... identified through sensitivity studies and used in a large scale FEA-based parametric study to develop closed-form tensile strain capacity equations for different limit states. A key parameter affecting tensile strain capacity of welded pipelines is the tearing resistance (CTOD R-curve). Small-scale testing...

... in determination of the allowable operating pressure. The second approach is based on the allowable stress design format, where the allowable operating pressure is determined from the capacity and multiplied with a single usage factor based on the original design factor. The development of the capacity equations...

... materials and corrosion model uncertainty test result flowline corrosion capacity equation modification strength database Proceedings of tile Eleventh (2001) International Offshore and Polar Engineering Conference Stavanger, Norway, June 17-22, 2001 Copyright © 2001 by Tile International Society...

... of the joints and to propose an ultimate capacity equation. From the test observations, it was found that failure of the specimens was due to plastification of the chord wall under the compressive braces. The behavior shows that compressive loads redistributed from the diagonal braces to the vertical braces...

... and multiplied with a single usage factor based on the original design factor. In this paper, focus is on the single defect in the first approach, being in accordance to the safety philosophy adopted in the DNV Offshore Standard OS-F101. The burst capacity equation is described, and the acceptance equation...

.... In this paper the results of further strength-sensitivity studies are presented. Three areas of possible concern on the degree of conservatism in-built in the capacity equation were identified. These are: effects on strength of the presence/absence of the plastic plateau in the material curve strength...

... in the buckling/collapse calculations. external pressure collapse capacity hoop stress analytical equation cross section capacity equation upstream oil & gas axial force riser corrosion equation flowline corrosion analytical capacity equation pipeline corrosion internal pressure corrosion...