1、NFPA750 Standard on Water Mist Fire Protection Systems 2015 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization 1/14ISBN: 978-145590911-7 (Print)ISBN: 978-145590951-3 (PDF)IMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPASTANDARDS NOTICE AND DIS
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29、d at no cost at www.nfpa.org/freeaccess.Copyright 2014 National Fire Protection Association. All Rights Reserved.NFPA750Standard onWater Mist Fire Protection Systems2015 EditionThis edition of NFPA 750, Standard on Water Mist Fire Protection Systems, was prepared by theTechnical Committee on Water M
30、ist Fire Suppression Systems and acted on by NFPA at itsJune Association Technical Meeting held June 912, 2014, in Las Vegas, NV. It was issued bythe Standards Council on July 14, 2014, with an effective date of July 29, 2014, and supersedesall previous editions.This edition of NFPA 750 was approved
31、 as an American National Standard on July 29, 2014.Origin and Development of NFPA 750In 1993, representatives from the research and engineering communities, water mist sys-tem manufacturers, the insurance industry, enforcement authorities, and industrial users metand organized the NFPA Technical Com
32、mittee on Water Mist Fire Suppression Systems. Thecommittee started work on developing a new NFPA document that would begin to standard-ize water mist technology and provide for reliable design and installation of these systems.Water mist systems were introduced in the 1940s and were utilized for sp
33、ecific applicationssuch as on passenger ferries. The renewed interest in water mist systems is due partially to thephasing out of halon and their potential as a fire safety system for spaces where the amount ofwater that can be stored or that can be discharged is limited. In addition, their applicat
34、ionand effectiveness for residential occupancies, flammable liquids storage facilities, and electri-cal equipment spaces continues to be investigated with encouraging results.NFPA 750 contains elements that are similar to standards on other types of fire protectionsystems such as automatic sprinkler
35、s, fixed water spray, carbon dioxide, and halon. In manyways, water mist can be thought of as a hybrid of those systems. Overall, water mist systemsutilize water as the extinguishing, suppression, or control medium but do so in a nontradi-tional manner. In developing this standard, the committee add
36、ressed system components andhardware, system types, installation requirements, design objectives, hazard classifications,calculations, water supplies, atomizing media, plans, documentation, acceptance criteria, andmaintenance considerations.The 2000 edition of NFPA 750 represented a significant adva
37、ncement in water mist tech-nology and the knowledge base associated with its application. That edition included a newdefinition of water mist and a complete rewrite and reorganization of what was Chapter 5,Design Objectives and Fire Test Protocols. Additionally, many new sections were added toaddres
38、s the design and safety considerations associated with positive displacement water mistpumps. New guidance was provided for the measurement of the water mist spray characteris-tics including drop distribution. Finally, two new appendixes were added to address many ofthe current and proposed fire tes
39、t protocols and the reliability of water mist systems.The 2003 edition incorporated revisions that updated the standard to comply with theManual of Style for NFPATechnical Committee Documents. Style changes included a restructuringof the document, reworded exceptions as requirements, and transition
40、to a metric-as-primarydocument. The 2003 edition contained updated requirements for additives, proportioningmethods, supervision, calculation methods, and inspection and testing of water mist systems.New requirements were added that addressed protection of machinery spaces on towingvessels.The 2006
41、edition updated requirements for hangers, supports, reserve water supplies,pump capacities, and appropriate test connections.The 2010 edition included new annex material providing guidance on obstruction tonozzle discharge and a number of editorial revisions.7501NFPA and National Fire Protection Ass
42、ociation are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169.The 2015 edition of NFPA 750 provides significant development in the knowledge to design water mist systems forvarious defined occupancies. Two chapters have been added to address the dynamics
43、 of occupancy classification indesigning a water mist system: Chapter 5, Classification of Occupancies, and Chapter 10, Occupancy ProtectionSystems. In addition, the inspection, testing, and maintenance sections for water mist systems, other than thoseinstalled in one- and two-family dwellings, have
44、 been removed and now reference NFPA 25, Standard for the Inspection,Testing, and Maintenance of Water-Based Fire Protection Systems.7502 WATER MIST FIRE PROTECTION SYSTEMS2015 EditionTechnical Committee on Water Mist Fire Suppression SystemsLarry W. Owen, ChairDooley Tackaberry, Inc., TX IMAnthony
45、J. Cacioppo, Road Sprinkler Fitters UA Local669, LA LRep. United Assn. of Journeymen 1 bar = 105PaLiter per minute per squaremeterL/min/m21 gpm = 40.746 L/min/m2Micron 1 mm = 1000 7507REFERENCED PUBLICATIONS2015 EditionIMO MSC/Circ. 913, Guidelines for the Approval of FixedWater-Based Local Applicat
46、ion Fire-Fighting Systems for Use in Cat-egory A Machinery Spaces, 1999.SOLAS Regulation 11-2/12.4.1, Consolidated Edition,2009.2.3.5 ISO Publications. International Organization for Stan-dardization, 1 rue de Varemb, Case postale 56, CH-1211 Gen-eve 20, Switzerland.ISO 1219-1, Fluid power systems a
47、nd components Graphicsymbols and circuit diagrams Part 1: Graphic symbols, 2006.ISO 1219-2, Fluid power systems and components Graphicsymbols and circuit diagrams Part 2: Circuit diagrams, 1995.2.3.6 ULC Publications. Underwriters Laboratories ofCanada, 7 Underwriters Road, Toronto, Ontario M1R 3B4,
48、Canada.CAN/ULC S524-06, Standard for the Installation of Fire AlarmSystems, 2006.CAN/ULC S529-02, Standard forSmoke Detectors forFireAlarmSystems, 2002.2.3.7 U.S. Coast Guard Publication. 2100 Second Street,S.W., Washington, DC 20593-0001.NVIC 9-97, Guide to Structural Fire Protection, 2011.2.3.8 U.
49、S. Government Publication. U.S. Government Print-ing Office, Washington, DC 20402.Title 46, Code of Federal Regulations, Parts 56.50 and56.75, “Shipping.”Title 49, Code of Federal Regulations, “Transportation.”2.3.9 Other Publications.EN-13480-3, Metallic Industrial Piping Code, Design and Calcu-lation, 2002.Merriam-Websters Collegiate Dictionary, 11th edition,Merriam-Webster, Inc., Springfield, MA, 2003.2.4 References for Extracts in Mandatory Sections.NFPA 13, Standard forthe Installation of SprinklerSystems, 2013edition.NFPA 20, Standard for the Installati
