The pressure level classification of pipe fittings is mainly based on the design pressure and purpose, and can be divided into the following levels:
PN level: This is the pressure level when the pipe fitting is connected to the flange, which is often used in flange-connected pipeline systems.
Low-pressure pipeline: The design pressure does not exceed 2.5MPa23.
Medium-pressure pipeline: The design pressure is between 4-6.4MPa23.
High-pressure pipeline: The design pressure is between 10-100MPa23.
Ultra-high-pressure pipeline: The design pressure exceeds 100MPa23.
Applicable scenarios and standards for different pressure levels
Low-pressure pipeline: Applicable to the transportation of water, gas, etc. in general industry and civil buildings.
Medium-pressure pipeline: Applicable to the transportation of industrial media that require higher pressure, such as compressed air, water, etc.
High-pressure pipeline: Applicable to the transportation of high-pressure media such as oil and natural gas.
Ultra-high-pressure pipeline: Applicable to special industrial occasions, such as nuclear energy, high-pressure gas storage and transportation, etc.
Specific parameters and model examples
PN16: Applicable to pipes from DN10 to DN2000, with a wall thickness range of SCH5S to SCH160. Common types include elbows, tees, crosses, flanges, flanging, welding, etc.
PN25: Applicable to pipes from DN10 to DN1200, with a wall thickness range of SCH5S to SCH160.
PN40: Applicable to pipes from DN10 to DN600, with a wall thickness range of SCH5S to SCH80.
