DIN EN ISO 18489:2025-11
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); German and English version prEN ISO 18489:2025 / Note: Date of issue 2025-09-26
| Fecha edición: |
2025-11-01
En Vigor
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| Idiomas disponibles: | Alemán, Inglés |
| Resumen: | This document specifies a method to determine the resistance to slow crack growth (SCG) of thermoplastic materials, pipes, and fittings. The test is applicable to samples taken from compression moulded sheets, extruded rods, sheets or pipes and injection moulded fittings of suitable thickness. This document provides a method that is suitable for an accelerated fracture-mechanics characterization at ambient temperatures of 23 °C. This document specifies test parameters for polyethylene (PE), polypropylene (PP) and unplasticized polyamide (PA-U). Furthermore, this test can be applied to characterise the slow crack growth resistance of virgin, as well as non-virgin (reused, recycled) thermoplastic materials. This test method can be adapted for other thermoplastics materials by developing the procedure using different test parameters. |
| Keywords: | Breaking strength|Crack|Crack tests|Crack toughness|Crack width|Cyclic|Definitions|Fittings|Materials|Notched|PE|Pipes|Plastic pipelines|Plastic pipes|Polyethylene|Resistance|Rods|Tensile strength|Testing|Thermoplastic polymers |
| ICS: | 23.040.45 - Accesorios de materiales plásticos, 23.040.20 - Canalizaciones de materiales plásticos |
| CTN: |
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