...-pipeline design standards, DNVGL-ST-F101 (2017), are stated to be valid only for pipelines with a diameter-to-wall-thickness ratio ( D/t ) between 15 and 45. The European Pipeline Research Group (EPRG) evaluated whether the existing design equations can be used for very thick-walled pipelines with D/t...

.... local buckling, fracture and fatigue). The design equations in the codes are calibrated to a target reliability level, e.g. in DNV-OS-F101 the target reliability level for a ‘medium’ safety class pipeline is 10 -4 (i.e. the probability of the limit state being exceeded is 10 -4 ). lateral buckle...

... carried out in this programme and other relevant experimental data related to buckling and/or collapse of pipes was collected in a database. The data were grouped for the different loading conditions and compared with design equations in the literature. From the comparison of the experimental data...

... the latter i.e. the hoop compressive SMYS, is normally increased by means of heat treatment at temperatures of about 200°C and above. A more strict control of these parameters may be helpful in reducing the wall thickness. The paper discusses the design equation against collapse of the Rules and Standards...

... loads, is addressed in this paper. Relevant loads considered for the local buckling check are bending moment/curvature and axial forces on the pipe shell. The effectiveness of the design equations of relevant Codes and Standards (API, ISO, and DNV) in light of the results of FE analyses that accounts...

... The Langeled Pipeline South (LPS) is characterized by a large diameter and thin steel wall giving rise to an outer diameter to thickness ratio, D/t, larger than 45. The local buckling design equation in DNV OS-F101 is explicitly defined as applicable for a pipe diameter to thickness ratio equal...

... load and depth of dent, rate of further deepening of dent due to increasing curvature and the longitudinal variation of dent depth of damaged tubulars. Design equation to predict the ultimate bending capacity is also presented herein. INTRODUCTION Drilling of deep sea oil and gas poses many new...

... ABSTRACT Design of pipes in the offshore industry implies use of design equations with appropriate safety factors to predict the resistance against failure modes such as burst and excessive plastic deformation. Analytical based equations for prediction of pipe burst and yielding deformation...

... was built up through about 320 runs of finite element (FE) analysis under five different load cases of brace and chord axial loads, in-plane-bending (IPB) and out-of-plane-bending (OPB) moments. A set of SCF design equations was established for general end loading. An assessment study of the equations...

... approaches, design criteria~ appropriate analysis methodology and safety factors for deep water floating systems. Special attention is dedicated to integrated mooring and riser design. design equation safety factor american petroleum institute weather procedure equation metallic riser subsea...

... strength fatigue strength stress range enph2-21l15 nail splice connection design equation experimental programme fatigue failure Proceedings of the Ninth (1999) International Offshore and Polar Engineering Conference Brest, France, May 30-June 4, 1999 Copyright © 1999 by The International Society...

... materials, pipe geometries and corrosion configurations. In this paper work conducted in the Det Norske Veritas (DNV) joint industry research project titled Reliability of Corroded Pipes is described. The goal of the project has been to develop a guideline with probabilistic calibrated design equations...

... which facilitates the evaluation of padeye strength in relation to its geometric ratios. The current results are shown to correlate closely with published experimental results and provide better correlation than some standard design equations. The effect of different padeye shapes, for the parametric...