1.1 本规范涵盖用于形成标准管道和管道尺寸的空心圆柱体的矿物纤维绝缘材料。使用经过模压或精密v型槽的矿物纤维管道绝缘材料，一个或多个壁纵向分裂，用于温度高达1400°F（760°C）的管道。 1.2 为了获得令人满意的性能，在低于环境温度的应用中使用正确安装的保护性蒸汽缓凝剂或屏障，以减少湿气通过隔热层或其周围向较冷表面移动。 不使用防潮层会导致绝缘和系统损坏。参考实践 C921号机组 以帮助材料选择。 1.3 本规范不包括垂直定向纤维绝缘辊、非精密或手动刻痕块或板或用作管道绝缘的柔性板或毯子等柔性矿物纤维包装产品。 1.4 以英寸-磅单位表示的数值视为标准值。括号中给出的值是数学转换为SI单位，仅供参考，不被视为标准单位。 1.5 对于海军海上系统司令部（NAVSEA）的验收，材料还必须符合补充要求。看见 附录A1 本标准的要求。 1.6 以下安全隐患警告适用于测试方法部分，第节 11 ，仅限: 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。

1.1 This specification covers mineral fiber insulation produced to form hollow cylinders for standard pipe and tubing sizes. Use mineral fiber pipe insulation that has been either molded or precision v-grooved, with one or more walls split longitudinally for use on pipe temperatures up to 1400°F (760°C). 1.2 For satisfactory performance, use properly installed protective vapor retarders or barriers on sub-ambient temperature applications to reduce movement of moisture through or around the insulation to the colder surface. Failure to use a vapor barrier can lead to insulation and system damage. Refer to Practice C921 to aid material selection. 1.3 Flexible mineral fiber wrap products such as perpendicular-oriented fiber insulation rolls, non-precision or manually scored block or board, or flexible boards or blankets used as pipe insulation, are not covered by this specification. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.5 For Naval Sea Systems Command (NAVSEA) acceptance, materials must also comply with Supplemental Requirements. See Annex A1 of this standard. 1.6 The following safety hazards caveat applies to the test methods portion, Section 11 , only: 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.