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Determination of ring flexibility.
A sample (pipe) is subjected to a constant force of velocity until at least the specified deformation is reached, or before if the sample fails. The performance of the sample is observed to detect signs of possible mechanical failure.
Plastics piping systems for buried drainage and sewage without pressure (structured wall) made of:
Unplasticized poly (vinyl chloride) (PVC-U) EN 13476-1, -2, -3) EN 13476-1, -2, -3