本推荐规程（RP）旨在解释完整性操作窗口（IOW）对过程安全管理的重要性，并指导用户如何为过程设施建立和实施IOW计划。IOW是确定的工艺变量限值（例如，操作设备参数、压力或温度限值），如果操作在预定时间段内偏离限值，可能会影响设备的完整性。其明确目的是将可能导致安全壳失效的意外设备退化降至最低。本文件的目的并非提供行业中多种类型的工艺装置可能需要IOW的特定IOW或操作变量的完整列表（尽管文本中提供了一些示例，附录a中包含了一些示例工艺装置的工艺变量列表），而是为用户提供有关IOWs开发和实施工作流程的信息和指导，以帮助加强每个工艺单元的机械完整性（MI）计划。 第二版包括一个新的附录D，成功实施IOW的障碍，作为帮助改善行业安全和可持续性的一种方式。

The purpose of this recommended practice (RP) is to explain the importance of integrity operating windows (IOWs) for process safety management and to guide users in how to establish and implement an IOW program for process facilities. IOWs are established limits of process variables (operating equipment parameters, pressure or temperature limits, for example) that can affect the integrity of the equipment if the operation deviates from the limits for a predetermined period of time. Their express purpose is to minimize unexpected equipment degradation that could lead to loss of containment. It is not the intent of this document to provide a complete list of specific IOWs or operating variables that might need IOWs for the numerous types of process units in the industry (though some examples are provided in the text and a list of process variables for some example process units in included in Annex A), but rather to provide the user with information and guidance on the work process for the development and implementation of IOWs to help strengthen the mechanical integrity (MI) program for each process unit. This second edition includes a new Annex D, Barriers to Successful IOW Implementation, as a way to assist in improving industry safety and sustainability.