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Kelly Kettle + idiot = burnt kids


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#11 Phone

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Posted 08 July 2018 - 11:29 PM

All,

 

I came across this story elsewhere and stopped for a brief moment.  It is not likely the teacher said anything. The father said he did review instructions "on line". He also said, "but the teacher said" and the teacher said "nonsense.

 

I notice the stopper is cork. All the science calculations are not really necessary.  Cork - and I'm just guessing, can sustain - ohh - maybe 1.4 atmospheres - probably 25 - 30 psi depending on the side of the opening.  To keep this as confusing as possible lets use a 50 cigar ring diameter.

 

Phone

 

I'd say a lack of attention got 3 kids burned.    



#12 chesters1

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Posted 09 July 2018 - 08:25 AM

When I worked as a volunteer steam locomotive footplateman, I used to do that all the time !

Hot water for tea (dont think how clean it is)With the added extra (for some strange reason) frying eggs on a dirty coal shovel! ,a train is a sort of multi cooker for the less hygienically inclined lol
A little bit more expensive than a microwave though and harder to transport and if you include warming to working temp a bit slower aswell

Edited by chesters1, 09 July 2018 - 08:27 AM.

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#13 Steve Walker

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Posted 09 July 2018 - 09:08 AM

All,

 

I came across this story elsewhere and stopped for a brief moment.  It is not likely the teacher said anything. The father said he did review instructions "on line". He also said, "but the teacher said" and the teacher said "nonsense.

 

I notice the stopper is cork. All the science calculations are not really necessary.  Cork - and I'm just guessing, can sustain - ohh - maybe 1.4 atmospheres - probably 25 - 30 psi depending on the side of the opening.  To keep this as confusing as possible lets use a 50 cigar ring diameter.

 

Phone

 

I'd say a lack of attention got 3 kids burned.    

 

 

The point is that if you confine the liquid it will be at above its boiling point at ambient pressure when the confinement is released. I don't think the kettle breached, I think the bung blew and the superheated water inside immediately boiled and sprayed out over the kids.



#14 Vagabond

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Posted 09 July 2018 - 10:52 AM

Hot water for tea (dont think how clean it is)With the added extra (for some strange reason) frying eggs on a dirty coal shovel! ,a train is a sort of multi cooker for the less hygienically inclined lol
A little bit more expensive than a microwave though and harder to transport and if you include warming to working temp a bit slower aswell

Dave, i think you are missing the point - i'm not talking about warming tea on the firehole shelf, nor frying eggs on a shovel.   I'm talking about working a steam loco with up to 220 lbs per sq inch boiler pressure - highly dangerous unless one knows exactly what one is doing.   Man is slow to learn, and it took lots of boiler explosions in Victorian times  before the lessons sunk in




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#15 Phone

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Posted 09 July 2018 - 11:39 AM

Steve,

 

I agree wholeheartedly.

 

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#16 Martin56

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Posted 17 July 2018 - 12:44 AM

It all very much hangs on the "Per Square Inch" bit, as a past Inspector in the Oil Tool Industry, some of the kit was up to 23,500 PSI test pressure (for a 15,000 PSI Working pressure wellhead)

It's really all about volume and the Pounds per square inch acting on it.

 

20,000 PSI in a 1/4" control line is next to nothing in real terms compared with same acting on a 30 inch wellhead!!

 

(not that 20,000 in a control line is ever applied - although would take it with ease!!)

 

In contrast, 30 - 36 PSI is about right for a car tire!! 


Edited by Martin56, 17 July 2018 - 01:02 AM.

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#17 Steve Walker

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Posted 17 July 2018 - 12:03 PM

If you're being sprayed with superheated water, the actual pressure is probably academic!



#18 corydoras

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Posted 17 July 2018 - 05:31 PM

If you're being sprayed with superheated water, the actual pressure is probably academic!

I'm not so sure about that. Compressed air at 23,500 PSI would probably rip the flesh off your bones.


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#19 Phone

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Posted Yesterday, 02:04 AM

All, 

 

I agree with Steve. specific PSI may well not have crossed the boys minds.

 

Which brings me to another story. - A Vagabond sort of story albeit brief.  Whilst fishing a small stream nestled in the mountains at - 23, 22.5 thousand feet try making a pot of tea or coffee.  The ambient air temperature was in the high 30's.  The rushing water had to be in the LOW 30's upper 20's.  Sometime it would skim over with ice when dipped from the stream.  Caution had to be use because it was painful to drink it quickly.

 

Anyway, those boys would not have had to worry about getting burned those couple days.  The coffee was even worse  I don't know what that is "technically" called but it is certainly a challenge  to get something warm to drink.

 

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