I do not believe one is sufficient. I recall a project where the specification limited the maximum number of exposed threads to 2 or 3. I'd have to do some research to find the product/installation standard that was referenced.
Kevin Hall, M.Eng., P.E., ET, CWBSP, PMSFPE Coordinator, Engineering and Technical Services American Fire Sprinkler Association [email protected] 214-349-5971 On Wed, Jan 5, 2022 at 2:16 AM Dan Arbel via Sprinklerforum < [email protected]> wrote: > Dear Forum Members > > I have a case where 1.25" NPT pipe nipple was connected to 1.25" BSP (as > per British standard) pipe. > > Sprinkler System in interstitial space. > > There was only 2 threads engagement. > > After about 15 years somebody touched the a pipe and the connection > disengaged. > > I would appreciated the members opinion on the allegation that even one > thread engagement is sufficient providing sufficient strength. > > Dan Arbel > Dan Arbel Risk Engineering Ltd > Mail: [email protected] > WEB SITE: www.riskmanage.com > Mobile: +972-52-6611337 > Tel: +972-4-8243337 > _______________________________________________ > 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
