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

ISO-18488 - 1ST EDITION - CURRENT


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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.

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23.040.20 (Plastics pipes)

23.040.45 (Plastics fittings)

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Document Number

ISO 18488:2015

Revision Level

1ST EDITION

Status

Current

Publication Date

Sept. 1, 2015

Committee Number

ISO/TC 138/SC 5