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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 1093 December 14, 2007 SUMMARY OF TOPICS The following is being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Proposal to add Fire Test Requirements COMMENTS DUE: January 28, 2007 This proposal
2、is for review and comment only (no ballot at this time). Please note that comments on a preliminary review document will not receive a response from the proposal author through CSDS. Instead, the proposal author will be asked to review the comments and adjust the proposals and/or supporting rational
3、e as the author determines to be appropriate. The preliminary review process is an informal mechanism that provides authors with the opportunity to refi ne their proposals before they advance to the next stage in ULs standards development process. In some cases, the author of the proposals may choos
4、e to discontinue them. In this case, the author need not do anything after preliminary review has ended. Normally, the next step in the process is the more formal STP ballot and stakeholder review process. Only comments posted during the STP ballot and stakeholder review process will be provided wit
5、h a response in CSDS. For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions are shown lined-out. 1. For Preliminary Review Only: Proposal to add Fire Test Requirements RATIONALE Proposal submitted by: George Laverick, UL Portable Fire
6、 extinguisher Standards UL 8, UL 154, UL 299, UL 626, UL 711 and UL 2129 have recently completed a Bi-national harmonization effort that harmonizes UL and ULC requirements. However, UL 1093 was not included as part of this effort. Based on the information on fi le, it appears that the Technical Harm
7、onization Committee (THC) did not include UL 1093 since it was anticipated that the production of this type of extinguisher would cease before the revised requirements would become effective. Lack of Halon extinguishing agent availability as a result of the Montreal Protocol was expected to eliminat
8、e extinguisher production, but extinguisher manufactures indicated that Halon extinguishers are currently being produced. Manufacturers also stated that they anticipate continued production due to the current FAA requirements that specify installation of Halon extinguishers on aircraft. It is also a
9、nticipated that the FAA will revise the requirements to allow Clean Agent Extinguishers for aircraft in the near future. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 19:01:40 MSTNo reproduc
10、tion or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION The Seventh Edition of UL 711 includes revised requirements for Class A extinguishers that were a part of the harmonization proposals included by the THC. Since Halon extinguishe
11、rs are not part of the harmonization effort, requirements from the Class A fi re testing from the Fifth Edition of UL 711 are being proposed to be included in UL 1093. The remainder of the Seventh Edition of UL 711 will apply. PROPOSAL 1.2 The requirements for performance during fi re testing of Hal
12、on type fi re extinguishers are specifi ed in the Standard for Rating and Fire Testing of Fire Extinguishers, ANSI/UL 711 for extinguishers rated for Class B, C, D and K and Section 24.2 for extinguishers rated for Class A. 24 Fire Tests 24.1 General 24.1 24.1.1 Halon-type fi re extinguishers shall
13、comply with the Standard for the Rating and Fire Testing of Fire Extinguishers, ANSI/UL 711 for extinguishers rated for Class B, C, D and K, and Sections 24.2- 24.5 for extinguishers rated for Class A. 24.2 24.1.2 An extinguisher, charged with its rated capacity and conditioned at the minimum storag
14、e temperature minus 40F (minus 40C) or minus 65F (minus 54.5C), as applicable for 24 hours, shall extinguish a Class B test fi re having an area in square feet numerically equal to the B rating of the extinguisher. 24.1.3 The fl ammable liquid “heptane” used in the following test is to be commercial
15、 grade having the following characteristics: a) Distillation 1) Initial Boiling Point minimum 90C (194F) 2) 50 Percent. 94C (201F) 3) Dry Point. maximum 100C (212F) b) Gravity API.70.2 (not critical) c) Specifi c Gravity 0.69 0.73 (60F/60F) DECEMBER 14, 2007SUBJECT 1093-2- Copyright Underwriters Lab
16、oratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 19:01:40 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 24.2 Class A fi res 24.2.
17、1 A Class A fi re extinguisher, under conditions of continuous discharge with all devices for controlling the fl ow of the extinguishing agent maintained in the position for maximum discharge, shall extinguish wood crib and wood panel test fi res as designated in the following requirements for a giv
18、en class and rating. A test fi re is considered to be extinguished when it reaches a state that will not be subject to self-reignition or continued smoldering under the conditions of test. 24.2.2 For an extinguisher to become eligible for a given class and rating, the specifi ed test fi res are to b
19、e extinguished repeatedly, and each test is to be conducted starting with a fully charged extinguisher. 24.2.3 The minimum effective discharge time shall be at least 13 seconds for an extinguisher intended for a 2A or higher rating class. 24.2.4 The minimum effective discharge time is to be determin
20、ed by an operation test of an extinguisher charged to its rated capacity and conditioned at 70F (21.1C) while being held in its intended operating position. 24.2.5 Class A extinguishers to be rated on the basis of tests for Rating-Class 1-A through 6-A shall be subjected to the appropriate wood-crib
21、, wood-panel, and excelsior test fi res. Class A extinguishers for Rating-Class 20-A and higher shall be rated on the basis of appropriate wood-crib test fi res only. Class A extinguishers for Rating-Class 10-A shall have been found eligible for this rating on the basis of a Rating-Class 6-A panel t
22、est fi re, and Rating-Class 10-A wood-crib test fi res. 24.3 Wood-crib fi re test 24.3.1 Wood-crib fi re tests for Rating-Class up to and including 10-A are to be conducted in an essentially draft-free room having a volume sufficiently large as to assure the necessary supply of oxygen and reasonable
23、 visibility for the period of the test. A room having a ceiling height of approximately 24 feet (7.3 m) and a volume of at least 57,000 cubic feet (1615 m3) has been found to be acceptable for these purposes. The room is to have a smoothly fi nished concrete fl oor. For a Rating-Class exceeding 10-A
24、, the tests may be conducted outdoors under conditions of essentially still air steady between 3 and 8 miles per hour (1.3 and 3.6 m/s) with gusts not greater than 10 miles per hour (4.5 m/s) and no precipitation. 24.3.2 A wood crib is to consist of layers of trade size 2 by 2 (1-1/2 by 1-1/2) inch
25、(38 by 38 mm) or trade size 2 by 4 (1-1/2 by 3-1/2) inch (38 by 89 mm) kiln-dried spruce or fi r lumber having a moisture content between 9 and 13 percent as determined by the Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials, ASTM D4442-92, and Standard Test Metho
26、ds for Use and Calibration of Hand-Held Moisture Meters, ASTM D4444-92, in which samples are dried to constant weight in an oven at a temperature of 103 2C. The general confi guration and support of a typical crib is illustrated by Figure 24.1. The alternate layers are to consist of specifi ed sizes
27、 and lengths of lumber placed at right angles to one another. The individual wood members in each layer are to be evenly spaced in forming a square determined by the specifi ed length of the wood members. The length, size, and number of individual wood members and their arrangement in the crib are t
28、o be as specifi ed in Table 24.1. This is generated text for fi gtxt. DECEMBER 14, 2007SUBJECT 1093-3- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 19:01:40 MSTNo reproduction or networking
29、 permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Table 24.1 Wood-crib construction Classifi cation and rating Number of wood members Trade size and length of wood members,Arrangement of wood members in crib InchesActual mm 1-A502 by 2 by 202 by
30、2 by 2010 layers of 5 2-A782 by 2 by 25-5/838 by 38 by 65113 layers of 6 3-A982 by 2 by 30-3/438 by 38 by 78114 layers of 7 4-A1202 by 2 by 33-3/838 by 38 by 84815 layers of 8 6-A1532 by 2 by 38-3/838 by 38 by 84817 layers of 9 10-A2092 by 2 by 47-1/238 by 38 by 120719 layers of 11 20-A1602 by 4 by
31、62-1/438 by 89 by 158110 layers of 15 on edge 1 top layer of 10 fl at 30-A1922 by 4 by 74-5/838 by 89 by 189510 layers of 18 on edge 1 top layer of 12 fl at 40-A2242 by 4 by 87-1/838 by 89 by 221310 layers of 21 on edge 1 top layer of 14 fl at Figure 24.1 Wood crib DECEMBER 14, 2007SUBJECT 1093-4- C
32、opyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 12/17/2007 19:01:40 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION
33、24.3.3 The crib is to be constructed on two 2-1/2 by 1-1/2 inch (63 by 38 mm) angle irons, or other similar and appropriate supports, placed on concrete blocks, as shown in Figure 24.1, at the height shown in Table 24.1. The wood members forming the outside edges of the crib are to be stapled or nai
34、led together to provide strength to resist forces exerted by the extinguishing media. 24.3.4 Ignition of the crib is to be accomplished by the burning of commercial grade heptane, see 24.1.3, in a pan placed symmetrically under the vertical axis of the crib. The steel pans for all sizes are to be sq
35、uare. The dimensions of the pan and the amount of fuel to be burned are to be as specifi ed in Table 24.2. 24.3.5 When supplementary operations are required to activate an extinguisher (such as puncturing of cartridges or opening of valves on expellant gas containers), they are to be performed at a
36、time in advance of attack on the fi re consistent with normal operating procedure for the extinguisher and sufficient to ensure that the extinguisher is operated at, but not in excess of, its normal operating pressure. 24.3.6 For Rating-Class up to and including 4-A, the igniting fi re will burn for
37、 2 4 minutes, after which the crib is allowed to burn for a total period of 8 10 minutes (preburn period) or until stick members in the top three rows have been reduced to diameters of 3/4 1 inch (19 25 mm). After the preburn period the crib fi re is to be attacked, using the extinguisher under test
38、. The crib is to be attacked from the front from an initial distance of not less than 6 feet (1.8 m). The operator may then reduce the distance of attack and direct the discharge at the sides, top, and bottom of the crib. In no case shall the discharge be directed at the back of the crib. Table 24.2
39、 Wood-crib ignition arrangement Classifi cation and rating Flammable liquid pan size,Heptane charge, Height of supports above fl oor or grade, InchesmmU.S. gallonsL (dm3)Inchesmm 1-A21 by 21 by 4533 by 533 by 1021/40.9516405 2-A21 by 21 by 4533 by 533 by 1021/21.9016405 3-A27 by 27 by 4686 by 686 by
40、 1023/42.8516405 4-A27 by 27 by 4686 by 686 by 10213.816405 6-A32 by 32 by 4813 by 813 by 1021-1/25.7016405 10-A38 by 38 by 12965 by 965 by 3052-1/48.532810 20-A54 by 54 by 121372 by 1372 by 305 4-1/217.0032810 30-A66 by 66 by 121676 by 1676 by 305 622.7032810 40-A76 by 76 by 121930 by 1930 by 305 1
41、037.9032810 24.3.7 For Rating-Class over 4-A, the igniting fi re will burn for 2 4 minutes, after which the crib is allowed to burn for a total preburn period of 6 7 minutes or until stick members in the top three rows have been reduced to diameters of 1/2 2/3 of their original dimensions. The initi
42、al attack is to be made from the front at a nozzle distance of not less than 6 feet (1.8 m). In no case shall the discharge be directed at the back of the crib. DECEMBER 14, 2007SUBJECT 1093-5- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/11111
43、11001, User=Japan, IHS Not for Resale, 12/17/2007 19:01:40 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 24.3.8 During the preburn period the following observations are to be made and recorded at intervals: a)
44、Height of fl ame above top of crib. b) Amount of side area covered by fl ame. c) Burnout time of commercial grade heptane charge. 24.3.9 After the preburn period the following times are to be recorded: a) Application of extinguisher. b) Fire under control or extinguished. c) End of effective dischar
45、ge. 24.3.10 When the fi re is under control or extinguished, observations are to be made and recorded concerning the presence and location of any glowing embers and the increase or decrease of the intensity of such glowing combustion until the fi re reignites or is completely extinguished. In the ev
46、ent of reignition, the time is to be recorded. 24.3.11 At the end of the test, the amount of extinguishing agent used and the condition of the charred members of the crib are to be noted and recorded. An indication of a test properly conducted and a fi re successfully extinguished is the presence of
47、 a 1/2 inch (12.7 mm) core of unburned wood remaining in a member removed from the center of the top layer of the crib. 24.3.12 Wind velocities and weather conditions are to be recorded for outdoor tests. 24.4 Wood-panel fi re test 24.4.1 Wood-panel fi re tests are to be conducted in an essentially
48、draft-free room having a volume sufficiently large as to assure the necessary supply of oxygen and reasonable visibility for the period of the test. A room having a ceiling height of approximately 24 feet (7.3 m) and a volume of at least 57,000 cubic feet (1615 m3) has been found to be acceptable fo
49、r these purposes. The room is to have a smoothly fi nished concrete fl oor. 24.4.2 The wood panel is to consist of a solid square wood-panel backing on which are applied two horizontal sections of furring strips spaced apart and away from the panel by vertical furring strips to provide for a large vertical surface area of wood s