Container parameters
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Operating temperature: 50 degrees. What is the design temperature range? Operating pressure: atmospheric pressure. What is the design pressure range?
Operating temperature: 50 degrees. The designed temperature range is 50 + 15 to 30 degrees； Operating pressure: Atmospheric pressure; design pressure is determined based on the most severe operating conditions
It’s fine to write the design pressure as atmospheric pressure, since it is originally a vessel at atmospheric pressure.
I have a question: if the operating temperature of the container is 50 degrees, is it acceptable to use 70 to 80 degrees as the design temperature? As for the jacket, its operating temperature is -10 degrees – what should be the design temperature in that case?
Please refer to HG/T20580-2011 \"Basic Provisions for the Design of Steel Chemical Containers\" on your own.
The operating temperature of the container is 50 degrees; a design temperature of 70 to 80 degrees is acceptable. The jacket operating temperature is -10 degrees; the design temperature is taken as the normal operating temperature of the medium minus 5 to 10, or as the lowest operating temperature.
Is it because the operating temperature of the container is 5 to 10 degrees lower?
It depends on the specific situation; if the specified operating temperature is the maximum operating temperature, then that temperature should be used as the design temperature. If not, adding 15 to 20 degrees will suffice. At normal pressure, it depends on the equipment and specific operating conditions; for media with extremely high properties, it is best to refer to GB150, as the standards for normal-pressure vessels are not applicable in such cases, and this way there is a standard to follow. If it’s a general case, then it’s sufficient to follow the standards for pressure vessels at normal pressure. In that case, specify a particular value for normal pressure, as normal pressure represents a range!
Equipment for normal temperature and pressure refers to equipment whose design pressure is less than 0.1 MPa and greater than -0.02 MPa; what range of design temperatures constitutes normal temperature?
What temperature range is considered normal temperature for design purposes?