Thermoplastics fittings. Determination of ring stiffness Ingestion-build-156411

Thermoplastics fittings. Determination of ring stiffness Ingestion-build-1564111 Scope This International Standard 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 %. NOTE 1 If a fitting has the same wall thickness, wall construction, material and

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1 The calculation of the elastomechanical stress from the birefringence is not the subject of this International Standard

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EN 16348 applies