The allowable stress for 2.25Cr 1Mo 0.25V steel per ASME Section VIII Div.2 2007 edition (hereinafter called New Div2) becomes higher than that per old Div.2. Therefore the thickness of flange can be thinner than that per old Div.2. The internal fluid leakage is main concern as well as stress level especially for large size flanges per New Div.2. In this paper the analysis method using axi-symmetric model are investigated and the numerical analyses using axi-symmetric models for two types of flange design are performed in order to compare the flange rotation, gasket contact stress and stress level of flange and bolts. The contact stress of New Div.2 flange was lower than that of Old Div.2 flange totally. However the maximum gasket contact stress of New Div.2 flange which occurred at outer edge of the gasket is almost same as that of Old Div.2. Therefore it is expected that the sealing performance of flange connections per both Old Div.2 and New Div.2 is almost same.
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ASME 2011 Pressure Vessels and Piping Conference
July 17–21, 2011
Baltimore, Maryland, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4452-6
PROCEEDINGS PAPER
Comparison on Mechanical Behavior of Bolted Flanges Per Old and New Section VIII Division 2
Susumu Terada,
Susumu Terada
Kobe Steel, Ltd., Takasago, Hyogo, Japan
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Tatsuo Nishihara,
Tatsuo Nishihara
Kobe Steel, Ltd., Takasago, Hyogo, Japan
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Tomohiro Suzuki
Tomohiro Suzuki
Kobe Steel, Ltd., Takasago, Hyogo, Japan
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Susumu Terada
Kobe Steel, Ltd., Takasago, Hyogo, Japan
Tatsuo Nishihara
Kobe Steel, Ltd., Takasago, Hyogo, Japan
Tomohiro Suzuki
Kobe Steel, Ltd., Takasago, Hyogo, Japan
Paper No:
PVP2011-57248, pp. 151-159; 9 pages
Published Online:
May 21, 2012
Citation
Terada, S, Nishihara, T, & Suzuki, T. "Comparison on Mechanical Behavior of Bolted Flanges Per Old and New Section VIII Division 2." Proceedings of the ASME 2011 Pressure Vessels and Piping Conference. Volume 2: Computer Technology and Bolted Joints. Baltimore, Maryland, USA. July 17–21, 2011. pp. 151-159. ASME. https://doi.org/10.1115/PVP2011-57248
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