naSRPS EN ISO 18489:2025

Polietilenski (PE) materijali za sisteme cevovoda — Određivanje otpornosti na spori rast naprslina pri cikličkom opterećenju — Metoda ispitivanja napuknute okrugle šipke

Thermoplastic materials for piping systems - Determination of resistance to slow crack growth under cyclic loading - Cracked Round Bar (CRB) test method (ISO/DIS 18489:2025)

Apstrakt

This International Standard specifies a method to determine the resistance to slow crack growth
(SCG) of polyethylene materials, pipes, and fittings. The test is applicable to samples taken from
compression moulded sheet or extruded pipes and injection moulded fittings of suitable thickness.
This International Standard provides a method that is suitable for an accelerated fracture-mechanics
characterization at ambient temperatures of 23 °C of different polyethylene grades, especially for PE
80 and PE 100 types for pipe applications.