Do liquid ammonia spheres belong to category III pressure vessels?
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Do liquid ammonia spheres belong to category III pressure vessels? The design documents for all three types of pressure vessels should include a risk assessment report, right? Why don’t ours have one?
Spherical tanks generally fall into category III pressure vessels, and according to the relevant regulatory requirements, they need to undergo a safety assessment
It depends on the product of the design pressure and volume
It’s not known in which year the ball tank designed by the original poster was built; if it was before 2009, there might be no risk assessment report available.
Just because you don’t have it doesn’t mean it’s not there; you can ask the manufacturer for it.
The management in many factories really uses absurd logic; when checking for the usage registration certificate, they claim that someone else didn’t give it to them. There are no drawings available; they claim there are none until the product leaves the factory. There are no inspection reports either; they insist that there are none. Next time if you don’t get your salary, will the boss just say there’s none?
Under the scope of the NBT47041 standard, the volume of spherical tanks must be 50 cubic meters or more. Liquid ammonia is classified as a Category 1 medium; its saturated vapor pressure at 50 degrees Celsius is 2.1 MPa. Please determine what category it falls into. If the volume is less than 24 cubic liters, it falls outside the scope of regulation 47401; please check again to determine which category it belongs to