1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 723 Test for Surface Burning Characteristics of Building MaterialsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MAT
2、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Test for Surface Burning Characteristics of Building Materials, UL 723 Tenth Edition, Dated September 10, 2008 Summary of Topics The revisions for UL 723 dated August 12, 2013 were iss
3、ued to update the Title Page to indicate the latest approval date as an American National Standard and to include the proposals dated April 12, 2013. The following revisions were made: Replacement of inorganic reinforced cement board with ber-cement board throughout the entire standard. Revisions to
4、 the referenced mounting methods in 4.3. Revision of A1.4 to add more details for ber-cement board. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the ma
5、rgin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated April 12, 2013. All rights reserved. No part of t
6、his publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including
7、but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the in
8、ability 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 form of the claim. Users of the electronic versions of ULs St
9、andards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers com
10、puter system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, 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 an
11、d that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. AUGUST 12, 2013 UL 723 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 12, 2013 UL 723 tr2 No Text on This Pa
12、geUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 10, 2008 (Title Page Reprinted: August 12, 2013) 1 UL 723 Standard for Test for Surface Burning Characteristics of Building Materials First Edition August, 1950 Second Edition Octob
13、er, 1958 Third Edition August, 1960 Fourth Edition January, 1971 Fifth Edition December, 1977 Sixth Edition November, 1983 Seventh Edition April, 1993 Eighth Edition July, 1996 Ninth Edition August, 2003 Tenth Edition September 10, 2008 This ANSI/UL Standard for Safety consists of the Tenth Edition,
14、 including revisions through August 12, 2013. The most recent designation of ANSI/UL 723 as an American National Standard (ANSI) occurred on August 12, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or propos
15、als for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of
16、a Standard should be altered 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. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 723-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPR
17、ODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 12, 2013 UL 723 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 General 4 PERFORMANCE 3 Fire Test Chamber 4 4 Test Specimens
18、9 5 Calibration of Test Equipment .10 6 Test Procedure 15 7 Classication 15 7.1 General 15 7.2 Multiple test data 17 7.3 Test data for ceiling and oor values .18 8 Analysis of Products of Combustion 18 REPORT 9 General .19 APPENDIX A GUIDE TO MOUNTING METHODS A1 Introduction A1 A2 Acoustical Materia
19、ls and Similar Panel Products Less Than 20 inches (508 mm) A2 A3 Adhesives A2A A4 Batt- or Blanket-Type Insulating Materials .A3 A5 Building Units A3 A6 Coating Materials, Cementitious Mixtures, and Sprayed Fibers .A3 A7 Loose-Fill Insulations .A4 A8 Plastics .A5 A9 Thin Membranes .A6 A10 Wire and C
20、ables A6 AUGUST 12, 2013 UL 723 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 This method of test for surface burning characteristics of building materials is applicable to any type of building material that, by i
21、ts own structural quality or the manner in which it is applied, is capable of supporting itself in position or being supported in the test furnace to a thickness comparable to its intended use. 1.2 The purpose of the test is to determine the comparative burning characteristics of the material under
22、test by evaluating the spread of ame over its surface and the density of the smoke developed when exposed to a test re, and thus to establish a basis on which surface burning characteristics of different materials are compared, without specic regard to all the end-use parameters that affect the surf
23、ace burning characteristics. 1.3 This method of test is intended to register performance during the period of exposure, and not to determine suitability for use after the test exposure. Reference the requirements in the Standard for Fire Tests of Building Construction and Materials, UL 263, for proc
24、edures for determining the performance, under re exposure conditions, of building constructions and materials when incorporated into a test structure and subjected to a standard exposing re of controlled extent and severity. 2 General 2.1 Values stated without parentheses are the requirement. Values
25、 in parentheses are explanatory or approximate information. 2.2 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. PERFORMANCE 3 Fire Test Chamber 3.1 The re test chamber, Figure
26、s 3.1 and 3.2, is to consist of a horizontal duct having an inside width of 17-3/4 1/4 in (451 6.3 mm) measured at the ledge location along the side walls and 17-5/8 3/8 in (448 9.5 mm) at all other points; (2) a depth of 12 1/2 in (305 12.7 mm) measured from the bottom of the test chamber to the le
27、dge of the inner walls on which the sample is supported including the 1/8-in (3.2-mm) thickness of woven berglass a gasketing tape, and a length of 25 ft (7.6 m). The sides and base of the duct are to be lined with insulating rebrick as illustrated in Figure 3.2. The insulating rebrick shall comply
28、with 3.2. One side of the chamber is to be provided with double observation windows b with the inside pane ush mounted (see Figure 3.2). The exposed area of an inside pane is to be 2-3/4 1/4 by 11.5 plus 1 minus 2 in (69.9 6.4 by 279 plus 25 minus 50 mm). The centerline of the exposed area of the in
29、side glass is to be in the upper half of the furnace wall, with the upper edge not less than 2-1/2 in (63 mm) below the furnace ledge. Each window is to be located such that not less than 12 in (305 mm) SEPTEMBER 10, 2008 UL 723 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIS
30、TRIBUTION WITHOUT PERMISSION FROM UL of the specimen width is observable. Multiple windows are to be located along the tunnel so that the entire length of the test sample is observable from outside the re test chamber. The windows are to be pressure tight (see 5.2 and 5.3). a McMaster-Carr No. 8817K
31、35 1-1/2 by 1/8-in woven berglass tape or equivalent works for this purpose. b Vycor, 100% silica glass, nominal 1/4-in (6.4-mm) thick or equivalent, works for the inside pane. Pyrex glass, nominal 1/4-in thick or equivalent, works for the outer pane. This is generated text for gtxt. This is generat
32、ed text for gtxt. Figure 3.1 Details of test furnace + See Figure 3.2 for Section BB SEPTEMBER 10, 2008 UL 723 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 3.2 Section BB SEPTEMBER 10, 2008 UL 723 6UL COPYRIGHTED MATERIAL NOT AUTH
33、ORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.2 With reference to 3.1, the insulating rebrick shall have the following properties, including Table 3.1: a) A maximum recommended temperature of 2600F (1424C). b) A bulk density of 48 + 3 lb/ft 3 (0.77 + 0.046 g/cm 3 ). Ta
34、ble 3.1 Thermal conductivity of the insulating rebrick at mean temperature Mean Temperature Thermal Conductivity F (C) Btuin/hrft 2 F W/mC 500 260 1.6 0.23 1000 538 1.9 0.27 1500 815 2.2 0.32 2000 1093 2.6 0.37 3.3 The ledges are to be fabricated of a structural material a capable of withstanding ab
35、use of continuous testing, level with respect to length and width of the chamber and each other, and maintained in a state of repair commensurate with the frequency, volume, and severity of testing occurring at any time. a High temperature furnace refractories such as Zicron work for this purpose. 3
36、.4 To provide air turbulence for proper combustion, turbulence baffling is to be provided by positioning six A. P. Green, G-26, refractory re bricks long dimension vertical, 4-1/2 in (114-mm) dimension along the wall along the side walls of the chamber at distances of 7, 12, and 20, 0.5 ft (2.1, 3.6
37、, and 6.1, 0.2 m) on the window side and 4-1/2, 9-1/2, and 16, 0.5 ft (1.3, 2.9, and 4.9, 0.2 m) on the opposite side. The position of the re bricks is to be measured from the centerline of the burners. 3.5 The top is to consist of a removable noncombustible (metal and mineral composite) structure i
38、nsulated with nominal 2-in (50.8-mm) thick mineral composition material as illustrated in Figure 3.2 and is to be of the size necessary to completely cover the re test chamber and test sample. The mineral composition material is to have physical characteristics comparable to the following: Maximum e
39、ffective temperature 1200F (649C); Bulk density 21 lb/ft 3 (336 kg/m 3 ); Thermal conductivity at 300 to 700F (149 to 371C) 0.50 0.71 Btuin/hft 2 F (0.072 0.102 W/mK) KpC a 14B t u 2 inft 5 hF 2 (1 10 4 4 10 4 W 2 Sm 4 K 3 ) The entire top assembly is to be protected with at sections of high density
40、 (nominal 90 lb/ft 3 or 1444 kg/m 3 ) 1/4-in (6.4-mm) ber-cement board b , maintained in an unwarped and uncracked condition through continued replacement. This protective board is not required to be either secured or unsecured to the furnace lid. When in place, the top is to be completely sealed ag
41、ainst the leakage of air into the re test chamber during the test. a KpC is equal to the thermal conductivity times the density times the specic heat. b ber-cement board such as Manville Building Materials Corp. Flexboard II and Tunnel Building Products Sterling Board work for this purpose. 3.5 revi
42、sed August 12, 2013 AUGUST 12, 2013 UL 723 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.6 One end of the test chamber, designated as the re end, is to be provided with two gas burners delivering ames upward against the surface of the t
43、est sample. The burners are to be spaced 12 in (305 mm) from the re end of the test chamber and 7-1/2 1/2 in (190.5 12.7 mm) below the under surface of the test sample. An air intake shutter is to be located 54 5 in (1.37 0.1 m) upstream of the burner, as measured from the burner centerline to the o
44、utside surface of the shutter. Gas to the burners is to be provided through a single inlet pipe, distributed to each burner port through a tee-section. The outlet is to be a 3/4-in (19-mm) elbow. The plane of the port is to be parallel to the furnace oor, such that the gas is directed upward toward
45、the specimen. Each port is to be positioned with its centerline 4 1/2 in (102 12.7 mm) on each side of the centerline of the furnace so that the ame is evenly distributed over the width of the exposed specimen surface. See Figure 3.2. The controls used to provide constant ow of gas to the burners du
46、ring periods of use are to consist of a pressure regulator, a gas meter calibrated to read in increments of not more than 0.1 ft 3 (2.8 L), a manometer to indicate gas pressure in inches of water (Pa), a quick-acting gas shutoff valve, a gas metering valve, and an orice plate in combination with a w
47、ater manometer to assist in maintaining uniform gas-ow conditions. An air intake tted with a vertically sliding shutter extending the entire width of the test chamber is to be provided at the re end. The shutter is to be positioned so as to provide an air inlet port 3 1/16 in (76 2 mm) high measured
48、 from the oor level of the test chamber, at the air intake point. 3.7 The other end of the test chamber, designated as the vent end, is to be tted with a gradual rectangular-to-round transition piece, not less than 20-in (508-mm) long with not less than 200 in 2 (1290 cm 2 ) cross-section at any poi
49、nt. The transition piece is to be, in turn, tted to a ue pipe 16 inches (406 mm) in diameter. The vent pipe is to be insulated with at least 2 in (50.8 mm) of high temperature mineral composition material from the vent end of the chamber to the photometer location. The movement of air is to be by an induced draft system having a total draft capacity of at least 0.15-in
