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Takeover selection problem

2020-05-07View Original

Thread Content

I have a question regarding the selection of the pipe fitting. The nominal diameter specified for the pipe fitting is DN190, but the standards available are only for DN150 and DN200. How should I make the choice? Can I choose a larger one?
Reply #22020-05-08
Too little information is provided to conduct an analysis.
Reply #32020-05-08
Generally, the pipe diameter is determined based on the velocity of the liquid inside it. Different fluids and different industries require different flow velocities; these velocities fall within certain ranges. After calculating the pipe diameter for both the maximum and minimum flow velocities under various operating conditions, a standard pipe diameter is selected from within that range. In the diagram, the DN190 value appears to be incorrect; for this type of pipe fitting, it’s better to consider the size of the user’s piping system. In addition, tees should be used at appropriate points, and it’s best to communicate with the user to confirm these details.
Reply #42020-05-08
This is marked incorrectly; please confirm whether it’s 90 or 100, as 190 isn’t an option
Reply #52020-05-08
This is my graduation project; it’s really difficult and gives me a headache\ud83d\ude29
Reply #62020-05-14
It might refer to the inner diameter, or there could be a labeling error; DN190 is not standard

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