All British Gas Transmission pipelines are hydraulically tested before commissioning, and periodic testing has been used by several pipeline operators as a means of re-validation. The object of the test is to prove there are no defects which could cause failure under operating conditions. Pipeline re-testing however is expensive, inconvenient and often impractical. It requires duplication of the system to enable pipe sections to be de-commissioned and isolated for the test. As a means of condition monitoring hydraulic re-tests are most unsatisfactory. The test only confirms the absence of defects above the test threshold. No meaningful information is obtained about the type or number of defects which survive the test or about their growth mechanisms which could lead to future failure.
Condition monitoring of British gas pipelines
Zustandsüberwachung von britischen Gasfernleitungen
1989
9 Seiten, 1 Bild, 3 Tabellen
Conference paper
English
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