DS DS/EN ISO 13968
DS DSEN SO 13968 2008-NOV-07 Plastcs ppng and ductng systems - Thermoplastcs ppes - Determnaton of rng flexblty
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This International Standard specifies a method for testing the ring flexibility of a thermoplastics pipe having a circular cross-section. The method enables determination of the deflection, and necessary force, at which physical damage, if any, occurs within the specified diametric deflection.