ASME help! In PVElite, do the design pressure parameters refer to gauge pressure or absolute pressure? How should the external temperature be selected?
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This post was last edited by WallaceLee on 2020-9-3 at 10:25. As shown in the figure, to design an ASME-standard container, within the design constraints in PVELite, there are parameters for design internal press and design external press； There is a design internal temperature and a design external temperature. The design temperature range for the containers provided by the owner is: the maximum MAX is -172°C, and the minimum MIN is 66°C. My question now is: For design internal press, the internal pressure referred to is gauge pressure or absolute pressure? And the same goes for design external press – is the external pressure gauge pressure or absolute pressure? If this device is placed outdoors, how should the external pressure be determined for design external press? 2. If the container is placed outdoors, how should the design external temperature be determined? Is it 0°C or the ambient temperature? 3. Design internal temperature: Should -172°C or 66°C be entered? I hope the experts can give some advice! ! !
The value entered in PV is gauge pressure. Design conditions such as internal pressure, external pressure, and design temperature are determined based on process requirements. Whether the equipment is installed outdoors has no impact on the design external pressure; only the effect of ambient temperature on the materials needs to be taken into consideration
Thank you very much for your reply. Then, how do you think the design pressure in PV should be entered? Is it -172 or 66?
Your device needs to be designed as a cryogenic container, with a design temperature of -180℃
The value entered in PV is gauge pressure. Design conditions such as internal pressure, external pressure, and design temperature are determined based on process requirements. Whether the equipment is installed outdoors has no impact on the design external pressure; only the effect of ambient temperature on the materials needs to be taken into consideration