Fastening structure for use at low temperature

Fastening structure for use at low temperature

A first flange and a second flange are superposed and fastened with a bolt and a nut in a fastening operation, to implement a fastening structure used at temperature lower than atmospheric temperature for the fastening operation. Assuming that the first flange has a thickness L and a coefficient of...

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Hauptverfasser: Ashibe, Yuuichi, Masuda, Takato, Takahashi, Yoshihisa, Honjo, Shoichi, Shimodate, Masato, Etoh, Keisuke
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creator Ashibe, Yuuichi
Masuda, Takato
Takahashi, Yoshihisa
Honjo, Shoichi
Shimodate, Masato
Etoh, Keisuke
description A first flange and a second flange are superposed and fastened with a bolt and a nut in a fastening operation, to implement a fastening structure used at temperature lower than atmospheric temperature for the fastening operation. Assuming that the first flange has a thickness L and a coefficient of linear expansion α, the second flange has a thickness L and a coefficient of linear expansion α, superposed first flange and second flange have a thickness L, and the bolt has a coefficient of linear expansion α, a relation of L·α≧L+L is satisfied, i.e. heat shrinkage of the bolt is not smaller than the total heat shrinkage of the first and second flanges. Thus, impairment of sealing property due to heat shrinkage is avoided at a flange junction used at low temperature.
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title Fastening structure for use at low temperature
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