... fatigue analysis, fatigue crack growth fracture mechanics, finite element analysis (FEA) and crack growth testing on pipe material from the same heat batch as the installed joint of the crossing, as well as from two test welds prepared on the same pipe material using two welding procedures used...

... not address the fatigue growth of a complex crack-like feature. The present article fills this knowledge gap. Fatigue crack growth was analyzed in finite element simulations of 50 complex crack features that have been reported by ILI vendors. Based on the finite element results, an analytical methodology...

... Abstract Compressor station expansion projects present a risk of fatigue failure due to flow-induced vibration. Flow-induced vibration mechanisms relevant to compressor stations include flow-induced turbulence, vortex-induced vibration on barred tees and thermowells, and flow-induced pulsations...

... Abstract Prioritization of crack-like features for remediation requires a burst pressure assessment as well as a fatigue life assessment to ensure all features are managed accurately. As the ability of in-line inspection technologies to provide complex feature profiles becomes more commonplace...

.... A workflow was also developed to conduct fatigue crack growth assessment on dents interacting with cracks/gouges in accordance the CFR Mega Rule requirements. Finally, a software tool has been developed to automate the dent ECA process. With this automation, the efficiency in conducting dent ECA could...

... are required and the success of any applied mitigations. While this approach is more involved, it may remove excess conservatism, leading to reduced overall costs. pulsation vibration fatigue FFS reciprocating pump compressor acoustic simulation modeling predictive analysis mitigation...

... conducted to link small-scale testing to full-scale behaviour. Longer term, full-scale, fatigue testing of defects and new connections are underway. Operational activities, such as hydrogen flaring, live welding, and under-pressure drilling, have been investigated. An overview of testing completed to date...

... hydrogen fracture framework (HELPR), and discusses the complement to full-scale testing. hydrogen testing fatigue high-pressure subscale testing Proceedings of the 2024 15th International Pipeline Conference IPC2024 September 23-27, 2024, Calgary, Alberta, Canada IPC2024-134173 HYDROGEN...

... Abstract An ongoing study is assessing the suitability of line pipe materials for use in gaseous hydrogen transmission pipelines. Previous publications present fracture and fatigue testing of the parent and seam weld centre line microstructures of an offshore 1970’s API 5L X60 grade SAW...

... waves (and potential fatigue damage), which sometimes goes unrecognized. To predict the damage accumulation at planar circumferential flaws (e.g., girth weld defects) from repeated hammering, flaw growth analyses were performed via Paris Law fracture mechanics formulations. An initial flaw based on NDE...

... with refinement and additional validation testing is recommended for future work. Keywords: Crack, Growth, Re-inspection, Fatigue, Probabilistic, Post-Hydrostatic Test, Post ILI, Reliability NOMENCLATURE C CFP DSAW ERW ILI K LRF l m MOP MTTF NDE N PBP PHT POD SAW SMYS SSI TTF Paris law coefficient Cumulative...

... Abstract Dents in buried pipelines either caused by third party mechanical damage or introduced during pipeline construction remain a leading contributor to reportable pipeline releases. API Recommended Practice 1183 (API RP 1183) provides a modern, shape-based fatigue life assessment...

... on a literature review and verified by small- and full-scale testing. The product of the work is an assessment tool that identifies SCC cracks that are appropriate for recoating without grinding. recoating grinding fatigue integrity management Proceedings of the 2022 14th International Pipeline...

... of fracture toughness and fatigue, through embrittlement or hydrogen induced cracking. Fracture toughness as a measure of crack arrest performance through required Charpy (TCVN) performance represents a principal mechanical property requirement of the pipeline. Ductility performance, regardless...

... of effects including hydrogen embrittlement, increases to fatigue crack growth rate, and reductions in ductility and yield strength when exposed to susceptible steels under stress. These potential effects may vary based on the vintage, strength of steel, weld type, and other specific pipeline characteristics...

... Abstract Structural steel mechanical properties of strength and ductility for a given microstructure are predominately driven by the average ferrite grain/packet size and by the through-thickness homogeneity of the ferrite grain/packet size in the final product. Fatigue performance, a ductility...

... was to demonstrate restoration of the fatigue life of the pipe to acceptable levels rather than just considering burst pressure. Defects equal to 0.5 times the diameter axially and 0.25 times the diameter radially were machined into the intrados of the bend (the location of highest hoop stress). Wall losses of 20...

... and utility. Fully established negligible growth thresholds pave the way toward adoption of next-level fracture mechanics best practice models and tools such as AFGROW and NASGRO, and facilitates crack growth simulations and root-cause analysis. fatigue pipeline crack inspection interval...

... with rationale for each term is proposed for the pipeline segments examined in the study, and recommendations made for potential implementation for other operators, along with follow-on research. fatigue pipeline crack inspection interval NEAR NEUTRAL PH STRESS CORROSION CRACK GROWTH MODEL...

... is not expected to fail immediately, however, severe pressure cycles combined with the geometric distortion can cause fatigue crack initiation and growth that can lead to failure. To account for the possibility of fatigue failure, recent changes to pipeline codes, such as CSA Z662, are requiring pipeline...