No just wants 3 threads showing if 150 PSI 5 threads if more. We normally use NBK that comes with the fittings. The are marked with the ANSI marks. Never had any work loose. Even on diesel pumps that do get run like the should. I have complied with his request. If it exist I would like to find it before him.
Thank you, Andy Johnston On May 13, 2013, at 8:57 PM, Phong - Indochine Engineering <[email protected]> wrote: > One size of the nut thickness? > > Regards, > Le Vu Phong > Mobile: +84 (0) 902 363 525 > > > > > > > phong_indochineengineering > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of John > O'Connor > Sent: Tuesday, May 14, 2013 3:34 AM > To: [email protected] > Subject: RE: Exposed threads > > Andy, > I have never seen anything in writing about the number of exposed threads of > a bolt thru the nut. However, I used to be an aircraft mechanic in the Navy, > and we had a rule of two exposed threads. We lived by that rule, where it > came from we never questioned. It worked in conditions of vibrations that a > fire pump would never experience. Probably came from some design engineer in > the third basement of Boeing during WWII. It is amazing how some rules get > hatched and live forever, only to be expanded upon as if the original came > down from Mt. Sinai. > John O'Connor > National Fire Sprinklers, Inc. > Nashville TN > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Andy > Sent: Monday, May 13, 2013 3:05 PM > To: [email protected] > Subject: Exposed threads > > > I was told that bolts on a fire pump must have 3 threads showing on the bolt > side I complied and then was told I must have 5 exposed threads because it > will operate above 150 PSI I complied but I did ask were to find that. I love > code trivia I was told its some were in the ASME codes that are referenced In > front of NFPA 20. I do not have a copy of these. I pleats try to meet the FM > request But..... > > > Thank you, in advance. > Andy Johnston > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1432 / Virus Database: 3162/5820 - Release Date: 05/13/13 > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
