Hose Burst
 

A guy name lukasz70 posted this at the amdmb board


http://lukasz70.50megs.com/burst1.htm


Now that has to be some cheap ass hose or he,s running one hell of a pump lol

http://www.amdforums.com/showthread.php?threadid=176797

You should've posted a link to the thread...

Cause he sounds pretty smart:rolleyes:

gay name? well nOv1c3 is much better isn't it, you dumb ass :p

LOl a miss typed :p

no wait, im the bumd ass, i miss read your post :D unless you alrady edited it,
i cant even remeber, and i read it like 5min ago
sorry, it cause i havent had much sleep, pulling all nighter for exams:cry:

lmao No i fixed her up ..I,m hung over a wee bit so I didnt notice it tell you said somthing :p

LOL thats so funny, i only just signed up here last night and i see a pic of MY burst hose! it hapened because someone turned my pc on without my eheim 1048 on and the pressure from the heated water made the tube burst:cry: everthing got wet but it all still went after half an hour with a hair dryer:D

details:
http://forums.overclockers.co.nz/sho...&threadid=3389

Looks like chemical corrosion to me, or perhaps melted tubing.

He says on one site "My PC got turn on with out the pump on and the pressure from the built up heat burst one of my tubes!!!"

I don't quite buy it. Water density doesn't increase by any more than 3% from room temperature to near-boiling. As long as there's flexibility in the system to account for this increase in volume (which there is, unless the tubes here were incredibly brittle), there's no way increased temperature can burst anything.

Now, if this dupe noticed what was going on and turned on his pump only *after* his block and the tubing attached to it was at a nice 60-80 degrees C, I could see the water hammer busting open a weakened and melted piece of tubing, such as that kink right above the hose barb.

I just can't imagine the tubing getting that badly damaged by heat *before* the CPU was toasted.

Alchemy

Well the bios was set to shut down at 65 degrees C and it didn't shutdown so i dont think it melted. Someone turned it off about 20 - 30 secs after it burst.

Alchemy: I am no dupe, i was not home when this happened. The tubing was stretched/thinner at that point over the barb. I dont think it was a chemical corrosion because it was all fine for about 2 months. I thought the tubes would have accomedated the extra 3% volume (they were NOT brittle at all) but i also dont really know what happened.

well maybe i am a dupe for letting my girlfriend use my pc without telling her to turn the pump on:D

hey max, i started the post a few hours ago on the AMDMB.com forum, no on there believes it lol, go to the link on this page explain what happened to at ambmb or just give them the link to what you posted.


i found the pic on the austalian overclockers site in the gallery section, i hope you dont mind me using it in the forum.

I don't know why ya'll miss the obvious:

The hose probably couldn't withstand the high temp (even Tygon can't), it weakened under the high heat, and the pump had an easy time bursting through it.

The lesson? Wire the pump to the PSU.

looks like another strong case for thick walled tubing 8)

peace.
unloaded

max, I apologize for the "dupe" remark.

I'm still a bit skeptical that the CPU can even function hot enough to do that sort of damage, but I can't really think of a better explanation.

Alchemy

Actually, if nobody believes how weak nylon hose gets when it heats up, throw a little piece in your microwave for about 30 seconds (on a paper plate :) ).

It will be hot to the touch, but not horribly so, and will most likely collapse under it's own weight.


How do I know this? I had some 1"OD|3/4"ID nylon hose that was flattened by being on the spool at the store too long, and I figured I had nothing lose by trying. :p

A CPU can function at significantly higher temperatures than PVC can. There's a good reason why that stuff tends to have a service ceiling of 140°F. All you need to do is drop some in a kettle of sub-boiling hot water to see it turn to jelly. Specifics vary with formulation, but all I know of will die long before a processor would.

i've got springflex tubing now and when i put it all back together with GPU and northbridge blocks i will use a relay :) lesson learned.

I think that at 150C the cpu would still be working (assuming it isn't oc'ed and that it's an amd). Maybe it would crash but it would survive. That's a new way to burn-in your cpu.

Um sorry but overclocking would have nothing to do with what temps the chip will survive at. The only thing it would affect is what temps its already running at before a loss in cooling.

I think he was referring to the chip still operating 'normally' at 150 degrees (and he probably meant Fahrenheit :) ), since AMD chips, and possibly Intels (although I have no experience after 6th Gen), are spec'd to operate at such a temp. Obviously, most chips don't operate both hot and OC'd. If that's the case, you haven't OC'd it far enough. :D

Pump was off and never got turned on, that's part of the mystery...

Could the water have boiled?(vapour pressure forms at boiling yes?), is the CPU oc'ed?, I'm wondering if it'd still be 'running' at 100~DegC?...

I doubt it boiled because it was set to shut down at 65 C, even after the hairdryer all the bios settings were fine and still there.

sweet, 4 more posts and i can have an avatar:D

DOH!

I am betting that the heat from the block got into the water, and the tubing, not being able to withstand the heat, simply gave out.

There would have to be some kind of external force though, so I'd guess either gravity (if the system was open aka not sealed) or vapor pressure (if the system was sealed) which does not imply that the water was actually boiling. Note how the block remained perfectly intact. There could also have been a physical strain on the tube, from a bend.

Who knows, maybe the hose already had a small nick or cut in it, and the heat simply accelerated the burst.

That's not what vapor pressure is, though. Vapor pressure is a means of describing how easily a liquid evaporates at a certain temperature, but if there's a physical constraint to evaporation (such as a closed container) the vapor pressure isn't going to become a force to burst it.

If that CPU could get to about 105C and stay there long enough for just a little bit of the water on the other side of the block to boil, then yeah, this whole incident would make perfect sense. But that would take at least a couple seconds, and specs on the hottest-running AMDs I've seen say they crap out at around 80C. I'd be amazed of any CPU of that breed could even *reach* 105C before shutting down or self-destructing, never mind stay there for a few seconds.

Anyway, in the pictures it looks like the damage did happen at the kink where the tubing turns about 90 degrees to go to the rad, so it's clear that was the most physically strained part. And in the case of boiling, the burst would more than likely occur very near the waterblock, unless there was an exceptionally weak point somewhere else.

Alchemy