New Seismic Design Criteria of Piping Systems in High-Pressure Gas Facilities

Inaba, Makoto; Ikeda, Masatoshi; Sato, Nobuyuki

doi:10.1115/1.1638789

Cited by 3 publications

(3 citation statements)

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“…Design criteria for piping components in Level 2 earthquakes, such as bolted flanged joints, expansion joints, and nozzles of equipment, are proposed (Ando 2002). These design criteria are provided by taking into account their failure modes classified according to the data of past damage due to earthquakes (Inaba 2004).…”

Section: Develpment Of Design Methods For Piping Systems For L2-rspmentioning

confidence: 99%

Development of Seismic Design Code for High Pressure Gas Facilities in Japan

Shibata

Suzuki

Ikeda

2004

Journal of Pressure Vessel Technology

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The Seismic Design Code for High Pressure Gas Facilities was established in 1982 in advance of those in other industrial fields, the only exception being that for nuclear power plants. In 1995, Hyogoken Nanbu earthquake caused approximately 6000 deaths and more than $1 billion (US) loss of property in the Kobe area, Japan. This unexpected disaster underlined the idea that industrial facilities should pay special consideration to damages including ground failure due to the liquefaction. Strong ground motions caused serious damage to urban structures in the area. Thus, the Seismic Design Code of the High Pressure Gas Facilities were improved to include two-step design assessments, that is, for Level 1 earthquakes (operating basis earthquake: a probable strong earthquake during the service life of the facilities), and Level 2 earthquakes (safety shutdown earthquake: a possible strongest earthquake with extremely low probability of occurrence). For Level 2 earthquakes, ground failure by possible liquefaction will be taken into account. For a Level 1 earthquake, the required seismic performance is that the system must remain safe without critical damage after the earthquake, including no gas leakage. For a Level 2 earthquake, the required seismic performance is that the system must remain safe without gas leakage. This means a certain non-elastic deformation without gas leakage may be allowed. The High Pressure Gas Safety Institute of Japan set up the Seismic Safety Promotion Committee to modify their code, in advance of other industries, and has continued to investigate more effective seismic design practices for more than 5 years. The final version of the guidelines has established design practices for the both Level 1 and Level 2 earthquakes. In this paper, the activities of the committee, their new design concepts and scope of applications are explained.

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Section: Develpment Of Design Methods For Piping Systems For L2-rspmentioning

confidence: 99%

Development of Seismic Design Code for High Pressure Gas Facilities in Japan

Shibata

Suzuki

Ikeda

2004

Journal of Pressure Vessel Technology

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“…L2-RSP for HPG piping systems shall allow nonlinear deformation (Inaba 2004). The design of HPG piping systems for the evaluation of L2-RSP requires nonlinear analysis, instead of the elastic analysis for L1-RSP.…”

Section: Develpment Of Design Methods For Piping Systems For L2-rspmentioning

confidence: 99%

“…These design criteria are provided by taking into account their failure modes classified according to the data of past damage due to earthquakes (Inaba 2004).…”

Section: Develpment Of Design Methods For Piping Systems For L2-rspmentioning

confidence: 99%

Development of Seismic Design Code for High Pressure Gas Facilities

Ikeda

2004

Journal of JAEE

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Seismic design of high-pressure gas facilities had been carried out in accordance with MITI notification 515 "Seismic Design Code" established in 1981. The Great Hyogoken-nanbu Earthquake occurred in 1995. Some facilities and piping systems were damaged due to ground displacement (settlement and/or lateral movement) induced by liquefaction. Having learned from the experiences, the seismic design code was amended in 1997. This paper introduces requirements in the new seismic design code and the evaluation method of Required Seismic Performance proposed.

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