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ISO 9969:1994

Thermoplastics pipes — Determination of ring stiffness

Standard Details

The principle of the method specified is vertically compressing a length of pipe supported horizontally between two parallel flat plates moved at a constant speed which is dependent upon the diameter of the pipe, measuring the force and the deflection, plotting the force versus deflection, and calculating the ring stiffness as a function of the force necessary to produce a deflection of 0,03 nominal diameter diametrically across the pipe. Applies to pipes having a circular cross-section.

General Information

Status : WITHDRAWN
Standard Type: Main
Document No: ISO 9969:1994
Document Year: 1994
Pages: 5
Edition: 1
  • Section Volume:
  • ISO/TC 138/SC 5. General properties of pipes, fittings and valves of plastic materials and their accessories -- Test methods and basic specifications

Life Cycle

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ISO 9969:1994
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