In the definition of pressure pipelines, is 0.1 MPa the design pressure or the operating pressure?
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I would like to ask: in the definition of pressure pipelines, is 0.1 MPa the design pressure or the operating pressure? There is a pipeline that has relatively low pressure under normal operating conditions, but its design pressure is slightly higher than 0.1 MPa. Should it be classified as a pressure pipeline? (Avoiding the influence of factors such as pipe diameter and medium)
There is relevant information available on the Regulations on Safety Monitoring of Special Equipment! Pressure pipelines refer to tubular devices that use a certain pressure to transport gases or liquids. They are defined as those with a maximum operating pressure of 0.1 MPa (gauge pressure) or more, where the medium is a gas, liquefied gas, steam, or a liquid that is flammable, explosive, toxic, corrosive, and has a maximum operating temperature equal to or higher than its standard boiling point; furthermore, such pipelines have a nominal diameter of 50 mm or more. Except for pipes with a nominal diameter of less than 150 mm and a maximum operating pressure of less than 1.6 MPa (gauge pressure), as well as the pipes that form part of the equipment used for transporting non-toxic, non-flammable, and non-corrosive gases.
Pressure pipelines refer to tubular devices that use a certain pressure to transport gases or liquids. They are defined as pipelines with a maximum operating pressure of 0.1 MPa (gauge pressure) or more, carrying gases, liquefied gases, steam, or liquids 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 50 mm or more. Except for pipes with a nominal diameter of less than 150 mm and a maximum operating pressure of less than 1.6 MPa (gauge pressure), as well as the pipes that form part of the equipment used for transporting non-toxic, non-flammable, and non-corrosive gases. It is the maximum operating pressure, not the design pressure. The design pressure may be lower than the maximum operating pressure.
Pressure vessels are defined by their operating pressure! A pressure vessel is considered one only when the working pressure is 0.1 MPa or higher; it falls under the regulation of special equipment. You can determine the design pressure yourself, and it can be set at a higher value!
If the design pressure is slightly higher than 0.1 MPa, it must be installed, inspected, pressure-tested, and accepted in accordance with the regulations for pressure pipelines; if the operating pressure is below 0.1 MPa, registration is not required, but notification is still necessary!
For pressure pipelines, it’s not just the pressure that matters; the medium inside the pipeline and its diameter also play a role. Therefore, it’s impossible to determine anything without taking the diameter and the medium into account.
The 0.1 MPa mentioned in the definition of pressure pipelines refers to the maximum operating pressure.
For pressure pipelines, consider factors such as pressure, pipe diameter, and the medium