The temperature compensation coefficient for hydrostatic testing [σ]/[σ]t shall be taken as the minimum value among either the main pressure-bearing components or all pressure-bearing components
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This post was last edited by zhangjuhua on 2018-8-29 at 15:57. As shown in the figure, in GB150, when the materials of the main pressure-bearing components (cylinders, nozzles, heads, equipment flanges, and manway flanges) are different, the temperature compensation coefficient for the hydraulic test is taken as the minimum value of /t for the materials of each component. My question is: what if the main pressure-bearing components are the same, for example, the cylinder body, head, and flange openings are all made of sheet metal, but there are non-main pressure-bearing components, such as those on the cylinder body with DN
I think it should be calculated according to the standards. :Victory: Although the hydrostatic test pressure values listed in the calculations are the same, it seems that the results for each individual module indicate hydrostatic test pressures corresponding to the properties of their respective materials. Speaking of which, where in the 150 specification is it mentioned what the main stressed components are? I’ve only seen it in the tolerance specifications
During the design process, we perform calculations based on the main stressed components; when preparing the final strength calculation report, we first calculate the hydrostatic test pressure. Then, when generating the calculation report using SW6, manually enter the hydrostatic test pressure. SW6 cannot distinguish the primarily compressed components. The design should be carried out in accordance with standards; the SW6 software is only a supplementary tool, and it is recommended that designers possess their own judgment.
The 1998 version refers to the various components of the container, while the current version refers to its main pressure-bearing components.
The original poster should note one issue: in GB150, “main pressure-bearing components” is not a term with a specific meaning. Taking containers designed for internal pressure as an example, it should be understood to refer to all components that are subjected to internal pressure. Only in the TSG21-2016 \"Code for Fixed Pressure Vessels\" is \"main pressure-bearing component\" a term with a specific meaning.