NS EN 1279-3 : 1ED 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions and symbols
4 Requirements
  4.1 Gas leakage rate
  4.2 Tolerances on gas concentration
  4.3 Dew point and moisture penetration index
  4.4 Edge seal strength
  4.5 Additional requirements for other gases than argon,
      sulfurhexafluoride and air
5 Testing
  5.1 Principle of testing
  5.2 Apparatus
      5.2.1 Climate exposure equipment
      5.2.2 Container for gas leakage rate measurement
      5.2.3 Gas analysis equipment
      5.2.4 Gas sampling device
  5.3 Test specimens
      5.3.1 Preparation of test specimens
      5.3.2 Number of test specimens
      5.3.3 Construction and appearance
  5.4 Procedure
      5.4.1 Determination of internal volume of a test
            specimen
      5.4.2 Climate exposure
      5.4.3 Measuring the gas leakage
      5.4.4 Analysis of gas
  5.5 Evaluation
6 Precision of test method
7 Test report
Annex A (normative) - Requirements for other gases
    A.1 Durability of the gas and interaction with
        insulating glass components
    A.2 Effect on thermal- and sound insulation
    A.3 Assessment example with krypton gas filling
Annex B (informative) - Relationship between artificial
        and natural ageing with regard to thermal and
        sound insulation
Annex C (informative) - Determination of the gas leakage
        rate by gas chromatography
    C.1 Principle of method
    C.2 Equipment
        C.2.1 Full container
        C.2.2 Ring container
        C.2.3 Cooling trap
        C.2.4 Gas chromatograph
        C.2.5 Connecting pieces
        C.2.6 Solvents
        C.2.7 Purging and carrier gas
        C.2.8 Calibrating gas
    C.3 Preparation of test specimens
    C.4 Procedure
        C.4.1 Connection of the apparatus
        C.4.2 Installation of the test specimen
        C.4.3 Temperature
        C.4.4 Calibration
        C.4.5 Measurement of the gas leakage
        C.4.6 Blank test
        C.4.7 Result
Bibliography

Defines insulating glass units, and ensures by means of an adequate evaluation of conformity to this standard that: - energy savings are made because the U-value and solar factor do not change significantly; - health is preserved because sound reduction and vision do not change significantly; - safety is provided because mechanical resistance does not change significantly. The main intended uses of the insulating glass units are installations in windows, doors, curtain walling, roofs and partitions where there exists protection against direct ultraviolet radiation at the edges.