Published
ISO 13967:2009 specifies a method of determining the ring stiffness of bends and branches made from thermoplastic material and for use with plastics pipes having a circular cross-section. The method can be used to determine the stiffness of bends, equal branches and unequal branches, provided the fitting allows a diametric deflection of at least 4 %.
WITHDRAWN
ISO 13967:1998
PUBLISHED
ISO 13967:2009
90.60
Close of review
Sep 3, 2025
Thermoplastics fittings - Determination of ring stiffness (ISO 13967:2009)
60.60 Standard published