ISO 9969:2016

ISO 9969:2016 specifies a test method for determining the ring stiffness of thermoplastics pipes having a circular cross section.

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The Requirements department helps you quickly locate within the normative text:

• mandatory clauses to satisfy,
• non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document "ISO/IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents" as well as on a constantly enriched list of verbal forms.

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