This is just my take on the flexibility of CPVC, as described in blaze master lit. The CPVC is not so rigid that the differential motion of the piping and the structure will cause it to fail or break as easily as a steel pipe or copper system. (So a Non-Specific value judgment. How much? What force EQ? 3.2?? 7.4?? At what point does that "resistance" no longer proved enough flexibility to protect the system integrity.)
But you asking about Seismic separations. Seismic separations allow two or more portions of large structures to act as independent structures and move differentially to each other. While the flexibility of CPVC may provide sufficient motion adaptability and move differentially to the structure, to allow it to survive inside of a structure. What happens when it spans TWO structures moving differentially to each other. A seismic separation works like the air space between two sky scrapers. Will the CPVC provide enough flexibility when those two structures move in opposite directions? I think not, and that is why a seismic separation still need to be addressed even in CPVC systems. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bob Sent: Thursday, October 20, 2011 4:34 PM To: [email protected] Subject: RE: Seismic Separation Assembly I'll try to answer my own question in part. 13, 9.3.3.2 states, "shall consist of flexible fittings or flexible piping". Under the Advantages heading Blazemaster states " Flexibility in the piping for greater ease of installation" and "Greater resistance to seismic activity than copper or steel systems". Based on this it seems to me that the expansion loop would suffice. Can anyone back this up or demonstrate why it's incorrect? Thanks, Bob Knight, CET III 208-318-3057 www.firebyknight.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bob Sent: Thursday, October 20, 2011 1:09 PM To: [email protected] Subject: Seismic Separation Assembly In regard to seismic separation assemblies, are they required for CPVC piping? If they are, does the expansion loop that blazemaster requires satisfy the requirement? Thanks, Bob Knight, CET III 208-318-3057 www.firebyknight.com _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
