Issues with pressure vessel calculation sheets
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This post was last edited by fy214152 on 2018-9-20 at 12:55. Are separate design calculations required for the lowest and highest design temperatures in the calculation of pressure vessels? The jacket is designed for a pressure of 0.6 MPa, with a minimum design temperature of -15 degrees Celsius and a maximum design temperature of 185 degrees Celsius; it is made of 10 mm thick Q345R steel plates, and the medium used is brine/steam. The inner part is designed for a pressure of 0.9 MPa and a temperature of 160 degrees Celsius; it is constructed from 16 mm thick S31603 stainless steel plates, with ethanol as the medium.
It is sufficient to prepare a calculation sheet based on the highest design temperature, but the technical requirements for the main material must be determined according to the lowest operating temperature.
-At 15 degrees, the allowable stress of the material is taken as the value corresponding to 20 degrees; this value must be greater than 185 degrees. Therefore, providing a value for -15 degrees in the calculation sheet isn’t very meaningful. It is sufficient to specify requirements such as impact testing for the material in the drawings or technical specifications.
It makes sense; a lot of knowledge related to containers needs to be considered in relation to other aspects. Sometimes it’s necessary to view things from two different perspectives, leveraging strengths to compensate for weaknesses and using clever strategies to address shortcomings. If you reduce something, another thing needs to be added to make up for it.