Session: DA-08-01: Fitness for Service Evaluations - 1

Paper Number: 85187

85187 - Reorganize Significance of Mt, Ms and Plastic Zone Size Against LMSD Under Plastic Collapse Regime of Api 579-1/asme Ffs-1 Ffs on Japanese Seismic Regulation 

Japanese industries has been longed for formal permission to use API 579-1/ASME FFS-1 Part 4 and Part 5 assessment on the equipments subjected to High Pressure Gas Safety Law, that covers majority of refining and chemical plants, for over decades, as the most equipments has been operated alomost 50 years plus some equipments exposed to corrosion under insulation. Because of the conservatism on safety in the culture, it was tough to be understood the reliability and safety of API 579-1/ASME FFS-1 Fitness-For-Service Part 4 and Part 5. However, due to the effort of cross industry task team, the reliability and safety of API 579-1/ASME FFS-1 Part 4 and Part 5 assessment was well understood by Japanese the government. Now, Japanese Government has permitted API 579-1/ASME FFS-1 Part 4 and Part 5 assessment for equipments subjected to High Pressure Gas Safety Law, from April 2021. As we discussed with the government, the last barrier to use API579-1/ASME FFS-1 Part 4 and Part 5 was the sesimic desgin requirement. To pass through the requirement, several burst test data was reviewed and assessed from the view point of the Japanese Seismic requirements. Data obtained from papers was compared with the compression side case stress requirements and tension side case requirements as well. Also, FEM was conducted to compensate the burst and moment test data. In this paper, API 579-1/ASME FFS-1 Part 4 and Part 5 axial stress requirement and Japanese Seismic Design requirement will be compared and explaiend. Also, an over view of the additional requirement, that included a future blue prints, to use API579-1/ASME FFS-1 in Japanese Industry will be introduced.

Presenting Author: Yoichi Ishizaki Idemitsu Kosan Co.Ltd.

Presenting Author Biography: Yoichi Ishizaki is a chief associate of Idemitsu Kosan Co.Ltd, Tokyo, Japan.<br/>He has been working for oil industry since 1992. After working for an American pastorium company, he is now serving to Idemitsu Kosan Co.Lt’d, Japan, since 2014. During his carrier, he has been contributing to FCCU hardware design improvements, refractory lined component design improvements, piping and pressure vessel design and trouble shootings that includes fitness-for-service assessment of damaged components especially for creep damage. He earned Master of Science in Material Engineering, NAGOYA UNIVERSITY, NAGOYA, JAPAN, 1992, after the graduation of Nagoya University in 1990. He is a licensed P.E., TX, USA, and has been member of API/ASME joint committee on fitness for service since 2019.

Authors:

Yoichi Ishizaki Idemitsu Kosan Co.Ltd.
Futoshi Yonekawa Idemitsu Kosan Co.Ltd.,