ISO 7509:2015
Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of time to failure under sustained internal pressure
ISO 7509:2015 specifies a method for determining the time-to-failure of glass-reinforced thermosetting plastics (GRP) pipes under internal hydrostatic pressure at a specified temperature. The external environment can be air or water.
NOTE For other internal or external environments, the referring standard is to specify any additional requirement.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test pieces
6.1 Number
6.2 Free length
6.3 Cutting
7 Conditioning
8 Procedure
9 Detection of failure
9.1 General
9.2 Detection methods
9.2.1 Loss of test liquid
9.2.2 Drop in electrical resistance
10 Test report
Annex A (informative) Electronic leak/weep detection
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test pieces
6.1 Number
6.2 Free length
6.3 Cutting
7 Conditioning
8 Procedure
9 Detection of failure
9.1 General
9.2 Detection methods
9.2.1 Loss of test liquid
9.2.2 Drop in electrical resistance
10 Test report
Annex A (informative) Electronic leak/weep detection