UL 723-2018 UL Standard for Safety Test for Surface Burning Characteristics of Building Materials (Eleventh Edition).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 723 Test for Surface Burning Characteristics of Building Materials STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM

2、ULUL COPYRIGHTED MATERIAL 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 Eleventh Edition, Dated April 19, 2018 Summary of Topics This New Edition for the Standard fo

3、r Safety for Test for Surface Burning Characteristics of Building Materials, UL 723, has been issued to include the Heptane Representative Curve. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The requirements ar

4、e substantially in accordance with Proposal(s) on this subject dated February 9, 2018. All rights reserved. No part of this 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

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6、r damages, including loss of prots, lost savings, loss of data, 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

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8、resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. APRIL 19, 2018 UL 723 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 19, 2018 UL 723 tr2 No Text

9、on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 19, 2018 1 UL 723 Standard for Test for Surface Burning Characteristics of Building Materials First Edition August, 1950 Second Edition October, 1958 Third Edition August, 196

10、0 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, 2018 Eleventh Edition April 19, 2018 This ANSI/UL Standard for Safety consists of the Tenth Edition, incl

11、uding revisions through April 19, 2018. The most recent designation of ANSI/UL 723 as an American National Standard (ANSI) occurred on April 19, 2018. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page. Comments or proposals for revisions on any part of t

12、he 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 https:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in a

13、ny way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2018 UNDERWRITERS LABORATORIES INC. ANSI/UL 723-2018UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT

14、PERMISSION FROM UL APRIL 19, 2018 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 9 5 Calibration of Test Equipment

15、.10 6 Test Procedure 17 7 Classication 18 7.1 General 18 7.2 Multiple test data 19 7.3 Test data for ceiling and oor values .21 8 Analysis of Products of Combustion 22 REPORT 9 General .22 APPENDIX A GUIDE TO MOUNTING METHODS A1 Introduction A1 A2 Acoustical Materials and Similar Panel Products Less

16、 Than 20 inches (508 mm) A2 A3 Adhesives .A2 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 Cables A6 APRIL 19, 2018 UL 723 3UL

17、 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 its own structural quality or the ma

18、nner 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 test by evaluating the spread of am

19、e 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 surface burning characteristics. 1.3 Th

20、is 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 procedures for determining the performa

21、nce, 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 in parentheses are explanatory or

22、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, Figures 3.1 and 3.2, is to consist of a h

23、orizontal 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 ledge of the inner walls on which the

24、 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 with 3.2. One side of the chamber i

25、s 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 inside glass is to be in the upper ha

26、lf 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) of the specimen width is observable. Multiple windows are to be located along the tunnel so that the entire length of the test sampl

27、e 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. 8817K35 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 insid

28、e pane. Pyrex glass, nominal 1/4-in thick or equivalent, works for the outer pane. APRIL 19, 2018 UL 723 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This is generated text for gtxt. This is generated text for gtxt. Figure 3.1 Details of

29、 test furnace + See Figure 3.2 for Section BB APRIL 19, 2018 UL 723 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 3.2 Section BB APRIL 19, 2018 UL 723 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION

30、 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 ). Table 3.1 Thermal conductivity of the insulating

31、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 abuse of continuous testing, level with respect t

32、o 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. 3.4 To provide air turbulence for proper combust

33、ion, 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, and 6.1, 0.2 m) on the window side and 4-1/2,

34、 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 insulated with nominal 2-in (50.8-mm) thick mine

35、ral 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 effective temperature 1200F (649C); Bulk density

36、 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 (nominal 90 lb/ft 3 or 1444 kg/m 3 ) 1/4-in (6

37、.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 against the leakage of air into the re test chamb

38、er 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. APRIL 19, 2018 UL 723 7UL COPYRIGHTED MATERIAL NOT AUTH

39、ORIZED 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 test sample. The burners are to be spaced 12 in (305 mm) from the re end of t

40、he 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 outside surface of the shutter. Gas to the burners is to be provided through

41、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 the specimen. Each port is to be positioned with its centerline 4 1/2 in (10

42、2 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 during periods of use are to consist of a pressure regulator, a gas meter cali

43、brated 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 water manometer to assist in maintaining uniform gas-ow conditions. An air in

44、take 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 from the oor level of the test chamber, at the air intake point. 3.7 The ot

45、her 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 point. The transition piece is to be, in turn, tted to a ue pipe 16 inches (406

46、 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 wate

47、r-column (37.4 Pa) with the sample in place, the shutter at the re end open the normal 3 1/16-in (76 2 mm), and the damper in the fully-open position. A draft gauge tap, to indicate static pressure, is to be inserted through the top at the midwidth of the tunnel, 1 1/2 in (25 13 mm) below the ceilin

48、g, and 15 1/2 in (380 13 mm) downstream from the inlet shutter. 3.8 A photometer system a consisting of a light source and photocell is to be mounted on a horizontal section of the 16-in (406-mm) diameter vent pipe at a point where it will be preceded by a straight run of pipe at least 12 diameters

49、or 16 ft (4.9 m) but not more than 30 diameters or 40 ft (12.2 m) from the vent end of the chamber, and with the light beam directed upward along the vertical axis of the ventpipe. A photoelectric cell whose output is directly proportional to the amount of light received is to be mounted over the light source and connected to a recording device for indicating changes in the attenuation of incident l