If your main concern is the temperature note the term “nominal” which means “stated or expressed but not necessarily corresponding exactly to the real value”. Typically you’d see heads ranging from 155-165 depending on design that would all be considered interchangeable for the purposes of that requirement. 23.4.4 refers to ceiling sprinklers for a particular application. If FM is your primary concern they make no differentiation between “ESFR” and other storage type heads, they’re only concerned with the orifice size/k factor of the head.
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: Phong - Indochine Engineering <[email protected]> Sent: Tuesday, April 18, 2023 3:12 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] FM approved in-rack sprinkler head Dear All, I am having a problem when choosing in-rack sprinkler head with FM approved, and having the right temperature. As per FM Global Property Loss Prevention Data Sheets 8-9, March 2010 Interim Revision July 2021, 2. 3. 4. 3 K-Factors, Nominal ZjQcmQRYFpfptBannerStart Be Careful With This Message The sender's identity could not be verified and someone may be impersonating the sender. ZjQcmQRYFpfptBannerEnd Dear All, I am having a problem when choosing in-rack sprinkler head with FM approved, and having the right temperature. As per FM Global Property Loss Prevention Data Sheets 8-9, March 2010 Interim Revision July 2021, 2.3.4.3<https://urldefense.com/v3/__http:/2.3.4.3__;!!FaxH778!a8wz2QX3Ov8SR-NPmTRkFZcm58VeyggKZ0CIB86Qyp763XR5-fEHk36tmRoLBVct5vf1h4Msac--Nzc$> K-Factors, Nominal Temperature Rating, and RTI Rating of In-Rack Storage Sprinklers 2.3.4.3.1 Use nominally rated 160°F (70°C) FM Approved in-rack sprinklers for all in-rack sprinkler installations. I cannot find actual sprinkler head approved by FM and having this rated 160°F (70°C), for example, this model of Viking (bulb type) https://www.approvalguide.com/productDetail?productid=118279<https://urldefense.com/v3/__https:/www.approvalguide.com/productDetail?productid=118279__;!!FaxH778!a8wz2QX3Ov8SR-NPmTRkFZcm58VeyggKZ0CIB86Qyp763XR5-fEHk36tmRoLBVct5vf1h4MsiX-Sy8M$> Should I follow NFPA13, Chapter 23 - ESFR Requirements for Storage Applications 23.4.4 Sprinklers shall be intermediate temperature–rated ESFR pendent sprinklers with a nominal K-factor of K-25.2 (360). Checking the Viking ESFR sprinkler head, it seems only the fusible type is ranked as ESFR: Early Suppression Fast Response (ESFR) | Viking Group Inc.<https://urldefense.com/v3/__https:/www.vikinggroupinc.com/products/viking-fire-sprinklers/storage/esfr-early-suppression-fast-response-sprinklers__;!!FaxH778!a8wz2QX3Ov8SR-NPmTRkFZcm58VeyggKZ0CIB86Qyp763XR5-fEHk36tmRoLBVct5vf1h4MsP3TUGws$> But the temperature of Viking ESFR sprinkler head having FM approved is also not rated 160°F (70°C), but 74°C and 96°C FM3007275.PDF (vikinggroupinc.com)<https://urldefense.com/v3/__https:/www.vikinggroupinc.com/sites/default/files/databook/sprinklers/storage/121aefm.pdf__;!!FaxH778!a8wz2QX3Ov8SR-NPmTRkFZcm58VeyggKZ0CIB86Qyp763XR5-fEHk36tmRoLBVct5vf1h4MsDcx_6Hg$> Please can you advise. Regards, Le Vu Phong [cid:[email protected]] Indochine Engineering Vietnam JSC Unit 12-01 Pearl Plaza 561A Dien Bien Phu Street Binh Thanh District, HCMC, VN Mobile: +84 (0) 902 363 525 Tel: +84 (8) 3512 4100 Fax: +84 (8) 3512 4108 Web: www.indoeng.com<https://urldefense.com/v3/__http:/www.indoeng.com/__;!!FaxH778!a8wz2QX3Ov8SR-NPmTRkFZcm58VeyggKZ0CIB86Qyp763XR5-fEHk36tmRoLBVct5vf1h4Msnp4sqmE$> [cid:[email protected]]<https://urldefense.com/v3/__http:/www.linkedin.com/company/2077231__;!!FaxH778!a8wz2QX3Ov8SR-NPmTRkFZcm58VeyggKZ0CIB86Qyp763XR5-fEHk36tmRoLBVct5vf1h4Mshy0kobw$> [cid:[email protected]]<https://urldefense.com/v3/__http:/www.twitter.com/indoeng___;!!FaxH778!a8wz2QX3Ov8SR-NPmTRkFZcm58VeyggKZ0CIB86Qyp763XR5-fEHk36tmRoLBVct5vf1h4Ms17m-yKQ$> [cid:[email protected]]<https://urldefense.com/v3/__http:/www.youtube.com/user/indochineengineering__;!!FaxH778!a8wz2QX3Ov8SR-NPmTRkFZcm58VeyggKZ0CIB86Qyp763XR5-fEHk36tmRoLBVct5vf1h4Ms9h8s0Yk$> [cid:[email protected]] phong_indochineengineering 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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