Vince, I believe it was Liberty Mutual that spent a lot of time and money to try to determine some correlation between water supply and 2" drain tests (using one of their more experienced FPEs). The bottom line result was that their isn't any reliable way of determining matching the two. If you did a calc with the 10 y.o. test and left a 70 psi cushion, you probably would be good when "asap" finally arrives.
At 11:57 AM 10/12/2009, you wrote: >I just sent this privately... and realize that I should say it >publicly because my original request >didn't present my real problem.... > >My problem is this: > >I have a job that must be installed last week. > >I have a 140 psi water supply with good residual as evidenced by 120 >psi on a full open 2" drain. > >I have the last municiple flow test about ten years old that confirms >that good water supply. >The city will do a new flow test "asap". > > > > >The plan reviewer said that I'm being too "thorough" in doing calcs >on this .20 retrofit, that I should just >use the 'stuff on the riser'. Since my system's demand will remain >constant, I was looking for a way to 'bridge" >the flow data that I do have with 'the stuff on the riser'. > >I have a copy of compiled drain tests that was used by a company >called Starr Technical Risks Agency >in the US and Canada but it only goes to 55 psi. I though maybe >someone have something with higher pressures. > >I wouldn't ever rely on a 2" flow unless that was all that was >available - and the demand would have to be well below >the supply curve with a written understanding. > >I hope this makes more sense to you. > > > > >Vince > > > > > > > >At 11:15 AM 10/12/2009, you wrote: > >Haven't had the error, but we've done flow tests on 2" drains. > > > >Since the length of piping and # of fittings can vary on each main drain, > >the discharge for each pressure point is VARIABLE. > > > >However, what we've done to quickly get a flow test when we have a small > >demand is to place a hose monster on the main drain discharge and MEASURE > >the flow. Quick, easy, and accurate- no water co impact like 10 PM flow > >tests and $500, since essentially we're performing a 2" main drain test > >which doesn't require payment, water co crew, etc. > > > >But, No, I don't think you can say we have 100 PSI supply, reduced to 75 > >with the 2" drain, that means you're flowing x GPM. > > > >Going back to the server issue, it may be an increase in use with the IRC > >hearing coming up, or convention-related high usage of attempted access. To > >top it off, Roger is likely flying out to SD today to help set up their > >infrastructure. > > > >Godspeed, AFSA staff and others heading west- see ya there! > > > >glc > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Vince Sabolik > >Sent: Monday, October 12, 2009 11:02 AM > >To: [email protected] > >Subject: > > > > > > > >Good morning, folks -- > > > >I keep getting this error when I try to sign in and access member stuff: > >Error Occurred While Processing Request > > > >Is this a server problem ... > > > >AND > > > >Does anyone have reference tables for discharge flow vs psi on > >a 2" main drain test? > > > > > >thanks, > >Vince > > > >Vince Sabolik > >Christi Fire Protection, Inc. > >11351 Pearl Road > >Strongsville, Ohio 44136 > > > >T 440 572-7730 F 440 572-7719 Email: > ><mailto:[email protected]>[email protected] > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > >For Technical Assistance, send an email to: [email protected] > > > >To Unsubscribe, send an email to:[email protected] > >(Put the word unsubscribe in the subject field) > > > >_______________________________________________ > >Sprinklerforum mailing list > >[email protected] > >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > >For Technical Assistance, send an email to: [email protected] > > > >To Unsubscribe, send an email to:[email protected] > >(Put the word unsubscribe in the subject field) > >Vince Sabolik >Christi Fire Protection, Inc. >11351 Pearl Road >Strongsville, Ohio 44136 > >T 440 572-7730 F 440 572-7719 Email: ><mailto:[email protected]>[email protected] > >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >For Technical Assistance, send an email to: [email protected] > >To Unsubscribe, send an email to:[email protected] >(Put the word unsubscribe in the subject field) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
