汽轮机热验收试验规则 第 4 部分：常规试验

[中文适用范围]： 本最终草案国际标准为正式出版前最长6周的预发布版本，其投票期为2026年5月29日至2026年7月10日，期间可购买。购买本FDIS者将同时自动获得正式出版版本。 IEC 60953-4:2026旨在为汽轮机的常规试验制定补充标准（SS）。该补充标准遵循IEC 60953-0的指导原则，属于60953系列标准的一部分。内容涵盖汽轮机常规试验的特殊试验要求、结果计算与分析，以及相对性能监督的计算示例。标准中规定了试验的准备、实施、结果评估与解读的基本原则，并明确了试验重复性的确定方法。 常规试验指在整个汽轮机系统生命周期内定期监测性能变化并诊断缺陷。其主要目的包括：（a）依据性能数据制定维护停机计划；（b）识别或诊断汽轮机特定区域或汽轮机循环系统中的性能变化；（c）定期监测系统性能状态。 本补充标准适用于各类型、各级别及各类应用、使用过热蒸汽或饱和蒸汽的汽轮机，且覆盖不同精度要求的常规试验。除非相关各方事先达成书面协议，不建议将本标准用于验收试验。 本文件适用于从事运行、公用事业、维护、设计或长期性能监督相关工作的工程师。为便于现场工程师使用，补充标准中的条款设计注重可操作性，并提供了若干典型计算示例。同时，本标准充分考虑了试验成本，建议采用简化的试验程序，以最小化测试仪器和人员投入。预期结果侧重于相对精度与较宽的测量不确定度范围，而非验收试验级别的高精度结果；因此，本补充标准特别强调试验结果的重复性，而非试验不确定度。 [外文原描述]： This Final Draft International Standard is an up to 6 weeks' pre-release of the official publication. It is available for sale during its voting period: 2026-05-29 to 2026-07-10. By purchasing this FDIS now, you will automatically receive, in addition, the final publication. IEC 60953-4:2026 is intended to establish a Supplementary Standard (SS) for routine test of steam turbines. The rules given in the SS follow the guidance given in IEC 60953-0, of course, it is one part of the 60953 series as well, It contains amendments and supplements regarding the special test requirement, the result calculation analysis, and example calculation for supervision of relative performance by routine testing of steam turbines. General principles for the preparation, performance, evaluation, and interpretation of test results and the determination of the test repeatability are given in the SS. The routine test means to periodically monitor performance change and diagnose defect throughout the life of steam turbine system. Major purpose of routine test will be: a) provide guidance in scheduling maintenance outage on the basis of performance. b) detect or diagnose performance change in specific area of the turbine or turbine cycle. c) monitor the performance status periodically. This SS is applicable to routine testing covering a wide range of accuracy on steam turbines of every types, rating and application, operating with superheated or saturated steam. The application of this standard to acceptance tests is not recommended unless the parties involved have prior written agreement. This document is intended to be used by engineers involved in operating, utility, maintenance, design or concerning about long-term performance supervision. The clause in this SS is intended to be used easily for field engineers, so several typical calculation examples are provided. This SS takes into account the cost of the test, so specific simplified test procedure are recommended to minimize test instrumentation and personnel. Relative accuracy and wide uncertainty range rather than acceptance test level result are expected. The repeatability of test result rather than test uncertainty is emphasized here in this SS.