... pipe stress range test string piping simulation internal pressurisation pipe lay contractor alloy 625 upstream oil & gas qualification programme test sample mlp Introduction The use of MLP is a cost effective alternative to the use of conventional metallurgically clad pipe...

... artificial intelligence slug characteristic riser analysis olga node tdp slug bubble pair simulation riser sequence upstream oil & gas long period global weight variation weight variation slug form flow condition node variation slwr stress range correlation length fatigue...

... terminations (MCRAT). Fatigue testing is the primary method of assessment in this case, a series of nine fatigue trials spread over three stress ranges; 200MPa, 150MPa and 100MPa, have been scoped. Initial positive results have proven the concept of using the integrated liner system components in the dynamic...

... functions derived for the design curves of both S-N and T-N approaches to account for the mean load while keeping the same confidence of the existing curves. stress range fatigue testing amplitude chain diameter subsea system test data mbl fatigue performance fatigue test program different...

... with the procedures provided in ISO 1143 [ISO 1143. 2010] and statistical analysis provided in ISO 12107 [ISO 12107. 2012]. Stress Range Calculation The 3-D global model was subjected to the loading stages shown in Figure 4. It is noted that although an elastic-plastic material model was used, there was no plasticity...

... with the objective of establishing commonly accepted methods. Different FEA procedures have been studied for making a better prediction of stress ranges of the corroded chain links. The findings from the fatigue testing and FEA will be utilized as basis for further development of the methods for fatigue assessment...

... fluctuation spectrum over the frequency range of interest. The transfer function defines the relationship between the stress range (∆σ) and a unit pressure fluctuation (∆p) that is used to calculate the fatigue damage. It is assumed that the stress range reaches a maximum when the internal acoustic pressure...

... elastic and elastic-plastic material properties for comparison of results. Using the results of the FEA, stress range vs. cycles, S-N, and fatigue characteristics of the bolt assembly were evaluated based on the nominal bolt stress range vs. the root radius stress range in the highest stressed threads...

... temperature verification analysis test specimen hydraulic connector conductor connector stress range capacity chart analysis methodology upstream oil & gas hpht api 17tr7 offshore technology conference connector subsea system validation testing calculation Kaculi , J. T...

.... The design loads at a 10-8 probability level are considered for strength assessment and the long-term Weibull distributions of stress range are considered for the simplified fatigue assessment at critical locations. Introduction Floating production, storage and offloading (FPSO) facilities or floating...

... fatigue test stress range opb frequency testing program plane riser corrosion multiaxial fatigue criterion flowline corrosion mooring system fatigue mechanism seawater chain link upstream oil & gas loading sn curve Presentation of OTC-25779-MS Presentation of OTC-25779-MS...

... fatigue testing, and were run with a relatively low axial mean stress of 10 MPa (1.45 ksi) created by internal water pressure. Results showed at the lower cyclic stress range, 100 MPa (14.5 ksi), that most of the fatigue failures were outside of the connectors, while all of the higher cyclic stress range...

... in-service pipeline lateral buckling profiles. The calibrated FE model generates axial stress ranges at critical locations (buckle crown); these stress ranges are subsequently used to perform fatigue analyses. The estimated fatigue damage is used to forecast the pipelines long-term fatigue performance...

... stress range fatigue testing flange shrink-fit coupling riser diameter pipe drilling riser hydrotest pressure otc 24069 coupling shrink-fit connection assembly application specimen high strength steel fatigue life offshore technology conference OTC 24069 Fatigue Testing of Shrink-Fit...

... is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of OTC copyright. Abstract In pipelines designed to laterally buckle, start-up and shut-down cycles result in significant axial cyclic stress ranges experienced...

.... The test speed was finely controlled to achieve a constant stress range throughout the test, and set so that the average of the strain gauge readings corresponded to the required stress range. Two specimens (four welds) were tested at each of the three stress ranges: High 240N/mm2 Medium 170N/mm2 Low 120N...

...; and subsequently performing FEA to match the measured geometry and actual observed operating conditions, to determine the actual peak stresses/strains and stress ranges. By performing surveys and analyses, an accurate understanding of the pipeline behavior through life can be developed. Pipeline Walking Pipeline...

... fatigue damage, generally requires a high stiffness design. These conflicting requirements were satisfied by parameterising a base case design geometry and performing an automated design optimisation to minimise the fatigue-producing dynamic stress range (object function) under defined dynamic end loads...

... pressure vessel (c) For testing purposes, five different stress ranges were selected in the research programme. The defined stress ranges allow clearer definition of the S-N curve s slope with an adequate spread of the stress ranges along the material s stress service envelope. Concentrating the test...

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