NEN EN ISO 9969 : 2016
Current
The latest, up-to-date edition.
THERMOPLASTICS PIPES - DETERMINATION OF RING STIFFNESS
12-01-2013
Committees responsible
National foreword
Method
Foreword
1. Scope
2. Symbols
3. Principle
4. Apparatus
5. Test pieces
6. Conditioning
7. Procedure
8. Calculation of ring stiffness
9. Test report
Tables
1. Deflection speeds
2. Number of length measurements
Figures
1. Example of a device for measuring the inside diameter
of a corrugated pipe
2. Test piece cut out of a perpendicularly ribbed pipe
3. Test piece cut out of a helically wound pipe
4. Examples of the pipe-wall height ec
5. Method of correcting the origin
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