Following up on the original question, 2019 Edition of NFPA 13 specifically states that listed piping material other than that covered in the table shall be hydraulically calculated (27.5.1.2). So that puts the nail in that coffin.
For the bonus question, I haven't found anything specifically addressing this in the code. If you were doing a density/area calculation, then the small room rule wouldn't necessarily increase the flow/pressure required at a sprinkler 9 feet from the wall, so I would think that it would still be allowed using pipe schedule method. At least, I think you could reason with someone about it. I don't think that would be the same as, say, trying to use extended coverage sprinklers. -Kyle M Aero From: Ed Kramer <[email protected]> Sent: Wednesday, May 14, 2025 9:41 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [External][Sprinklerforum] Re: CPVC and pipe scheduled systems Excellent point. Thank you Todd & Kyle. So now on to the bonus round: On a pipe schedule system, can section 10.2.5.2.3.1 (2019) be applied to allow a sprinkler to be up to 9' from a single wall? Ed From: Fpdcdesign <[email protected]<mailto:[email protected]>> Sent: Wednesday, May 14, 2025 6:50 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: CPVC and pipe scheduled systems In 13, the pipe schedule tables are specified for steel or copper only. 27.5.3.4 Todd Williams Fire Protection Design/Consulting Stonington, CT 860-608-4559 On May 13, 2025 at 5:30 PM, <Ed Kramer<mailto:[email protected]>> wrote: Oh knowledgeable ones: Is there anything in NFPA 13 that prohibits the use of CPVC pipe/fittings in the remodel of an old pipe schedule system? The intent is to maintain the pipe schedule and not provide calculations. I'm not aware of anything, but I don't want this to bite me later. Thanks, Ed K [https://www.dropbox.com/s/g4h8r7hdtsr6154/AFSA_L.png?raw=1] [cid:[email protected]] Ed Kramer Design Manager | Bamford Fire Sprinkler Co., Inc. P: 785.825.7710 F: 785.825.0667 M: 785.766.4894 A: 1383 W. North Street Salina, KS 67401 _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]<mailto:[email protected]>
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