Defect tolerance in pipeline girth welds
Defect tolerance in pipeline girth welds
- Neue Suche nach: Hopkins, P.
- Neue Suche nach: Jones, D.G.
- Neue Suche nach: Fearnehough, G.D.
- Neue Suche nach: Hopkins, P.
- Neue Suche nach: Jones, D.G.
- Neue Suche nach: Fearnehough, G.D.
This paper reviews the background to the definition of tolerable defect levels for defect in automatically welded girth welds for offshore application. Laboratory tests on defective samples and confirmatory full size bend/pressure tests gave a relationship between stress level for failure and defect size. In the case of ductile failure, the tests and complementary finite element stress analyses showed that plastic collapse criteria adopted in published recommendations can be unnecessarily conservative. This is particularly so for the high stress levels which can occur during laying of offshore pipelines. An alternative defect acceptance level was proposed for this application. The result is a standard which has considerable benefit in offshore girth welding in permitting embedded planar defects equivalent to one weld pass depth.
Dokumentinformationen
Defect tolerance in pipeline girth welds
Fehlertoleranz in Umfangsschweissungen von Rohrleitungen
Circumferential Cracks in Pressure Vessels and Piping ; PVP-95 ; 173-187
1984
15 Seiten, 9 Bilder, 1 Tabelle, 21 Quellen
Aufsatz (Konferenz)
Englisch
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