Dear All,
Should Non-Aspirating Sprinkler be listed with a specific foam? This is what is required by NFPA 409: 6.2.2 Deluge Foam-Water Sprinkler System Design and Performance. 6.2.2.10 The discharge devices shall have a minimum nominal 6.4 mm (1∕4 in.) orifice and shall be listed for use with the particular type of foam concentrate to be used in the system. However, such approval is not required by FMGlobal: FM Global- Property Loss Prevention Data Sheets 4-12, Jan 2013 3.2 Protection 3.2.1 Where to Find Foam-Water Sprinkler Components in the Approval Guide The following components are listed in the Foam-Water Sprinkler section of the Approval Guide: • Automatic sprinklers • Deluge sprinklers* • Aspirated sprinklers • Foam concentrates * Deluge sprinklers are not listed as such in the Approval Guide; they are simply FM Approved automatic sprinklers that can be ordered in the open orifice (deluge) configuration from the manufacturer. I did not find any such requirement in NFPA 11 or NFPA 16 that are more specific Standard referenced in NFPA 409. What is required is to use listed components. The NFPA 409 requirement as per 6.2.2.10 seems to be rather odd: It is necessary to use listed components such as sprinklers, accessories and Foam. Aspirating Foam Sprinkler is listed as such without a specific foam. Why should regular open sprinkler be listed together with a specific foam. Your comments are welcome. Dan Dan Arbel Risk Engineering T: 972-4-8243337 F: 972-4-8243278 M: 972-52-6611337 Mail: <mailto:[email protected]> [email protected] W: www.riskmanage.com
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