Air compressor to fill 3.5 cubic metres to 100kPa in 5 mins
Air compressor to fill 3.5 cubic metres to 100kPa in 5 mins
(OP)
Hello,
After repair work to fire protection pipe work we would like our techs to use a portable compressor to pressure test the system with about 100kPa of air before re-charging with water. It should be a quick indicator of ends accidently left open and large audible leaks.
The pipe work installations are around 3.5 cubic meters(120 cubic feet) in volume. Using a standard workshop compressor it takes too long. Is there a single phase compressor more suitable for this application that could get to about 100kPa in about 5 minutes or less?
After repair work to fire protection pipe work we would like our techs to use a portable compressor to pressure test the system with about 100kPa of air before re-charging with water. It should be a quick indicator of ends accidently left open and large audible leaks.
The pipe work installations are around 3.5 cubic meters(120 cubic feet) in volume. Using a standard workshop compressor it takes too long. Is there a single phase compressor more suitable for this application that could get to about 100kPa in about 5 minutes or less?





RE: Air compressor to fill 3.5 cubic metres to 100kPa in 5 mins
Second, NFPA 13, 10.10.2.2.1 states that the entire system shall be hydrostatically tested to 200 psi for 2 hrs.
If cold weather prevents a hydrostatic test, 24.2.2 allows a interim air test, but the hydrostatic test is still eventually required.
I recommend checking with the local AHJ about this "test".
RE: Air compressor to fill 3.5 cubic metres to 100kPa in 5 mins
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Is but one of many pumpup calculators for compressed air.
RE: Air compressor to fill 3.5 cubic metres to 100kPa in 5 mins
http://virtualpipeline.spaces.msn.com
"What gets us into trouble is not what we don't know, its what we know for sure" - Mark Twain
RE: Air compressor to fill 3.5 cubic metres to 100kPa in 5 mins
Yes, it is a licenced fire protection service company doing the work.
TenPenny,
Thanks, I did search for a simple online calculator before posting with no luck. Unfortunately I dont have the required excel applet so your's dosnt work for me. Do you have another? I'd like to play with the numbers to get that time down.
Biginch,
Pre compressed air, a top idea. With that in mind...
Say my cylinder is .03 cubic meter volume and it was pre compressed to 1000kPa. If I connect it to the insallation which is 3.5 cubic meters (atmospheric pressure) what is the resulting pressure?
or better yet, if anyone could point me to the relevant formula...
RE: Air compressor to fill 3.5 cubic metres to 100kPa in 5 mins
check this table. Shows what pressures you need for a 1 m3 tank volume.
http://www.cp-industries.com/Compressability.htm
You'll need something about the size of 1.5 std scuba tanks (they're usually somewhere around 130-150 Barg)
Here's some more tank ideas, htt
http://virtualpipeline.spaces.msn.com
"What gets us into trouble is not what we don't know, its what we know for sure" - Mark Twain