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Post by breesfan on Jan 18, 2016 2:42:32 GMT
I was not that interested in it but I think it was interesting once they made a dent in the old corroded tanker, it got crushed.
I also thought the rain was just on one side and not both sides.
When they said something about a mishap, I thought maybe something happened to Adam or Jamie.
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Post by ironhold on Jan 18, 2016 4:10:27 GMT
The episode is up for download on iTunes.
Also, the bit with them crushing the 1 gallon can? Mr. Wizard did that on an episode back in the 1980s, with him explaining to the kid that the vacuum was an "invisible genie" he could use to impress his friends.
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Post by the light works on Jan 18, 2016 5:22:53 GMT
Mrs TLW asked about the rain not being over the whole car - and the short simple answer is that was the best that ground mount nozzle could do.
I found the actual action of the collapse of the car to be quite interesting in its character.
trivia bit - Boardman has a rather nice RV park on the river my parents like to use for a stopping point when they go in that direction.
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Post by silverdragon on Jan 18, 2016 7:42:00 GMT
Just for note, I am sure I have mentioned this somewhere on here before, this is not a new idea, it has been done several times, this below was uploaded to u-tube 2008.
There are three or four similar video's on u-tube.
This is from 2014, moved from "wrong thread"
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Post by the light works on Jan 18, 2016 15:51:06 GMT
Just for note, I am sure I have mentioned this somewhere on here before, this is not a new idea, it has been done several times, this below was uploaded to u-tube 2008. There are three or four similar video's on u-tube. This is from 2014, moved from "wrong thread" the question at hand would be whether any of them put together the documentation of whether the vacuum from steam cleaning and then sealing it could do it. one thing I wish they had given more attention to would be what safety mechanisms they had to defeat in order to do it. |
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Post by breesfan on Jan 18, 2016 16:37:37 GMT
I haven't checked the videos out yet but I admit, I wonder if maybe the newer ones are just sturdier with the safety mechanisms and it was really hard to do it. I think they did state they disabled the safety mechanisms but I wonder if they missed one of the mechanisms or just didn't wait long enough.
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Post by the light works on Jan 18, 2016 16:49:04 GMT
I haven't checked the videos out yet but I admit, I wonder if maybe the newer ones are just sturdier with the safety mechanisms and it was really hard to do it. I think they did state they disabled the safety mechanisms but I wonder if they missed one of the mechanisms or just didn't wait long enough. as jamie said, it is really hard to crush a round shape. look at the difference between the flat sided can and the round oil barrel. having the newer ones better made and more uniform would definitely make a difference. but the bottom line is something has to give before it can collapse. - and a round shape is very strong. |
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Post by silverdragon on Jan 19, 2016 7:51:09 GMT
Safety mechanisms.... some of those tankers hold LPG, at pressure.
Some are used for other gasses at pressure.
There is a set pressure limit gauge that will blow off a little steam should the pressure rise, and by that, sunlight can warm a tank a lot, but after that, not much else.
Road tankers use scavengers to return gases back to liquid state by cooling, not easy on a rail tanker that has no independent motor.
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Post by the light works on Jan 19, 2016 15:09:15 GMT
Safety mechanisms.... some of those tankers hold LPG, at pressure. Some are used for other gasses at pressure. There is a set pressure limit gauge that will blow off a little steam should the pressure rise, and by that, sunlight can warm a tank a lot, but after that, not much else. Road tankers use scavengers to return gases back to liquid state by cooling, not easy on a rail tanker that has no independent motor. but I suspect pressure relief mechanisms don't work for vacuum - however, a bulk liquid tanker will have a vent for draining if it is made correctly. - we had one tender when I was young that they said the sides quivered as it was emptying - and the water didn't flow freely. they fixed it by propping the top fill hatch open. |
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Post by WhutScreenName on Jan 19, 2016 18:56:34 GMT
I also thought the rain was just on one side and not both sides. That was the comment my wife and I made during the episode. However, with the results they got, having uniform rain across the tanker wouldn't have made any difference at all. |
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Post by breesfan on Jan 19, 2016 23:02:18 GMT
I also thought the rain was just on one side and not both sides. That was the comment my wife and I made during the episode. However, with the results they got, having uniform rain across the tanker wouldn't have made any difference at all. Yeah, maybe it's certain tankers and the one they got was very sturdy and maybe quite new. |
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Post by the light works on Jan 20, 2016 1:39:09 GMT
That was the comment my wife and I made during the episode. However, with the results they got, having uniform rain across the tanker wouldn't have made any difference at all. Yeah, maybe it's certain tankers and the one they got was very sturdy and maybe quite new. it WAS slated for demolition. that would imply something was wrong with it that precluded repair, and since they allowed Adam inside of it, that wouldn't have been some kind of contamination. |
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Post by blazerrose on Jan 20, 2016 2:12:52 GMT
My stooopid DVR didn't catch this episode, so I am catching the Wednesday Science Channel rerun.  |
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Post by ironhold on Jan 20, 2016 3:31:07 GMT
Yeah, maybe it's certain tankers and the one they got was very sturdy and maybe quite new. it WAS slated for demolition. that would imply something was wrong with it that precluded repair, and since they allowed Adam inside of it, that wouldn't have been some kind of contamination. Did they specifically say that it was slated for demolition? If they did, I missed it. Nutshell for those that don't do business: Equipment wears out over time. To recognize this, some countries allow businesses to take "depreciation" as a tax deduction, depreciation being a set percentage of the item's value. Once an item has been fully depreciated, it's quite common for companies to simply dispose of the item and get a new one; for example, this embarrassing incident after a plumbing company decided to trade in an older work truck for a newer one. In that sense, it could also be that the rail cars in question had reached the end of the road as far as depreciation went, and so the decision was made to offload them for one reason or another instead of keeping them in service. |
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Post by the light works on Jan 20, 2016 4:47:44 GMT
it WAS slated for demolition. that would imply something was wrong with it that precluded repair, and since they allowed Adam inside of it, that wouldn't have been some kind of contamination. Did they specifically say that it was slated for demolition? If they did, I missed it. Nutshell for those that don't do business: Equipment wears out over time. To recognize this, some countries allow businesses to take "depreciation" as a tax deduction, depreciation being a set percentage of the item's value. Once an item has been fully depreciated, it's quite common for companies to simply dispose of the item and get a new one; for example, this embarrassing incident after a plumbing company decided to trade in an older work truck for a newer one. In that sense, it could also be that the rail cars in question had reached the end of the road as far as depreciation went, and so the decision was made to offload them for one reason or another instead of keeping them in service. it was stenciled on the car. |
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Post by silverdragon on Jan 20, 2016 8:34:56 GMT
It could be the pressure release system was already faulty that the tanker was ready for scrap.
It could be various reasons, many including the car it was sat on as well, repairing the brakes on them once fried can be a long job, and beyond economical repair, as in its cheaper to buy a new one.
Rain only on one side.
May I suggest filming reasons here, they wanted it to fail on the side they were filming it from.
Do they have vacuum vents?.. only when specified, the tanks are produced to withstand internal pressure, not external pressure, if they did, then the rings seen on the outside of some would be inside as well?..
May I suggest that blowing one up from internal pressure would take a hell of a lot more pressure differential than was measured?.
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Post by the light works on Jan 20, 2016 14:30:46 GMT
It could be the pressure release system was already faulty that the tanker was ready for scrap. It could be various reasons, many including the car it was sat on as well, repairing the brakes on them once fried can be a long job, and beyond economical repair, as in its cheaper to buy a new one. Rain only on one side. May I suggest filming reasons here, they wanted it to fail on the side they were filming it from. Do they have vacuum vents?.. only when specified, the tanks are produced to withstand internal pressure, not external pressure, if they did, then the rings seen on the outside of some would be inside as well?.. May I suggest that blowing one up from internal pressure would take a hell of a lot more pressure differential than was measured?. we don't know what the fault with it was, and it is probably worthless to speculate. brakes? I think not so much. if nothing else, they lift it with a rail crane and set it on new trucks (bogeys) rain only on one side: as I've already said - that was the best their ground mount nozzle could produce. vacuum vents - that was most likely not a pressurized goods tanker - which would mean they would have vacuum relief mechanisms for unloading. (I can tell by the shape of the ends - pressurized goods tankers are more rounded and have more serious guards on the fittings.) assiniboinevalleyrailway.org/avr/images/AVR%2031%20may%2008%20014s.jpgbut I agree it would probably take more pressure differential to rupture it. considering that 27 PSI isn't really all that much. (addendum: a bicycle pump withstands more than that and it is very thin metal.) |
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Post by silverdragon on Jan 21, 2016 7:35:19 GMT
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Post by the light works on Jan 21, 2016 14:52:30 GMT
Which are usually manually operated, or open the top hatch, but there is no automated vacuum release?... depends on how volatile the load is. gasoline is a manual valve, sometimes operated together with the dump valve - but they wouldn't be steam cleaning a gasoline tanker. a non volatile cargo may just have a flapper to prevent spills. |
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Post by blazerrose on Jan 22, 2016 5:58:56 GMT
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