1.1 本规范涵盖了在–297°F（–183°C）至300°F（149°C）的表面上用作隔热材料的未抛光预成型硬质多孔聚异氰脲酸酯塑料材料的类型、物理性能和尺寸。对于特定应用，实际温度限值应由制造商和买方商定。 1.2 本规范仅涵盖“聚氨酯改性聚异氰脲酸酯”隔热层，通常称为“聚异氰尿酸酯”隔热层。本标准不包括所有聚氨酯改性材料。聚氨酯改性聚异氰脲酸酯和其他聚氨酯材料相似，但在某些使用条件下，这些材料的性能会有所不同。 1.3 本标准设计为材料规范，而非设计文件。 物理性能要求因应用和温度而异。在低于–70°F（–51°C）的温度下，多异氰尿酸盐绝缘层在使用温度下的物理性能尤为重要。低于–70°F（–51°C）时，制造商和买方必须就需要哪些额外的低温性能性能达成一致，以确定材料是否能够充分适用于特定应用。 1.4 本标准阐述了使用臭氧消耗潜能值为0（ODP 0）的发泡剂制造的未抛光预成型硬质多孔聚异氰脲酸酯隔热材料的要求。 1.5 除了 6.2 和 8.2 – 8.4 ，与制造零件的尺寸和形状有关，以及 16.1 本标准规范中的要求适用于隔热材料制造商提供的包形式的聚异氰脲酸酯隔热材料。 1.6 当由具有管辖权的机构采用时，许多应用中涉及防火特性的规范规范了本规范所涵盖的隔热材料的使用。防火性能受工作、项目或其他规范的控制，其中规范或政府法规不适用。 1.7 以英寸-磅单位表示的值应视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准值。 1.8 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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.9 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers the types, physical properties, and dimensions of unfaced, preformed rigid cellular polyisocyanurate plastic material intended for use as thermal insulation on surfaces from –297°F (–183°C) to 300°F (149°C). For specific applications, the actual temperature limits shall be agreed upon by the manufacturer and purchaser. 1.2 This specification only covers “polyurethane modified polyisocyanurate” thermal insulation which is commonly referred to as “polyisocyanurate” thermal insulation. This standard does not encompass all polyurethane modified materials. Polyurethane modified polyisocyanurate and other polyurethane materials are similar, but the materials will perform differently under some service conditions. 1.3 This standard is designed as a material specification, not a design document. Physical property requirements vary by application and temperature. At temperatures below –70°F (–51°C) the physical properties of the polyisocyanurate insulation at the service temperature are of particular importance. Below –70°F (–51°C) the manufacturer and the purchaser must agree on what additional cold temperature performance properties are required to determine if the material can function adequately for the particular application. 1.4 This standard addresses requirements of unfaced preformed rigid cellular polyisocyanurate thermal insulation manufactured using blowing agents with an ozone depletion potential of 0 (ODP 0). 1.5 Except 6.2 and 8.2 – 8.4 , which are related to the size and shape of fabricated parts, and 16.1 , which is related to the storage of fabricated parts, the requirements in this standard specification apply to the polyisocyanurate insulation in the form of buns supplied by the insulation manufacturer. 1.6 When adopted by an authority having jurisdiction, codes that address fire properties in many applications regulate the use of the thermal insulation materials covered by this specification. Fire properties are controlled by job, project, or other specifications where codes or government regulations do not apply. 1.7 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. 1.8 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. 1.9 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.