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ISO 18488:2015

Polyethylene (PE) materials for piping systems — Determination of Strain Hardening Modulus in relation to slow crack growth — Test method ISO 18488:2015

General information

90.92 Standard to be revised   Nov 15, 2023

ISO

ISO/TC 138/SC 5 General properties of pipes, fittings and valves of plastic materials and their accessories -- Test methods and basic specifications

International Standard

23.040.45   Plastics fittings | 23.040.20   Plastics pipes

Scope

ISO 18488:2015 specifies a method for the determination of the strain hardening modulus which is used as a measure for the resistance to slow crack growth of polyethylene.
The strain hardening modulus is obtained from stress-strain curves on compression moulded samples. This International Standard describes how such measurement is performed and how the strain hardening modulus shall be determined from such a curve. Details of the required equipment, precision, and sample preparation for the generation of meaningful data are given.
ISO 18488:2015 provides a method that is valid for all types of polyethylene, independent from the manufacturing technology, comonomer, catalyst type, that are used for pipes and fittings applications.
NOTE This method could be developed for materials for other applications.

Life cycle

NOW

PUBLISHED
ISO 18488:2015
90.92 Standard to be revised
Nov 15, 2023

REVISED BY

IN_DEVELOPMENT
ISO/CD 18488