[Help] Why is this pressure vessel classified as an external device?
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According to the definition in TSG21-2016, this pressure vessel should meet the criteria for a fixed-pressure vessel; then why is it classified as falling outside that category?
Check the process to see if it is a full-liquid operation What are the stressors?
The product of work pressure and your volume does not reach the level required for a pressure vessel
1. Is the diameter 150 mm or greater? 2. What is the standard boiling point of the mixed oil?
Diameter 219 mm; the main component of the mixed oil is paraffin oil
It may be because the operating temperature does not reach the boiling point of the medium, and the gas space is less than 0.03 m³； The fixed-volume specification specifies the operating pressure, volume size, boiling point; additionally, the gas phase space also needs to be considered
It must be fully filled, and the operating temperature must be below the standard boiling point of the medium. This situation doesn’t fall into that category.
Sure, the boiling point of a blended oil must be higher than that of 202
This is most likely because the operating temperature is below the boiling point of the mixed oil