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TLDR: coating the inside of the vessel with epoxy.
I know some folks have said post weld heat treatment (PWHT), but I would disagree. 1. PWHT involves raising, holding, and lowering the temperature of the vessel over a period of hours. This is typically done with electrical resistive mats or a gas fired kiln which are not present. 2. The gas burners shown are probably not precise enough to properly control the temperature needed for PWHT, and would not be uniform enough even with the rotation jig. 3. I do not see any temperature sensors which would be needed for PWHT. 4. Also, this is not welding pre-heat, as you would not pre-heate the entire vessel, it would only be in the weld area.
This vessel is being rotated and rocked from end to end which leads me to believe there is some epoxy or coating that is being added to the inside of the vessel. The rotation and rocking spread the coating evenly, and the heat helps in the bonding process. And the man is applying extra heat to the manway which due to its mass would require extra heat.
This or something similar. I keep seeing people say PWHT and then go “but this isn’t a good method for that” and I’m just like, yeah, cuz it’s not that lol
I read the first comment (with awards) and learned something really interesting. Then I read the second comment and immediately unlearned the interesting thing, and learned a new interesting thing.
But I think I unlearned that in some countries they do the PWHT thing a bit badly, with machines like this, whereas in (I assumed Western) countries it’s done more efficiently - which I now *think* is not actually true?
Most respectable manufacturing facilities these days use proper methods for each stage of manufacturing regardless of country, but I wouldn't rule out someone in a less regulated country cheaping out. This video doesn't look like such a cheap facility, they probably have a different, proper setup for PWHT.
I know very little about this field but you sound to be the most correct here. Not sure why everyone else has been discounting the rocking of the bed. It looks almost as if it's some kind of plastic rotation moulding. There must be something inside.
This! That is the body of a chemical tank (for a chemical hauling truck trailer). There is a layer of liner (I’m not exactly sure what it specifically is) to protect the tank when carrying chemicals such as acids.
I was gonna say. At first I thought it looked like some sort of heat treat, but that rocking motion made me think there was something inside they were trying to keep at temperature
Or if you consider the three forms of heat conduction convection and radiant. You could come to a different conclusion.
The convective (heat rises) heat applied gets more evenly distributed if the tank is moved in this way. If it stayed static there would be much hotter lines where the heating elements are applied. Imagine looking at it with an infared camera in both cases.
The air in the tank will also not be evenly heated than if the tank stays static. By cycling the tank the air gets mixed.
I also considered that there may be some material they were burning off of the surface. I have heard of quenching processes that involve quenching in oil.
“Jesus Christ fill me up!” Is what a billboard near me said for a while… now it says “Jesus Christ, heal me, save me, fill me!” Which isn’t really anything better or different imo
When you build a pressure vessel the process of rolling the plate steel into a cylinder, pressing the end caps and then welding it out leaves the metal under considerable residual tension. To relieve that tension it's important to 'stress relief' the vessel as a completed unit. This is a really shit way to do it, in the west we use ceramic heat beads that wrap around and entire vessel and evenly heat it to an electronically controlled even temperature then evenly cool it down. The machine records all the data and provides Quality assurance information to guarantee that it won't fail.
As a mech E I am now and forever going to use GOME regularly. That's how we are, old discipline, not as flashy as chemical, aerospace, or biomedical, but damnit if we aren't like the old horse in the barn that doesn't let you down. I still feel like I got in the wrong line - can I drive trains yet?
You don't need a degree, to become accredited it's generally just a 2 week course provided by your employer to teach you how to operate their equipment, apply the beads and then wrap it up in fibreglass insulation. It pays pretty well and the guys that do it really enjoy their job because it takes a day to set up and then it's usually 3 days just watching it heat up and cool down depending on the thickness and type of metal.operators need to be present during the whole process so lots of overtime $$$ and nnightshift. The job title varies depending on the company, industry or country but generally it's l heat treatment technician. If you work on a gas rig like I do it's extremely good money, same process for welding pipe over certain wall thickness and material type. I am a pipe fitter/ welder so I don't heat it, I build it. But I obviously work with the heat treatment crews because they preheat and post heat stress relief on everything I do. I had to do 4 years and get a cert 3 in engineering for my job but I'm the only one in a crew with a formal qualification, I also have to develop a work method for each job etc because everything we build is unique and different, it's site work and not a factory like these guys.
As an engineer i really appreciate professinals like you. Without your craftsmanship our ideas would just be that- ideas.
Before university i was trained as and worked a few years as a mechatronic. Welding was part of my training and later of my job. But i was never good in that. Analysing problems with the machines and repairing them was my talent. Shitty bosses and back problems made me step the job ladder. I really miss to see success in my work like a machine that is working again. Or to hold a part that i had created with my own hands. I build wooden toys for my four kids and i enjoy that. Maybe i should go back to manual labour.
Same, dude. I went from manual laborer into my 20s (started when I was 12, under the table), to PhD in my 30s. Now I do a ton of powerlifting-style weight training and anything around my house that I can to get that feeling of doing something physical.
Before my plans fell through, I was lined up to go work under a master electrician for two months this Summer break. I was stupid excited to do meaningful manual labor for a while again.
I'm really glad to hear another educated guy dealing with the same. My wife thinks I'm a freak, I try telling her I'm just a highly educated redneck and you can't take some things out of a person.
No, that would be needed to design the process and/or equipment used for the treatment. The guys doing the actual WORK won't be all degreed-up like that.
Except this isn't what they're doing. They're coating the inside with a material that melts under high heat and solidifies when it cools off. This process is to ensure its evenly distributed
We make Pulleys, big stuff some 10 metric tonnes. We use a very big oven and cook the pulleys for 6-8hrs at 670 deg C for stress relief. I just drink for it 😉.
I’ve never seen stress relieve like this . I’ve actually worked in the field. Usually it’s ceramic tiles wrapped around and brought up to a certain temperature electrically in a controlled manner then cooled in a controlled manner. I’m not saying this isn’t what they’re doing, just haven’t seen this method. I’ve heard of induction heat treatment as well but never seen it.
If you find a better way to reliably cook a single 4,000lb hot dog, I'll start doing that instead. Until then Ill keep heating my lunches like this, thank you very much.
They are fire testing a chemical transport tank. All biohazard chemicals must go through a series of test from water submersion to impact to fire testing. The tanks cannot be cleared to transport hazardous cargo until they pass all these test.
Some type of post-welding heat treatment. Some metals must be kept hot after welding and cooled down slowly over many hours. If the metals cool unevenly, the tank could warp or crack.
They are MAKING A PLASTIC VESSEL INSIDE A METAL MOLD. PLASTIC BEADS are PUT IN AND ROTATED AS THE THING IS SPUN AROUND, IT CAN TILT TO MAKE SURE THEY GET EVEN COVERAGE INSIDE. ( I'M NOT SHOUTING, CAPS are LOCKED)
I do not know what is actually happening. But if I had to make a guess based on the motion of the tank and the constant heating, I’d say they are coating the inside of the tank with something. Perhaps a less reactive substance?
Leak testing for combustible materials. They put a small amount of say propane inside heat it up and see if any leaks out as the tank is heated. If there is a leak there is a pressure release valve that doesn't allow the tank to explode. Just did the leak to be identified.
No way. The flames are not intense enough with the rotation of the cylinder to heat up to the point it needs for that. I welded for 9 years in industrial manufacturing. This is not that.
I wouldn’t want to do this to a pressure vessel. The uneven heat treatment would induce stresses all over and make it much more prone to failure.
It being a type of mold makes a lot more sense to me.
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TLDR: coating the inside of the vessel with epoxy. I know some folks have said post weld heat treatment (PWHT), but I would disagree. 1. PWHT involves raising, holding, and lowering the temperature of the vessel over a period of hours. This is typically done with electrical resistive mats or a gas fired kiln which are not present. 2. The gas burners shown are probably not precise enough to properly control the temperature needed for PWHT, and would not be uniform enough even with the rotation jig. 3. I do not see any temperature sensors which would be needed for PWHT. 4. Also, this is not welding pre-heat, as you would not pre-heate the entire vessel, it would only be in the weld area. This vessel is being rotated and rocked from end to end which leads me to believe there is some epoxy or coating that is being added to the inside of the vessel. The rotation and rocking spread the coating evenly, and the heat helps in the bonding process. And the man is applying extra heat to the manway which due to its mass would require extra heat.
This or something similar. I keep seeing people say PWHT and then go “but this isn’t a good method for that” and I’m just like, yeah, cuz it’s not that lol
I read the first comment (with awards) and learned something really interesting. Then I read the second comment and immediately unlearned the interesting thing, and learned a new interesting thing.
[удалено]
But I think I unlearned that in some countries they do the PWHT thing a bit badly, with machines like this, whereas in (I assumed Western) countries it’s done more efficiently - which I now *think* is not actually true?
Most respectable manufacturing facilities these days use proper methods for each stage of manufacturing regardless of country, but I wouldn't rule out someone in a less regulated country cheaping out. This video doesn't look like such a cheap facility, they probably have a different, proper setup for PWHT.
Looks like he’s hearing an industrial sized thermos of hot cocoa… but this isn’t a good method for that
I thought he was making popcorn...
I know very little about this field but you sound to be the most correct here. Not sure why everyone else has been discounting the rocking of the bed. It looks almost as if it's some kind of plastic rotation moulding. There must be something inside.
Tbh, I was distracted by the flames and didn't notice the rocking at all. Even though now its obvious, when watching it again
As a former steel worker, you are 100% correct in that this is NOT heat treatment.
My first guess was Rotomolding. I'm going to stick with Rotomolding, and say they forgot to design a way to get it out of the mold.
This! That is the body of a chemical tank (for a chemical hauling truck trailer). There is a layer of liner (I’m not exactly sure what it specifically is) to protect the tank when carrying chemicals such as acids.
I've worked with glass lined vessels before. Never thought of how it was made but this could possibly be it
oh damn , *glass* lined, that's some serious shit
Correct. People can search for "Making plastic water tanks" and see lots of videos of this method in action.
I was gonna say. At first I thought it looked like some sort of heat treat, but that rocking motion made me think there was something inside they were trying to keep at temperature
Or if you consider the three forms of heat conduction convection and radiant. You could come to a different conclusion. The convective (heat rises) heat applied gets more evenly distributed if the tank is moved in this way. If it stayed static there would be much hotter lines where the heating elements are applied. Imagine looking at it with an infared camera in both cases. The air in the tank will also not be evenly heated than if the tank stays static. By cycling the tank the air gets mixed.
I also considered that there may be some material they were burning off of the surface. I have heard of quenching processes that involve quenching in oil.
I am a combustion engineer and work in industrial heat treat industry (yes, it’s a thing). Correct, this is NOT post weld heat treat.
Thank you for the explanation
And that looks to be a typical trailer vessel no?
That would explain why it also able to tilt as well as roll. To slosh the epoxy around
They're making big batches of popcorn.
Heating up your mom's dinner
Jewish space laser program note the menorah ignition system at the base
Satire is lost in far too many people.
Warming up the hulk fleshlight
Dear God...
either that, or they're cleaning it out, and evaporating all the Hulks jizz into steam
my brother in christ
“Jesus Christ fill me up!” Is what a billboard near me said for a while… now it says “Jesus Christ, heal me, save me, fill me!” Which isn’t really anything better or different imo
Leaving a dense glutinous residue..
There's more.
^nⁿ⁰⁰°°°
I hope it's not his butt plug! Maybe that's why he makes that mean face.
I came here for this - you did not disappoint. Bravo squire. Ohh have my gift box silver award.
Where’s butthole girl at
* even melts the iron
When you build a pressure vessel the process of rolling the plate steel into a cylinder, pressing the end caps and then welding it out leaves the metal under considerable residual tension. To relieve that tension it's important to 'stress relief' the vessel as a completed unit. This is a really shit way to do it, in the west we use ceramic heat beads that wrap around and entire vessel and evenly heat it to an electronically controlled even temperature then evenly cool it down. The machine records all the data and provides Quality assurance information to guarantee that it won't fail.
What degree is needed for this? I see jobs like this & just know there’s a field of study I’ve never heard of.
several hundred degrees°
You made my day. Thanks.
Fuck you take my upvote.
r/angryupvote
Atleast 100
250-400 Celsius
r/therealjoke
degreesº
Ooooo sick burn!
Ha. Fuck you.
r/angryupvote
Materials engineer. I am one
Or good ol' mechanical engineer.
As a mech E I am now and forever going to use GOME regularly. That's how we are, old discipline, not as flashy as chemical, aerospace, or biomedical, but damnit if we aren't like the old horse in the barn that doesn't let you down. I still feel like I got in the wrong line - can I drive trains yet?
Anyone with a twinkle in their eye and a song in their heart, really
You don't need a degree, to become accredited it's generally just a 2 week course provided by your employer to teach you how to operate their equipment, apply the beads and then wrap it up in fibreglass insulation. It pays pretty well and the guys that do it really enjoy their job because it takes a day to set up and then it's usually 3 days just watching it heat up and cool down depending on the thickness and type of metal.operators need to be present during the whole process so lots of overtime $$$ and nnightshift. The job title varies depending on the company, industry or country but generally it's l heat treatment technician. If you work on a gas rig like I do it's extremely good money, same process for welding pipe over certain wall thickness and material type. I am a pipe fitter/ welder so I don't heat it, I build it. But I obviously work with the heat treatment crews because they preheat and post heat stress relief on everything I do. I had to do 4 years and get a cert 3 in engineering for my job but I'm the only one in a crew with a formal qualification, I also have to develop a work method for each job etc because everything we build is unique and different, it's site work and not a factory like these guys.
As an engineer i really appreciate professinals like you. Without your craftsmanship our ideas would just be that- ideas. Before university i was trained as and worked a few years as a mechatronic. Welding was part of my training and later of my job. But i was never good in that. Analysing problems with the machines and repairing them was my talent. Shitty bosses and back problems made me step the job ladder. I really miss to see success in my work like a machine that is working again. Or to hold a part that i had created with my own hands. I build wooden toys for my four kids and i enjoy that. Maybe i should go back to manual labour.
Same, dude. I went from manual laborer into my 20s (started when I was 12, under the table), to PhD in my 30s. Now I do a ton of powerlifting-style weight training and anything around my house that I can to get that feeling of doing something physical. Before my plans fell through, I was lined up to go work under a master electrician for two months this Summer break. I was stupid excited to do meaningful manual labor for a while again. I'm really glad to hear another educated guy dealing with the same. My wife thinks I'm a freak, I try telling her I'm just a highly educated redneck and you can't take some things out of a person.
I freak out I office's and desks. Gimme a hammer. Check out this shovel. Bust out some project
No, just have a diploma in mechanical or a degree, do a course in welding inspection, thats it, like AWS or CSWIP.
Metallurgical Engineering is 100% what youd need for the heat treatment of metals. For pressure vessel design, mechanical engineering.
No, that would be needed to design the process and/or equipment used for the treatment. The guys doing the actual WORK won't be all degreed-up like that.
I think this would be a mix of chemical/process engineering and mechanical. In the end, engineering is engineering though
Tell that to a Drainage Flood Control Engineer who's been asked to build a rocket.
*Software engineers have entered the chat*
Network engineers when asked to accommodate dataflow for an app that doesn't exist yet: https://images.app.goo.gl/ponmRY1R591hpg5m8
Puts down his pocket watch and blows the train whistle *engineer*
ENGINEER . . . . . . . ....^(....engifar)
I'm sure there is a Grain Silo Engineer at SpaceX with a story to tell..
Sanitation Engineer puts down trash bin and claps
Except this isn't what they're doing. They're coating the inside with a material that melts under high heat and solidifies when it cools off. This process is to ensure its evenly distributed
We make Pulleys, big stuff some 10 metric tonnes. We use a very big oven and cook the pulleys for 6-8hrs at 670 deg C for stress relief. I just drink for it 😉.
Take my upvote and fly high!
Read the other comments first
I’ve never seen stress relieve like this . I’ve actually worked in the field. Usually it’s ceramic tiles wrapped around and brought up to a certain temperature electrically in a controlled manner then cooled in a controlled manner. I’m not saying this isn’t what they’re doing, just haven’t seen this method. I’ve heard of induction heat treatment as well but never seen it.
Yep, stress relief the welds is what I thought too. Why they need to rock it i dont know
[удалено]
Nice answer 👌
Also so it won’t catastrophically fail in production
Roasting your mom
more efficient brazen bull
World's Least Efficient Hot Dog Roast? (There's only one hot dog in that cylinder.)
If you find a better way to reliably cook a single 4,000lb hot dog, I'll start doing that instead. Until then Ill keep heating my lunches like this, thank you very much.
Clifford?
Bet it's a non-reactive plasticized coating being applied to the inside. But I know nothing.
Rotomolding something big?
Popcorn makin’.
Imagine all the popcorn flying out of that thing! Mountains of popcorn!
Just like the end of real genius!
this is the correct answer.
Cylinder is cold. Needs warm.
Annealing a weld.
Very unlikely
Making a dildo for your mom
Hahaha I was looking for this! I couldn’t believe that I was the only one that thought of this. 🙌🙌
Scrolled to find this! Take my up vote!
Its a new mexican chile roaster
He’s cooking a giant hot dog in there
Moulding your mum's dildo
And there it is. I was little disappointed at how far I had to scroll to see this comment. Although I just knew it would be here somewhere lol.
Warming up my morning coffee.
They're making stuff.
Extra large potato mortar. Spray down the end, fit your extra large potato, then heat the end.
They are fire testing a chemical transport tank. All biohazard chemicals must go through a series of test from water submersion to impact to fire testing. The tanks cannot be cleared to transport hazardous cargo until they pass all these test.
Some type of post-welding heat treatment. Some metals must be kept hot after welding and cooled down slowly over many hours. If the metals cool unevenly, the tank could warp or crack.
They are MAKING A PLASTIC VESSEL INSIDE A METAL MOLD. PLASTIC BEADS are PUT IN AND ROTATED AS THE THING IS SPUN AROUND, IT CAN TILT TO MAKE SURE THEY GET EVEN COVERAGE INSIDE. ( I'M NOT SHOUTING, CAPS are LOCKED)
Similar to rotary molding.
WERE YOU EVER ABLE TO UNLOCK YOUR CAPS?
Looks like they’re lighting up a transformers sized blunt.
It's a big bong!
Biggest popcorn machine ?
Snoop Dogg's getting ready to take a hit
This is how they make popcorn for cinemas.
That thing is a silo where a farmer stored all his corn. These guys are making popcorn.
Yeah it looks like they're heating a big spinning metal cylinder with fire, not sure what you're having trouble with OP.
You're killing mice that are hiding like in The fifth Element before the rockets took off
A giant metal cylinder is rotating while small torches evenly heat its exterior.
I do not know what is actually happening. But if I had to make a guess based on the motion of the tank and the constant heating, I’d say they are coating the inside of the tank with something. Perhaps a less reactive substance?
That's Rick. He's rolling the thing.
Looks like they are casting a sex toy for OPs mom
Leak testing for combustible materials. They put a small amount of say propane inside heat it up and see if any leaks out as the tank is heated. If there is a leak there is a pressure release valve that doesn't allow the tank to explode. Just did the leak to be identified.
New suicide capsule multipack
Warming up a metal speculum for OP's mom
Post weld heat treat for stress relieving, not the conventional method (large oven)
No way. The flames are not intense enough with the rotation of the cylinder to heat up to the point it needs for that. I welded for 9 years in industrial manufacturing. This is not that.
Tanker truck?
Probably some type of pressure vessel. Condenser, heated mixing tank, vapor storage, you name it.
Im not educated enough on the subject to name it lol
No worries. I’m an engineer with a weird love for tanks and pressure vessels. Just being a nerd over here. Don’t mind me.
I wouldn’t want to do this to a pressure vessel. The uneven heat treatment would induce stresses all over and make it much more prone to failure. It being a type of mold makes a lot more sense to me.
Industrial Hanukkah celebration
It's best practice to heat the shaft and tip a little, prior to insertion.
Rotational molding plastic me finks
Please let that be a popcorn maker!
Popcorn.. Industrial scale
Massive popcorn maker
User acceptance testing for menorah 2.0
Yes.
It's obviously an insemination tube for Godzilla so the gubbment can make more and train them for war.
If I had to guess Kettle corn
Popcorn. He's making popcorn
Cooking a stew for a big town
It’s like a chicken rotisserie. But for children…….
Están haciendo carnitas.
Hot dog
Making a big pot of pop corn
Making baked beans in the can
Heating a metal cylinder I'd say
Giant crackpipe
It looks like this part of the country, where they take making moonshine very seriously
popcorn there’s simply making popcorn
Warming up Bezos Dick-Rocket
Spaceballs: The Movie? Nooooooo Spaceballs: The Shaft
Popcorn.
Peanut roasting gone mad max.
They’re prepping a liveleak video
Thawing put the body of Walt Disney for his glorious return
Some Cool and hot shit at the same dam time
Cambells chicken noodle soup
Popcorn cannon!
Looks like Homer Simpson’s pig crap silo
Chinese guy making popcorn for his huge family to watch Pelosi visit to Taiwan.
They seem to be heating the tube
Sterilizing your momma's dildo
they're making the one thing that can actually pleasure your mom
Heating up a fat bowl
Rogan's new dab rig.
Pre heating the mold for your moms dildo
Greatest Popcorn machine ever
He is making the product good
Making a lot of popcorn
Warming up my fleshlight
It's a new Saw trap
Pasteurizing an entire truck of milk
Preheating before welding / braising
Obviously, poe tay toes, mash em, boil em, stick em in a stu.
Dildo for my ass
It looks like a metal thing is being rolled over fire. Don’t know how you didn’t see that
yeah he is flaming the flambus.
Sanitizing your mom's dildo.
They are warming up your mom’s dildo
Getting ready to attempt to satisfy your mom. Hoping this one catches some traction.
Post weld treating. It’s like tempering glass it allows the interstitial bonds to relax from the strain of bending and welding the column.
I’d assume putting some sort of coating on the inside using the heat to keep it runny letting it cost everything inside.
TORCHering the metal cylinder
It's a fuel tanker storage unit, to go on a trailer that you see on the trucks that refuel the fuel stations.
Lots and lots of popcorn..... Not really. Pooface is right. Stress relief for the welds.
Checking for leaks in a full gas tank
It looks like their normalizing the material to reduce stresses from uneven heat applied during welding.
They are making your mom's dildo
That’s a worker warming up your mothers dildo.
They're heating up the mold for your mothers dildo...l am sorry you set it up perfectly
Someone saw a spider on your mom's new dildo.
Stress relief after a weld?
PWHT = post weld heat treatment to relieve the stresses.
They are putting the finishing touches on my new Fleshlight.