The app is used in the industrial pipe construction. European Norm EN10220 Nominal diameter DN 25 - 1000 European standard EN 10220 / EN1092 Functions: - Measure of flange PN 6 - 40: - welding neck lenght, - gasket measure inside/outside, - hex bolts, number, nominal size, lenght(ISO), - bolt circle, - flange outside diameter, - flange thickness, - hex nuts thickness. - measurements of the elbow with 4 types or manual input: - elbow radius , - calculate the cutting mesurements of the elbow, - take off, chord, - tee with different outlet diameter, - reduction. -Extensive help and explanations