意义和目的
3.1 A number of laboratory procedures are used to evaluate the effectiveness of flame retardant and refractory treatments and coatings. 一般来说, these methods measure three stages of fire development: (1) ignition; (2) Flame spread (the growth rate of the fire); (3) Fire extent. While all three are extremely important, flame spread has been recognized as a major factor relevant for testing flame retardant coatings.

3.2 Flame spread rating based on test method E84 has gained general acceptance from regulatory authorities, but such large-scale testing is rarely practical during the development or modification of flame retardant-based coatings.

3.3 The test method provides the relative flame spread of the experimental coating using small specimens under conditions established in a 2-foot tunnel. By experimentally calibrating 2-foot tunnels with a similar test method E84 grade flame retardant paint, the results obtained from this test method can be used to screen the suitability of the coating for testing in test method E84 tunnels.

3.3.1 The test method is intended as an experimental tool for evaluating experimental coatings for further development. The results of this test method are not directly related to, or implied by, the results of the test method E84 tunnel.

3.3.2 The results obtained by this test method cannot by itself be used as an accurate predictor of the performance in test method E84 and shall not be used to certify any class of flame spread performance.

美国材料试验协会D 3806-98-2019 “阻燃涂料的小规模评估 (2-足隧道法)”

范围
1.1 This test method determines the protection provided by the coating to its substrate and the comparative combustion characteristics of the coating by assessing the flame spread over the surface during ignition under controlled conditions in a small tunnel. This sets the stage for comparing the surface combustion characteristics of different coatings without specifically considering all end-use parameters that may affect the surface combustion characteristics under real fire conditions.

1.2 In addition to the experimental flame spread rate, panel weight consumed, time of combustion and afterglow, coke size and index, and expansion height can also be measured in this test. 然而, a relationship between these measures should not be assumed.

1.3 This standard is used to determine certain fire test responses of materials, products or components to heat and flame under controlled conditions by using results obtained from fire test response standards. The results obtained using this standard do not in themselves constitute a measure of fire hazard or fire risk.

1.4 以 SI 单位表示的值应被视为标准值. 括号内的数值仅供参考.

1.5 本标准用于测量和描述材料的反应, 在受控条件下加热和燃烧的产品或组件, 但其本身并不包含材料火灾危险或火灾风险评估所需的所有因素, 实际火灾条件下的产品或部件.

美国材料试验协会D 3806-98-2019 “阻燃涂料的小规模评估 (2-足隧道法)”

1.6 Fire testing is inherently dangerous. Appropriate personnel and property protection measures should be taken when these tests are carried out.

1.7 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全机制, 健康和环境实践，并在使用前确定监管限制的适用性.

1.8 本国际标准是根据《关于制定国际标准的原则的决定》中确立的国际公认的标准化原则制定的, 世界贸易组织贸易技术壁垒委员会发布的指南和建议.