You will be able to tell this question is based on minimum software application experience, but does current software automatically determine “most demanding”? Or, is it up to the human operator to guess where this area might be? If it’s a guess, how do you know you have chosen correctly?
Bill Brooks From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Tuesday, August 30, 2016 10:40 AM To: [email protected] Subject: RE: Flexheads in small renovation To underscore John’s point, these fittings impose with a SUBSTANTIAL pressure loss. As 3rd party, we would ask for calculations to prove the performance of the revised configuration. SL From: Sprinklerforum [mailto:[email protected]] On Behalf Of Michael Hill Sent: Tuesday, August 30, 2016 6:11 AM To: [email protected] <mailto:[email protected]> Subject: RE: Flexheads in small renovation I agree with Richard, it needs to be evaluated. It is known that flex piping is generally more demanding than their hard piped counterparts. If the base building design did not include flex piping, I would look at it as a change to base building design and perform a quick calculation to see how it looks. I assume they didn’t use excessively long flex pipe with more bends or lops than were needed. Mike Hill From: Sprinklerforum [mailto:[email protected]] On Behalf Of Todd Williams Sent: Tuesday, August 30, 2016 8:39 AM To: [email protected] <mailto:[email protected]> Subject: RE: Flexheads in small renovation This is a single story building. Multiple looped 4" and 3" cross mains with branches to wings. (Think nursing home with interior court yards). No fire pump. 100 psi static with a flat curve (2 year old test, DeltaE = 0). Area in question not most hydraulically remote but toward that end of the building. Branch lines are fed from the loop, not a DE branch main. LH occupancy. I am not worried about this not being adequate, more a consensus of what needs to be done and what is correct. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-608-4559 (cell) Sent using CloudMagic <https://cloudmagic.com/k/d/mailapp?ct=ti&cv=6.0.64&pv=8.2> On Tue, Aug 30, 2016 at 8:22 AM, Richard Carr <[email protected] <mailto:[email protected]> > wrote: I can’t disagree with John (Hi John) but we need more info to make the call, In remote area? Fire pump? What is safety margin on existing? What is friction loss on the flex? Just because you add 4 flex piping to an existing system does not require it to be calculated. But does need to be evaluated. Richard Carr, SET Branch Manager Cox Fire Protection, Inc 6555 Grace Lane. Jacksonville, Fl. 32205 [email protected] <mailto:[email protected]> 904-781-8227 From: Sprinklerforum [mailto:[email protected]] On Behalf Of John Irwin Sent: Tuesday, August 30, 2016 7:14 AM To: [email protected] <mailto:[email protected]> Subject: RE: Flexheads in small renovation I disagree with Richard. (Hi Richard!) Relocating these sprinklers with flex heads may very well change the location of the most hydraulically remote area to the place you are working. Flex-heads come with a substantial pressure loss. Even if doing calculations wasn’t required, I would want to do them for myself for peace of mind. My belief has always been that you can’t tax the system without verifying that it still works. John Irwin Manger – Fire Sprinkler Division Critical System Solutions, LLC Cell: 813.618.2781 Email: [email protected] <mailto:[email protected]> From: Sprinklerforum [mailto:[email protected]] On Behalf Of Richard Carr Sent: Tuesday, August 30, 2016 7:08 AM To: [email protected] <mailto:[email protected]> Subject: RE: Flexheads in small renovation Are the relocates in the remote area? if not I would not calc. also , some flex brands are better that others as far as friction loss. Richard Carr, SET Branch Manager Cox Fire Protection, Inc 6555 Grace Lane. Jacksonville, Fl. 32205 [email protected] <mailto:[email protected]> 904-781-8227 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Todd Williams Sent: Tuesday, August 30, 2016 6:30 AM To: [email protected] <mailto:[email protected]> Subject: Flexheads in small renovation I have a client that did a 4 sprinkler relocate job in an office and used Flexheads (no sprinklers added). If the sprinklers were connected with hard pipe, I would probably not do hydraulic calculations. Given that we have FHs, should I be doing a full 900 or 1500 sqft calculation? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-608-4559 (cell) Sent using CloudMagic <https://cloudmagic.com/k/d/mailapp?ct=ti&cv=6.0.64&pv=8.2>
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