Pipe diameter, outer diameter, flange diameter – the sizes among them
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I need to know the relationship between the pipe diameter, outer diameter, and flange diameter – what are their corresponding values? Thank you! !
This is likely a difference in concepts: the pressure ratings of the pipelines vary, as do the dimensions of the nominal diameter, flanges, etc.
No, for example, for a DN25 pipe with a pressure rating of 1MPA, what is the outer diameter of the pipe, and what is the diameter of the flange that matches it? ?
This post was last edited by FORREST_GUMP on 2015-11-7 at 14:50. The concept is not understood correctly. The pipes and flanges need to be compatible with each other, requiring the same nominal diameter DN; however, this only ensures that they can be connected together – whether they can be used in practice depends on the operating conditions ； The most crucial factors in operating conditions are the physical and chemical properties of the medium, as well as pressure and temperature; based on these, the wall thickness of the pipes and the pressure rating of the flanges are determined. Using actual industrial parameters is the best way to illustrate this; you can’t solve this problem just by providing pressure alone.
First, it is necessary to determine the pressure rating of the pipeline; only then can pipes, flanges, elbows, tees, and so on of the same pressure rating be selected to ensure a proper match.