NEN EN 723 : 2009
Current
The latest, up-to-date edition.
COPPER AND COPPER ALLOYS - COMBUSTION METHOD FOR DETERMINATION OF THE CARBON CONTENT ON THE INNER SURFACE OF COPPER TUBES OR FITTINGS
12-01-2013
Foreword
1 Scope
2 Normative references
3 Definitions
3.1 Residual carbon
3.2 Potential carbon
3.3 Total carbon
4 General principle
5 Preparation of samples
5.1 General
5.2 Selection of samples
5.3 Cleaning of inner surface of sample
5.4 Cleaning of outer surface of sample
5.5 Cutting of test pieces
6 Combustion method for carbon-containing products
7 Methods for carbon content determination
7.1 General
7.2 Method using tetrabutylammonium hydroxide (HTBA)
7.3 Method of determination by measurement of
differential electrical conductivity
7.4 Method of determination of infrared absorption
spectrometry
7.5 Determination of blank value
8 Expression of results
9 Calibration
10 Test report
Defines a combustion method for determining the carbon content, if any, on the inner surface of tubes of copper or fittings of copper or copper alloys. Applies only to seamless, round copper tubes as specified for example in EN 1057 and EN 13348 or fittings of copper or copper alloys as specified in EN 1254 (all parts).
| DocumentType |
Standard
|
| PublisherName |
Netherlands Standards
|
| Status |
Current
|
| Standards | Relationship |
| I.S. EN 723:2009 | Identical |
| DIN EN 723:2009-07 | Identical |
| EN 723:2009 | Identical |
| UNE-EN 723:2010 | Identical |
| BS EN 723:2009 | Identical |
| UNI EN 723 : 2009 | Identical |
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