Which size flange should be chosen?
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Dear experts, I have a container with a design pressure of 0.75 MPa; the pipe flanges used are of the PN10 series. It is recommended to choose flanges of a higher grade for verification – is this necessary?
First-tier number selection? How to understand it?
Yes, leave some margin; standard practices always take into account unforeseen or unexpected loads. And if it’s carbon steel, it won’t cost much extra
Does the standard flange already have a certain amount of margin built in? Furthermore, what margin is generally reserved? If the design pressure is 0.6–0.7 MPa, can PN10 grade be selected?
Is a certain margin already provided for the standard flange?
Both safety and cost-effectiveness need to be taken into account.
Temperature also needs to be taken into account; consult the temperature and pressure gauge suitable for the corresponding material in Fran
Although the design pressure is 0.75 MPa, what is the design temperature? A temperature and pressure gauge corresponding to the flange material is required
This post was last edited by AtlantisH on 2019-3-12 08:44. Determine the maximum allowable operating pressure for the flange made of the corresponding material at the design temperature; as long as it meets this requirement, it’s acceptable. In terms of size, there seems to be no difference between PN10 and PN16. Additionally, for certain flammable, explosive, or toxic media, some standards require that the pressure rating be no lower than PN16, in addition to complying with other relevant regulations.
If PN16 flanges are used frequently in the factory, then PN16 flanges should be used; there’s no need to cause trouble by seeking alternative suppliers. It doesn’t cost much more, and the cost of transportation isn’t even enough to cover that difference...