1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2431 Durability of Fire Resistive Coatings and MaterialsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT
2、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Durability of Fire Resistive Coatings and Materials, UL 2431 Second Edition, Dated October 15, 2014 Summary of Topics This is a new second edition of the Standard for Safety for Durability of Fi
3、re Resistive Coatings and Materials, UL 2431. The new edition aligns the standard with current testing methods and practices and also includes a title change. These new/revised requirements are substantially in accordance with Proposal(s) on this subject dated January 31, 2014. All rights reserved.
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8、rchasers computer 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 bee
9、n revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. OCTOBER 15, 2014 UL 2431 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 15, 2014 UL 2431 tr2 No
10、 Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL October 15, 2014 (Title Page Reprinted: October 15, 2014) 1 UL 2431 Standard for Safety for Durability of Fire Resistive Coatings and Materials The rst edition was titled “Sta
11、ndard for Safety for Durability of Spray-Applied Fire Resistive Coatings First Edition August, 2007 Second Edition October 15, 2014 This ANSI/UL Standard for Safety consists of the Second Edition . The most recent designation of ANSI/UL 2431 as an American National Standard (ANSI) occurred on Octobe
12、r 15, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals 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-L
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14、e sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 2431-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 15, 2014 DURABILITY OF FIRE RESISTIVE COATINGS AND MATERIALS - UL 2431 2 No Text on T
15、his PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 5 2.1 Units of measurement .5 2.2 Undated references .5 3 Glossary .6 PERFORMANCE 4 General 7 4.1 General .7 4.2 Steel tube sections .7 4.3 Pr
16、otective coating system 12 5 Conditioning Environments 13 5.1 General 13 5.2 Temperature stability .15 5.3 Air erosion 16 5.4 Combination wet, freeze, and dry cycling .16 5.5 Humidity 16 5.6 Impact resistance .16 5.7 Industrial atmosphere 19 5.8 Salt spray 20 5.9 Ultraviolet light 20 5.10 Vibration
17、20 6 Fire Test 20 7 Test Furnace 21 8 Time-Temperature Curves 21 8.1 Normal temperature rise curve 21 8.2 Rapid temperature rise curve .23 9 Furnace Temperature 23 9.1 General 23 9.2 Normal temperature rise curve 24 9.3 Rapid rise temperature curve .25 9.4 Sample placement .25 10 Sample Set 26 11 Pe
18、rformance Criteria 26 11.1 Control samples 26 11.2 Conditioned samples .26 11.3 Protective coating system .27 REPORT 12 General 28 APPENDIX A A1 Requirements for Thermocouple Pads .A1 OCTOBER 15, 2014 DURABILITY OF FIRE RESISTIVE COATINGS AND MATERIALS - UL 2431 3UL COPYRIGHTED MATERIAL NOT AUTHORIZ
19、ED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX B Standard Normal TEMPERATURE Rise Time-Temperature Curve For Control Of Fire Tests OCTOBER 15, 2014 DURABILITY OF FIRE RESISTIVE COATINGS AND MATERIALS - UL 2431 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
20、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 This standard is intended to provide a means to measure the ability of re resistive materials to retain their re resistive properties after being subjected to various conditioning environments. The re resistive performance i
21、s determined by measuring temperatures of steel tubes, wide ange sections and plates protected by the materials. 1.2 Various types of conditioning environments are described. The conditioning environments include air erosion, a combination of wet, freeze and dry cycling, humidity, impact resistance,
22、 industrial atmosphere, salt spray, temperature stability, ultraviolet light, and vibration. 1.3 Two re exposures are dened, a normal temperature rise re and a rapid temperature rise re. The normal temperature rise re is intended to represent a fully developed interior building re. The rapid tempera
23、ture rise re is intended to represent a hydrocarbon pool re. 1.4 The conditioning environments and re exposure tests are not intended to be representative of all exposure and re conditions. With respect to re exposure, conditions vary with changes in the amount, nature, and distribution of re loadin
24、g: ventilation; compartment size and conguration; and heat conducting and dissipating characteristics of the compartment in which the re resistive material is installed. 2 General 2.1 Units of measurement 2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanat
25、ory or approximate information. 2.2 Undated references 2.2.1 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. OCTOBER 15, 2014 DURABILITY OF FIRE RESISTIVE COATINGS AND MATERIA
26、LS - UL 2431 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Glossary 3.1 For the purpose of this Standard the following denitions apply. 3.2 CONDITIONING ENVIRONMENT Exposures intended to simulate conditions potentially experienced by pr
27、otective coating systems after application to steel surfaces. 3.3 CONDITIONED INTERIOR SPACE Interior locations where the relative humidity and the temperature are controlled according to the manufacturers recommendations. The maximum recommended relative humidity is not to be more than 75 percent d
28、uring the application and curing of the re resistive material. 3.4 CONDITIONING SAMPLE(S) A maximum of two test samples that is to be or has been subjected to the conditioning environment as specied in Conditioning Environments, Section 5. 3.5 CONTROL SAMPLE A prepared sample intended to provide a p
29、erformance comparison benchmark with a test sample; unlike a test sample, a control sample is not subjected to any identied conditioning environment, such as temperature stability, humidity, air erosion or the like. 3.6 FIRE RESISTIVE MATERIAL Any material intended to extend the re resistance rating
30、 of bare structural steel. These materials include, but are not limited to, spray-applied re resistive materials (SFRMs) and paint type coatings such as mastic and intumescent coatings. 3.7 PROTECTIVE COATING SYSTEM All materials added to the steel section such as a primer, insulating coating, reinf
31、orcement mesh and surface sealer required for re resistive performance. 3.8 LIMITING TEMPERATURE TIME The time period in minutes determined by the rst occurrence steel sample(s) reaching 1000F (538C) as measured by the four thermocouples on the tube, wide ange or steel plate sample, or the time when
32、 one thermocouple reaches a temperature of 1200F (649C). The average thickness of re resistive material on each steel sample used to determine the reference period is to be within 10 percent of the standard deviation as determined from the population consisting of the average re resistive material t
33、hickness calculated for each sample used in the investigation. 3.9 SAMPLE SET The minimum number of samples required for evaluation of a specic conditioning exposure. Note: For example, a sample set for a II-A-3 condition (Indoor, Exposed Non-Controlled Temperature and Humidity Environment) will con
34、sist of 2 control samples, 2 temperature stability samples, 2U V samples, 2 High Humidity samples, 2 Air Erosion samples, 2 Impact samples and 2 Vibration samples. 3.10 STRUCTURAL STEEL SECTION A steel member used for the application of the protective coating material under investigation. These sect
35、ions may consist of steel tubes (hollow structural steel), wide ange or plate congurations. 3.11 TARGET DENSITY The density of the SFRM or other protective coating system selected for evaluation on application to the steel section. OCTOBER 15, 2014 DURABILITY OF FIRE RESISTIVE COATINGS AND MATERIALS
36、 - UL 2431 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.12 TARGET THICKNESS A thickness of the protective coating system selected for evaluation on application to the steel section. The thickness of protective coating system shall be s
37、ufficient such that the average temperature of the control sample reaches 1000F (538C) in not less than 60 minutes as measured by the four thermocouples within the steel sample. The maximum temperature at the time when the average temperature is 1000F (538C) shall not be greater than 1200F (649C). 3
38、.13 UNCONDITIONED INTERIOR SPACE Interior locations where conditions do not meet requirements for conditioned interior space. PERFORMANCE 4 General 4.1 General 4.1.1 The steel section used for the conditioning sample(s) and the control sample(s) for a specic conditioning environment shall be the sam
39、e size. 4.2 Steel tube sections 4.2.1 Each steel tube section shall bea6x6x3/16 inches hollow structural section as described in the Manual of Steel Construction, published by AISC. The tube sample shall consist of a 24 inches (610 mm) long steel section with a 0.25 inch (6.4 mm) thick steel plate a
40、t each end. Each steel tube section and both steel plates shall be coated with the protective coating system under investigation. The area of the steel plates shall be sufficient to provide resistance to the expansion of the protective coating system applied on the steel section. The ends of the spe
41、cimen, including the means for restraint, are to be given sufficient thermal insulation to prevent appreciable direct heat transfer through the ends of the column. 4.2.2 Wide ange sections 4.2.2.1 Wide ange steel sections shall consist of a 24 inches (610 mm) long steel section with a 0.25 inch (6.4
42、 mm) thick steel plate at each end. Each wide ange section and both steel plates shall be prepared with the protective coating system under investigation. The area of the steel plates shall be sufficient to provide resistance to the expansion of the protective coating system applied on the steel sec
43、tion. The ends of the specimen, including the means for restraint, are to be given sufficient thermal insulation to prevent appreciable direct heat transfer through the ends of the column. OCTOBER 15, 2014 DURABILITY OF FIRE RESISTIVE COATINGS AND MATERIALS - UL 2431 7UL COPYRIGHTED MATERIAL NOT AUT
44、HORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.2.3 Steel Plates 4.2.3.1 Steel plates of minimum8x8x3/16 inches thick shall be used while conducting the Temperature stability, UV & High humidity portions of the environmental exposures as reference in Section 5. A maximu
45、m of 0.5 inch of the steel plate edges shall be treated with an anti-corrosion material. Where necessary, reinforcement shall be used to ensure bond of the material to the steel plate. 4.2.4 Thermocouples 4.2.4.1 Each steel tube and wide ange section shall include a set of four thermocouples of the
46、same gauge and response time. Such thermocouples shall be a maximum 14 gauge and minimum 18 gauge of Type K and fusion welded at the end to be in contact with the test specimen. 4.2.4.2 Each steel plate section shall include a set of four thermocouples of the same gauge and response time. 4.2.4.3 A
47、thermocouple assembly may be used in lieu of the thermocouple specied in 4.1.4.1. Each thermocouple assembly shall consist of thermocouple wires having a diameter of not more than 0.03 inch with each thermocouple wire brazed to the center of the face of a copper disk 0.5 inch in diameter and 0.01 in
48、ch thick. 4.2.4.4 Each thermocouple or thermocouple assembly shall be located under a minimum2x2inch pad as specied in Appendix A and secured to the surface of the specimen at the required position. The thermocouples shall be located as shown in Figures 4.1 4.6. This is generated text for gtxt. Figu
49、re 4.1 Steel tube sample thermocouple locations OCTOBER 15, 2014 DURABILITY OF FIRE RESISTIVE COATINGS AND MATERIALS - UL 2431 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 4.2 Steel wide ange sample thermocouple locations Figure 4.3 Steel plate sample thermocouple locations OCTOBER 15, 2014 DURABILITY OF FIRE RESISTIVE COATINGS AND MATERIALS - UL 2431 9UL COPYRIGHTE
