ISO 13968:2008 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.
Tämän julkaisun valmistelusta Suomessa vastaa Muoviteollisuus ry, puh. 09 172 841 (vaihde).