It's Cold !

[westcliffe01]

I must be missing a step in the math here.



If I look at that graph for propane, at -20C the vapor pressure is just under 2 bar or 30psi.

How do you get from 30psi to 14 000 psf ? 30psi x 12 x 12 = 4320 pounds per square foot. Right at freezing point maybe double ?

BTW, that is possibly a classic example for a hydrogen embrittlement failure, which caused the WW2 liberty ships to break up and sink in cold water at high latitudes.

Here is something you don't see everyday.


Tank failure of the LP gas truck at East Chain LP. Christmas day 7 AM.
Failure started at the bottom where the tank fastens to the truck. No
fire but the truck was thrust across the road north into the neighbors field.
Initial thrust would have been about 14,000 lb. per sq, ft. Make your own
quess on how many sq. ft. the opening is to finish the math of total
thrust

View attachment 356457
at the beginning of truck movement. No one was there when it happened.

 

[kenmac]

Forecast for my area is 13* tonight.:shocked:

 

[DarkBlack]

Winnipeg is not called Winterpeg here for nothing :laughing:

That's a normal temperature for Manitoba. Kids learn the correct way to dress and behave at an early age.

Either extreme heat or cold can kill, anywhere. IMO, the people most at risk are the ones who've never seen these extreme conditions before as they are often not prepared.

In the Far North, kids don't get a day off school till -60C.

Rgds, D.

I guess they never had a day off. according to Wiki: "The coldest temperature ever recorded in Winnipeg was −47.8 ｰC (−54 ｰF), on 24 December 1879 "

That's still crazy cold in my book.

 

[Marveltone]

I guess they never had a day off. according to Wiki: "The coldest temperature ever recorded in Winnipeg was −47.8 ｰC (−54 ｰF), on 24 December 1879 "

That's still crazy cold in my book.

That's crazy cold in anyone's book! :cold:

Joe

 

[3930dave]

The Globe and Mail here had a great series of articles on the Arctic in their print edition last Saturday. Can't seem to find much on the website today.... another case of print outperforming digital.....

That -60C number came from that paper. Far North (my term), or Arctic conditions - for them Winnipeg is way Down South !

I remember an old timer I worked with talking about trying to start cars out West, when everthing was carburated. With a V8, you had 2 block heaters to plug in, one for either side of the V !

Rgds, D.

 

[adirondackmtnman]

I must be missing a step in the math here.

<img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=356506"/>

If I look at that graph for propane, at -20C the vapor pressure is just under 2 bar or 30psi.

How do you get from 30psi to 14 000 psf ? 30psi x 12 x 12 = 4320 pounds per square foot. Right at freezing point maybe double ?

BTW, that is possibly a classic example for a hydrogen embrittlement failure, which caused the WW2 liberty ships to break up and sink in cold water at high latitudes.

I thought 14k pcf sounded a little high. I guess if the truck was left out of gear, it wouldn't take much to set it rolling however.

Sent from my LGL35G using TractorByNet

 

[Pine Strip]

I must be missing a step in the math here.

View attachment 356506

If I look at that graph for propane, at -20C the vapor pressure is just under 2 bar or 30psi.

How do you get from 30psi to 14 000 psf ? 30psi x 12 x 12 = 4320 pounds per square foot. Right at freezing point maybe double ?

BTW, that is possibly a classic example for a hydrogen embrittlement failure, which caused the WW2 liberty ships to break up and sink in cold water at high latitudes.

That was a forwarded e-mail attachment with the picture from an unknown source......You're correct 'Remarkable Claims require Remarkable Proof'

 

[Looking4new]

The Globe and Mail here had a great series of articles on the Arctic in their print edition last Saturday. Can't seem to find much on the website today.... another case of print outperforming digital.....

That -60C number came from that paper. Far North (my term), or Arctic conditions - for them Winnipeg is way Down South !

I remember an old timer I worked with talking about trying to start cars out West, when everthing was carburated. With a V8, you had 2 block heaters to plug in, one for either side of the V !

Rgds, D.

I used to run two block heaters in the middle freeze plug on each side of my small block Chev. Just had to make sure you plugged into a 20 amp circuit.

 

[vtsnowedin]

Well yesterday started out at -14F and got up above zero about noon. I had parked my 5045E too far from the house for the cord to reach so I rolled out the Honda generator , fired it up and plugged in the block heater for an hour while I transferred some more wood into the basement. Quite a hole there in the inside pile over the last week. The tractor started right up so I seam to have the jelling fuel problem licked. It's supposed to warm up and snow today then back into the deep freeze. + 8F right now with a few flakes going by so the forecast seems to be right.

 

[NT304]

Finally a little warmer today. Pic is of my uninsulated shed in the morning(wed) after loading up the woodstove the night before. -2F outside, 65F inside.