The same flange has different pressure ratings
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For flanges of the same diameter, if the pressure ratings are different, does a higher pressure level mean that there are more bolt holes for securing the flanges with bolts? Thank you, points appreciated
Yes. Not only is the number of bolts large, but the flanges are also thicker. You can look up the HG/T 20592 series of standards and compare them to find out
As I recall, it’s the case for DN40 and above
Not only has the quantity increased, but the bolt diameter has also grown larger. . .
Not necessarily; it depends on the standard HG/T20592
Yes, it’s also possible that the number of bolts remains unchanged, while the flange becomes thicker and the bolts become larger in diameter