Is anybody aware of DIN Flange drilling Template Spec for PN20 and PN50 Flanges? DIN 1092-1 includes all but PN20 and PN50. I'm Designing Valves to meet ASME Class 150, 300 and 600 and they must also meet equivalent PN20, PN50 and PN100. PN100 dimensions in DIN 1092-1 are not the same as ASME Class 600, which leads me to believe PN20 and PN50 are not as well. Exhaustive web search has left me empty, with only indications that PN20=Class150; PN50=Class300 and PN100=Class600. From results of Dimensional data from EN1092-1 for PN100, only Pressure conversion is equal (ie. PN50 bar= 725 psi, approx. equal to CWP of Class300...etc).
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