Thanks for everyone's input. Ray Schmid
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ron Greenman Sent: Wednesday, April 04, 2007 7:19 PM To: [email protected] Subject: Re: Hydrostatic vs. Pneumatic Testing Except when a fitting let's loose or the pipe splits with air you have an explosion as the entire volume of compressed gas decompresses outward into the lower pressure atmosphere. When a liquid decompresses you have the pressure put against the end of the column rapidly diissapate and the large volume of non-compressable liquid just splurts (splurt: kinda like slobbering). Broken pieces are not propelled away from the rupture like bullets. On 4/4/07, Chris Brown <[EMAIL PROTECTED]> wrote: > PSI is PSI no matter what your dealing with. > > > Thank you, > > Chris Brown > Fire Protection Designer, Poole Fire Protection > Office: 913.829.8650 Direct: 913.747.2056 Cell: 913.208.3600 Fax: > 913.829.8690 > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > [EMAIL PROTECTED] > Sent: Wednesday, April 04, 2007 3:33 PM > To: [email protected] > Subject: RE: Hydrostatic vs. Pneumatic Testing > > 200psi of air pressure is not the same as 200psi of water pressure due > to the compressibility of air versus water. We never did more than > 50psi for an air test for sensitive areas. If it passed the air test at > 50# we never had any issues with the 200# water test. > > > Craig L. Prahl, CET > Fire Protection Group > Mechanical Department > CH2MHILL > Lockwood Greene > 1500 International Drive > PO Box 491, Spartanburg, SC 29304-0491 > Direct - 864.599.4102 > Fax - 864.599.8439 > [EMAIL PROTECTED] > http://www.lg.com > > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Ray > Schmid > Sent: Wednesday, April 04, 2007 3:46 PM > To: [email protected] > Subject: Hydrostatic vs. Pneumatic Testing > > I have a client that needs to have a hydro performed for a modified PA > system over a live data center and they are naturally concerned with > conducting a traditional hydro above $500M worth of servers. The 40# > air test has been successfully completed and they are questioning why a > similar test with air at a higher pressure could not be done as an > alternative to a hydro. Assuming a constant temperature throughout the > test, why would a 200 psi test using air not be equivalent to the > traditional hydro that uses water? It seems the requirement for a hydro > is as old as piping itself, but all I can tell them at this point is > that the standard requires a 200# test with water. Not a very technical > justification. Are there tangible benefits to pressure testing the > system with water that would not be realized with a pneumatic test? > > > > Ray Schmid, P.E. > > Principal > > Koffel Associates, Inc. > > 410-750-2246 > > www.koffel.com <http://www.koffel.com/> > > > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
