Changes in the allowable stress ratio in the formula for calculating the voltage withstanding test pressure under the new standards
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In GB150 version 98, the allowable stress ratio is taken as the minimum value among the ratios of various components, whereas in GB150 version 2011, the allowable stress ratio is taken as the minimum value among the ratios of the main compressive components. According to the 2011 version, when calculating the pressure for the withstand test, it is sufficient to consider the allowable stress ratio for the main pressure-bearing components as specified in the Code for Fixed Pressure Vessels; there is no need to take into account fittings, flanges with a diameter of DN250 or less, or studs with a size of M36 or less. What is the rationale behind this change in the standards?
The 2011 version excludes the allowable stress ratio for bolts compared to the 98 version. Their starting point is that Ding Bomin explains it very clearly in \"Analysis of ASME VIII Pressure Vessel Code\", page 65; an electronic version is also available online
The allowable stress ratio for studs has not been excluded!
This post was last edited by fzujunru on 2018-2-9 11:04. Well, I was wrong