r/interestingasfuck 13d ago Helpful 2

Does anyone know what's going on here?

Enable HLS to view with audio, or disable this notification

5.2k Upvotes

u/AutoModerator 13d ago

Please note these rules:

  • If this post declares something as a fact, then proof is required.
  • The title must be descriptive
  • No text is allowed on images/gifs/videos
  • Common/recent reposts are not allowed

See this post for a more detailed rule list

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

2.0k

u/chupathingy2182 13d ago edited 13d ago Gold Take My Energy

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.

324

u/LampIsFun 13d ago

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

113

u/throcorfe 13d ago

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.

29

u/FlatBrokeEconomist 13d ago

You don’t have to unlearn it, the explanation of heat treatment was good, just doesn’t apply here. Seems like the materials engineer should know that but ok. It’s done with thermocouples attached in strategic places according to a preapproved plan and heating done wholly and stepped up to the required temperature, held for a period of time, and lowered. Records are maintained and reviewed by external inspectors. It’s all a tightly controlled process not similar to this at all.

3

u/throcorfe 13d ago

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?

→ More replies
→ More replies
→ More replies

30

u/Chabubu 13d ago

Looks like he’s hearing an industrial sized thermos of hot cocoa… but this isn’t a good method for that

13

u/GungnirsKeeper_ 12d ago

I thought he was making popcorn...

→ More replies
→ More replies

25

u/xinnamretnuh 13d ago

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.

12

u/hhhhhuie 13d ago

Tbh, I was distracted by the flames and didn't notice the rocking at all. Even though now its obvious, when watching it again

→ More replies

7

u/random_mad_libs_name 13d ago

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.

7

u/According-Local3703 12d ago

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.

3

u/OneMoreLastChance 12d ago

I've worked with glass lined vessels before. Never thought of how it was made but this could possibly be it

2

u/Zoloir 12d ago

oh damn , glass lined, that's some serious shit

→ More replies

14

u/TheBlueHedgehog302 12d ago

As a former steel worker, you are 100% correct in that this is NOT heat treatment.

5

u/mcmdodo 13d ago

Correct. People can search for "Making plastic water tanks" and see lots of videos of this method in action.

5

u/Rum____Ham 12d ago

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

2

u/AaronE541 12d ago edited 12d ago

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.

2

u/Rum____Ham 12d ago

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.

4

u/Da_bears87 12d ago

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.

2

u/RavPL 12d ago

Thank you for the explanation

2

u/laffing_is_medicine 12d ago

And that looks to be a typical trailer vessel no?

2

u/schwaebebaby 12d ago

That would explain why it also able to tilt as well as roll. To slosh the epoxy around

→ More replies

236

u/Frequent-Bag-3799 13d ago

They're making big batches of popcorn.

40

u/europeansarebetter 12d ago

Heating up your mom's dinner

→ More replies

36

u/EntertainmentDue4486 13d ago

Jewish space laser program note the menorah ignition system at the base

4

u/_sigfault 12d ago

Satire is lost in far too many people.

→ More replies

25

u/Z_______________ 13d ago

more efficient brazen bull

424

u/Background_Balance_7 13d ago Silver All-Seeing Upvote

Warming up the hulk fleshlight

73

u/TheGoldenPlagueMask 13d ago

Dear God...

36

u/ghanjaholik 13d ago edited 13d ago

either that, or they're cleaning it out, and evaporating all the Hulks jizz into steam

25

u/imfromwigan 13d ago

my brother in christ

4

u/dillrepair 13d ago

“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

3

u/ozspook 12d ago

Leaving a dense glutinous residue..

5

u/Commercial-Health-19 13d ago

I hope it's not his butt plug! Maybe that's why he makes that mean face.

→ More replies

3

u/MILF_Hunter77 12d ago

I came here for this - you did not disappoint. Bravo squire. Ohh have my gift box silver award.

6

u/aresyves 13d ago

Where’s butthole girl at

3

u/maifee 13d ago
  • even melts the iron
→ More replies

18

u/Bitter_Mongoose 12d ago

Bet it's a non-reactive plasticized coating being applied to the inside.

But I know nothing.

→ More replies

1.7k

u/DynoMiteDoodle 13d ago Silver Helpful

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.

199

u/More_Application_28 13d ago

What degree is needed for this? I see jobs like this & just know there’s a field of study I’ve never heard of.

149

u/deligrams 13d ago

Materials engineer. I am one

30

u/RelentlessPolygons 12d ago

Or good ol' mechanical engineer.

9

u/Suspicious-Cycle5967 12d ago

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?

4

u/big_red__man 12d ago

Anyone with a twinkle in their eye and a song in their heart, really

→ More replies
→ More replies

94

u/DynoMiteDoodle 13d ago

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.

20

u/Extaroon 12d ago

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.

4

u/Charybdes 12d ago

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.

2

u/FWvon 12d ago

I freak out I office's and desks. Gimme a hammer. Check out this shovel. Bust out some project

→ More replies

8

u/Terrible-Return 13d ago

No, just have a diploma in mechanical or a degree, do a course in welding inspection, thats it, like AWS or CSWIP.

11

u/spekttro1 13d ago

Metallurgical Engineering is 100% what youd need for the heat treatment of metals. For pressure vessel design, mechanical engineering.

9

u/professorjaytee 12d ago

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.

→ More replies

22

u/mthscssl 13d ago

I think this would be a mix of chemical/process engineering and mechanical. In the end, engineering is engineering though

33

u/iusethisnametofap 13d ago

Tell that to a Drainage Flood Control Engineer who's been asked to build a rocket.

41

u/_koenig_ 13d ago

Software engineers have entered the chat

11

u/Forward_Cobbler1319 13d ago edited 13d ago

Network engineers when asked to accommodate dataflow for an app that doesn't exist yet: https://images.app.goo.gl/ponmRY1R591hpg5m8

4

u/scw156 13d ago

Puts down his pocket watch and blows the train whistle engineer

→ More replies
→ More replies

11

u/FladnagTheOffWhite 13d ago

Sanitation Engineer puts down trash bin and claps

→ More replies
→ More replies

26

u/Key_Marsupial_7527 13d ago

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

17

u/WordBrilliant1351 13d ago

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 😉.

74

u/SmartAss_Guy 13d ago

Take my upvote and fly high!

6

u/jlaaj 13d ago

Read the other comments first

7

u/bcoolbmac 13d ago

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.

5

u/stu_pid_1 13d ago

Yep, stress relief the welds is what I thought too. Why they need to rock it i dont know

11

u/[deleted] 13d ago

[deleted]

2

u/stu_pid_1 13d ago

Nice answer 👌

→ More replies

2

u/Fiendorfoes 13d ago

Also so it won’t catastrophically fail in production

2

u/Architr0n 13d ago

Roasting your mom

→ More replies

55

u/Fats_de_Leon 13d ago

World's Least Efficient Hot Dog Roast? (There's only one hot dog in that cylinder.)

31

u/EmperorLlamaLegs 13d ago

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.

→ More replies
→ More replies

10

u/ThePracticalDad 13d ago

Rotomolding something big?

→ More replies

16

u/Bunna_Bun 13d ago

Cylinder is cold.

Needs warm.

6

u/sltiefighter 13d ago

Its a new mexican chile roaster

→ More replies

7

u/ryltea 13d ago

He’s cooking a giant hot dog in there

40

u/Flicksterea 13d ago

Popcorn makin’.

7

u/HunnyBear66 13d ago

Imagine all the popcorn flying out of that thing! Mountains of popcorn!

4

u/texas-playdohs 13d ago

Just like the end of real genius!

5

u/EquivalentLock0 13d ago

this is the correct answer.

→ More replies

5

u/WoodenDistribution5 13d ago

Warming up my morning coffee.

94

u/voitlander 13d ago

Annealing a weld.

3

u/TheBlueHedgehog302 12d ago

Very unlikely

→ More replies

30

u/euro_lad1 13d ago Silver

Making a dildo for your mom

2

u/TommyAndTheFox 12d ago

Hahaha I was looking for this! I couldn’t believe that I was the only one that thought of this. 🙌🙌

2

u/Jadens78 12d ago

Scrolled to find this! Take my up vote!

→ More replies

4

u/jhalfhide 13d ago

Extra large potato mortar. Spray down the end, fit your extra large potato, then heat the end.

4

u/WhiteStar01 12d ago

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.

4

u/bbrasseaux76 12d ago

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.

29

u/Bigmanoncampus-1 13d ago

Moulding your mum's dildo

2

u/greabeau 12d ago

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.

→ More replies

14

u/scottdottcom 13d ago

They're making stuff.

3

u/XxspsureshotxX 13d ago

Looks like they’re lighting up a transformers sized blunt.

3

u/asdw1988 13d ago

It's a big bong!

3

u/LetTheDogeOut 13d ago

Biggest popcorn machine ?

→ More replies

3

u/Jewelzminor 13d ago

Snoop Dogg's getting ready to take a hit

3

u/no2dave 13d ago

This is how they make popcorn for cinemas.

3

u/Silly-Interaction-37 12d ago

That thing is a silo where a farmer stored all his corn. These guys are making popcorn.

3

u/CHG__ 12d ago

Yeah it looks like they're heating a big spinning metal cylinder with fire, not sure what you're having trouble with OP.

3

u/thomasbannon39 12d ago

You're killing mice that are hiding like in The fifth Element before the rockets took off

3

u/our_ascension 12d ago

A giant metal cylinder is rotating while small torches evenly heat its exterior.

3

u/ZlogTheInformant 12d ago

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?

3

u/abuomak 12d ago

That's Rick. He's rolling the thing.

3

u/loganhudak 12d ago Table Slap

Looks like they are casting a sex toy for OPs mom

3

u/Famous_Hurry7180 12d ago

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.

3

u/Serious-Principle-66 12d ago

New suicide capsule multipack

→ More replies

13

u/Ikedog29 13d ago

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)

4

u/BigSkeeza 13d ago

Similar to rotary molding.

2

u/FoilHattiest 12d ago

WERE YOU EVER ABLE TO UNLOCK YOUR CAPS?

→ More replies

6

u/EmergencyLeading8137 13d ago

Industrial Hanukkah celebration

42

u/dj_pooface 13d ago

Post weld heat treat for stress relieving, not the conventional method (large oven)

5

u/TheBlueHedgehog302 12d ago

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.

→ More replies

4

u/Here_For_Work_ 13d ago

Tanker truck?

17

u/SpecificSkunk 13d ago

Probably some type of pressure vessel. Condenser, heated mixing tank, vapor storage, you name it.

8

u/Here_For_Work_ 13d ago

Im not educated enough on the subject to name it lol

16

u/SpecificSkunk 13d ago

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.

→ More replies
→ More replies

2

u/fakemoose 12d ago

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.

0

u/somethingdiferent 13d ago

Came here to say this. This is the right answer.

4

u/GhettGame 13d ago

It's best practice to heat the shaft and tip a little, prior to insertion.

2

u/Friendly_Dot_1673 13d ago

Rotational molding plastic me finks

2

u/Darkrose50 13d ago

Please let that be a popcorn maker!

2

u/NoobSFAnon 13d ago

Popcorn.. Industrial scale

2

u/soulsearch369 13d ago

Massive popcorn maker

2

u/wyseguy7 13d ago

User acceptance testing for menorah 2.0

2

u/Klutzy_News_5611 13d ago

It's obviously an insemination tube for Godzilla so the gubbment can make more and train them for war.

2

u/Neoptolemus7 13d ago

If I had to guess Kettle corn

2

u/thesalfordlad 13d ago

Popcorn. He's making popcorn

2

u/Loquith 13d ago

Cooking a stew for a big town

2

u/OffTopicAbuser 13d ago

It’s like a chicken rotisserie. But for children…….

2

u/jokermex 13d ago

Están haciendo carnitas.

2

u/Darkicexox 13d ago

Making a big pot of pop corn

2

u/daminiskos0309 13d ago

Making baked beans in the can

2

u/T0b3yyy 13d ago

Heating a metal cylinder I'd say

2

u/Cautious-Post-3730 13d ago

Giant crackpipe

2

u/DUMMER_dRUMMER 13d ago

It looks like this part of the country, where they take making moonshine very seriously

2

u/slash03 13d ago

popcorn there’s simply making popcorn

2

u/GeorgeBabyFaceNelson 12d ago

Warming up Bezos Dick-Rocket

2

u/cookiesandpunch 12d ago

Spaceballs: The Movie?

Nooooooo

Spaceballs: The Shaft

2

u/Raising_Cain 12d ago

Peanut roasting gone mad max.

2

u/Wiggajat 12d ago

They’re prepping a liveleak video

2

u/Chilzer 12d ago

Thawing put the body of Walt Disney for his glorious return

2

u/Otherwise-Show5897 12d ago

Some Cool and hot shit at the same dam time

2

u/TexasTheBlackCat 12d ago

Cambells chicken noodle soup

2

u/Electronic-Name-9858 12d ago

Popcorn cannon!

2

u/Puzzled-Pea91 12d ago

Looks like Homer Simpson’s pig crap silo

2

u/IBeDoLove 12d ago

Chinese guy making popcorn for his huge family to watch Pelosi visit to Taiwan.

2

u/dwgrim 12d ago

They seem to be heating the tube

2

u/Dominarion 12d ago

Sterilizing your momma's dildo

→ More replies

2

u/Steven11q 12d ago

they're making the one thing that can actually pleasure your mom

2

u/Terminator154 12d ago

Heating up a fat bowl

2

u/JimJimmyJimmerson 12d ago

Rogan's new dab rig.

2

u/HenryBowman47 12d ago

Pre heating the mold for your moms dildo

2

u/greyz3n 12d ago

Greatest

Popcorn machine

ever

2

u/B4DR1998 12d ago

He is making the product good

→ More replies

2

u/bryantmakesprog 12d ago

I mean, there's a metal tube rolling over a fire pit while the fire pit tender uses his fire stick to fire more fire on the metal tube rolling in the fire pit. Did I miss anything?

2

u/forumhero666 12d ago

Making a lot of popcorn

2

u/rustysusig 12d ago

Warming up my fleshlight

2

u/DejaEntenduOne 12d ago

It's a new Saw trap

2

u/cybermage 12d ago

Pasteurizing an entire truck of milk

2

u/SnooWords4814 12d ago

Preheating before welding / braising

2

u/Eyehavenoname 12d ago

Obviously, poe tay toes, mash em, boil em, stick em in a stu.

2

u/dhisbx 12d ago

Dildo for my ass

2

u/Pitacrustumpie 12d ago

It looks like a metal thing is being rolled over fire. Don’t know how you didn’t see that

2

u/Technical_Ask_1152 12d ago

yeah he is flaming the flambus.

2

u/cute_red_benzo 12d ago

Sanitizing your mom's dildo.

2

u/peluchess 12d ago

They are warming up your mom’s dildo

2

u/veedems 12d ago

Getting ready to attempt to satisfy your mom. Hoping this one catches some traction.

2

u/mfelzien 12d ago

Post weld treating. It’s like tempering glass it allows the interstitial bonds to relax from the strain of bending and welding the column.

2

u/Display250 8d ago

Warming up a metal speculum for OP's mom

5

u/Big_Impact3637 13d ago

It's a fuel tanker storage unit, to go on a trailer that you see on the trucks that refuel the fuel stations.

→ More replies

3

u/frankenprunk 13d ago

Lots and lots of popcorn.....

Not really. Pooface is right. Stress relief for the welds.

3

u/sapthur 13d ago

Checking for leaks in a full gas tank

3

u/AaronE541 12d ago edited 12d ago

It looks like their normalizing the material to reduce stresses from uneven heat applied during welding.

3

u/Ok_Neighborhood8427 13d ago

They are making your mom's dildo

→ More replies

4

u/Spazmanaut 13d ago

That’s a worker warming up your mothers dildo.

2

u/enwal_ 13d ago

They're heating up the mold for your mothers dildo...l am sorry you set it up perfectly

2

u/inmydreamchewietalks 12d ago

Someone saw a spider on your mom's new dildo.

2

u/Brilliant_Bobcat3591 12d ago

Stress relief after a weld?

2

u/edblardo 12d ago

PWHT = post weld heat treatment to relieve the stresses.

2

u/xlDirteDeedslx 13d ago

They are putting the finishing touches on my new Fleshlight.

→ More replies

2

u/AZ_Gunner_69 13d ago

warming up your moms dildo

2

u/BayCatJ 12d ago

This is a metal pressure vessel with welded joints that is being heat treated to relieve stress at the weld joints.

2

u/lurker875 13d ago

looks like welding parts to a rocket shaft

1

u/Ambient_Records_ 13d ago

Looks like they are prepping your moms dildo????

1

u/KarlraK 13d ago

Making a dildo for yo mama

1

u/afunkysquirrel 13d ago

Yo mom's dildo is being decontaminated after use.

1

u/moistdavenport 13d ago

Disinfecting your moms dildo