Flanges come in PN series and CLASS series – what is the difference? How to convert
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The result of the lookup is that 1 pound equals 0.4537 kilograms. According to the standards, 150 pounds corresponds to a pressure of 20 kilograms. How is the relationship Class150=PN2.0 calculated?
class150=pn20 class300=pn50 class600=pn110 class900=pn150 class1500=pn260 class2500=pn420
The correspondence between European and American standards cannot be achieved through simple unit conversions, as they are based on different temperature conditions.
150LB indicates a maximum operating pressure of 285 PSI at room temperature; PSI * 6.9/100 = pressure in kilograms.
The rated pressure classes of flanges with different standards cannot be simply converted, as the pressure classes of these flanges are not divided using the same pressure intervals. This is a common-sense question, not a technical one. It’s the same principle as why an integer inch diameter cannot be directly converted into an integer metric diameter. It can be in a roughly similar range, but there won’t be a precisely accurate correspondence.
PN European system, class American system
This is a standard; just follow the norms, there is no conversion needed
This must be carried out in accordance with the standards; it cannot be simply converted!
I’ve learned something new – so that’s how it works. I thought it involved unit conversions