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Calculation of low-cycle fatigue in accordance with the national standard and strength codes

机译：根据国家标准和强度规范计算低周疲劳

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Over the most recent 15 years, the Russian power industry has largely relied on imported equipment manufactured in compliance with foreign standards and procedures. This inevitably necessitates their harmonization with the regulatory documents of the Russian Federation, which include calculations of strength, low cycle fatigue, and assessment of the equipment service life. An important regulatory document providing the engineering foundation for cyclic strength and life assessment for high-load components of the boiler and steamline of a water/steam circuit is RD 10-249-98:2000: Standard Method of Strength Estimation in Stationary Boilers and Steam and Water Piping. In January 2015, the National Standard of the Russian Federation 12952-3:2001 was introduced regulating the issues of design and calculation of the pressure parts of water-tube boilers and auxiliary installations. Thus, there appeared to be two documents simultaneously valid in the same energy field and using different methods for calculating the low-cycle fatigue strength, which leads to different results. In this connection, the current situation can lead to incorrect ideas about the cyclic strength and the service life of high-temperature boiler parts. The article shows that the results of calculations performed in accordance with GOST R 55682.3-2013/EN 12952-3: 2001 are less conservative than the results of the standard RD 10-249-98. Since the calculation of the expected service life of boiler parts should use GOST R 55682.3-2013/EN 12952-3: 2001, it becomes necessary to establish the applicability scope of each of the above documents.
机译：在最近的15年中，俄罗斯电力行业在很大程度上依靠符合国外标准和程序制造的进口设备。这不可避免地使其与俄罗斯联邦的法规文件保持一致，其中包括强度计算，低周疲劳和评估设备使用寿命。 RD 10-249-98：2000：固定式锅炉和蒸汽强度估算的标准方法，这是重要的法规文件，为锅炉和水/蒸汽回路的蒸汽管线的高负荷组件的循环强度和寿命评估提供了工程基础。和水管。 2015年1月，引入了俄罗斯联邦国家标准12952-3：2001，规范了水管锅炉及其辅助装置的压力部件的设计和计算问题。因此，似乎有两个文档在相同的能量场中同时有效，并且使用不同的方法来计算低周疲劳强度，这导致了不同的结果。在这种情况下，当前的状况可能导致对高温锅炉部件的循环强度和使用寿命的错误认识。该文章显示，根据GOST R 55682.3-2013 / EN 12952-3：2001执行的计算结果不如标准RD 10-249-98保守。由于锅炉部件的预期使用寿命的计算应使用GOST R 55682.3-2013 / EN 12952-3：2001，因此有必要确定上述每个文件的适用范围。

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