1.1 本试验方法通过评估在受控条件下在小隧道内点火时火焰在表面上的传播，确定涂层对其基材的保护以及涂层的比较燃烧特性。这为比较不同涂层的表面燃烧特性奠定了基础，而无需特别考虑可能影响实际火灾条件下表面燃烧特性的所有最终用途参数。 1.2 除了实验火焰传播速率外，本试验还可以测量所消耗的面板重量、余燃和余辉时间、焦炭尺寸和指数以及膨胀高度。然而，不应假设这些测量值之间存在关系。 1.3 本标准用于通过使用耐火试验响应标准获得的结果，确定材料、产品或组件在受控条件下对热量和火焰的某些耐火试验响应。使用本标准获得的结果本身并不构成火灾危险或火灾风险的度量。 1.4 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.5 本标准用于测量和描述材料、产品或组件在受控条件下对热量和火焰的响应，但其本身并不包括在实际火灾条件下对材料、产品或组件进行火灾危险或火灾风险评估所需的所有因素。 1.6 防火测试本身就很危险。在进行这些测试时，应采取适当的人员和财产保护措施。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 许多实验室程序用于评估阻燃和耐火处理和涂层的有效性。通常，这些方法测量火灾发展的三个阶段:( 1. )点火；( 2. )火焰蔓延（火焰增长率）；和( 3. )火灾程度。虽然这三个因素都极为重要，但火焰传播已被视为测试防火涂料的主要因素。 3.2 基于试验方法的火焰传播额定值 E84 已获得监管机构的普遍认可，但在阻燃涂料的开发或改造过程中，此类大规模测试很少实用。 3.3 本试验方法提供了在第2.2.1.1.1.1.1.1.1.1.2.1.1.1.1.1.1.1.1.1.2.1.1.1.1.2.1.1.1.1.1.1.1- 人行隧道。通过使用类似测试方法对2英尺隧道进行实验校准 E84 -额定阻燃涂料，通过本试验方法获得的结果可用于筛选适用于本试验方法中试验的涂料 E84 地下通道 3.3.1 本试验方法旨在作为评估实验涂层的实验工具，以供进一步开发。本试验方法和试验方法的结果没有直接相关性 E84 隧道已经建造或暗示。 3.3.2 通过该测试方法获得的结果本身并不能准确预测测试方法的性能 E84 不得用于任何类别火焰传播性能的认证。

1.1 This test method determines the protection a coating affords its substrate, and the comparative burning characteristics of coatings by evaluating the flame spread over the surface when ignited under controlled conditions in a small tunnel. This establishes a basis for comparing surface-burning characteristics of different coatings without specific consideration of all the end-use parameters that might affect surface-burning characteristics under actual fire conditions. 1.2 In addition to the experimental flame spread rate, the weight of panel consumed, time of afterflaming and afterglow, char dimensions and index, and height of intumescence can be measured in this test. However, a relationship should not be presumed among these measurements. 1.3 This standard is used to determine certain fire-test responses of materials, products, or assemblies to heat and flame under controlled conditions by using results obtained from fire-test response standards. The results obtained from using this standard do not by themselves constitute measures of fire hazard or fire risk. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions. 1.6 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 A number of laboratory procedures are used to evaluate the effectiveness of fire-retardant and fire-resistant treatments and coatings. In general, these methods measure the three stages of fire development: ( 1 ) ignition; ( 2 ) flame spread (rate of growth of the fire); and ( 3 ) conflagration extent. While all three are of extreme importance, flame spread has been recognized as the main factor associated with testing fire-retardant coatings. 3.2 Flame spread ratings based upon Test Method E84 have acquired common acceptance by regulatory agencies, but such large-scale tests are seldom practical during the development or modification of a fire-retardant coating. 3.3 This test method provides the relative flame spread of experimental coatings using small test specimens under the conditions established in the 2-foot tunnel. By experimentally calibrating the 2-foot tunnel with similar Test Method E84 -rated fire-retardant paint, results obtained by this test method can be used to screen coatings for suitability for testing in the Test Method E84 tunnel. 3.3.1 This test method is intended as an experimental tool in evaluating experimental coatings for further development. No direct correlation of results from this test method and the Test Method E84 tunnel have been made or are implied. 3.3.2 The results obtained by this test method do not in themselves act as an accurate predictor of performance in Test Method E84 and shall not be used for the purpose of certification to any class of flame spread performance.