1.1 本规范涵盖了在以下温度范围内操作的表面上使用的多孔玻璃隔热材料的组成、尺寸、尺寸和物理特性:−450和800°F(−268和427°C）。在250至800°F（121至427°C）的温度范围内应用时，可能需要特殊的管道保温制造或技术，或两者兼而有之。有关在该温度范围内使用的制造和应用程序的建议，请联系制造商。对于特定应用，实际温度限值应由制造商和买方商定。 1.2 预计半段或多层系统内层的单层管道保温层有可能在250°F（122°C）以上出现应力裂纹。 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 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和健康实践，并确定监管限制的适用性。

1.1 This specification covers the composition, sizes, dimensions, and physical properties of cellular glass thermal insulation intended for use on surfaces operating at temperatures between −450 and 800°F (−268 and 427°C). It is possible that special fabrication or techniques for pipe insulation, or both, will be required for application in the temperature range from 250 to 800°F (121 to 427°C). Contact the manufacturer for recommendations regarding fabrication and application procedures for use in this temperature range. For specific applications, the actual temperature limits shall be agreed upon between the manufacturer and the purchaser. 1.2 It is anticipated that single-layer pipe insulation in half sections or the inner layer of a multilayer system have the potential to exhibit stress cracks above 250°F (122°C). 1.3 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. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.