1.1 本规范涵盖了矿物纤维（岩石、矿渣或玻璃）金属网覆盖和工业型毯式和毯式管道绝缘材料（通常直径为24英寸（610毫米）或更大）的成分、尺寸和物理性质。它用于工作温度低于环境温度0°F（−18°C）的冷却表面，以及工作温度高达1200°F（649°C）的大直径容器和储罐膨胀节上的加热表面。超出实际使用温度的具体应用应由制造商和买方商定。 1.2 为了获得令人满意的性能，应在低于环境温度的应用中使用适当安装的保护性蒸汽阻滞剂或屏障，以减少湿气/水蒸气穿过或绕过隔热层向较冷表面的移动。不使用蒸汽缓凝剂会导致绝缘和系统损坏。参考实践 C755 供选择水蒸气缓凝剂时考虑和指导 C1423 有关选择护套材料的具体指导。尽管蒸汽阻滞剂性能不是本规范的一部分，但规范中要求的性能 C1136 与应用或性能相关。 1.3 毯内纤维的取向主要平行于加热表面。本规范不包括预制管道和储罐包裹绝缘材料，其中绝缘材料已被切割和制造以提供垂直于加热表面的纤维取向。 1.4 本标准并不旨在提供小时额定消防系统的性能要求。向制造商咨询适当的系统。1.5 只有当买方在美国的合同或订单中指定时，才参见本标准中各部分修改的补充要求。美国使用的军用规格。国防部、海军部和海军系统司令部。 1.6 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准。 1.7 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 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》中确立的国际公认的标准化原则制定的。

1.1 This specification covers the composition, dimensions, and physical properties of mineral fiber (rock, slag, or glass) metal mesh covered and industrial type blanket and blanket-type pipe insulation (typically on 24 in. (610 mm) diameters or larger)). Its use is for cooled surfaces at temperatures operating below ambient to 0°F (−18°C) and on heated surfaces on expansion joints to large diameter vessels and tanks operating at temperatures up to 1200°F (649°C). Specific applications outside the actual use temperatures shall be agreed upon between the manufacturer and purchaser. 1.2 For satisfactory performance, properly installed protective vapor retarders or barriers shall be used on below ambient temperature applications to reduce movement of moisture/water vapor through or around the insulation towards the colder surface. Failure to use a vapor retarder can lead to insulation and system damage. Refer to Practice C755 for considerations in the selection of water vapor retarders and to Guide C1423 for specific guidance in selecting jacketing materials. Although vapor retarder properties are not part of this specification, properties required in Specification C1136 are pertinent to applications or performance. 1.3 The orientation of the fibers within the blanket is primarily parallel to the heated surface. This specification does not cover fabricated pipe and tank wrap insulation where the insulation has been cut and fabricated to provide fiber orientation that is perpendicular to the heated surface. 1.4 This standard does not purport to provide the performance requirements of hourly-rated fire systems. Consult the manufacturer for the appropriate system. 1.5 See Supplementary Requirements for modifications to sections in this standard only when specified by purchaser in the contract or order from the U.S. Military specifications utilized by the U.S. Department of Defense, Department of the Navy, and the Naval Systems Command. 1.6 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. 1.7 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.