If we’re talking “hard pipe” portion of the arm over, we stick with the 2’ <100 1’ >100 rule for that pipe and where feasible use the longest flex possible/reasonably priced vs just adding a hung section.
Mike Morey CFPS 3229 • NICET S.E.T. 123677 Project Manager • Fire Protection Group Shambaugh & Son, LP an EMCOR Company 7614 Opportunity Drive • Fort Wayne, IN • 46825 direct 260.487.7824 / cell 260.417.0625 / fax 260.487.7991 email [email protected] [cid:[email protected]] From: [email protected] <[email protected]> Sent: Thursday, May 11, 2023 12:41 PM To: [email protected] Subject: [Sprinklerforum] Flex Drops in excess of 100psi Having an internal discussion, and the thought came up. . , Are there any discussions or considerations on the reduced arm over length when pressure is above 100psi? In other words, since the common flex fittings are rated to 175psi in a bracket, ZjQcmQRYFpfptBannerStart Be Careful With This Message The sender's identity could not be verified and someone may be impersonating the sender. ZjQcmQRYFpfptBannerEnd Having an internal discussion, and the thought came up.., Are there any discussions or considerations on the reduced arm over length when pressure is above 100psi? In other words, since the common flex fittings are rated to 175psi in a bracket, attached to a ceiling assembly, can we go to 36” for 1” with more than 100psi at the sprinkler? I know as written you cannot. But was wondering if this had been brought up. R/ Matt This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient.
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