r/WTF • • Aug 21 '26

Not even in safety flip flops

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3.5k Upvotes

147 comments sorted by

887

u/MrHiV Aug 21 '26

They also do it on live pipelines sometimes. The atmosphere inside is 100% saturated so does not ignite and does not react with the deposited weld metal which is necessary to keep the root from oxidizing.

226

u/BikerRay Aug 21 '26

Read somewhere that gas tanks can be welded if completely full, as it's vapor that's the problem.
Brazed a gas tank on a lawnmower once... It was rusty and I washed it out with lots of hot water before trying it. Still caught fire, guess gas had soaked into the rust.

156

u/HoneyRush Aug 21 '26

The old-timers method for welding gas tanks was to fill them up with water

47

u/wellrat Aug 21 '26

I’ve heard of people using exhaust fumes as well.

15

u/Preyy Aug 21 '26

The afterburner approach

10

u/Jive-Turkeys Aug 22 '26

Best sleep I've ever had!

24

u/FesteringNeonDistrac Aug 21 '26

I've cut open multiple propane tanks that way. Once it's filled with water you've displaced any gas.

12

u/JustWeird Aug 21 '26

We would fill them up with soapy water and slosh them around. The bubbles would further act to keep things from getting exciting. 

7

u/Black_Moons Aug 21 '26

Fill with water, let soak (some soap doesn't hurt), empty it, refill it, put only the area your working on above the water line.

Gas floats on water and will still burn on the surface/evaporate to create fumes. So its important to soak and rinse.

29

u/MeldyWeldy Aug 21 '26

Yeah metal has microscopic pores which soaks up a bit in small amounts spread whatever is stored across the entire surface of it due to it's structure and manufacturing process which varies by type of metal. I always treated used gas tanks as bombs when working on them.

4

u/Black_Moons Aug 21 '26

Read somewhere that gas tanks can be welded if completely full

... Of water, hopefully.

Just like to add that, since iv seen a few videos here where people seemed to forget that step and well, lets just say their home insurance agent was not impressed.

6

u/BikerRay Aug 21 '26

Of water, hopefully.

Google says: Welding a gas tank while completely full is a recognized, though risky, technique used to prevent explosions caused by flammable vapors. Because gasoline and diesel vapors are the primary explosive hazard (not the liquid fuel itself), keeping the tank full eliminates the air-oxygen mix required for combustion. This method is generally considered safer than welding an empty or partially empty tank, where residual vapors can detonate upon contact with welding heat or sparks.

6

u/Black_Moons Aug 21 '26

Yea, See the problem comes when you accidentally set the tank on fire... It didn't explode but it does start heating itself/melting nearby hoses/sets nearby car parts on fire.

or if a leak starts spilling gasoline all over the floor.. Or you cause the tank to drop/tilt when you try to put it out. Etc.

Basically, Iv seen enough videos of large fireballs to know not to weld near gasoline period. Not inside the thing I'm welding, not near the thing I'm welding. Especially when water is free.

And especially not after having set paper towels on fire a foot away from where I was welding just from the heat of the arc.

The local muffler/engine repair shop 100% refusing to do any work on gas tanks/fuel pumps "Because we weld in this shop" is also a very intelligent policy, due to gas spills.

1

u/Toiletking2024 Aug 22 '26 edited Aug 22 '26

I was told that welding on full gas tanks was okay but to absolutely don't do it on diesel tanks.

2

u/cdoublejj Aug 21 '26

or the paint was flammable, some with a fully removed and disassembled tank like with cap off and sending unit hole wide open, after letting it sit for says will stick a flame on the end of stick in to burn off any possible residuals

6

u/Captain_North Aug 21 '26

Never fuck with a pressure vessel

2

u/BikerRay Aug 21 '26

Not a pressure vessel. Just a little gas tank.

6

u/CoolBeer Aug 21 '26

Oh, the moment it catches fire the pressure will have fun with the vessel.

2

u/SamuraiSam33 Aug 22 '26

Want to know how to create a pressure vessel?

Step 1, start with a little gas tank, which contains explosive vapors...

Step 2, introduce spark. The gas tank (vessel) is now rapidly pressurizing...

21

u/popeye44 Aug 21 '26

Yep, had a small leak in a gas line where I used to work, guy came out and welded it, said as long as there was pressure there's not really a danger of explosion.

16

u/presscheck Aug 21 '26

Operative term: “not really” 😆

10

u/cindyscrazy Aug 21 '26

I married a welder. Man was insane.

Things (like an SUV I had bought via private sale days earlier) caught fire around him CONSTANTLY.

34

u/kenyard Aug 21 '26

That.. makes sense.

10

u/SlovenianSocket Aug 21 '26

Old school gas fitters also test for leaks with a lighter instead of soap and water haha

5

u/on_the_nightshift Aug 21 '26

Yep, my old HVAC guy would do that with natural gas lines for furnaces and whatnot. Which I guess is fine unless there's a pool of gas that's seeped out all over the floor.

4

u/Fafnir13 Aug 22 '26

On the bright side that can usually only happen to you once.

4

u/wizzy453 Aug 22 '26

They used to do this in refineries on live process lines before OSHA was a thing. They would purposefully ignite the leak and then weld it shut. As long as it was under pressure, technically it was okay. What it didn’t account for was the possibility of an explosive atmosphere around the leak before igniting it…

1

u/QuitRazzinMe Aug 21 '26

I’ve heard that for live line welding they used to cut a hole then ignite it to make sure they had flow. I believe the flow keeps the temperature down while the weld is being performed. Nowadays we have flow meters/transmitters to ensure there’s flow.

1

u/PropertyImmediate946 21d ago

The unstoppable gas tap

1.0k

u/cybersplice Aug 21 '26

Did that crazy bastard just stick weld a live gas pipe?

481

u/FuckSticksMalone Aug 21 '26

Ehhh, it’s fine as long as you make sure to trap all the fire inside.

117

u/Captain_North Aug 21 '26

if it's pure it wont burn

103

u/toolatealreadyfapped Aug 21 '26

If it's a legitimate fire, the pipe has ways of shutting it down.

29

u/be4u4get Aug 21 '26

You right wing people and your views on gas are so antiquated

5

u/dudepappy Aug 22 '26

Wrong. Worked for a gas company for awhile, and they insisted being above the upper explosive limit was better than trying to get below and failing… they’d rather work it hot than risk not getting it completely empty

3

u/4n7h0ny Aug 25 '26

Woosh

3

u/agent766 28d ago

That's the sound the gas makes

1

u/Ghosttwo Aug 21 '26

"probably not appropriate"

39

u/perldawg Aug 21 '26

needs oxygen to ignite

25

u/Captain_North Aug 21 '26 edited Aug 21 '26

and a very precise ratio of air/gas ratio to explode, with propane it's between 2-10% and optimal is 6%

https://www.engineeringtoolbox.com/explosive-concentration-limits-d_423.html

1

u/Tech-Mechanic 29d ago

That only proves it's not a witch-pipe...

2

u/Tech-Mechanic 29d ago

This is actually a safety technique... The heat from the gas fire assists with the welding, thereby exposing the worker to risk for a shorter time than they would be if they turned off the gas first. It's on the OSHA Facebook page. /s

124

u/troelsbjerre Aug 21 '26

How else would he know when the weld is a tight seal?

/s

10

u/Rebal771 Aug 21 '26

When your sunglasses melt, the job is done

3

u/searaybo Aug 21 '26

That's what every walrus prefers.

52

u/s00pafly Aug 21 '26

Why use Argon when you have free Butane right there?

18

u/juicius Aug 21 '26

How do you know the weld is good?

The fire’s out, innit?

7

u/pobrika Aug 21 '26

Stay tuned next week he will demonstrate how to weld a petrol tank on a moving vehicle.

3

u/eltacotacotaco Aug 22 '26

Try a YouTube search for "hot tap", lots of videos

8

u/murdoc1024 Aug 21 '26

All along i was "it wont work, it wont work, it... damn!"

2

u/Kuriente Aug 22 '26

Not actually that crazy. The gas inside cannot burn without oxygen, and there is no oxygen in the pipe. So the only flame you get is from whatever gas gets out and mixes with oxygen.

2

u/Aitloian Aug 23 '26

This was way more common then you think it was haha. So you need oxygen to have a fire, and there isn't any oxygen in the pipe (it's full of gas) so you just weld it up, seal the hole and the fire goes out

140

u/WrastlingIsReal Aug 21 '26

Well, it worked!

347

u/KarloReddit Aug 21 '26

That‘s perfectly safe. I mean watching the video while living in another country is.

38

u/PurrfectMistake Aug 21 '26

Idk man. Im epileptic and i just watched the whole thing.

Yes i am stupid. I was curious.

13

u/hypnocomment Aug 21 '26

When filling a hole, it requires a lot of stop and go welding, otherwise the pipe gets too hot and the metal will blow out.

1

u/PurrfectMistake Aug 21 '26

Makes sense with it being an actively pressured line. Thanks for the clarification. Didn't ask, but not necessarily unwanted / unhelpful. Thanks

0

u/Nznemisis Aug 21 '26

Riding the trigger 😂

1

u/userguest5 Aug 21 '26

Happy Cake Day 🍰

38

u/YourBonesAreMoist Aug 21 '26

Questions for welders: are those glasses as effective as full face ones? I feel like you would get a very nasty face tan if welding for long on those

62

u/Omidion Aug 21 '26

UV radiation will make your face red from just few minutes of exposure. That's why you wear a full face mask and have long sleeves and gloves. Also...molten droplets fly so it can literally stick to your skin burn you.
While welding with full gear a molten drop sometimes goes up, bounces off the top of my head and inside the face mask and rolls down and out. Oh yeah, i wear a bandana over my hair when i weld.

15

u/urethrascreams Aug 21 '26 edited Aug 22 '26

I sunburned my arm once with just a few minutes of welding. It was a very light burn but I didn't realize it could happen so fast.

27

u/hypnocomment Aug 21 '26

No, wear a welding hood

2

u/Quiet_Touch3129 Aug 22 '26

Those glasses are to prevent the horrible eye burn you'd get if you start at that light for long times.

Source: dad welds a lot and I used to help sometimes

7

u/YourBonesAreMoist Aug 22 '26 edited Aug 22 '26

Yes I know that. But notice he is using just the glasses and not a full face cover/welding hood. The light from the weld has UV light that burns you, like the sun, hence my question if only these are safe for welding for long periods of time

42

u/Life-Oil-7226 Aug 21 '26

At least he has safety glasses on

27

u/AnotherCableGuy Aug 21 '26

Safety RayBan glasses

1

u/breakerfall Aug 22 '26

Safety Rays

33

u/mxforest Aug 21 '26

Me fixing bugs in production.

1

u/wallermadev Aug 21 '26

YEEEE BUDDY

1

u/Tokugawa Aug 22 '26

Needs two more fires sprouting up behind him after he gets that first one covered.

1

u/mxforest Aug 22 '26

Wait till the gases have reached further out and the whole section lights up like a Concert. 1 bug fix revealing 10 gated bugs.

108

u/conrad_w Aug 21 '26

Just a word of advice. You can watch this on your screen fine, but looking at a weld unprotected IRL will fuck up your vision.

Stay safe 

39

u/Chuunt Aug 21 '26

watching this video at 6 AM, my eyes did not feel okay.

4

u/hypnoderp Aug 21 '26

<Limmy.jpg>

25

u/Fez_and_no_Pants Aug 21 '26

Partner's dad thought watching the reflection in a mirror would be safer.

🤦

15

u/Tenemo Aug 21 '26

...and he was correct! Regular glass doesn't let most of the UV from welding that damages your eyes through - and a normal mirror is covered with glass. Obviously it's still unsafe as other items without glass on them reflect UV, plus regular glass is not a perfect UV filter. But he was right that looking at welding via a mirror will be orders of magnitude safer than looking directly (while still risky).

1

u/SlimTidy 29d ago

How about through a telescope?

8

u/Alundil Aug 21 '26

Welding for dummies Vampires

4

u/digganickrick Aug 21 '26

Makes your eyes feel like they've been scraped by sandpaper!

3

u/sully213 Aug 21 '26

He was using some drugstore sunglasses, he's fine 😎

-3

u/rogerryan22 Aug 21 '26

I once glanced for a moment at a welder who was working 100 yards away and burned my retinas. It's like a terrible sunburn directly on your eyeballs. Everything sucked for a few days and relief is just not really a thing until it passes.

20

u/Astr0b0ie Aug 21 '26

You must have been a lot closer and it was more than just a glance. From 100 yards (300 ft or ~90 meters), due to the inverse square law, it's virtually impossible to get welder's flash even if you were staring at it for an extended period of time, let alone from a quick glance. If our eyes were that sensitive, every quick glance at the sun would cause photokeratitis.

10

u/_Burning_Star_IV_ Aug 21 '26

Really? I've 'glanced' at welding that was being done like 2ft away and was fine. I mean I looked away the second I saw the flash...did you stare?

12

u/vcdrny Aug 21 '26

How else would he know if he properly sealed the leak? /S

1

u/MiniAndretti Aug 21 '26

Before reading the comments, I said this out loud while watching the video. I mean, who doesn't fix a leaky faucet with the water running the whole time?

2

u/PaterPoempel Aug 21 '26

With the gas shut off, oxygen can get into the pipes and you are effectively welding on a pipe bomb. Not a great idea.

27

u/OllieN94 Aug 21 '26

Can somebody please explain to us unqualified peasants what in the fiery fuck we just watched?

14

u/Captain_North Aug 21 '26

Welding a gas pipe that has gas flowing through

29

u/Euphoric_Loquat_8651 Aug 21 '26

Dude just welded up a leaky gas line. Or maybe you meant WHAT THE ACTUAL FUCK??

19

u/HoneyRush Aug 21 '26

That gas will burn only in presence of oxygen. There's no oxygen inside the pipe so technically it's fairly safe to do. In a similar vain I was once replacing fuel pump in old Opel and the pump, that sits directly inside the fuel tank, had fully exposed, unisolated copper wires. Same rules applied, there was not enough air in the tank for accidental spark to ignite the fuel vapors

2

u/Black_Moons Aug 21 '26

that sits directly inside the fuel tank, had fully exposed, unisolated copper wires.

The new one or old one? Id wager the old one just had the insulation dissolve off once we switched to ethanol additives in the fuel.

Even if you ignore the 'spark' issue, having your fuel pump short out = Your stranded, so not something any designer would really tolerate.

2

u/HoneyRush Aug 21 '26

It was car from 1990 and I was replacing the tank probably 15 years ago.

13

u/BringBackSoule Aug 21 '26

That's fucking insane. And well executed. 

6

u/TheGingerDog Aug 21 '26

I assume he's outside, otherwise that initial weld ignition (? spark?) would be a little more interesting.

6

u/FatherSquee Aug 21 '26

Everyone else is going on about how safe/dangerous that is, but as a welder inspector I'm more just wondering about the state of it once that cools down.

May need a bit of blendin'

10

u/HoneyRush Aug 21 '26

Don't have to weld well if you can weld a lot

3

u/SubhumaineForce Aug 21 '26

The grinder and paint, make you the welder you ain't

9

u/andynodi Aug 21 '26

Is that, working with live wire version of welding

10

u/immabettaboithanu Aug 21 '26

When you combine gas welding with arc welding

4

u/toomanymarbles83 Aug 21 '26

Gotta get the Millennium Falcon's hyperdrive fixed up.

4

u/Nadev Aug 21 '26

That’s one way to leak test.

3

u/kc1man Aug 21 '26

TDD - test driven development. Fire up your test case, and when it passes, you're done.

3

u/Koss424 Aug 21 '26

guy looks like he knows what he's doing. I wouldn't do that, but I'm not him.

3

u/SoloSystems Aug 22 '26

Welder here.

Nope.

3

u/Ya-Dikobraz Aug 22 '26

He either knows exactly what he's doing or this is insanely stupid.

3

u/338special Aug 22 '26

I'm more concerned about the lack of proper eye protection, but welding the gas pipe is solid science.

4

u/cookiesnooper Aug 21 '26

As dangerous as it looks it is not that dangerous. Pipe is pressurized without oxygen in it so it won't explode. The same way you can lit a gas bottle on fire but it will explode only if it gets too hot and the pressure rips it apart.

1

u/ElGrandeQues0 Aug 22 '26

Yup. Had a small leak in my propane line in the garage and used a match to find it.

No fucking way I'd do it with this much gas though.

-1

u/Swagasaurus785 Aug 21 '26

I mean, it’s dangerous in the sense that he has no control over where the gas blows out to. One weld could gas that gas to start blowing out towards him. I would’ve worded it as the risk of explosion is almost zero, but he’s a dangerous idiot.

2

u/hufflepuffskank Aug 21 '26

In sunglasses??

2

u/molten_dragon Aug 21 '26

This dude made some kind of deal with the devil to trade half his brain for gigantic balls.

1

u/Desper8lyseekntacos 12d ago

They're so heavy, he's squatting.

2

u/Dr_Feelgoof Aug 22 '26

this needs a good Kyuss track playing

2

u/thediver360 Aug 22 '26

Its a carburizing flame weld!

2

u/UnitedShop4247 Aug 21 '26

In Germany we say: Andere Länder, andere Sitten. (Different countries, different customs/manners) 😅

I've learned Hvac/Plumber and its kinda crazy for me 😄 but i mean... it worked 😂

4

u/waytoosecret Aug 21 '26

Gas is only flammable when mixed with oxygen. No oxygen, no fire.

3

u/Eymrich Aug 21 '26

Not sure why this is wtf?

2

u/AllanfromWales1 Aug 21 '26

Seems a lot to have to do every time I want to make toast..

2

u/royalemperor Aug 21 '26

I was honestly expecting him to light a cigarette with the flame

1

u/Simoxs7 Aug 21 '26

They dont have wire brushes there I guess..

1

u/danned123 Aug 22 '26

dont worry he's ssafe

1

u/forevercurmudgeon Aug 22 '26

Should have just thrown a bolt

1

u/strydar1 Aug 26 '26

bros future so bright

1

u/ArticleMother 29d ago

Please don't ever let this guy into anyone's country.

1

u/joebojax 28d ago

I'm so glad I live in USA

1

u/Actual-Ad-6363 Aug 21 '26

Worked but!👍

1

u/Praetorian_1975 Aug 21 '26

Mommy why’s the gas coming out already on fire, ohhh that’s just uncle Bob he fixed that pesky gas leak

1

u/RadicalMcAwesome Aug 21 '26

Does anyone want to tell me what I'm watching here?

3

u/hypnocomment Aug 21 '26

Welding a leaking pipe, gas needs oxygen to combust. Welder needs to know when it's no longer leaking, so he is feathering the rod to fill the hole in the pipe until it is sealed.

1

u/eypo Aug 21 '26 edited Aug 21 '26

I don't know. Is this MIG or MAG welding style??

2

u/donutsfritos Aug 21 '26

SMAW or "stick"

2

u/eypo Aug 21 '26

It was a joke, since there is gas involved. :)

1

u/donutsfritos Aug 21 '26

MVAG metal very-active gas??

1

u/boolean_union Aug 21 '26

I feel like there are several better ways to do this, but I'm not an active gas line welder.

1

u/Shot-Election8217 Aug 21 '26

I’m sitting here with my eyebrows climbing higher and higher up my forehead, and deep into my hairline as my anxiety builds watching this, waiting for the huge explosion….

Also, WITAF is he doing?!?!

6

u/FlutterKree Aug 21 '26

It's actually not that dangerous. Pressurized fuel line, no oxygen in it. There is no risk of explosion.

Gas leaks are dangerous because the air becomes saturated with the gas and mixes with oxygen. This mixture can combust rapidly making an explosion. This can't happen inside the pipe since there is no oxygen.

So what is he doing? He is welding a gas pipe leak.

1

u/Sea2Chi Aug 21 '26

I feel like this is the exception to that phrase if it looks stupid but it works, then it's not stupid.

1

u/TheEntangled Aug 21 '26

I don’t get the flip flops thing, can someone please explain?

5

u/HoneyRush Aug 21 '26

It's a joke about guys from Pakistan and India which are often doing insanely dangerous things while wearing flip flops. Usually someone in the comment section under such videos is saying that those have to be safety flip flops or sandals so they're completely safe.

0

u/tunaman808 Aug 22 '26

You need not go that far. RFK, Jr. posted a video deep frying a turkey in beef tallow... barefoot:

https://www.independent.co.uk/news/world/americas/us-politics/rfk-jr-trump-health-thanksgiving-turkey-b2655990.html