ISO 13479:2022
Polyolefin pipes for the conveyance of fluids — Determination of resistance to crack propagation — Test method for slow crack growth on notched pipes
This document specifies a test method for determining the resistance to slow crack growth of polyolefin pipes, expressed in terms of time to failure in a hydrostatic pressure test on a pipe with machined longitudinal notches in the outside surface. The test is applicable to pipes of wall thickness greater than 5 mm.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
3.1 Terms related to geometrical dimensions
3.2 Terms related to machining of notches
4 Symbols and abbreviation
4.1 Symbols
4.2 Abbreviated terms
5 Principle
6 Apparatus
7 Test piece preparation
7.1 General
7.2 Test pieces
7.3 Notch location and measurement of dimensions
7.4 Machining the notches
7.5 Number of test pieces
8 Conditioning
9 Procedure
9.1 Hydrostatic-pressure testing
9.2 Ligament thickness measurement after testing
10 Test report
Annex A (normative) Ligament thicknesses
Annex B (informative) Test-pressure levels for polyethylene
Annex C (informative) Recommended requirements for polyethylene
Annex D (normative) Test procedure for the accelerated notched pipe test (ANPT) for PE 100-RC pipes
Annex E (normative) Method of measuring notch radius
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
3.1 Terms related to geometrical dimensions
3.2 Terms related to machining of notches
4 Symbols and abbreviation
4.1 Symbols
4.2 Abbreviated terms
5 Principle
6 Apparatus
7 Test piece preparation
7.1 General
7.2 Test pieces
7.3 Notch location and measurement of dimensions
7.4 Machining the notches
7.5 Number of test pieces
8 Conditioning
9 Procedure
9.1 Hydrostatic-pressure testing
9.2 Ligament thickness measurement after testing
10 Test report
Annex A (normative) Ligament thicknesses
Annex B (informative) Test-pressure levels for polyethylene
Annex C (informative) Recommended requirements for polyethylene
Annex D (normative) Test procedure for the accelerated notched pipe test (ANPT) for PE 100-RC pipes
Annex E (normative) Method of measuring notch radius
Bibliography