NFPA 20 2013: 4.13.2.1 Sections of steel piping shall be joined by means of screwed, flanged mechanical grooved joints or other approved fittings. NFPA 24 2013 10.3.3 Groove Joining Methods. Pipes joined with grooved fittings shall be joined by a listed combination of fittings, gaskets, and grooves.
I looked all the way back to NFPA 20 1990 and found a similar wording. If anything, I'd say the OS&Y is typically flanged as its the most common configuration to get the valve in, and its typically bolted directly to a flanged increaser? I think this is mostly a "how we've always done it" situation. The views, opinions and judgements expressed in this message are solely those of the author. The message contents have not been revewed or approved by S&S Mike Morey Project Manager • Fire Protection 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] From: IPA <[email protected]> To: [email protected] Date: 12/15/2016 12:32 AM Subject: NFPA 20 & Suction Flanges Sent by: "Sprinklerforum" <[email protected]> I might be going crazy but I thought there was a requirement for something in the fire pump suction line to have flanged fittings... perhaps the OS&Y? I can't find anything like that now that I"m looking for it and I do see a general requirement that the fittings can be screwed, flanged or mechanically grooved. Is there such a requirement or was there ever one for flanged fittings? _______________________________________________ Sprinklerforum mailing list [email protected] https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DgICAg&c=GKdB6-XpYq_0W-WluyVHtw&r=z4t2hrRBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m=IKmbVraL9UonubDnjpAZI3-cVPX2NSTGwOnmYzfO3io&s=lwe801zss2zRrUfljknUOG87eqj44sYEx5644DrVJHM&e= 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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