ISO 4022:2018
Permeable sintered metal materials — Determination of fluid permeability
This document 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 (see Annex A).
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 (see A.5).
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Foreword
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
3.1 Terms and definitions
3.2 Symbols and units
4 Principle
5 Test piece
6 Apparatus
6.1 Equipment
6.2 Test fluids
7 Procedure
7.1 Measurement of thickness and area of the test piece
7.1.1 Flat test pieces
7.1.2 Hollow cylindrical test pieces
7.2 Measurement of pressure drop
7.3 Measurement of flow rate
7.4 Measurement of pressures and temperatures
8 Expression of results
8.1 Mean flow rate
8.2 Mean density and viscosity
8.3 Calculation of results
8.4 Final result
9 Test report
Annex A (informative) The flow of fluid through porous materials
Annex B (informative) Test fluids
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Foreword
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
3.1 Terms and definitions
3.2 Symbols and units
4 Principle
5 Test piece
6 Apparatus
6.1 Equipment
6.2 Test fluids
7 Procedure
7.1 Measurement of thickness and area of the test piece
7.1.1 Flat test pieces
7.1.2 Hollow cylindrical test pieces
7.2 Measurement of pressure drop
7.3 Measurement of flow rate
7.4 Measurement of pressures and temperatures
8 Expression of results
8.1 Mean flow rate
8.2 Mean density and viscosity
8.3 Calculation of results
8.4 Final result
9 Test report
Annex A (informative) The flow of fluid through porous materials
Annex B (informative) Test fluids