Machinist's Minutes: Bottles and the gasses in them
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- čas přidán 20. 10. 2023
- This is part of a series whose goal is to cover as much as possible about flame techniques: welding, cutting, brazing, etc etc. Related videos are linked at the end of the video and can be found in the associated playlist.
I grew up in a welding shop. My dad used two "Sitefeed"acetylene geneators. Us kids were tasked to clean and refill them every Saturday. The inside of the tank had to be inspected for deposits of carbide and cleaned thoroughly. They each used 25 lbs. Of 14 nd carbide. We were told that the acetylene would explode at 28 psi so the pressure was always maintained at 15 psi. The lime slurry went into a deep hole next to the generarors.
I once bought a large helium bottle off Craigslist. Took it to the local welding supply and they claimed it was theirs. I swear I argued with the old man for 15 minutes. Finally gave in.
Lesson learned.
My god man, thanks for your knowledge. I am going to YT University as well, you are definitely one of the masters to learn from.
Excellent video it's a very gray area with the gas tanks here in northern Minnesota the suppliers keep consolidating and changing names I deal with the local hardware store and years ago I was going thru 4 251 big oxygen tanks per day and they got me to switch to liquid oxygen for a few months to finish the big scrap cutting job I was doing the liquid oxygen was awesome other than when it would vent in the hot sunlight then it scared everyone around me
Thanks John, very informative. My dad had one of those miner's headlamps, he put some calcium carbide in to demonstrate it to me.
My dad is the chief engineer for the power plant in a papermill and he has several natural gas skids trucked in per day for the gas turbine.
My local repair shop used an Acetylene generator with calcium carbide up until probably 1990 or shortly beyond. It needed water in the machine. You could not let it freeze. I remember us as kids throwing a tablespoon of calcium carbide in the mud puddles in front of the shop and the whole puddle would light up. I have an empty Cal carbide keg.
Just like you mentioned, Acetylene at one time used an adapter to use acetylene. My very first tank used an adapter. It now is hanging unused in storage out in my shop. Now it appears to be obsolete.
I remember in my college fabrications class we were taught that the stuffing core in acetylene pressure vessels was an asbestos core in the older tanks and balsa or fiberglass in newer ones . And I vaguely remember being charged a hazardous disposal fee years ago trading in my grandfathers 1970s owner acetylene tanks for new ones when I inherited them (but that was California and 20 years ago so who knows could have just been a gotcha charge at the gas store 🤣)
Nice talk and stories. Thanks!
Interesting, informative discussion. Thanks!
Thanks John!
Thanks for another great video 👍👍
Good morning everyone hope everyone is having a blessed weekend
Thanks for the show Howie 🍻 🇦🇺
Thanks Howie, always good info from you
Nice video! I was told by a gas supplier years ago that the smallest acetylene cylinder (10cu ft.) is called an "mc" and the reason for that is it was first made for motorcycle lighting. The next size up is called the "b" (40 cu ft.) and it was used for bus lighting. Not sure of the truth of that but I saw an early motorcycle in a museum that had the mc tank horizontal across the handle bars. Also the male connection for full size acetylene cylinders is still in use today, and it is known as the cga 300 configuration.
That’s what I heard, not sure if its true or not.
Mc was used for motorcycles for sure never heard of the b for bus though
Some fun facts:
oxygen comes in 3 basic groups of purity: industrial, medical, and aviation. Industrial is not considered safe to breathe, medical is pure(pure enough to breathe) but can have water vapor in it, aviation grade is "purer" then medical grade in the sense that it has no water vapor in it because when at altitude you don't want that tiny bit of water in the oxygen to freeze inside a pipe or tube from the cold.
Most scuba tanks will be filled to around 2800-3300psi and require a hydrostatic test every 5 years depending on local regulations and a visual inspection every 1-2 years again depending on local regulations.
Scuba divers sometimes use Enriched Air Nitrox aka Nitrox/EANx, this is a gas mix with a higher percentage of oxygen then standard atmospheric air. scuba tanks that use Nitrox have to be specially cleaned and labled because there are 2 main methods of filling them 1) mix the correct ratio of nitrogen and oxygen in a bigger storage tank and then fill the scuba tank, 2) fill the scuba tank with one gas to the correct partial pressure for the ratio of nitrogen to oxygen, then add the other gas until you reach the final pressure, with the second method you run the risk of exposing the tank too pure oxygen so the tank has to be cleaned so that there is no grease or dirt that could cause the tank to explode when it comes into contact with the pure oxygen, so even if you want regular air in the tank you have to fill it in the same way as Nitrox so that the tank stays clean.
Great info man, thanks.
Small world. I live near Vancouver Washington
Propane makes an awesome refrigerant in expansion valve systems.
Can make an awesome heater too, in the same systems. lol
Isn’t it called R-290? I have done some research for a truck a/c replacement. Uses like 40% of the R-134a and the pure stuff has an auto ignition of like 1,400F which is slightly above the R-134a. Thoughts on this?
@@25aspooner that's possible, I just use a gas grill bottle and an adapter, I know there was some stuff years ago called Red Tek 12a and I think it was basically butane.
I work for Danfoss and we use a helium detection system for our food grade heat exchangers, with a recovery system mind you.
We have spent alot of money keeping the leaks to a minimum. Helium likes to get away for sure.
22:08 hilarious. I think I threw my back out laughing.
i actually have one of those craftsman oxy propane kits. from a yard sale. came with three bottles of o2
Oldest hydro stamp I’ve seen on a bottle was 1919 or so. Got a picture of it somewhere. I use a lot of 300CF bottles of nitrogen, I always look at the stamps. Not uncommon for us to use 6 packs or 12 packs. Pressure test the equipment I work on to 70 psi or so. Refrigerant bottles, largest I have used so far was 4500# tanks, those were made in the 40’s.
Ever notice how some cylinders never miss a test date? Every few years like clockwork it gets stamped. They probably finally have to discard the cylinder only because the neck has been weakened from all the stamp marks. lol
Other cylinders seem to go MIA for several decades between test dates. They must get parked in a corner somewhere and time slips by?
HA I have you beat. I saw a Linde bottle stamped "1917".
@@tracylemme1375 Nice. I think it is pretty neat to look how old the bottles are.
In my market consolidation of the gas industry due to regulations has wiped out independent suppliers. I got my first set of customer owned bottles as a gift when I graduated high school in 1984. My account has been bought several times and I have always been grand fathered in customer owned. The current multi national company that has my contract hates customer owned bottles. They are charging 2x the price of another supplier 150 miles each away. Which I do for big jobs (several bottles at time) There is so much B.S. Grey area on bottle ownership. It is usually at the discretion of the plant mgmt. Unless you have a paper trail. You should have seen the plant Managers face when I pulled out my original papers from 1984 and receipts from the other companies that had serviced my account over the years. With out that I would have been screwed out of $5000 worth of bottles (about 10 at this point.) Obviously I am still getting screwed on gas price because I don't fit their rental business model but at least I still have gas access.
I recall having seen a lot of 1906-1908 build date O2 cylinders; that must've been when production really took off.
I sort of think I recall seeing a few older, but I'm not positive now. Possibly '01? Again, I'm not positive on that.
Cylinders would get "busted down" with age to be used with lower pressure, less "critical" contents. So the more aged cylinders would often be found in CO2 etc. service.
The legend was that they were supposed to be taken out of service at 99 years. Not sure if that's fact.
nice video, i had friend who work gas business all life, boss of staff big company here finland, he tell me respect acetylene bcos it can kill you and all if not use right.... so good someone tell this to all, just check all bfore do job whit gas, in here we have too much regulation but .. good videos i hope you make much more.
Not related to your video but I was wondering if you have a video on tri mics in my mind I don't understand how they could check for out of roundness in a bearing housing for example. Could two points hit and one be not touching at all? (egg shaped bore) Thank you for your time hope to hear from you
I think helium can be manufactured in atomic reactors.
Anyway...
Helium is abundant in the universe.
But in limited supply on earth and when it's relased, it excapes the earth's gravity and on into outerspace.
Did anyone here ever experience flame flash-back on your acetylene bottle?
The books either say "RUN!", "turn up the oxygen to pull the flame out" or "put the torch in a bucket of water". It all seems like BS to me apart from running away if your hose is already on fire.
I had a flash back once before we had arresters , blue a hole in the hose about 4 foot from the bottle that was burning so I just turned the bottle valve off and the fire went out and I am sill on the planet
@@marsterofnotradesGood move. Closing the cylinder valve(s) is probably the best response for most such situations.
Do you want to sell that cryo cooler? I have some YBCO experiments coming up that I will need liquid nitrogen for. I would rather not have to build a cascade system or buy liquid nitrogen if I don't have to.
...looking at the floor grates.. who is Keith?
the gas place I buy from charges a test fee for expired tanks
My lease it 75 dollar a year I think it's worthwhile cause they want 570 for a bottle well by the time I pay that in rental I will want a new bottle.
Crazy how expensive gases are
They have natural gas cutting torches
Damn $35 a bottle, I bought several K oxy bottles from a guy for $200. I don’t know where he was getting all these bottles, and I don’t think I want to know.
You some free oven gloves with them? UK joke for hot stuff (long term borrowing without owner knowing about it)
It's the word smaller NOT littler. Otherwise, excellent presentation. 😊
Gasoline in an oxygen bottle, yikes, stand clear
The college boy thinks you have to much clutter . They want lean manufacturing
If you make the parts right with a CNC you would have no need to glue them together with any of that old school stuff.
LOL
I like Howee, but he diverges so much that he often doesn’t get to the point. If I didn’t already know this, I would be confused by the time I got to the end of it. The one thing he didn’t mention that is important. While we’re never supposed to store, or transport gas bottles while on their side, I know a lot of people do. And for most gasses it’s ok, thought I don’t recommend it. But acetylene bottles should NEVER be put on their side, even for a very short time.
You can but leave them to stand for a hour or two before doing any thing with them, its a good idea to leave them stand for a bit if they are moved around shook or leaned over as well
Good feedback but the camera guy can't take good feedback so you can expect a defensive response if anything.
It's about liquid vs gas. For a blow-off valve to best vent a cylinder in the event of over-pressure it should be able to vent gas. A cylinder's orientation should be such that an over-pressure event would have gas at the vent; not an issue with some contents.
@@marsterofnotrades you shouldn’t. No matter how they make the matrix inside, you don’t want the acetone to flood the valve.
@@melgross Honest question. Why? Bought the small Oxy acetylene like he has recently and I’d like to not accidentally do something very wrong.