Short-pressure pipelines: Report the issue
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I have a question: The medium inside the tank is a Class B fluid (60% acetonitrile), and the discharge method involves introducing compressed nitrogen at 1–2 bar into the tank to transport it to the intended location of use. The 2” pipeline at the bottom of the tank is approximately 1–2 meters long; it has pressure only during material transfer. Is it considered a pressure pipeline? Please let me know if installation is required
It is a pressure pipeline; construction drawings are required, and approval must be sought from the special inspection agency.
So if the pipeline is particularly short, less than 1 meter, does it still need to be treated as a pressure pipeline? Is there any guideline specifying the minimum length below which such treatment is not required?
Based on the medium, pipe diameter, and pressure, this pipeline should be classified as a pressure pipeline. What I want to know is whether it still needs to be treated as a pressure pipeline even if its length is very short. Are there any documents that support this view? No, it’s not necessary
For pressure pipelines listed in the catalog, it is the diameter, the medium, and the pressure that matter, rather than the length
The definition of a pressure pipeline is independent of its length; if the pipe diameter can be reduced, it may not be considered a pressure pipeline.
Pressure is only present during material transfer; is it a pressure pipeline? ? All pipes have no pressure when not in use; the declaration is based on the design pressure
The regulations for the inspection of pressure pipelines provide detailed and clear instructions; please review these standards carefully