I say it's fine if you have drain valves at the end of each line and transition to pvc after the valve. But that may be expensive.
So I say pvc is ok after the drain valve. But is that practical? On Fri, Mar 30, 2018 at 4:59 PM, Scott Futrell <[email protected]> wrote: > A Friday afternoon conundrum for the group. > > > > I have a client with corrosion issues in several wet, twenty year old, > ESFR, warehouse systems. These are center-fed systems. Yes, center-fed. > So all of the branchlines are dead ends. Corrosion scale and sludge is > pushed into the ends of the lines. Flushing will be done. End of the day > though the client wants to add a tie-in drain line connecting all the ends > of all the lines to drain/flush in the future. It has been suggested that > schedule 40 PVC might be used for these tie-in drains. > > > > My response so far: > > > > *Practically, plastic should be okay.* > > > > *But, it would not be recognized in NFPA 13. Also, because it could fail > in a fire, and we would expect high challenge fires in warehouses filled > with combustibles like pallets and plastics, if it failed before the > sprinklers operated, or before they were winning the battle you would have > a potential system failure. Chances are probably remote, but they would > exist with the right (wrong) conditions.* > > > > *I would expect that a knowledgeable inspector would question the > installation at least.* > > > > *I wouldn’t specify it, but schedule 40 PVC might be an option for what > you are trying to accomplish cost-effectively.* > > > > What say ye all? > > > > Scott Futrell > > Office: (763) 425-1001 x 2 > > Cell: (612) 759-5556 > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > >
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