This is good. You have to use the manufacturer's wrench AND it has to be torqued to a specific amount. Robot fitters with calibrated arms?
On Sat, Feb 7, 2009 at 3:24 PM, Jay Jay Blocker <[email protected]> wrote: > I totally agree Dave but there is actually a line of text which hurts us > here. I did some extensive research one time into trying to figure out why 7 > lbs of torque was the requirement for tightness. I was trying to figure out > if that was actually too much torque for plastic rc's compared to carbon > steel. During this venture i found a small line in some manufacture > recommendation's that states a torque wrench is to be used to verify that no > more and no less than 7 lbs of torque is acquired. It had to be written in > there by some insurance guy that doesn't do sprinklers but none the less it > is there. I will look back through my files and see if i can locate it and > share with the rest of the forum. > > Jeremy S. Blocker > > Let us not look back in anger, nor forward in fear, but around in > awareness. --James Thurber > > > > > ________________________________ > From: David de Vries <[email protected]> > To: [email protected] > Sent: Saturday, February 7, 2009 1:04:38 PM > Subject: Re: Bedbug Treatment > > Todd: > > This is a very good question that warrants further consideration. Looking > back into earlier editions of 13 (like the 50's), there was a prohibition > against installing used sprinklers.. Now the text says only new sprinklers > shall be installed. I think there is a difference in meaning. > > I can easily understand a case against buying used sprinklers at a garage > sale, not knowing anything whatsoever about their history (like storage or > installation close to their operating temp), and then relying on those > sprinklers to operate when they are supposed to, and not operate when they > are not supposed to. But where you install new sprinklers, then remove them > temporarily for reconfiguring a ceiling or treating a room at elevated temps > for bedbugs, I do not see the same problem. The installer knew they were > new, not used when first installed, and only he handled those sprinklers > since then. > > I have heard it said that torquing a sprinkler into place, removing it which > relaxes the stress on the body and then reinstalling it, will cause damage. > I have never seen any scientific studies that confirm that. If this were > seriously an issue, would there not be a mfr's requirement to use a > calibrated torque wrench for installing sprinklers so that they are not over- > (or under-) tightened? > > There may be a separate issue for sprinklers with QR glass bulbs which seem > to be temperamental guys, but as a temporary installation in the bedbug > situation, I could see using standard response sprinklers, even though QR/res > sprinklers are required for the finished hotel. > > Dave > > David A. de Vries, P.E., CSP > Firetech Engineering Incorporated > 2715 Harrison St. > Evanston, IL 60201 > Tel: 847-733-0944 > Fax: 847-866-6255 > > > > --- On Fri, 2/6/09, Todd Williams <[email protected]> wrote: > > From: Todd Williams <[email protected]> > Subject: Re: Bedbug Treatment > To: [email protected] > Date: Friday, February 6, 2009, 1:04 PM > > If you read the commentary in the Handbook (NFPA 13-2002) under > section 6.1.2.2, that seems to open up the idea of removing and > replacing sprinklers in limited applications, to which this might > apply. Also, if you remove the sprig/drop/arm over and replace it, > but do not touch the sprinkler, would that be legal? > > I wonder what the "bad experiences" have been had with reconditioned > sprinklers. What kind of reconditioning did they use? > > At 01:05 PM 2/6/2009, you wrote: >>I know what the code says but it seems wasteful to use these heads >>for 24 hours and then throw them away. I got the feeling that the >>profit margin on this job was pretty slim already. >>As far as firewatches go, having to rely on hotel staff for this >>does not make me feel confident at all. Especially when the >>management wants this all done quickly and quietly.(hush-hush) >> >> >>----- Original Message ----- From: "Paul Pinigis" > <[email protected]> >>To: <[email protected]> >>Sent: Friday, February 06, 2009 11:40 AM >>Subject: RE: * Possible Spam *Bedbug Treatment >> >> >>Installing intermediate temperature sprinklers seems like the most >>sensible approach, but you could not reinstall them elsewhere because >>they are now "used". >> >>Paul Pinigis, P.E. >>Life Safety Department Head >> >> >> >>-----Original Message----- >>From: [email protected] >>[mailto:[email protected]] On Behalf Of Thomas >>Watt >>Sent: Friday, February 06, 2009 8:21 AM >>To: [email protected] >>Subject: * Possible Spam *Bedbug Treatment >> >>Hello group, >> >>Several months ago I was sent to remove the (12)sprinklers from a hotel >>room so that it could be heat treated for a bedbug infestation. This >>process involves heating the room to over 130 degrees. My instructions >>were to remove the sprinklers and replace with nipple/caps until the >>next day when the sprinklers could be replaced. >> >>I know in many cases the heating equipment is truck mounted and the >>heating ducts are stretched into the unit to be treated. In this case, >>the heater/blowers were all portable units. In retrospect, with all of >>these appliances in this unprotected space in an occupied wing of this >>hotel, this was a catastrophe waiting to happen. >> >>1) Could I have replaced the 155* heads with intermediate temp heads? >>2) Could I reuse these heads for the next bedbug job? >> >>_______________________________________________ >>Sprinklerforum mailing list >>http://lists.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 >>http://lists.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) >> >> >>-------------------------------------------------------------------------------- >> >> >> >>Internal Virus Database is out of date. >>Checked by AVG - http://www.avg.com >>Version: 8.0.233 / Virus Database: 270.10.16/1930 - Release Date: >>2/2/2009 7:51 AM >> >>_______________________________________________ >>Sprinklerforum mailing list >>http://lists.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 > http://lists.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 > http://lists.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 > http://lists.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) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list http://lists.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)
