Hello everyone! We are designing an expansion project for an Plastic A Unexpanded Exposed or UUP with racks warehouse. Design specification is 12K25.2 @ 60 psi + 250 gpm x 60 minutes. The existing pump is 2,000 gpm @ 120 psi, and an existing underground schedule 40 steel network is more than 10 years old. We are using a factor C=100.
The above gives us 4" branch lines, 8" mains and a 10" riser, using 3 mains and it gives us the curve, but we need to lower the pipe diameters. We have never seen a 10" riser. We know that the problem lies in the capacity of the fire pump, and the client wants to save as much as possible and reduce the risk due to the structural load. Our question is, can we have a grid sprinkler system with 2 risers of 8" that feed it? We can't find anything in NFPA or FM Global standards that prevents this, but at the same time I've never seen a system like this installed. Greetings and we look forward to comments. -- Gerzayn Fuentes Campos / director general [email protected] México. www.koltek.mx -- <https://expofire.ownersys.com/registro> _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]
