of our programs

[@Rattletrap2]

3:05 Flames shooting out around your hands is precisely why you and your students should never be handling a torch without your gloves on. If you want to wear the shade #5 face shield, great, but you need clear safety glasses on under it.

[@WeBuildStuff]

Double safe with your glasses is always a good idea

[@mickles1975]

I'm kinda surprised you didn't mention the reverse threads on the Acetylene hoses.

[@WeBuildStuff]

My students don't need to worry about that as I don't let them change the setups without me present. Thanks for the comment

[@mickles1975]

Ah ok. I didn't realise you made videos aimed at your students. Thanks for the reply.

[@WeBuildStuff]

@@mickles1975 for sure! If the general KZbin community enjoys them that's a bonus!

[@mickles1975]

I definitely am. I came here trying to remember what I learned 30 years ago and your videos have been doing that for me.

[@WeBuildStuff]

@@mickles1975 that's awesome that these have been helpful!

[@laszlovona]

one question, why not using a lower limit/scale gauge on the O regulator? I was wondering that all metering devices provide really low accuracy at lower part of the scale so why using 2-300psi gauge if one wants to set 10 or so PSI? pls advise. cheers! 👍

[@WeBuildStuff]

This is what is usually available from the suppliers in my area. I do wish that the oxygen regulators had better low accuracy since I typically stay under 15 psi

[@WeBuildStuff]

I also just get used to it and usually draw a line with a felt marker on the outside of the gauge for students.

[@laszlovona]

@@WeBuildStuff thanks for the info! 👍 it makes sense now..And at the end of the day if you are used the 'behavior' of the valve and you can still tune O flow at the torch it is just fine. Btw I am complete noob in oxy-acetylene welding and your videos give really good guidances.

[@alexanderstefanxandraswedi5835]

Great

[@curiousjericho]

Please do a brazing video!

[@muhammaddanishshafique]

Would you allow me to use your videos for teaching students in my university? It will help me teach them with ease and comfort as it will remove my need to record my own videos. I will be grateful to you but I am not able to help you financially. I will be looking forward to your response. regards Engr. Danish

[@WeBuildStuff]

Schools may use only if streamed/shown from this KZbin channel. Do not download/steal or use offline. This has happened before and I have had to send copyright notices to them before for stealing and reloading to their own channels. You may link to the original video.

[@muhammaddanishshafique]

@@WeBuildStuff Alright, this is why I asked, I have referred your video for course content, and I am thankful for this video as this is way more sound than various other videos available on youtube and your channel. I am not a professional youtuber, I am a university teacher, and either way, its useful.

[@WeBuildStuff]

@@muhammaddanishshafique Thanks! I hope your students enjoy streaming and learning from it!

[@mrgfcwelding4479]

Dude, Are you seriously going to teach people to do something that can hurt them right when they start? If he were my employee he'd be fired.

[@maddex_jb7348]

Cool!

[@aliali-et7xh]

good video sir..

[@WeBuildStuff]

Thanks for watching!

[@zoozolplexOne]

Cool !!!

[@xolilemlangeni2871]

❤❤❤

[@ClintL63]

I cant see the puddle; how do you see that? it just looks like a yellow blurr; I still dont know what you did

[@WeBuildStuff]

I need to buy a special filter so i can film it better. Basically looks like a little liquid puddle and you manipulate it around with the heat😁 thanks for watching

[@Airon79]

You could probably put some welding goggles/lenses over your camera .

[@redpost2380]

Excellent video BUT when it comes to turning off the torch you got it backwards. You had it right in the previous video/. At 17:04 and 22:40 you turn off oxygen before acetylene. You give the right reasons but have inverted the gases. You don't want acetylene soot to build inside the torch, therefore you must turn ACETYLENE OFF FIRST. Oxygen does NOT burn and it leaves no residue. Acetylene does. Oxygen accelerates and intensifies the combustion of the fuel, be it acetylene, propane or hydrogen. Acetylene burns without oxygen. In fact you can burn acetylene and oxy/acetylene under water. You saw what happens to the brick when you turn off oxygen first.... a lot of soot. That also builds up inside the torch which is why you want acetylene off first and let oxygen purge out the torch. You say that your torch manual says to do O before A. Hard to argue that, but if you look at the chemistry and physics of turning off the torch A BEFORE O is the GO

[@Nyzioable]

Incorrect. Normal atmosphere is composed of ~21% of oxygen. This means that without additional O2, even a high concentration of acetylene (ie. during startup) can only burn so fast / hot. You're oxygen limited, which is why you get soot (incomplete combustion). However, if you open the oxygen first, you'll get a much higher concentration immediately around the ignition source. As the built up acetylene and oxygen ignites, you end up with a much faster, hotter flame front (in every direction). Theoretically any pressure imbalance between the lines could cause backflow and flamefront propagation leading to an explosion. So oddly enough it's fair to say oxygen is the more dangerous part of the equation, and always the thing you want to introduce last and remove first. :)

[@shreddder999]

you need to give the camera a shade.

[@WeBuildStuff]

Yes hopefully next time I try a video like this. I need to build a stand to hold both the camera and a shade

[@colubrinedeucecreative]

@@WeBuildStuff You can do it in post, just lower exposure.

[@WeBuildStuff]

@@colubrinedeucecreative thanks. Maybe for the next one!

[@Maxspeed7Dude]

Can you weld anything with an oxy-accetelene torch?

[@WeBuildStuff]

You can certainly try to weld anything...... I typically work with Steel for 95% of my work (aluminum for the rest with a tig welder) so I don't have a lot of experience with other materials

[@Maxspeed7Dude]

@@WeBuildStuff lol I meant like weld any shapes of materials, for instance I want to build a go kart Frame

[@WeBuildStuff]

@@Maxspeed7Dude oh of course! This video just shows a butt weld. You can weld any angle or style with some practice. For a frame I would practice with filler rod, butt joints, t joints, etc. Some welds may need two layers and maybe some practice pieces that allow testing your weld strengths.

[@leonardpearlman4017]

@@Maxspeed7Dude Welding frames for cars and aircraft is a main use for oxy-acetylene... you can weld or braze. There's a lot of literature about this. The book PERFORMANCE WELDING covers the whole field. TinManTech is mostly about this kind of thing. There are a LOT of old books about Aircraft Welding! Get one!

[@Maxspeed7Dude]

@@sparky4581 lol I think you accidentally replied to my comment.

[@haircutboys]

At 12:35 you say "we have a nice neutral flame" but don't define what that means. Once you start welding at 15:00 you might as well shut off the video because we can't see anything in the glare of the flame (maybe put a filter on the camera?).

[@WeBuildStuff]

Thanks for the tips. These videos were originally designed as supplemental information for the classes I teach. They receive other instructions and not just what is shown in this video. I do regret not setting up a proper filter for my camera when filming this one. I hope there were some helpful parts in the film for you. Neutral flames are when there are equal parts oxygen and acetylene. For students I teach them how to identify it by the look. I've changed it since this video. Thanks for watching.

[@naidugaruabbai6752]

Hii sir

[@dayeenergy3510]

Hi ，there is an New technology, water and electricity produce flames, throw away your oxygen and hydrogen tanks, also not need the Professional training

[@dayeenergy3510]

kzbin.info/www/bejne/qKu1oneQgZykjrM

[@simsa7868]

Nice bullshit

[@stevee7774]

Lol.

[@roggerhattip1736]

OMG, you cranked the valve wide open with the gauges on them? Do you have a DEATH WISH? You don't do that even if it's a low-pressure tank!

[@giornogiovanna4065]

You only open the Oxygen valve fully and NOT Acetylene valve

[@michaelboyle7668]

You are a very good welder not.

[@mrgfcwelding4479]

Dude, Are you seriously going to teach people to do something that can hurt them right when they start? If you were my employee you'd be fired. You never, even if it's a low-pressure tank, crank the valve wide open with the set of gauges on them. The only time you crank It Wide Open is when you're opening it to blow out anything that might be in the threads, before installing the gauges. By cranking them wide open with gauges on them, those gauges can explode, striking the person in the face, blowing parts across the room, and causing physical damage and a ton of other things. If you went to school and your instructor didn't teach you that, shame on him. But shame on you for teaching this on KZbin, when it can kill a person in reality.

[@WeBuildStuff]

I'm not going to bother defending the way that I was taught or from all the manufacturers recommendations but I'm curious if you can link some case studies or first hand experience on your opinion. Oxygen tanks are meant to be fully closed or fully open for safety. wha-international.com/oxygen-cylinder-safety/ "It’s important to note that oxygen cylinder valves have different construction and application from oxygen regulators. Cylinder valves are designed only for “isolation” purposes. As such, they should be operated either completely open or closed. Never partially-open an oxygen valve and leave it to “throttle” or control flow. Although it’s extremely rare, this improper operation can lead to ignition of the plastic valve seat." "Cylinder valvews should be opened all the way. Open the oxygen cylinder valve stem just a crack. once the needle on the high pressure gauge has stopped, open up the valvue all the way. This back-seats the valve. "Oxygen cylinders must have the valve opened all the way because of the high pressure in the cylinder. There is a back seating valve on the oxygen cylinder. This prevents the high-pressure gas from leaking out the threaded stem."

[@mrgfcwelding4479]

@@WeBuildStuff kzbin.info/www/bejne/g2HYeXV5oM6WqZo they go through the entire reason between both tanks. Also, kzbin.info/www/bejne/eJTbZYSYpZd1gZI at about 11 minutes. kzbin.info/www/bejne/a5XGhoOehsZrers opening correctly is shown (about 13+ min.), but not stated. kzbin.info/www/bejne/nYnYfneujsqkkJY @ 9:30

[@mrgfcwelding4479]

@@WeBuildStuff I've seen gauges explode and not just welding gauges. SCUBA tank gauges, gas line gauges... The inside mechanisms of gauges are not designed for sudden hi pressure increases. Yes, once they have been put under pressure, your comments above are correct.

[@WeBuildStuff]

@@mrgfcwelding4479 good tips

[@redpost2380]

​ @mrgfcwelding4479 It is desirable to use safe procedures but making outlandish and vastly untrue and exaggerated claims does not help anyone. "By cranking them wide open with gauges on them, those gauges can explode, striking the person in the face, blowing parts across the room, and causing physical damage and a ton of other things". No need to put out such untruths