Over deze norm
NEN-EN-ISO 4022 specifies a method for the determination of the fluid permeability of permeable sintered metal materials in which the porosity is deliberately continuous or interconnecting, testing being carried out under such conditions that the fluid permeability can be expressed in terms of viscous and inertia permeability coefficients. This document does not apply to very long hollow cylindrical test pieces of small diameter, in which the pressure drop of the fluid in passing along the bore of the cylinder might not be negligible compared with the pressure drop of the fluid passing through the wall thickness.
|Nederlandse titel||Poreuze gesinterde metalen - Bepaling van vloeistofdoorlatendheid|
|Engelse titel||Permeable sintered metal materials - Determination of fluid permeability|