Ron, I think he is talking about the "Joint Ease" that we all use on groove couplings. I have seen this many times, normally when you refill a system, or when the couplings have been moved some. The gasket in the coupling expands and squeezes out some of the "Grease" <- field term for the stuff. It is actually a type of soap, and most use it to wash their hands at the end of the day), and it causes small air bubbles around the perimeter of the coupling. They look like ones you would see when using liquid soap to look for a leak, only smaller. I have never seen an actual "leak" that drips or is cause for further investigation, only the little bubbles, and that normally stops when the gasket has fully expanded.
R/ Matt Matthew J. Willis, CET Automatic Fire Sprinklers Norred Fire Systems L.L.C. 318-387-1134 Voice 318-387-1163 Facsimile [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ron Greenman Sent: Monday, July 13, 2009 9:29 AM To: [email protected] Subject: Re: Lubricant Foaming Questions: Dry systems or wet? If dry system what type of seals? Can you identify the lubricant (i.e.: vegetable shortening, manufacturer's recommended product, petroleum based product)? Actually foaming (i.e.: expanding and looking like shaving cream or a slightly more aerated product from an aerosol can)? Is there just an over abundance of lubricant at the joints/ Is it dripping? Does it occur all year or only during warmer days? On Mon, Jul 13, 2009 at 7:15 AM, Thomas Watt<[email protected]> wrote: > I believe I am the only one who received this so I have forwarded it after stripping the pics. Anyone who would like to see them, just speak up. > > Thomas Watt > > > > Confraterrille EXPERTS > > > > I am looking for a technical (scientific) article that the following event describes. > > > > 1 year after the placement of a wet sprinkler installation, the lubricant used to place rigid couplings, is foaming out of the coupling. See pictures in annex. > > I think that I found the cause of this, the use of too much lubricant during the installation and the (small) movements of piping during the live cycle, but I am still looking for a good text that describes the problem and the cause on a more scientific way. > > > > I hope some of you can help me out on this. > > > > Thank you in advance > > > > Giedo Van pellicom > > Expert Witness for Belgium Court > > 2880 Bornem > > Belgium > > +32.38.89.26.84 (office) > > +32.475.49.83.85 (mobile) > _______________________________________________ > 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 Instructor Fire Protection Engineering Bates Technical College Tacoma, WA Member: SFPE, ASCET, NFPA, AFSA, NFSA AFAA _______________________________________________ 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)
