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燃化石燃利动力机组的中间负荷运行或快速启动和周期停运要求能应付核动力设备最近的发展、电力需求的变化、燃料供应情况以及日益加强对环境污染的控制。为了适合这种倾向就有必要评定锅炉部件的蠕变和疲劳强度。最近已发表了美国机械工程师学会(ASME)锅炉和压力容器规范第Ⅲ部分第Ⅰ节例1592-7核动力装置组件的设计。该规范所规定的强度评定标准同样也适用于锅炉部件.本文所述的强度评定方法是以ASME 锅炉部件以及牵涉到应用的一些问题的规范为基础的。本文也是对炉膛水冷壁、混合球、锅炉循环泵罩壳、汽包和集箱三通等的锅炉主要受压部件的分析的一个简述.
The mid-load operation or quick start-up and periodic shutdown requirements of fossil fuel-fired power units are able to cope with recent developments in nuclear power equipment, changes in electricity demand, fuel supplies and increasing environmental pollution control. In order to suit this tendency it is necessary to assess the creep and fatigue strength of boiler components. Recently, the design of Part 1592-7 Nuclear Power Plant Components of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Section III has been published. The standards for strength assessment also apply to boiler components.The strength assessment methods described in this document are based on ASME boiler components and specifications that address some of the issues that apply. This article is also a brief overview of the main pressurized components of boilers such as hearth waterwalls, mixing balls, boiler circulation pump housings, steam drums and header tees.