NFPA 33-2018 en Standard for Spray Application Using Flammable or Combustible Materials (Effective Date 11 30 2017).pdf

1、 NFPA 33 Standard for Spray Application Using Flammable or Combustible Materials 2018IMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPA STANDARDS NOTICE AND DISCLAIMER OF LIABILITY CONCERNING THE USE OF NFPA STANDARDS NFPA codes, standards, recommended practices, and guides (“NFPA Standards”), of whi

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31、ndards can be viewed at no cost at www.nfpa.org/docinfo.33-1 NFPA and National Fire Protection Association are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169. Copyright 2017 National Fire Protection Association . All Rights Reserved. NFPA 33 Standard f

32、or Spray Application Using Flammable or Combustible Materials 2018 Edition This edition of NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, was prepared by the Technical Committee on Finishing Processes. It was issued by the Standards Council on November 10, 2017, wi

33、th an effective date of November 30, 2017, and supersedes all previous editions. This edition of NFPA 33 was approved as an American National Standard on November 30, 2017. Origin and Development of NFPA 33 NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, originally

34、titled Standard on Paint Spraying and Spray Booths, was initiated in 1921. The rst edition was published in 1922 as part of the Standard on Dip Tanks (now NFPA 34, Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids). Revised editions were published in 1926,

35、1928, 1935, 1937, 1941, 1946, 1950, 1953, 1954, 1955, 1957, 1959, 1960, 1961, 1963, 1966, 1969, 1973, 1977, 1982, 1985, 1987, 1989, 1995, 2000, 2003, 2006, and 2010. The following major changes were incorporated into the 2003 edition: (1) The arrangement of the text was modied to comply with the Man

36、ual of Style for NFPA Technical Committee Documents, including relocation of Chapter 17, Referenced Publications, to a new Chapter 2 and the addition of a new Chapter 3, Denitions, which incorporated all the denitions previously located in Chapter 1. (2) Chapter 6 (formerly Chapter 4), Electrical an

37、d Other Sources of Ignition, was extensively revised to recognize the Zone concept of area classication. Changes included the addition of appropriate denitions and revisions of the gures illustrating the area classications in and around spray areas, spray booths, spray rooms, and equipment. (3) Chap

38、ter 9 (formerly Chapter 7), Protection, was extensively revised to more effectively and more clearly present the requirements for re protection in spray areas. In addition, the requirements for interlocking were claried and requirements for automated electrostatic spray systems were modied to reect

39、current operational practices, including extending these concepts to powder application systems. (4) A new chapter was added that included several changes: Section 10.5 (formerly Section 8.5), Waste Containers, was to provide more specic guidance on the handling of waste materials. Section 10.7 (for

40、merly Section 8.7), Cleaning Operations, was revised to allow the use of any suitable solvent for cleaning of spray equipment, provided it is used safely. The requirements were also applied to spray apparatus cleaning systems. Finally, a new Section 10.8 was added to address the hazards of solvent d

41、istillation units. (5) The re protection requirements formerly located in Section 9.5, Exception No. 2, of the 2000 edition, were incorporated into Section 9.7 and Section 9.8. (6) Subsection 14.3.5 (formerly 12.3.5) was revised to incorporate the Zone concept of area classication for use with limit

42、ed nishing workstations. The following major changes were adopted in the 2007 edition: (1) In Chapter 3, the denition of spray area was revised to more clearly dene the extent of the spray area and to identify those parts of the process that are not considered part of the spray area. (2) In Section

43、5.5, the allowable materials for vision and observation panels were expanded to include laminated glass and other listed assemblies. Also, vision and observation panels for powder spray booths are now allowed to be of re retardant combustible materials. (3) Chapter 6 was amended with text extracted

44、from NFPA 70 , National Electrical Code , to reect changes in NFPA 70 to hazardous locations.SPRAY APPLICATION USING FLAMMABLE OR COMBUSTIBLE MATERIALS 33-2 2018 Edition (4) Denitions were extracted from NFPA 70, National Electrical Code, and added to Chapter 6 to recognize Class II, Zones 20, 21, a

45、nd 22 hazardous (classied) locations. (5) Section 7.7 was revised to allow re retardant combustible materials for ducts connected to powder coating booths. (6) In Chapter 8, the maximum quantities of ammable and combustible liquids were changed to correlate with changes to NFPA 30, Flammable and Com

46、bustible Liquids Code. (7) In Chapter 9, the requirements for protection of spray area exhaust ducts were revised, expanded, and claried. (8) In Chapters 11, 12, and 15, 11.3.6, 12.5.4, and 15.13.4 were added to designate certain highly resistive workpieces as grounded, if they meet certain criteria

47、 of surface conductivity. (9) In Chapter 13, more restrictive requirements for high temperature limit switches and interlocks were added for spray booths and spray rooms that are also used for drying and curing operations. (10) In Chapter 14, more denitive requirements were added for drying, curing,

48、 and fusion apparatus used in limited nishing workstations. The following major changes were adopted in the 2011 edition: (1) In Section 1.1, the scope was amended to exempt certain small quantity operations, and a decision tree was added to Annex A (A.1.1.1) to assist the user in determining whethe

49、r NFPA 33 is applicable to a particular spray application process. (2) The denition of spray area in 3.3.1.3 was amended to more clearly identify which parts of the spray system are not considered to be part of the spray area. (3) Chapter 6 was revised to recognize the Zone 21 and Zone 22 hazardous (classied) area classications for combustible dusts. This correlated with NFPA 70, National Electrical Code, with respect to the latters recognition of Zones 21 and 22 for electrical systems. (4) Section 7.7 was amended to allow con