I'd ask the manufacturer what their position is. Best.
> On Dec 16, 2016, at 11:08, <[email protected]> <[email protected]> > wrote: > > Good information, do you have any forensic statistics on these failures that > would give an indication of the cause of the failure? Improper installation, > rust/corrosion, produce defect? > Mark at Aero > 602 820-7894 > > > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Top Myers > Sent: Friday, December 16, 2016 11:44 AM > To: [email protected] > Subject: RE: Use of Set Screw Type Restraint Fire Pump Suction and Discharge > > Over the years, we have had a number of Uniflange claims. Same with some of > their competitors which are import. The rating of 25,000 is based on perfect > conditions and when installed in front of system with water flow upstream the > water often runs for a long time before noticed. I support Dan Arnolds > observation. > > Top Myers > Myers Risk Services > 2102 Kimberton Road, Unit 741 > Kimberton, PA 19442 > (484) 924-8155 Cell 610-952-0965 > [email protected] > > Providing Solutions For Your Risk Management Needs > > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Daniel Arnold > Sent: Friday, December 16, 2016 11:48 AM > To: [email protected] > Subject: RE: Use of Set Screw Type Restraint Fire Pump Suction and Discharge > > Bill: > > I have seen separations of these style flanges in situations as you describe > and others. Personally, I do not spec/use them without rods but there are > many, many out there. > > (Did not sign my prior post…. Apologies,) > > Dan Arnold > Seneca Fire Engineering, LLC > > > > On Dec 16, 2016, at 8:30 AM, "[email protected]" <[email protected]> > wrote: > > Hi Bill, > If you look up the technical data sheet on a "Uniflange" you'll find that > this device has a rated holding strength in the 25,000 pound range based on > the pipe diameter. They are commonly used out here in the Wild West. We have > never seen a failure on a properly installed device. > > Mark at Aero > 602 820-7894 > > Sent from my iPhone > > On Dec 16, 2016, at 6:20 AM, Bill Brooks <[email protected]> wrote: > > A case came up today about the use of a “mechanical joint wedge action > restraint” on the suction and discharge side of a diesel driven pump. > Someone accepted a change and eliminated the rods, then put a MJWAC at the > top of the ductile pipe on each side of the pump. A commissioning agent has > refused to start the pump based on the concern the restraint will “wiggle” > off the end of the ductile under repeated pump operation either during the > acceptance test or sometime later. > > Is this a creative use of this type restraint, or is it a totally bad idea? > By the way, the underground elbow is a restrained type mechanical joint. > > Thanks > > Bill Brooks > Brooks Fire Protection Engineering Inc. > _______________________________________________ > 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
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