火电厂在役机组铸钢安全阀质量评估与性能分析

华电技术 ›› 2019, Vol. 41 ›› Issue (9): 72-75.

火电厂在役机组铸钢安全阀质量评估与性能分析

华电电力科学研究院有限公司，杭州〓310030

出版日期:2019-09-25 发布日期:2019-10-18

Quality evaluation and performance analysis of WC9 cast steel safety valve for inservice units in a thermal power plant

Huadian Electric Power Research Institute Company Limited,Hangzhou 310030, China

Online:2019-09-25 Published:2019-10-18

摘要/Abstract

摘要：

WC9铸钢件普遍应用于火电厂的相关部件，国内外标准都未对其硬度、金相组织做相关要求，仅依靠现场的检测手段对在役机组的铸钢阀体做质量评估有一定的难度。通过具体的案例分析，详细阐述了如何运用现场检测手段实现对某电厂运行近3万h的安全阀质量评估和性能分析，并最终得出有效结论，对该电厂后期运行的安全可靠性具有较高指导意义。同时，还提出火电厂和供货厂家在技术协议内容上可对硬度与金相组织的要求做出协商规定，作为标准的延续或补充，为机组运行期间的检测提供原始可查的依据。

关键词:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">火电厂, WC9铸钢, 安全阀, 现场检测, 质量评估, 金相组织

Abstract:

WC9 cast steel is commonly used in components of thermal power plants. Domestic and international standards do not have relevant requirements for their hardness and metallographic structure. It is difficult to evaluate quality of cast steel valves for inservice units only by onsite inspection. Through the specific case study, it expounded how to make quality evaluation and performance analysis for safety valves running for nearly 30,000 hours of inservice units in thermal power plants. Effective method was finally proposed and was of great significance for the safe and reliable operation of the power plant in the future. At the same time, it is also suggested that power plants and suppliers should make requirements on hardness and metallographic organization as a supplement to the standard through consultation, which can provide references for the later inspection during the operation.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">thermal power plant, WC9 cast steel, safety valve, onfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">site inspection, quality evaluation, metallographic structure

李戈，朱海宝，乔立捷，陈卓婷. 火电厂在役机组铸钢安全阀质量评估与性能分析[J]. 华电技术, 2019, 41(9): 72-75.

LI Ge，ZHU Haibao，QIAO Lijie，CHEN Zhuoting.

Quality evaluation and performance analysis of WC9 cast steel safety valve for inservice units in a thermal power plant [J]. Huadian Technology, 2019, 41(9): 72-75.

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