1.1 本规程旨在为用作表面处理或与奥氏体不锈钢接触的隔热系统的一部分的隔热材料的搬运、运输、装运、储存、接收和应用提供指导和指导。 1.2 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。 1.3 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。 ====意义和用途====== 4.1 作为与奥氏体不锈钢接触的隔热系统的一部分使用的隔热材料有可能受到水溶性腐蚀离子的污染，如果允许水溶性腐蚀离子到达不锈钢表面，则可能导致外部应力腐蚀开裂（ESCC）。因此，在制造、搬运、运输、储存和应用的所有阶段，减少此类绝缘材料与水溶性腐蚀性离子化合物的接触非常重要。在制造过程中，应采取预防措施，尽量减少材料中的水溶性腐蚀离子含量和表面污染。一旦制造完成，在搬运、运输、装运、储存、接收和应用过程中必须小心，以避免水通过绝缘材料输送到不锈钢表面的腐蚀性离子污染。 本规程提出了一些标准，如果遵循这些标准，将最大限度地降低与绝缘材料应用相关的ESCC风险。然而，必须强调的是，由于存在许多可变因素，在任何情况下都不能保证完全免于ESCC，即使在遵循这一做法的指导下。 4.2 在保温系统安装后及其整个使用寿命内，持续保护保温和不锈钢表面免受湿气和污染具有重要意义。在役污染可能来自多种来源；例如，来自空气污染物、雨水或盐雾、定期喷水灭火系统测试、清洗- 下降或过程泄漏。应选择防风雨护套系统和适当应用，以在预期使用环境中提供长期保护。 4.3 应定期检查和维护整个绝缘系统。应重新测试或立即更换怀疑受到污染的绝缘材料。应避免冲洗绝缘管道和设备。在可能的情况下，保护涂层或饰面应直接应用于不锈钢表面，作为防腐的主要来源。

1.1 This practice is intended to provide guidance and direction in the handling, transporting, shipping, storage, receiving, and application of thermal insulating materials to be used as a surface treatment or as part of the thermal insulation system in contact with austenitic stainless steel. 1.2 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. 1.3 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. ====== Significance And Use ====== 4.1 Insulations that are used as a part of the thermal insulation system in contact with austenitic stainless steels have the potential to become contaminated with water soluble corrosive ions which, in turn, if permitted to reach the stainless steel surface, are possible to contribute to external stress corrosion cracking (ESCC). Therefore, it is important to reduce the exposure of such insulating materials to water-soluble corrosive ion compounds at all stages of manufacture, handling, shipping, storage, and application. During manufacture, precautions shall be taken to minimize water soluble corrosive ion content, both in the material and as surface contamination. Once the manufacture is complete, care must be exercised during handling, transporting, shipping, storage, receiving, and application to avoid contamination with corrosive ions that can be transported by water through the insulation materials onto the stainless steel surface. This practice presents criteria which, if followed, will minimize the risks of ESCC associated with the application of insulation materials. It must be emphasized, however, that because of the many variable factors present, complete freedom from ESCC can not be assured under all circumstances, even when following the guidance of this practice. 4.2 Continued protection of the insulation and the stainless steel surface from moisture and contamination after the insulation system is installed and over its entire service life is of significant importance. In-service contamination has the potential to occur from many sources; for example, from airborne contaminates, rain or salt spray, periodic fire sprinkler system tests, wash-downs, or process leakage. Weather barrier jacketing systems and proper application shall be chosen to provide long-term protection in the intended use environment. 4.3 The entire insulation system shall be periodically inspected and maintained. Insulation that is suspected of contamination shall be retested or immediately replaced. Wash down of insulated pipe and equipment shall be avoided. Whenever possible, protective coatings or finishes shall be applied directly to the stainless steel surface as the primary source of corrosion protection.