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]<mailto:[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]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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