1.1 这是火灾测试响应标准。 1.2 本耐火试验响应标准包含适用于用于套管或管道（包括热缩管）的电绝缘材料的各种试验。 1.2.1 试验方法C和D仅适用于热收缩管。 1.3 在裁判决定中使用国际单位制规定的数值；见IEEE/ASTM SI-10。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.4 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。 1.5 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。 1.6 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。 1.7 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====== 5.1 试验方法A是要求的易燃性试验:电气绝缘用交联氯化聚烯烃热收缩管（规范 D2903 )，电气绝缘用交联聚偏氟乙烯热收缩管（规范 D3144页 )和电气绝缘用交联和非交联聚氯乙烯热收缩管（规范 D3150 ). 5.2 试验方法A也是用于电气绝缘的非刚性氯乙烯聚合物管的易燃性试验之一（在试验方法中 D876 )，电气绝缘用经处理的软管（试验方法 D350 )，和热量- 电气用收缩管（试验方法 D2671 ). 5.3 试验方法B是另一种易燃性试验（与试验方法A一起），用于电气绝缘用经处理的软管（试验方法 D350 ). 5.4 试验方法C和D是用于电气用热收缩管的其他易燃性试验（连同试验方法A）（试验方法 D2671 ). 在这两种测试中，电绝缘材料均配有金属芯。电绝缘材料在收缩后进行测试，但使用不同的心轴。 5.5 在这些试验方法中，试样经受一组或多组特定的实验室试验条件。如果替换了不同的测试条件或结束- 使用条件发生变化时，通过本试验或从本试验中预测测得的火灾试验响应特性的变化并不总是可能的。因此，结果仅适用于本程序中描述的火灾试验暴露条件。

1.1 This is a fire-test-response standard. 1.2 This fire test response standard contains various tests applicable to electrical insulation materials used for sleeving or for tubing (including heat-shrinkable tubing). 1.2.1 Test methods C and D are applicable to heat-shrinkable tubing only. 1.3 Use the values stated in SI units in referee decisions; see IEEE/ASTM SI-10. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.4 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. 1.5 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.6 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. 1.7 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 ====== 5.1 Test Method A is the required flammability test for: crosslinked chlorinated polyolefin heat-shrinkable tubing for electrical insulation (Specification D2903 ), crosslinked poly(vinylidene fluoride) heat-shrinkable tubing for electrical insulation (Specification D3144 ), and crosslinked and noncrosslinked poly(vinyl chloride) heat-shrinkable tubing for electrical insulation (Specification D3150 ). 5.2 Test Method A is also one of the flammability tests used for nonrigid vinyl chloride polymer tubing used for electrical insulation (in Test Methods D876 ), flexible treated sleeving used for electrical insulation (Test Methods D350 ), and heat-shrinkable tubing for electrical use (Test Methods D2671 ). 5.3 Test Method B is another flammability test (together with Test Method A) used for flexible treated sleeving used for electrical insulation (Test Methods D350 ). 5.4 Test Methods C and D are other flammability tests (together with Test Method A) used for heat-shrinkable tubing for electrical use (Test Methods D2671 ). In both tests the electrical insulating material is fitted with a metallic core. The electrical insulating material is tested after shrinking, but using different mandrels. 5.5 In these test methods, the test specimens are subjected to one or more specific sets of laboratory test conditions. If different test conditions are substituted or the end-use conditions are changed, it is not always possible by or from this test to predict changes in the fire-test-response characteristics measured. The results are therefore valid only for the fire-test-exposure conditions described in this procedure.