Aktívna norma | Vydaná: 29.09.2011

ISO 23228:2011

Thermoplastics pipes for the conveyance of fluids — Determination of the stress-rupture resistance of moulding materials using plain strain grooved tensile (PSGT) specimens
(Tubes en matieres thermoplastiques pour le transport des fluides — Détermination de la résistance a la rupture sous contrainte des matériaux de moulage, au moyen d´éprouvettes de traction rainurées a déformation plane)

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Podrobné informácie

Označenie: ISO 23228:2011

Dátum vydania: 29.09.2011

Stránok: 9

Krajina: Medzinárodná technická norma

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Anotácia

Description / Abstract: ISO 23228:2011 specifies a method for the determination of the time-to-failure of thermoplastics resins and compounds for piping and fitting applications by the use of a plane strain grooved tensile specimen in a stress-rupture test. The grooved tensile specimen produces a biaxial state of stress on uni-axial loading, which is taken to be indicative of the stress conditions found in pressurized solid-wall plastics pipes. The ratio of the stress in the axial direction to the transverse direction approximates that for a pressurized end-capped solid-wall pipe specimen. It is intended that the data generated on these specimens be utilized to determine the stress-rupture (time-to-failure) resistance of moulding materials for pipes and fittings as well as experimental piping resins. This method is also applicable to stress-rupture evaluations of pipes which are difficult to test, e.g. larger diameter pipes, including their batch release tests. ISO 23228:2011 is not intended to replace the stress-rupture test of ISO 1167, which uses internally pressurized end-capped pipes.

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