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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1254 ISBN 0-7629-1068-2 Pre-Engineered Dry Chemical Extinguishing System Units UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL C
2、OPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Underwriters Laboratories Inc. (UL) 333 Pfi ngsten Road Northbrook, IL 60062-2096 UL Standard for Safety for Pre-Engineered Dry Chemical Extinguishing System Units, UL 1254 Third Edition, Dated Feb
3、ruary 4, 2005 Summary of Topics This new edition of ANSI/UL 1254 is a periodic re-issuance to ensure that ULs Standards remain up to date with regard to format and editorial issues such as numbering, pagination, and cross-referencing. This new edition also includes a revision of Heptane Specifi cati
4、ons. The new requirements are substantially in accordance with ULs Bulletin(s) on this subject dated August 18, 2004 and November 18, 2004. The bulletin(s) is now obsolete and may be discarded. As indicated on the title page (page 1), this UL Standard for Safety is an American National Standard. Att
5、ention is directed to the note on the title page of this Standard outlining the procedures to be followed to retain the approved text of this ANSI/UL Standard. The UL Foreword is no longer located within the UL Standard. For information concerning the use and application of the requirements containe
6、d in this Standard, the current version of the UL Foreword is located on ULStandardsInfoNet at: http:/ The master for this Standard at ULs Northbrook Office is the official document insofar as it relates to a UL service and the compliance of a product with respect to the requirements for that produc
7、t and service, or if there are questions regarding the accuracy of this Standard. ULs Standards for Safety are copyrighted by UL. Neither a printed copy of a Standard, nor the distribution diskette for a Standard-on-Diskette and the fi le for the Standard on the distribution diskette should be alter
8、ed in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, elec
9、tronic, mechanical photocopying, recording, or otherwise without prior permission of UL. Revisions of UL Standards for Safety are issued from time to time. A UL Standard for Safety is current only if it incorporates the most recently adopted revisions. UL provides this Standard as is without warrant
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11、ta, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the f
12、orm of the claim. FEBRUARY 4, 2005 UL 1254tr1 UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL will attempt to answer support requests concerning electronic versions of its Standards. However, this support service is offered on a reasonabl
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16、purchased, one copy of this Standard may be stored on the hard disk of a single personal computer, or on a single LAN fi le-server or the permanent storage device of a multiple-user computer in such a manner that this Standard may only be accessed by one user at a time and for which there is no poss
17、ibility of multiple concurrent access. If a multiple-user version electronic Standard was purchased, one copy of the Standard may be stored on a single LAN fi le-server, or on the permanent storage device of a multiple-user computer, or on an Intranet server. The number of concurrent users shall not
18、 exceed the number of users authorized. Electronic Standards are intended for on-line use, such as for viewing the requirements of a Standard, conducting a word search, and the like. Only one copy of the Standard may be printed from each single-user version of an electronic Standard. Only one copy o
19、f the Standard may be printed for each authorized user of a multiple-user version of an electronic Standard. Because of differences in the computer/software/printer setup used by UL and those of electronic Standards purchasers, the printed copy obtained by a purchaser may not look exactly like the o
20、n-line screen view or the printed Standard. An employee of an organization purchasing a UL Standard can make a copy of the page or pages being viewed for their own fair and/or practical internal use. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables,
21、fi gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMEN
22、TS notice. New product submittals made prior to a specifi ed future effective date will be judged under all of the requirements in this Standard including those requirements with a specifi ed future effective date, unless the applicant specifi cally requests that the product be judged under the curr
23、ent requirements. However, if the applicant elects this option, it should be noted that compliance with all the requirements in this Standard will be required as a condition of continued Recognition and Follow-Up Services after the effective date, and understanding of this should be signifi ed in wr
24、iting. Copyright 2005 Underwriters Laboratories Inc. This Standard consists of pages dated as shown in the following checklist: PageDate 1-58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . February 4,
25、 2005 A1-A2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . February 4, 2005 FEBRUARY 4, 2005 UL 1254tr2 UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
26、FROM UL FEBRUARY 4, 2005 1 UL 1254 Standard for Pre-Engineered Dry Chemical Extinguishing System Units First Edition July, 1992 Second Edition June, 1996 Third Edition February 4, 2005 The most recent designation of ANSI/UL 1254 as an American National Standard (ANSI) occurred on January 11, 2005. T
27、his ANSI/UL Standard for Safety, which consists of the Third edition is under continuous maintenance, whereby each revision is ANSI approved upon publication. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Written comments are to be sent to UL-RTP
28、 Standard Department, 12 Laboratory Dr., P.O. Box 13995, Research Triangle Park, NC, 27709-3995. An effective date included as a note immediately following certain requirements is one established by Underwriters Laboratories Inc. Revisions of this Standard will be made by issuing revised or addition
29、al pages bearing their date of issue. A UL Standard is current only if it incorporates the most recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. ISBN 0-7629-1068-2 COPYRIGHT 1996, 2005 UNDERWRITERS LABORATORIES I
30、NC. ANSI/UL 1254-2005 UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 4, 2005PRE-ENGINEERED DRY CHEMICAL EXTINGUISHING SYSTEM UNITS - UL 12542 No Text on This Page UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D
31、ISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 3 Units of Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 4 Undated References . . . . . . . . . . . . . . . . . .
33、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 5 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 CONSTRUCTION 6 General . . . . . . .
34、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 7 Electrically Operated Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 8 Contro
35、ls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 9 Caps, Valves, and Closures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 10 Pr
36、essure Vessels and Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 11 Gaskets and O-Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 12 Gas Car
37、tridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 13 Pressure Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
38、 14 Pressure Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 15 Puncturing Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39、 .17 16 Siphon Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 17 Dry Chemical Agents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
40、. . . . . . .17 18 Nitrogen and Air Expellant Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 19 Polymeric Materials and Nonmetallic Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 20
41、Anti-Recoil Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 21 Hose Assemblies Used for Distribution of Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 22 Electrically
42、Operated Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 23 Pressure Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 24 Nozzles . .
43、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 PERFORMANCE 25 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
44、. . . . . . . . . . . . .19 26 Fire Test Total Flooding Protection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 26.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
45、 . . . . .19 26.2 Class A fi re tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 26.3 Class B fi re tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
46、 . . . .21 26.4 Automatic extinguisher units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 27 Fire Test Class B Local Application Protection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 28 Fire Test Automobile Serv
47、ice Station Fueling Area Protection System . . . . . . . . . . . . . . . . . . .25 29 Fire Test Open-Face Paint Spray Booth Protection System . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 29.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
48、 . . . . . . . . . . . . . . . . . . . . . . . . .27 29.2 Test apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 29.3 General test method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
49、. . . . . . . . . . . . . . . . . . . . .30 29.4 Class A fi re tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 29.5 Class B fi re tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 30 Fire Test Vehicle Paint Spray Booth Protection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 30.1 General . . . . . . . . . . . . . . .
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