NEN EN ISO 12958 : 2010

Foreword
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Apparatus and materials
6 Specimens
7 Test procedure
8 Calculations and expressions of result
9 Test report
Annex A (informative) Determination of the correction
        factor R[T] for conversion to a water temperature of
        20 degree C
Annex B (informative) Experimental data and calculations
        for a specimen

Defines a method for determining the constant-head water flow capacity within the plane of a geotextile or geotextile-related product.