Flange German standard DIN, pleaseND16 what does that ND mean?It's ND in German standard DIN, not nominal diameter DN
Agree upstairsThe pipe has inner diameter, outer diameter and wall thicknessOutside diameter - wall thickness = bore
ND refers to nominal diameter, approximate pipe internal reference dimension.Nominal diameter is not equal to outer diameter -2 times double thickness
Should mark "DN", is the nominal diameter of the code.Is the nominal diameter size after the roundness of the numerical repair to the mantissa, in order to simplify the mark.Germany, China ISO, nominal diameter are DN.
