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During the PID process design, the calculated inner diameter of the pipe is only 6 mm; what diameter should be chosen?

2018-10-24View Original

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During the PID process design, the calculated inner diameter of the pipe is only 6 mm. How should the pipe diameter be chosen? The medium is nitrogen, and the flow rate is constant; can it be directly set to DN15? Industrial design
Reply #22018-10-24
I don’t know. Maybe add a valve in the middle and keep it half-open?
Reply #32018-10-24
Mainly, the pipes for other processes are all at least DN15 in diameter; it’s not possible to suddenly design ones with a diameter of 1/8
Reply #42018-10-24
The nitrogen pipeline has an internal diameter of only 6 mm. Based on what flow rate did you use for the calculations? Why is it so small? Is the gas consumption very low? I think it can definitely be converted to DN15, because there must be some kind of throttling device, whether it’s a valve or a flow meter.
Reply #52018-10-24
I understand what you mean; it doesn’t quite fit conventional design.
Reply #62018-10-24
For a certain section used for purging with nitrogen, the designed flow rate is 0.03 m/s; the pipe diameter is also small, so the calculated inner diameter is very small
Reply #72018-10-24
The main issue is that, with this diameter, it’s simply too thin: funk:
Reply #82018-10-24
For the DN15 pipe, up to the interface, can we use tubing for connection after the diameter change?
Reply #92018-10-24
That’s okay too. I think we still need to increase the pipe diameter, and add flow meters as well as valves for throttling
Reply #102018-10-24
Well, I’m just talking nonsense. Because we often encounter client-side applications that use tapered tubes, especially when connecting instruments.
Reply #112018-10-24
Thank you. Mainly, I don’t have any solid basis for this; I’m just mentioning it as it increases costs

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