Flange selection
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I would like to ask everyone: what standard applies to the flange and flange cover mentioned above? Is it the standard for pipe flanges or that for equipment flanges? The basic parameters are: design pressure of 0.7 MPA, and design temperature of 120 degrees. If pipe flanges are to be used, it is necessary to know what PN rating the flanges should have. My current choice is a pipe flange PN16 with butt weld flange – is that acceptable?
It should be designed as a pipe flange; your choice is acceptable.
What is the basis for making the selection? Pipe flanges have specified temperature and pressure ratings – where can this be found in the pipe flange standards?
HG/T20592-20635-2009 Steel pipe flanges,
I know, on which page of the standard
First, look at P19 to see what material has been chosen, then look at P27.
It seems that a plain weld flange will do
For this selection, you just need to choose according to the flange standards; it is the flange cover above that requires calculation
The allowable stress of a flange is determined based on the type of material and temperature; since the flange cover has openings, simple verification can be carried out using software such as SW6.