cen:proj:81138

Thermoplastic piping systems for non-pressure underground drains and sewers - Determination of long term relaxation under constant deformation

Scope

This document specifies a method for the determination of long term relaxation under constant deformation of buried non-pressure thermoplastics pipes having a circular cross-section.
All measurements are performed under constant deformation and constant temperature.
Note 1 The test method is in principle applicable for fittings but not yet included.
Note 2 This method is based on EN ISO 9967 and SS 3519:1986