Never seen it applied to an NFPA document, but I have heard referenced a document called DIN 78 EN-Bolt end protrusions?
Jamey -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Andy Sent: Monday, May 13, 2013 4:48 PM To: [email protected] Subject: Re: Exposed threads He is good natured FM I don't have a problem complying, but I did offer him 50 bucks for copy of the code. Thank you, Andy Johnston On May 13, 2013, at 4:34 PM, "John O'Connor" <[email protected]> wrote: > 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-firesprinkl > er.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-firesprinkl > er.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
