本标准涵盖的蒸汽系统定义为包含蒸汽发生器或其他蒸汽源、蒸汽分配网络和最终使用设备的系统。热电联产和发电组件也可能是系统的组成部分（燃气轮机、背压式蒸汽轮机、冷凝式蒸汽轮机）。如果收集并返回蒸汽冷凝液，冷凝液返回子系统是蒸汽系统的一部分。本标准规定了执行和报告蒸汽系统能量评估（以下简称评估）结果的要求，该评估考虑了整个系统，从能量输入到这些输入结果所执行的工作。符合本标准的评估无需以同等权重处理工业设施内的每个单独系统组件或特定系统； 然而，它应足够全面，以确定改善蒸汽系统整体能源性能的主要机会。本标准主要适用于工业设施，但大多数规定程序可用于其他设施，如机构和商业部门的设施。

This Standard covers steam systems that are defined as a system containing steam generator(s) or other steam source(s), a steam distribution network and end-use equipment. Cogeneration and power generation components may also be elements of the system (gas turbines, backpressure steam turbines, condensing steam turbines). If steam condensate is collected and returned, the condensate return subsystem is a part of the steam system.This Standard sets the requirements for conducting and reporting the results of a steam system energy assessment (hereafter referenced as an assessment) that considers the entire system, from energy inputs to the work performed as the result of these inputs. An assessment meeting this standard need not address each individual system component or specific system within an industrial facility with equal weight; however, it shall be sufficiently comprehensive to identify the major opportunities for improving the overall energy performance of the steam system. This Standard is designed to be applied primarily at industrial facilities, but most of the specified procedures can be used in other facilities such as those in the institutional and commercial sectors.