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Open Inspection Intervals of Boilers and Pressure Vessels for Chemical Plants in Japan

[+] Author Affiliations
Kotoji Ando

Yokohama National University, Yokohama, Japan

Kazuharu Kitano

Japan Boiler Association, Tokyo, Japan

Paper No. PVP2006-ICPVT-11-93712, pp. 429-433; 5 pages
doi:10.1115/PVP2006-ICPVT-11-93712
From:
  • ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
  • Volume 1: Codes and Standards
  • Vancouver, BC, Canada, July 23–27, 2006
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4752-7 | eISBN: 0-7918-3782-3
  • Copyright © 2006 by ASME

abstract

The open inspection intervals of boilers & pressure vessels for chemical plants in Japan is decided by the director of a bureau’s notification of Ministry of Public Welfare & Labor of Japan. The intervals are divided into three categories: 1) 12-month, 2) 24-month and 3) 48-month intervals. Basically, all boilers & pressure vessels for chemical plants shall be subjected to open inspection by every 12-month interval. However, specially authorized boilers & pressure vessels for chemical plants can be extended the open inspection interval from 12-month to 24-month or 48-month interval. The unit for authorization is a site of works. The numbers of accepted sites of works, boilers & pressure vessels for 24-month interval and 48-month interval at the time of 25th /Nov/2005 are as follow: *24-month open inspection interval — Sites of works: 177, Boilers: 1331, Pressure vessels: 10536; *48-month open inspection interval — Sites of works: 57, Boilers: 597, Pressure vessels: 4452. In this paper, the authorization system and the conditions are introduced concretely.

Copyright © 2006 by ASME

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