I think he meant an implosion.
I think he meant an implosion.
lol ya BLEVE < that nasty I issue of it sounding as e some times gets one confusled
@ Xeon th MG Pony-
You may leak test outside everyday with propane and a lighter and feel really safe about it. That is not the case here. We are not outside and we are not in the same situation as you.
I think it is a bad idea to tell these guys that it is safe to leak test phase with a lighter when using propane.
@ n00b 0f l337 - If you want to leak test with propane and a lighter that is your business, but I think it is a very bad idea. Nitrogen would be the acceptable method.
Please don't advocate the use of a flame when searching for a leak when using propane in the PhaseChange forum. It is not my business what you do in your personal setting. It is my business what you advocate here in this forum.
Both of you guys are valued members, we are happy to have you here.:)
I removed my posts.
I do respect that it is indeed dangerous if not don correctly hence why I do indeed stress the need to be sure of the proper procedure (You'll note in one thread I stated all ways be sure to have a constant flow of air or well ventilated) Nitrogen or CO2 are the "Ideal" way sadly we are oft forced to less then ideal.
Every one must all so be aware at such temperatures all refrigerants are flammable with deadly byproducts. It is an inherent risk that comes in with the territory, and I fully support there being great care implemented.
which XS member lived there and didn't follow our advice?Quote:
Originally Posted by wdrzal
Okay.... no need to make this thread unresonable. If it could happen to joe 6pack it could happen to us. Could be dog biting on homemade regulator line with no check valve for all I care...
I just need some solid input on detail of what to avoid when doing things from your experieneces, Intelligence and GOOD heart :)
Comeon guys...!!! I know you guys have more there somewhere.
*bump* I see people making safety suggestions in other threads, which would be nice if they could be compiled into a single thread such as this one.
For example, quoting unknown_road
Here's another one with regards to "universal suggestion of expansion tanks"Quote:
First off all I don't like it that lots of people here build cascades without high pressure cut off's. Now I see autocascades becoming more popular and I'm afraid people won't use high pressure cut offs on them as well while the need for it on an autocascade is larger by far.
Suppose you get an autocascade working well, what will happen when you put a load on the evap bigger then what you tuned it for? The HX also gets more load and might not be able to handle this. What will happen is the temperature will go up and the high pressure gas isn't able to condens anymore and pressures will rise very very quickly. This is a very dangerous but likely scenario. When an autocascade doesn't work fully this change is even greater.
The same will happen when the low pressure gas expansion device (cappilair, TXV etc) gets clogged with debris or will freeze shut because of water remains in the system or when more stages are used oil that gets trough the oil sep. Also very possible to happen.
Offcourse these things can also happen with cascades but since the autocascades we build are less reliable in their workings, the chance of failure is higher so I wanted to point this out once more.
take this serious and always use at least high pressure cut off valves!!!!!
This comes form the cascade666 thread. Best advice for this part was, buy a commercial expansion tank for refrigeration purposes, it will be rated for the proper pressures.Quote:
Quote:
Originally Posted by epion2985
We should start preaching expantion tanks as a must for cascades.
Expansion tanks while useful in controling pressure if they are not properly constructed they will turn into a bomb!!!!!!!..................because they have a much larger surface area they will be the first to fail, If the tank is not constructed out of heavy enough gage material. Psi ,pounds per square inch, the larger the area the more affect the pressure has.
and as runmc said ,cutofss offs and releif valves are a must.
When you charge without the low stage running you can see fast enough if you need an expansion tank. When you charge it to 10 bar static, it will always be 10 bar static.
Even if you charged in the dead of winter, and then summer rolls around?Quote:
Originally Posted by Unknown_road
since there is no liquid refrigerant the pressure rising due to temperature is low.
You can make an estimate how much the pressure will rise with the ideal gas law : http://en.wikipedia.org/wiki/Ideal_gas_law
Nice to know someone beside a fireman know what a BLEVE is.
:welcome: to :lastweek: er, 2 years ago.
Good you are reading the stickys. Welcome, are you into phase yet?