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Posted: Wed Dec 20, 2006 7:48 pm
by Hotwired
Liquification is the limit for air
Posted: Wed Dec 20, 2006 8:14 pm
by squeaks
Well, actually the limit for water pressure is how much pressure you exert on it. Usually it's just sheer volume of water on top that causes the pressure, but, like in 1 or 2 gallon bug sprayers, if you put pressure from something else, like compressed air, the water pressure is also increased.
Posted: Wed Dec 20, 2006 8:17 pm
by Dom
But remember that with air, there more room between molecules to be compressed than with water.
Posted: Wed Dec 20, 2006 8:38 pm
by sgort87
By uncompressable, it's meant that you cannot fit (considerably) more molecules per volume as pressure increases. With air, it's directly proportional.
Posted: Wed Dec 20, 2006 10:56 pm
by squeaks
Random question here, how did we get from abs vs pvc to water pressure?
Posted: Thu Dec 21, 2006 1:07 am
by sgort87
Read the posts maybe?
Posted: Thu Dec 21, 2006 10:16 am
by Hotwired
I threw in water as a genuine example of rated ABS being used for pressure applications.
Posted: Sat Dec 23, 2006 6:46 am
by rna_duelers
Over here in Australia we have Pressure Rated ABS piping used for marine applications and for farming and crop spraying,etc.There is definite spikes and dips in pressure with these systems that are used.
They actualy recomend the use of ABS piping in water tank use,which hold thousands of liters of water and thus there must be alot of pressure.The people that design these things are not dumb they must use those types of pipe for a reason so the pipe must have some advantages in pressure aplications.
The highest rating ABS pipe i have seen in PN22 rated to 22bar/323-PSI.
But if I would prefer PVC myself as I have not seen pressure rated ABS readily avaliable to the public.I do know a supplyer of pressure rated ABS and it is alot more expensive then pressure rated PVC as it is usualy used in large industrial use such as watermains and irigation.
As to the Water Vs Air pressure fight,pressure is pressure.It wouldnt be a very good system of measuring the force if you had an indevidual pressure for different types of substances and gasses.Just an example if you were to half fill a piece of pipe(ABS or PVC)with water and apply pressure though compressed gas there would be same amount of force,even have two pressure gauges on in water one in the air some oneway valves and charge it till it blew anybet there would be the same amount of force and pressure readin on BOTH guages there most probably would be an even amount damage to the pipe.
Ahh that feels better.