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Volume 37, Issue 1
Displaying 1-6 of 6 articles from this issue
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Takayasu TAHARA, Takahiro ARAKAWA, Masayosi KURIHARA1999 Volume 37 Issue 1 Pages 3-8
Published: January 25, 1999
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSThis paper summerizes and interprets remarkable requirements of EXAMINATION-(Part KE), TESTING (Part KT) and MARKING, STAMPING, REPORTS (Part KS) in ASME Code Sec. VIII Div. 3 compared with Div. 2 and also status of studies for the commnets, propopsed madofication and/or changes from JPVRC Special Working Group in ASME Code Committee as the final report in the series of “Study on New ASME Code, Sec, VIII Div. 3 for High Pressure Vessels”.View full abstractDownload PDF (910K) -
Akihiro TAKIGUCHI, Masanori OKI, Kiyoyuki OOKAWA, Tosikazu IRIE1999 Volume 37 Issue 1 Pages 9-18
Published: January 25, 1999
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSThe Production Department of Osaka Gas is addressing activities of enhancing reliability at lower cost by performing maintenance of equipment properly at proper time. Among the activities, equipment diagnosis technology is of great importance, which checks soundness of equipment and detects signs of deterioration of equipment.
We are systematizing such equipment diagnosis technology, and are going ahead with the construction of a new system for maintenance. This paper describes the online Inspection techniques for vessels and piping, which mainly use ultrasonic methods.View full abstractDownload PDF (3212K) -
Yasuo OTOGURO, Katsukuni HASHIMOTO, Shunji KUMAGAI, Kentaro ASAKURA1999 Volume 37 Issue 1 Pages 19-26
Published: January 25, 1999
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSAn intermetallic compound, Ni3Al shows an unusual property that strength increases with higher temperature in the range below 900°C.
Accordingly, it seems to be applicable to turbine blades for jet engines. However, it is well known that the hot workability is markedly inferior.
From these viewpoints, the effects of a small amount of B and Hf on hot workability, microstructures, and high temperature strengths were investigated.
The specimens used in this experiment contained about 11% Al and indicated duplex structures of γ and nearly 30% γ′. Therefore, they showed on reverse dependence on temperature with regard to high temperature strength.
Adequately added B and Hf to the specimens improved creep rupture strength at 750 and 800°C and hot workability.View full abstractDownload PDF (9713K) -
Masahito MOCHIZUKI, Makoto HAYASHI1999 Volume 37 Issue 1 Pages 27-37
Published: January 25, 1999
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSWe present a new and simplified method of estimating residual stress in welded structures using inherent strain. The method makes use of elastic analysis with the finite element method, and can be used to calculate the welding residual stress in three-dimensional structures. The method is used to efficiently compute the residual stress remaining in complex welded structures. The inherent strain distribution at a welded joint of a pipe penetrating the spherical head of a pressure vessel and a socket-welded pipe joint can be assumed to be present in a simple distribution, and the residual stress was calculated by elastic analysis. Inherent strain distributions were inferred from those of welded joints with simple shapes. The estimated residual stress distributions using these inferred inherent strains agree well with the results of measurements of a mock-up specimen. Welding residual stress in three-dimensional structures with complicated shape can be estimated by using the proposed method in this paper.View full abstractDownload PDF (1506K) -
Shinsuke TANAKA1999 Volume 37 Issue 1 Pages 38-42
Published: January 25, 1999
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSDownload PDF (2241K) -
Kohji HOSHINO1999 Volume 37 Issue 1 Pages 43-50
Published: January 25, 1999
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSThis Plant Inspection System lies at the cutting edge of facility maintenance.
The primary purpose of this inspection is to keep the plant in good working order, and to avoid the unscheduled shutdown of the plant by unexpected failure of plant components, such as TW, VE, RE, HE, and Pipes.
Both plant safety and effective production require a higher quality and larger volume of plant inspection activities.
As one of the most advanced systems currently available, Super Kensa-Man offers the latest solution to the needs of more elaborate maintenance activities for inspection work.
Super Kensa-Man supports the following management activities concerning plant inspection:
-Inspection data management
-Inspection planning
-Budgeting
-Inspection drawing management
-Diagnosis/predictive maintenance
Super Kensa-Man provides user-friendly system features:
-A graphical user interface especially designed for diagnostic activities
-An inspection drawing environment applicable for both vector and raster data format (thus enabling easy use of the existing inspection drawing)
-Flexibility and expandibility for reflecting the latest change in the execution procedures of inspection activities.View full abstractDownload PDF (1420K)
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