Pressure vessel code issue
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The common codes are S, R, C, and E; some D, V, EH, and SR codes are also seen. What do they represent respectively?
Storage, reaction, tower, heat exchange – these are generally the first letters of the corresponding English words.
It is determined by the design unit itself; generally, the first letter of the English word is used
The first four standards specify that EH now knows it is an electric heater; what do D, V, and SR represent?
D and V codes are quite common; they probably weren’t determined by the design team
V should be vessel, SR seems to mean spheric, and D also refers to a tank, drum