The Manufacturing and Production Characteristics of High Thickness and Small Diameter Deepwater Linepipe

摘要

As the limit state for the design of such linepipe is not guaranteed to be collapse, the manufacturer has to produce a high t/D linepipe that can meet the most demanding design limit state requirements, with any specific collapse element coming through extra testing. For low t/D linepipe, the predominant collapse mechanism is elastic and controlled primarily by the dimensional performance of the linepipe. For high t/D linepipe. one of the most frequently dominant collapse mechanisms that influences the design is plastic collapse, and it is the mechanical strength and shape of the linepipe that control this.