Mike, There are different variables that could explain why you have had multiple corrosion failures on one (1) system and not the other eight (8) in the building:
* Is there machinery or process equipment beneath the failing system? Corrosion is accelerated by higher temperatures. * Has the failing system been renovated or modified more regularly than the other systems? Corrosion is accelerated by more frequent system activity - drain and re-fills. * Does the failing system have more elevation changes than the other systems? More trapped air pockets in the system can lead to faster corrosion failures. As I mentioned, system activity can have a big impact on corrosion rates. The simple act of taking a system out of service and replacing damaged pipe can add enough fresh oxygen to cause your next leak. So the other eight systems could have experienced some corrosion problems as well, but have not yet reached a point of failure. Meanwhile the corrosion reaction in the failing system continues to be fueled as you are forced to repair it. Thanks, Lucas Kirn, PE Engineered Corrosion Solutions (314) 415-1387 | http://ecscorrosion.com From: Mike Hairfield [mailto:fsl...@msn.com] Sent: Wednesday, December 20, 2017 4:30 PM To: sprinklerforum@lists.firesprinkler.org Subject: Re: Corrosion Trying to explain to the owner why it's happened seven (7) times on the same system has been a problem. ________________________________ From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org<mailto:sprinklerforum-boun...@lists.firesprinkler.org>> on behalf of Ron Greenman <rongreen...@gmail.com<mailto:rongreen...@gmail.com>> Sent: Wednesday, December 20, 2017 5:22 PM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Subject: Re: Corrosion Yes, And on the same first section of a 4" bulk main immediately following the rise, and after that piece had been replaced. At no more the four feet away from it's reflected twin riser coming off the same manifold. And then never again anywhere. and it was a tree, not a grid. On Wed, Dec 20, 2017 at 2:13 PM, Scott Futrell <sco...@ffcdi.com<mailto:sco...@ffcdi.com>> wrote: I know you can't do dry gridded, but people do. So assuming it is wet, yes. Scott Office: (763) 425-1001 x 2<tel:(763)%20425-1001> Cell: (612) 759-5556<tel:(612)%20759-5556> From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org<mailto:sprinklerforum-boun...@lists.firesprinkler.org>] On Behalf Of Scott Futrell Sent: Wednesday, December 20, 2017 4:12 PM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Subject: RE: Corrosion This sender failed our fraud detection checks and may not be who they appear to be. Learn about spoofing<http://aka.ms/LearnAboutSpoofing> Feedback<http://aka.ms/SafetyTipsFeedback> Wet or dry? Scott Office: (763) 425-1001 x 2<tel:(763)%20425-1001> Cell: (612) 759-5556<tel:(612)%20759-5556> From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Mike Hairfield Sent: Wednesday, December 20, 2017 4:11 PM To: Sprinkler Forum <sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org>> Subject: Corrosion Has anyone experienced a situation where one (1) of multiple gridded sprinkler systems is the only one that is having corrosion issues? There are nine (9) systems in this building. Mike _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org<mailto:Sprinklerforum@lists.firesprinkler.org> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org -- Ron Greenman rongreen...@gmail.com<mailto:rongreen...@gmail.com> 253.576.9700 The Universe is monstrously indifferent to the presence of man. -Werner Herzog, screenwriter, film director, author, actor and opera director (1942-)
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