STUDY ON LTA MEASUREMENT FOR FFS ASSESSMENT

机译：用于FFS评估的LTA测量研究

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FFS assessment technologies for pressure equipment have been studied and standardized in recent 15 years in Japan. FFS assessment of local thin area, LTA, is the most frequently used in process industries. However reliability of thickness measurement of LTA and influence to FFS assessment has not been studied much in the past. Uncertainty of thickness measurements and Remaining Strength Factor, RSF, were investigated on Round Robin Testing using manual UT and additional new technology such as flexi-alley UT and 3D LED system for LTA in pipes, It is recommended to use suitable combination of Manual or mechanized UT and 3D LTA measurement system in case of assessment of critical flaws and decision making for repair and replacement of pressure equipment.

机译：最近15年，日本对压力设备的FFS评估技术进行了研究和标准化。 FFS评估本地薄区域LTA是过程工业中最常用的方法。但是，过去对LTA厚度测量的可靠性以及对FFS评估的影响尚未进行深入研究。在使用手动UT和其他新技术（例如用于管道LTA的flexi-alley UT和3D LED系统）的循环测试中研究了厚度测量的不确定性和剩余强度因子RSF，建议使用适当的手动或机械组合UT和3D LTA测量系统，用于评估关键缺陷并决策维修和更换压力设备。

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《ASME Pressure Vessels and Piping conference》|2015年|V01AT01A002.1-V01AT01A002.8|共8页
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Takayasu TAHARA; Takuyo KAIDA; Minoru NIIMURA; Shinsuke SAKAI;
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1. An Overview and Validation of the Fitness-For-Service Assessment Procedures for Local Thin Areas: LTA ASSESSMENT PROCEDURES FOR LONGITUDINAL STRESS [J] . J. L. Jannelle, D. A. Osage, S. J. Burkhart Welding Research Council Bulletin . 2005,第505期

机译：局部薄弱地区适应性服务评估程序的概述和验证：纵向应力的LTA评估程序
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3. An Overview and Validation of the Fitness-For-Service Assessment Procedures for Local Thin Areas: VALIDATION OF LTA ASSESSMENT PROCEDURES FOR CIRCUMFERENTIAL STRESS [J] . J. L. Jannelle, D. A. Osage, S. J. Burkhart Welding Research Council Bulletin . 2005,第505期

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STUDY ON LTA MEASUREMENT FOR FFS ASSESSMENT

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