Shock to the System

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CSB safety video detailing key lessons for preventing hydraulic shock in ammonia refrigeration systems based on the CSB's investigation into the accident at Millard Refrigerated Services Inc. on August 23, 2010. 32,000 pounds of anhydrous ammonia were released to the atmosphere, resulting in over thirty offsite workers being hospitalized - four in an intensive care unit.

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25 мар 2015

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Комментарии : 690

@MidwestSirenProductions 6 лет назад

Anyone else on a CSB mini-marathon?

@Maddoc74 5 лет назад

yup

@TheNumberOfTheBeast666 5 лет назад

Me too

@TheNumberOfTheBeast666 5 лет назад

It’s just so good

@hippityhoppityyourchildiso8803 5 лет назад

Midwest Siren Productions meeeeeeeeee

@daveb5041 5 лет назад

You people need to get jobs. Maybe as a plant safety manager.

@hwwwarrior90 6 лет назад

...I've learned so much about industrial accidents over the last couple days...I can't stop bingeing these and i dont quite know why

@02markcal 5 лет назад

It may save your life or someone close to you after sharing this valuable information.

@justinjolicoeur5965 5 лет назад

same

@RobinTheBot 5 лет назад

Its interesting to see all the little atrocities that get quietly ignored in media...

@matthewbracht940 5 лет назад

Me TOO! Fascinating. It helps that they are really well done.

@airplanemaniacgaming7877 4 года назад

@KombatBard those who dont know their history are doomed to repeat it. We know of it, so we can hopefully ensure nobody repeats it.

@magustx 5 лет назад

wow the animation of the guy typing on keyboard was fantastic

@Halberdin 5 лет назад

The display of details in this video is something between stunning and excessive. It's even possible to identify the hardware models, though they may not match the actual scene.

@mikuhatsunegoshujin 4 года назад

Then everyone wearing the yellow jumpsuit.

@Sashazur 4 года назад

Except he looks like he’s wearing a foam shirt

@evansuddreth388 4 года назад

Oh yikes I didn't realize that it is so good

@romeo_alpha0176 3 года назад

@@Sashazur 🤣🤣🤣🤣🤣

@amdg2023 5 лет назад

If only Congress was as thoroughly competent as this part of the government.

@samneal7679 3 года назад

We'd be typing this from Mars

@mrb152 3 года назад

To be fair, they may be far more competent at the great documentaries than actually doing the job.

@46bovine 3 года назад

Congress, we have a Congress? Who'd 'a thunk it?

@thomasbreig2292 3 года назад

Not to undermine what they do, obviously it takes a lot to investigate these accidents but in the end all they do is point their finger at someone and move on to the next accident. They are not a regulating authority, all they do is investigate, point fingers and recommend changes.

@barneyrubble4293 3 года назад

BBBUT MAH REGULATORY FREEDUMBS

@GeneralChangOfDanang 4 года назад

These videos make me think back on my teenage years in contract security. At any site you were assigned to, there was NEVER training. I was once assigned to a cheese factory to watch it on the weekends. I've seen the ammonia tanks and cooling system outside and never thought anything of it. There was no training on what to do during an ammonia leak, or even a mention that it was a dangerous event. On top of that, the guard on the shift before me would never tell me anything. I came in on a Sunday night and he left like normal, then I luckily got a call from maintenance that there had in fact been a small ammonia leak in the plant and that I should not start my rounds for another 4 hours. Yeah, that guy was useless.

@h8GW 2 года назад

It's possible that he too, wasn't given a clue by his supervisor when he started, as a result of a chain of not-given-clues.

@johnm2056 2 года назад

I too worked security back in the day and we were never told of any issues on the different sites. One was a medical research lab with biohazard warning stickers everywhere. Creepy place indeed.

@josephdouglas6482 Год назад

Honest question, do you need training to know an ammonia leak is dangerous? I mean you might need training to be able to detect or fix it, but if you can or happen to see an ammonia tank or pipe leaking, do you not just immediately evacuate? Like the story said the gas released from this particular incident was a big white cloud that must have been visible, would you not immediately evacuate the surrounding area?

@GeneralChangOfDanang Год назад

@@josephdouglas6482 I was just out of high school. I had no idea ammonia was dangerous (blame the public school systems I guess.) And yes, you do need better training in these industrial facilities. Not everyone has worked around these things their whole life and understand the dangers.

@josephdouglas6482 Год назад

@GeneralChangOfDanang No that's totally fair, I mean in high school at best you might gloss over something about ammonia briefly, but yea you wouldn't have been properly informed or trained by high school. Sorry, I didn't mean to sound snarky, it's like in my brain I see something leaking from an area I know contains ammonia, I would just run away. But in a warehouse setting if you ran the wrong way you could be running towards where the ammonia is being blown or vented towards. Totally understandable when I think about it like that.

@drowsy_mouse8406 6 лет назад

I'm sorry but I laughed my ass off when he said at 3:45 that they were cleaning up the deep water horizon right next to this accident

@joemorley6157 5 лет назад

Seriously though. I wasn’t expecting a dramatic turn of events that would tie in another industrial disaster. Did they just say Deep Water Horizon? Yep. They sure did smh.

@3bydacreekside 5 лет назад

Yo' dawg, I heard you like cleaning up disasters. So I put a disaster in your disaster, so you can clean it up while you clean it up. :p

@joemorley6157 5 лет назад

Alabama Governor speaking to the press during Deepwater Horizon Disaster: “Here in Alabama our highly skilled professional disaster cleanup response teams are so efficient and ever ready to respond to any disaster including the ongoing Deepwater Horizon Catastrophe. Now if everyone would turn to your left you’ll see we rigged the Millard Plant for an explosion in three... two... BOOM! And there it is folks. Watch our disaster response unit fix the Millard Plant explosion and then swim the 400 miles out to the Deepwater Horizon Spill. as you can see from their expressions they had no idea we were going to pull the plug on the Millard Plant today but here in our sweet home of Alabama we can handle just about anything and everything all at once. I’ll now take questions from the members of the press as we hand out gas masks to everyone”.

@orangejoe204 5 лет назад

And then on the way to the hospital, one of the wheels of the ambulance fell off and killed everybody because the lug nuts were improperly maintained. Nah, not really, but seriously, get your shit together Louisiana. I realize you're both the armpit and the fuel pump of America, but jeez, at least PRETEND you care when industrial disasters occur in your state. Down there, the regulatory attitude is literally "how many accidents per million in state tax revenue can we accept without the public throwing a fit?" The Gulf Coast (Texas and Florida too) politicians are terrified of offending the industrial companies because there's no other jobs for the locals to do, and the companies know it: they basically get whatever they want whenever they want it because they know the locals would lynch any politician who cost Daddy his oil refinery job. These are not "smart' people down there. They have the "company town" attitude of "Don't say anything or they'll take our jerbs and we'll have to go back on welfare".

@oydeekoi8271 5 лет назад

Crossover episode!

@En.GergerRacc 5 лет назад

"What is this, a crossover episode?" *Laugh Track*

@tylerknight99 4 года назад

**vomits from ammonia inhalation and slips in a pool of crude oil**

@samneal7679 3 года назад

hahahahahahahaha 10/10 post my dude 😂 I feel bad, but sometimes its either laugh or cry

@gunproofgrandad4381 3 года назад

I love the animation of all the guys in hard hats just pointlessly milling around whilst the gas cloud floats towards them.

@Ryarios 6 лет назад

This shows a good example of a poor control scheme. The system should be able to detect the hot condition and refuse to apply the low temperature fluid. A common problem is insufficient I/O, sensors and control elements to properly function through abnormal events.

@UltraGamma25 4 года назад

Or don't hire dumb people to work on HVAC systems without an HVAC license.

@samneal7679 3 года назад

This. It shouldn't even be physically possible to do something this catastrophic. This isn't a $10 PCB board for hobbyists, where if you forget to ground it or spill your drink its no biggie, just spend another $10. This is a system that can cause tens of millions in damages and untold human lives/misery. At least put 10 levels of permissions so that if you can do something, everyone from the assistant janitor to the CEO has to sign off. This should not be possible for one idiot to FUBAR.

@MrBlackHawk888 2 года назад

And possibly improper irregular situations management from control system software. I suppose, the "alarms" that were "cleared by operator", were of low informativeness, kind of "Warning: system online after power outage", providing no sufficient information for an operator and even any automatic control system to generate a proper instruction to address this warning.

@thermusaquaticusPCR Год назад

Why is the defrost cycle even categorized with alarms. Maybe it should trigger an alarm notification subsequent to it but the state change shouldn't be categorized with alarms.

@BradKwfc Год назад

The system also needed a way to absorb the shock.

@docmemory7626 9 лет назад

Very well made, very clear, thanks. On the need for passwords for manual overrides, I can't help but think of the several other CSB videos that say something like "operators had been given the password", "the supervisor entered the password", etc. If you don't have a hardwired interlock (like a temperature or pressure sensor on the coils interlocked to the valves) some fool will blow it up. Yes, you can bypass the hardwired interlocks, but with much more effort -- hopefully more effort than simply fixing the problem. Passwords are too easy.

@markarca6360 6 лет назад

Doc Memory What you mean is RBAC (role-based access control), frequently incorporated in information systems. All functions are clearly identified, and access levels are varied for every employee.

@MetalheadAndNerd 6 лет назад

As long as there is a way to override the safety measures by "authorized and trained personnel", this will also be done by some guy who cannot deny his bosses wish. I have seen the owner of a dry cleaner shop to use a screw driver to mechanically unlock the magnetic lock of a cleaning machine while the solvent was already in. For him it only was holding the breath for a few seconds while putting some more clothes in and saving an additional machine run. According to the certificate of the shop he is a trained professional.

@notsure1115 4 года назад

You are a100% correct. All interlocks should be hardwired. I've been an I/E Tech for 30 years and seen some dumb shit. Thers's always one or two idiot techs who will show operators how to jump interlocks thereby putting everyone's life in danger. To this day I've never jumped out interlocks for operators. It's cost me several jobs but I can sleep at night. Oh yeah I almost forgot nobody from lowly operator to plant manager would ever put in writing that they were asking me to jump out interlocks

@kilikus822 3 года назад

How did they manage to get rid of you?

@barneyrubble4293 3 года назад

Exactly, in the event of a disruption of service during the cycle it should auto clear and reset the lines. Don't give idiots the chance to bypass anything.

@StudioAREshorts 7 лет назад

>Avoid interrupting defrost cycles Seems more like "NEVER EVER"

@Cordman1221 8 лет назад

Talk about pure coincidence. It was pure (un)luck that people were gathered at the site not far from the ammonia burst. It was also pure luck no one died as a result of being exposed to anhydrous ammonia.

@ColliCub 4 года назад

Ah yes, ‘Manually Overriding the Alarm’ strikes again. 🚨

@thcoura 6 лет назад

Better than History Channel

@aspincelaframboise5300 5 лет назад

Yeah, no nazi crap or isisrael platitudes eh...

@Sashazur 3 года назад

Nearly anything is better than the Hitler- I mean History- Channel.

@mor4y 2 года назад

If you like the old history channel, when it was actually history rather than aliens and hilter still lives in Antarctica, check out Mark Felton Productions or Dr Mark Felton on here, he *used* to make history channel ww2 programmes back when the channel was good! 😉 he also does rather good free audiobooks on one channel

@hillaryclinton2415 4 года назад

all engineers and designers should be required to watch all of the CSB videos at least once per year. Get that 'think about it' on.

@daniellbondad6670 7 лет назад

The people who do know about hydraulic shocks,usually call them ''water hammer''.

@JulianFischerJulesBarner 6 лет назад

Daniell Bondad Never close a fire hydrant to quickly ;)

@joemorley6157 5 лет назад

Ah yes. If they just called it a water hammer I would’ve known what it was right away. Good call.👍

@johnnysunday402 5 лет назад

Steam hammer as well.

@steviebboy69 5 лет назад

I always wondered if you turn the tap(House water that is) on or off fast and get the Hammering or juddering in the pipe that it may be damaging it?

@willastle9623 5 лет назад

@@steviebboy69 Not a plumber or engineer but my guess would be 'probably no'; Most modern pipes would be substantial enough that the hydraulic shock behind the hammering noise wouldn't damage them, they'd just be too structurally sound. I guess low quality joints or valves may be but I guess in most houses they'd also be sturdy.

@theLuigiFan0007Productions 6 лет назад

I understand the person resetting all the controllers made a horrible mistake, but this problem would not have happened if the software wasn't flawed. The firmware on the controllers should NOT have allowed resetting any refrigeration system that was running a defrost, or at the bare minimum warned that 1 or more units were defrosting and would be reset after they finished. Secondarily, it should require more then one person to forcibly override anything, perhaps two or three keycards (wireless or mag stripe, the override MUST be stored in physical form). Third, the controllers should be designed to drain all the pipes, when switched on before powering on the refrigeration system, and this must be a non overrideable function. Last of all, the software should give CLEAR indications when procedures that shouldn't be interrupted are occurring, and refuse certain actions without multiple people approving it. Implementing these kinds of interlocks and safeguards should be quite obvious during the design state.

@sebastiannielsen 6 лет назад

What I understand from the video, the system didnt know its own state after a Power interruption, and that caused the system to resume the refrigeration despite the system actually being in the defrost state (just prior to the Power interruption), after the operator cleared the alarm/error. Draining the pipes when its unneccessary can also be dangerous in some situations. The person didn't override anything, but did clear an alarm, that had halted the system. I Think the best bet here would be, either to have the system to store its state in a non-volatile form at all times, so it can resume correct operations after a unexpected Power interruption, AND/OR have the computer systems/PLCs on battery backup, so it can remember its state for such as long time until its safe to restart the system regardless of prior state (eg when the "hot" ammonia have cooled down enough due to the Power interruption so it doesn't matter if the system is in refridgeration state or defrosting state)

@RobertMoser 5 лет назад

I like seeing that the systemic issues were acknowledged along with the operator error. People are going to make mistakes no matter what, and it is the job of the system designers to ensure that the ones with potentially deadly consequences, like this one, aren't easy to trigger by accident, while still allowing outside-of-normal-rules controls for the edge cases where those features are needed, too. It is difficult work!

@Astinsan 5 лет назад

Older systems are made with PLC. These logics are often flawed with regard to safety because of hasty decisions during the engineering process. They were new at the time. Before PLC systems were used everything was analog.

@Akcd11r2002 5 лет назад

@@sebastiannielsen I was thinking the same thing when I watched this... You hit the nail on the head. The human operator could have also been replaced by an " automated software reset" and this accident would still have occurred. There should have been a paper log printout of what tasks the system was doing at "x" time so that the human operator could reference and then make an educated guess on what the condition of the chillers was 8hrs after the power outage.

@justinlynch6691 5 лет назад

I couldn’t agree more. From autonomous cars to plane autopilot to industrial control software. Some individuals in the engineering world do not respect and acknowledge software as engineering. If you design these safety critical systems, you should need a stamp, period. Stamp on software, ass on the line. You’ll think twice before releasing it. Sure you can still be found liable, but knowing a jury of your peers is going to be going through this will make the world of difference. I’ll never understand why safety critical software gets away with no sign off. A bridge would never be built without a stamp. It’s insane.

@seanb9698 3 года назад

Whoever is in charge of the smoke and explosions in these videos is on a whole other level

@Milkman-bu9es 3 года назад

God, watching these fluid animations is astonishing. The way the liquid ammonia at the tip of the flow beads up as it evaporates is just amazing

@TheNumberOfTheBeast666 5 лет назад

These videos have such high production value and are just amazing. Nice score too

@kathywilliams5152 9 лет назад

Another excellent CSB video.

@jaguarfacedman1365 6 лет назад

Damn. This channel is good. Why didnt i find it sooner?

@unbrokenandalive1089 2 года назад

USCSB has rapidly become my favorite channel!! As someone who spent years working in contracted hazardous/non-hazardous Industrial cleanups - I have a strong relation to many of the settings and processes, along with the many potential hazards that silently loom just beneath the surface of these operations. Binge watching these well-made videos has become a dedicated part of my weekend routine. Thank you.

@skeetrix5577 Год назад

I know this is a old thread but can anyone with any experience with this kind of system tell me how exactly the system was running a defrost cycle while the electric was out? the video explains it as immediately after power was restored, the system was in the middle of a defrost when they tried to restart it but doesn't make sense how that happened if there is no power to heat the ammonia.

@performa9523 5 лет назад

Considering the number of refrigerated warehouses across the country running anhydrous ammonia refrigeration systems that are decades old, it surprises me there aren't way more accidents like this all over the place. Maybe there are, and this one was just really significant in terms of injuries. Spooky...

@49pdiep 7 лет назад

I can't get enough of these videos, well made and very informative.

@1cy3 8 лет назад

BAD SOFTWARE/EQUIPMENT DESIGN

@FerroequinologistofColorado 8 лет назад

Exactly

@theLuigiFan0007Productions 6 лет назад

Beyond bad. The software should have been configured to automatically drain all pipes before restarting refrigeration if it was reset, interrupted or powered on from a otherwise unknown state. It should also have been designed to refuse to reset units that were performing operations that should never be interrupted.

@KrK007 5 лет назад

Agreed. It's an engineering design flaw.

@Lauzana 9 лет назад

Another excellent and valuable CSB Safety video! I would like to suggest CSB to add the transcript of the safety videos at each CSB investigation webpage. It would make easier to translate them in other languages, and add subtitles to those videos.

@robertjenkins6132 5 месяцев назад

You can get the transcript from RU-vid. I think they moved it into the description? Copy-paste. You might also be able to get it using certain open source command line software, but I'm not sure I'm allowed to say its name because it can be used to down-rhymes-with-mode videos. But anyways, recently CSB stopped uploading high-quality captions; nowadays they instead rely on YT auto-captions, whereas their old videos had proper captions. Also YT got rid of community-contributed subtitles. I'm replying to an 8-year-old comment lol

@ryancochran7390 3 года назад

One dude reset the alarms in the facility and and caused so much chaos. You wouldn’t think that would ever cause that. It kinda shows how little things can cause huge problems.

@Cypher791 4 года назад

"Have you tried turning it off and on again?"... yes... it blew up >_>...

@markgohl2660 7 лет назад

Same Problem as steam hammer I suppose. Large quantity of liquid gets up to high speed then slams into closed or restricted piping. Since the liquid is largely incompressible. The pipes adsorbs the energy by stretching. This can generate very large forces. I have only ever used ammonia in laboratory work in solution. Just having solution in open beakers is enough to clear a room. Releasing thousand of pounds of the dry stuff into the air is a really bad move.

@wolphin732 3 года назад

More of Steam Hammer is a type of Hydraulic Shock, just that in this case it wasn't water... and they are using the engineering technical name for it.

@skeetrix5577 Год назад

@Kradmelder_Marc_Sellmann 4 года назад

Great Videos. I'm serving in an State OSHA Authority here in germany and have to investigate accident and worker complaints related to hazardous chemicals (although our incidents are mostly smaller). Every video from CBS shows me new stuff to learn from. Thank you for that and greetings from Germany.

@Oxygentleman 4 года назад

You have to hand it to CSB, you have to be pretty good at your job to make people want to watch PSA's

@sargentsakto9236 5 лет назад

Interesting video. Never would have thought this could happen so quickly. It looks kind of like what you get sometimes in homes called water hammer. You get a banging noise in your water pipes when you close a faucet quickly. You put in a small tank that had a diaphragm with an air space in the tank. Because air can compress the sudden water pressure from shutting the faucet can be absorbed by the tank kind of like a shock absorber.

@skeetrix5577 Год назад

@rogerscottcathey 6 лет назад

These are fascinating videos. One thing tho, seems like there is no dearth of accidents to review. This kind of show should be played on national tv regularly.

@UltraGamma25 4 года назад

Yepp. Instead of the usual bs, we could actually be learning something. I miss Discovery, Animal Planet, and the History channel.

@esjihn 4 года назад

The 3d models look amazing props to whoever did it

@Serostern 9 лет назад

Bloody hell that is scary, ammonia is not to be messed about with. I wonder if the issue with cold liquid ammonia going into the defrost cycle was known beforehand.

@sootikins 9 лет назад

When I worked on ammonia control systems in the '90s this was well understood. We always designed the controls to perform a cool-down and a pump-down of the evaps before re-introducing liquid. Operators could not defeat this from their HMI consoles. However, a determined maintenance guy with a programming terminal could manage it if he understood the program well enough to know what bits to flip (but poorly enough to not understand the possible consequences). Wish the video was clearer on what exactly the people did when "manually resetting alarms", e.g. did the system allow them to do this from their console (bad design) or were they into the guts of the program (bad decision / bad training)??

@Serostern 9 лет назад

***** Thank you for the further information! I work with biomethane scrubbers, and our safety functions can not be bypassed by flipping bits, the safety PLC does not allow bit states to be altered when in run mode.

@dallasbabcock 9 лет назад

***** The video made it sound like they reset the PLC, which could have defaulted to the run state, if the evaporator was in the defrost cycle, defaulting to the run state would have re-introduced the liquid prematurely.

@sootikins 9 лет назад

Dallas Babcock Certainly a good possibility. Without seeing the actual PLC code involved in the incident I don't think us spectators will ever know for sure though. I always write important stuff like defrosts using retentive logic so the status is remembered across power-cycling & such, but of course that can be defeated easily enough if maintenance plugs in a terminal and wants to defeat it. Thus, I suppose, the reason we have "safety PLCs" such as GuardLogix now...

@sootikins 9 лет назад

Seroster And I would hope that now days new ammonia systems are being equipped with such PLCs. Getting all the old ones upgraded could take a few decades though. I know of lots of PLC-5 systems that I put in during the '90s that may very well run 40 years without replacement - just like they ran the relay systems that the PLC-5s replaced for half a century...

@seanriopel3132 4 года назад

I love it when this guy narrates the videos.

@slitor Год назад

I used to have a summer job where we washed, sorted, froze ( using a freezer conveyor), packed and stacked strawberries. It was MUCH smaller operation then this, but we used Amonia refridgiration. I remember comming to the morning shift and being sent home becaus of a small leak in one of the amonia pipes, and BOY does that get through your noose. I can't imagine being exposed to that much concentration, good thing the cleanup crew were outside. Also I wonder if we had the best routines, the shift leaders were for the most part also on summer jobs. But again it was a small operation servicing maybe 20ish farms and orchards.

@TheCrazykids777 4 года назад

Never thought I’d find this interesting. This video is of high quality

@WacArnold 3 года назад

I wish the USCSB's media developmeny team could have intra-industry workshops with other government agencies. We would have so much more amazing content.

@kefpull6676 2 года назад

this is what a "remaster" should be: even better animation:✔️ even smoother voice:✔️ amazing

@uncleogee604 6 лет назад

Those hands though

@Pbergo 3 года назад

The narrator deserves an Oscar. I bet he could make a documentary about sawdust interesting.

@fauzif7086 5 лет назад

production quality of this video is superb

@icommentalots 3 года назад

3:43 I love crossover episodes

@bd-op1fl 5 лет назад

Crazy part is i lived in mobile Al my whole life 20yrs and never heard about this ig the deep water clean up kinda masked the importance of the accident everybody was worried about that a lil more ig

@beachmerk 3 года назад

I don't know why I can't stop binge watching these

@toddthecat1921 2 года назад

who the hell is naming these and why are they so good at it

@yuGtahT 2 года назад

I love these videos, their advice is always like "don't do that" lol

@asscheeks1827 3 года назад

I've watched one video about 35seconds long and now im watching everything on this channel🤣 and I can't stop I see a video and I MUST watch

@SuperCortes10 3 года назад

WHY ARE THESE SO INTERESTING AND ENTERTAINING?!

@kentslocum Год назад

Thanks to this video, I am now extremely nervous when I drive by a local creamery every day on my way to work. They have what looks like large ammonia refrigeration units on the roof, just like this video.

@--dh-- 6 лет назад

1:40 AM and I can't stop watching these

@1987FX16 4 года назад

I'm from Mobile, Al and remember this happening. It's really interesting seeing what actually happened that day. He said Theodore,Al and I was like hold on a minute. lol

@I_SuperHiro_I Год назад

I want this guy to narrate my everyday life in the 3rd person as I go about my business.

@poisenbery 3 года назад

bro these animations are INSANE

@SuperRaijin 4 года назад

These videos have like half-life style music over them and it's so fitting

@crow9149 4 года назад

With the thumbnail and title it looks like a retro futurist synthwave music video.

@isbestlizard 3 года назад

CSB safety videos are my new entertainment

@bubbajoe745 4 года назад

The animations are so good

@kevinbyrne4538 5 лет назад

Would it really have been too difficult or expensive to install a few thermometers in the system, in order to warn operators that the refrigeration pipes were still hot after being defrosted?

@UltraGamma25 4 года назад

^This

@DLDrillNB 4 года назад

Quite the coincidence that the contractors were a Deepwater Horizon cleanup crew, of all things

@Tonatsi 3 года назад

Before watching: imma guess it’s the water hammer effect After watching: yup, water hammer

@bobbygolding2859 5 лет назад

I don’t work in the safety or machinery industry what so ever, but these videos are so damn good...

@mattjohnson7775 5 лет назад

excellent video! also these videos are got damnly addictive

@orlandopozo8722 3 года назад

It is very important that the investigations carried out by experts be able to locate the cause of these catastrophic events. There are no effects, without first being produced by a cause, the important thing is to identify the causes so that they are not repeated.

@boowiebear 3 года назад

Hello CSB, do companies react or make changes when you release your reports? It would be interesting to know how many do. I can imagine some say it is too expensive or it won't happen to us. Hope they use your amazing insight and knowledge. Some of these disasters are awful. Thanks for what do.

@rafzombie5907 3 года назад

On my 2nd wave of reviewing them all! From like a year ago

@RizztrainingOrder Год назад

Why am I addicted to these?!

@peasley9 5 лет назад

CSB, I need more videos please.

@zarco5855 3 года назад

These videos are great

@codered6938 Год назад

I remember this, I was the operator in the facility that day and the reason I manually override the system is because my supervisor didn’t want to completely shut down the system because we lost much money the day before due to the power loss.

@Failure_Is_An_Option Год назад

Liar. I know the guy and he speaks English perfectly... that is if he could type at all. Because he has been dead for about seven years now.

@skeetrix5577 Год назад

if dude worked at the place let him prove it because I have a question can you tell me how exactly the system was running a defrost cycle while the electric was out? the video explains it as immediately after power was restored, the system was in the middle of a defrost when they tried to restart it but doesn't make sense how that happened if there is no power to heat the ammonia.

@jakekovacocy4408 2 года назад

Why are these videos so addicting TELL ME THE SECRET :) nice job!

@analogueoverdigital929 2 месяца назад

I used to work at a huge A Ammonia refrigeration food plant and when they taught us about how it worked and if the alarm ever goes on to literally stop and find the closest exit. These systems are no joke, and most arent maintained well..

@briangiller5253 4 года назад

Instead of Live PD, LIVE CSB!

@Medic_312 3 года назад

Seeing the incredible work the CSB does made me want to work for them. Come to find out they are all PHd credential physicist and scientist.

@evryhndlestakn 10 месяцев назад

Someones got to sweep up & get coffees for the important people mate.

@hurricanemeridian8712 2 года назад

Imagine trying to clean up an oil spill just to get gassed by another chemical/petroleum facility failing right next to you

@beeble2003 2 года назад

It was neither a chemical nor petroleum facility...

@purplealice Год назад

When I was in college, I had a summer job at an aircraft factory near my house. I worked in the "blueprint library", which was also where most of the document printing was also done. I worked at a folding table, making enormous blueprints fit into 85x11 file folders. There was a large blueprint machine next to me. Blueprints are developed with ammonia gas. There was a huge tank of anhydrous ammonia next to my chair. My boss thought it was funny to bang on the tank with a folding stick, to make it ring like a gong and make me jump out of my chair. I was always afraid the vibration would damage the valve on the tank and allow the corrosive gas to pour over me.

@josiahdixon1018 4 года назад

We use the same stuff as nitrogen fertilizer on crops. Sometimes there is just a little cloud that comes up from the applicator when making a turn at the end of the field and if it gets in the cab, your lungs can start to burn and your eyes tear up. Up until a couple years ago we had to connect hoses manually to the tanks but now there is a safer but more expensive system that has been installed.

@pmally2006 5 лет назад

Damn that’s crazy! Anhydrous Ammonia is no joke.

@jldouglas77 3 года назад

I was across the river when this happened. About 50 people went to the hospital just at our site

@stranger5088 3 года назад

I watch these to make myself more aware of potential hazards that I may encounter in my work as an industrial mechanic.

@mattlogue1300 4 года назад

Somebody commented earlier... "And then somebody opens a valve...".

@arbitrarylib 4 года назад

Great animation

@Steve211Ucdhihifvshi 2 года назад

These are great videos, its sad to see the blame game but in so many of them with such emphasis placed on the worker.

@beeble2003 2 года назад

That's not the video I saw, at all. The worker made a mistake: it is right that this is pointed out. It is also pointed out that the software shouldn't have allowed that worker to make that decision; that the system should have been designed to always purge the evaporators before starting a refrigeration cycle; that the evaporators shouldn't have shared piping; and that a number of other things should be improved. This is not a "blame game".

@larry_ellison 6 лет назад

Low-key these videos are NICE

@En.GergerRacc 5 лет назад

High-key, these videos are nice. Proclaim your affinity with pride. More people should see this channel.

@susanwahl6322 3 года назад

I still love the animation.

@Rfc1394 3 года назад

In houses, hydrolic shock is referred to as "water hammer" when water rushes into an empty pipe or where a vacuum condition - like when frozen pipes thaw - occurs.

@LJCarrful 7 лет назад

Great video. I don't really know the details of this refrigeration system, however I suggest mentioning why to use ammonia (a toxical substance) and not contemplate inherent safety principles by using an inert an non toxical refrigerant. I am sure there is a reasonable answer to this and I would like to know it.

@pvtimberfaller 7 лет назад

Probably more efficient. I am not sure about labeling it "toxic" tho, bad stuff but its most common use besides refrigeration is fertilizer.

@Vincent_Sullivan 6 лет назад

There are quite a number of substances that can be used are refrigerants but they all seem to have some significant downside. Some, like ammonia (NH3), are toxic. Some, like cloroflourocarbons (CFCs like R12), deplete the ozone layer and have been banned by the Montreal protocol. Some, like Hydrochlorofluorocarbons (HCFCs like R22, also in the process of being banned) deplete the ozone less but are greenhouse gasses. Some, like Hydro fluorocarbons (HFCs like R134A) don't deplete the ozone but have a high greenhouse gas potential. Some, like a mixture of hydrocarbons (propane, butane, etc. like HC12) are very flammable/explosive. Some, like carbon dioxide need very high pressures and temperatures to work. The bottom line is that in each case the engineer has to decide which refrigerant to use based on their desirable and undesirable characteristics including availability, system cost, efficiency, toxicity, and environmental impact among others. I expect it isn't always an easy to make decision!

@jmowreader9555 6 лет назад

Luis, I checked a refrigeration website, and they name four advantages of ammonia refrigerant: it's less expensive to build an ammonia-based system, ammonia is more efficient at transferring heat so it costs less to run, it will not deplete the ozone or cause global warming, and it is far cheaper to buy ammonia than to buy a CFC-based refrigerant. It has two problems: it's incompatible with copper so you must use aluminum tubing; and it is very poisonous in high concentrations...which is mitigated by two factors: it's lighter than air so it leaves the area in a hurry, and it is so pungent people will get the hell out of the area long before concentrations reach poisonous levels.

@performa9523 5 лет назад

Many refrigerated facilities are quite old, and Ammonia was definitely the refrigerant of choice for most of these facilities when they were built. Changing them over to something less hazardous (depending on your definition of less hazardous might be) would be very expensive, and we all know what big corporations will choose when it's a choice between profits or safety.

@amandalong5916 2 года назад

Hello, I am an HVACR technician & can provide some insight. Surprising, ammonia, also referred to as R717 when used as a refrigerant, is considered an environmentally friendly refrigerant. Other common refrigerants used in refrigeration (such as R134A) deplete the ozone layer when released into the atmosphere & are heavily regulated by the EPA. They are also much more expensive. Ammonia (R717) is also very good at what it does & more efficient than other refrigerants in large industrial applications.

@MrRandy494 3 года назад

How does frost stop cooling?. Or does the temperature stop the chemical cooling process?.

@hephaestus6365 3 года назад

I've learned from these videos that alarms are NEVER taken seriously.

@danarzechula3769 3 года назад

I learned that when my kid was in the hospital with a serious pneumonia and the nurses ignored the SpO2 alarm...

@goneutt 6 лет назад

I wonder if the computer controls had rebooted during the outage.

@lincolnhunt9558 5 лет назад

I've heard of small light weight evaporators blowing up from coming out of defrost too quick as well.

@roboticunclephil 2 года назад

they should fine these companies more for each misstep they make after a hazardous chemical release

@railgap 2 года назад

I worked in a microfilm printing/copying facility briefly. There were two 100-pound tanks of anhydrous ammonia in the lab for the diazo process fiche copier. One door to get in or out, and no SCBA gear provided, no training. I quit after a few weeks.

@beeble2003 2 года назад

*SCBA, unless you were expecting to swim out. 😉

@Failure_Is_An_Option Год назад

I quite too.

@railgap 21 день назад

@@beeble2003 Oh goody, a low-functioning autistic who can't stay focused on the conversation and instead of listening, interrupts you to tell you there's a button missing from your shirt. Given my years of experience in both diving and giving safety training on confined spaces, I probably know more about both SCBA and SCUBA equipment than you do. Typos happen, fathead, so shut up and sit down, because the adults are talking.

@railgap 21 день назад

@@Failure_Is_An_Option Oh there's another one. I bet you never make typographical errors. I bet you're perfect. I bet you have loads of friends and plenty of hobbies which is why you're wasting your time and everyone else's with retarded comments on typographical errors. Where are all you adult children coming from? Shut up, no one cares!

@railgap 21 день назад

@@Failure_Is_An_Option Heard of spellcheck, meatwad?

@stevebell4906 4 года назад

The cheapest thing to do is always nothing...With the roll back of regulations expect to see these type of incidents become common!

@danarzechula3769 3 года назад

These should be required viewing for anyone who wants to eliminate or decrease funding for government oversight of industry

@onceuponatimeonearth Год назад

It's incredible how often accidents occur because of human intervention into automated systems that are working fine. System alarms are cleared or ignored, recommendations and maintenance procedures not followed.

@mbm2355 3 года назад

The algorithm is never late, it recommends precisely when it intends to.

@thebowshock7729 Год назад

Does anybody know what software is used to make these 3D animations? They seem to be more about precise reproduction of data and models of objects involved than fancy looks

@bmaiceman 3 года назад

Years ago I worked at Simmons Foods. A chicken processing Co. Our refrigeration units where Amonia operated.... One day I came to work in the morning and something went wrong.... Large amounts of ammonia was released into the air. I had to cross a road from the parking lot to the plant. I almost could not make it to work... It was BAD... Still don't know to thus day what haponed