Storage tank vent valve
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The tank contains aromatic hydrocarbons, a toxic liquid medium; so doesn’t this breathing valve allow air to be drawn in directly? Doesn’t this type of storage tank require nitrogen protection? Could the presence of air inside the tank lead to the formation of hazardous substances? It’s so hard to understand
Look carefully; there should be a nitrogen sealing pipeline to maintain a slight positive pressure inside the tank~~
Many jars made in the past did not require nitrogen filling; instead, air was used. Now that environmental regulations are stricter, everyone has switched to using nitrogen.
Fixed roof or internal floating roof? An internal floating roof is better; it’s not as problematic. In the past, the requirements weren’t so strict, but these days more care is taken in construction
That was done back in the day; now an internal floating roof plus nitrogen sealing is required. . . . . . . . .
Now, internal floating roofs are equipped with nitrogen seals; the exhaust gases must be absorbed and cannot be released directly into the atmosphere. Standards are getting higher, and environmental protection is making progress! It will get better and better
Exhaling is beyond doubt; if air is inhaled, oxygen will also enter the body. I prefer to only exhale, and inhale nitrogen when the pressure is low. I think even with nitrogen sealing, it’s not good to inhale oxygen; could the hydrocarbons get oxidized?
It wouldn’t be a problem using the old version; everything has been improved now
These problems existed even before the use of the internal floating disk; it’s impossible to completely prevent air from entering. When using the internal floating disk, activities such as routine level checks, the disassembly and inspection of the breathing valve, or gas sampling all allow air to enter the tank. The impact is not severe, and you can conduct an explosive gas analysis on the gas inside the tank