1.1 本规范涵盖浸有煤焦油的玻璃毡，拟与符合规范适当要求的煤焦油沥青一起使用 D450/D450米 在组合屋顶施工和防水系统施工中。 1.2 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。 1.3 以下安全危险警告仅适用于测试方法部分第节 8. ，本规范: 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。 1.4 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。

1.1 This specification covers glass felt impregnated with coal-tar intended to be used with coal-tar pitch conforming to the appropriate requirements of Specification D450/D450M in construction of built-up roofs and in the construction of waterproofing systems. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 The following safety hazards caveat pertains only to the Test Methods portion, Section 8 , of this specification: 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. 1.4 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.