[Standardized posting guide] Discussion of temperature issues---Keywords---Definition of normal temperature---Heat exchanger temperature----Please see the content
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This post was last edited by kareale88 on 2018-12-7 09:30 bk09.jpg Discussion of temperature issues---Keywords---Definition of normal temperature---Heat exchanger temperature----Please see content 1. How to divide the concept of normal temperature. By extension, the working temperature of pressure vessels can be divided into several types. How to define each limit? Let’s discuss it. ； Refer to Figure 1 (not sure whether it is reasonable or not). 2. Please refer to the introduction in "Basics of Design of Steel Chemical Vessels 20580-2011" ； Refer to Figure 2 Figure 3. 3. How do you define the temperature appearing on the heat exchanger (general definition and process definition? ), how did you get it? ； Refer to Figure 4. I hope everyone will actively participate, the moderator will not be stingy.
a. When the design temperature is lower than -20℃, it is low temperature, which can be determined in Appendix E of GB150.3. b. When normal temperature appears in the design condition diagram, everyone easily understands it as the ambient temperature. c. The temperature defined by each industry should be different, and no unified statement and source have been found.
Talk about the selection of pressure vessel design temperature
There is no mention of operating temperature in GB150； I saw that the second picture you uploaded mentioned "normal operating temperature of the medium" and I feel that the following sentence is correct. The operating temperature of the pressure vessel refers to the (medium) temperature, while the design temperature refers to the (metal) temperature of the shell. I hope the discussion is meaningful
Containers are divided into four types according to wall temperature: normal temperature, medium temperature, high temperature, and low temperature. Normal temperature is -20~200 degrees ； The high temperature is generally higher than 420 degrees ； Medium temperature is a container between normal temperature and high temperature ； Low temperature is a container below -20 degrees. Online information.
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Thank you God, learn from* . If you learn a little bit every day, you can reach a higher level in a year.
Calculation and determination of heat exchange tube wall temperature for shell and tube heat exchangers https://bbs.hcbbs.com/thread-2165034-1-1.html (Source: Haichuan Chemical Forum Network) This post is good and helpful to the third item. I would like to share it with everyone.
-Those below 20℃ are called low-temperature containers, which are for carbon steel and low alloy steel containers. For austenitic stainless steel, a low-temperature vessel can only be considered a low-temperature vessel if the design temperature is lower than -196°C. For details, see GB150.3-2011 Appendix E, Section E.1.1