Pipe pressure issues
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Ask for help: CS pipes with diameters of 20, 32, 40, 50 and 65 have a pressure of 4MPa and the medium is compressed air. What is the wall thickness of the pipe? In addition, the pressure of CS pipes is greater than 4MPa. What is the appropriate pressure level? Personally, I feel that PN5.0 is not suitable and PN10.0 is too big. An air compressor provides the pressure. Is the compressed air temperature normal? I am a newbie, please ask an expert for advice, thank you.
The pressure of CS pipes is greater than 4MPa, and the pressure level is recommended to be PN6.5. You can check the "Chemical Process Design Manual".
PN6.4 is fine. It is very common. It is introduced in many design manuals. You can also find introductions in relevant magazines.
The wall thickness is normal: DN20×2.5, DN32×3, DN40×3, DN50×3.5, DN65×4
CS pipes with diameters of 20, 32, 40, 50, and 65 have a pressure of 4MPa, the medium is compressed air, and the wall thickness of the pipe: DN20 (φ25×3), DN32 (φ38×3.5), DN40 (φ45×3.5), DN50 (φ57×3.5), DN65 (φ76×4). The pressure of CS pipe is greater than 4MPa, and the pressure level is 6.3MPa.
Thank you! :handshake
What is the working temperature? This has a lot to do with the calculation of the wall thickness of the pipe.
Good question, and thanks for the answer!
Just choose PN6.3. Please refer to the design manual for wall thickness. The air temperature coming out of the compressor is generally around 80 degrees.
Ask for help: CS pipes with diameters of 20, 32, 40, 50 and 65 have a pressure of 4MPa and the medium is compressed air. What is the wall thickness of the pipe? In addition, the pressure of CS pipes is greater than 4MPa. What is the appropriate pressure level? Personally, I feel that PN5.0 is not suitable and PN10.0 is too big. An air compressor provides the pressure. Is the compressed air temperature normal? First of all, we need to find out what is the operating pressure of compressed air? When the compressed air operating pressure is 4MPa, the pipeline grade should be 6.4MPa. "Chemical Process Design Manual" Vol. 1 P290 Table 4-2 For a carbon steel pipe with a diameter of 20, when the pipe is 6.4MPa, the pipe wall thickness is 3mm. ； For carbon steel pipes with diameters of 32 and 40, the wall thickness of the pipe is 3.5mm when the pipe diameter is 6.4MPa. ； For a carbon steel pipe with a diameter of 50, the wall thickness of the pipe is 4mm when the pipe is 6.4MPa. ； For a carbon steel pipe with a diameter of 65, the wall thickness of the pipe is 4.5mm when the pipe is 6.4MPa. ； For the calculation method, please refer to "Calculation of Pipe Wall Thickness for Medium and Low Pressure Pipelines" in Volume 1 of "Chemical Pipeline Design Manual"”