Is an ammonia pipeline a pressure pipeline?
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I would like to ask everyone: After nitrogen is introduced into the ammonia storage tank, the normal nitrogen sealing pressure is 5 kPa. (The ammonia storage tank is designed to withstand a pressure of only 0.5 MPa, and its safety valve is set at 7 kPa.) Does the ammonia pipeline constitute a pressure pipeline? I think for pressure pipelines, the maximum operating pressure should be greater than or equal to 0.1 MPa (gauge pressure); so it shouldn’t fall under this category, right? Tubular devices for liquids, defined as pipes with a maximum operating pressure of 0.1 MPa (gauge pressure) or more for gaseous, liquefied gas, or steam media, or for liquid media that are flammable, explosive, toxic, corrosive, and have a maximum operating temperature equal to or higher than their standard boiling point, and with a nominal diameter of more than 25 mm. Tubular devices for liquids, defined as pipes with a maximum operating pressure of 0.1 MPa (gauge pressure) or more for gaseous, liquefied gas, or steam media, or for liquid media that are flammable, explosive, toxic, corrosive, and have a maximum operating temperature equal to or higher than their standard boiling point, and with a nominal diameter of more than 25 mm.
According to relevant standards, it should not be classified as such
Values not exceeding 0.1 mPa (gauge pressure) or pipe diameters smaller than 57 are not considered
It would be more appropriate to ask in a different section! ! !
Pipes with a diameter of less than 50 do not fall under the category of pressure pipes
It depends on the pressure used to transport the ammonia solution; it should be fine if it relies on gravity flow, but if a pump is used, then calculations are necessary.
The pressure conditions are not met; it does not qualify as a pressure pipeline
The pressure does not exceed 0.1 MPa, so it does not fall under the category of pressure pipelines
According to the definition of pressure pipelines, it does not fall under this category