... to nearby girth welds. Three-dimensional finite element (FE) models were developed to simulate pipeline dents and girth welds. Mesh sensitivity analysis was then performed to ensure the accuracy of the FE models. A Python script was created to automate 580 representative FE models. The primary objective...

... Abstract Under the action of external load, the crack driving force of the girth weld is greater than the fracture toughness of the material, which will lead to the fracture failure accident of the girth weld of the pipeline. As an important parameter of the failure limit state prediction model...

... Abstract In practical engineering scenarios, the establishment of a robust fracture criterion for girth welds featuring mixed mode cracks has become pivotal for ensuring pipeline safety. To account for the influence of shear deformation of micro-voids, the shear-modified Gurson-Tvergaard...

... elucidates the methodology employed to gauge the performance of three girth weld flaw assessment models: namely, the Kastner model, API 1104 Appendix A Option 2, and API 579. The proposed framework delineates a comprehensive analysis, originally devised for financial models, surpassing the conventional...

... Abstract The fracture toughness test under 100% hydrogen with testing pressure of 21 MPa was conducted on a recently produced Grade X80 linepipe and its seam and girth welds. For comparison, two X70 linepipes and one X65 linepipe and their welds were tested as well. For the X80 linepipe...

... 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...

... actions. This paper is a summary of PRCI-funded work aimed at characterizing material properties and flaw characteristics of vintage girth welds. The data obtained in this work can be utilized to understand and predict the behavior of vintage pipelines, which is covered in a companion paper [1...

... girth welds. The hard microstructures associated with arc burns are susceptible to hydrogen-induced cracking (HIC) in the presence of atomic hydrogen. Pipeline maintenance codes consider arc burns as defects and require their complete removal by grinding. Due to the relatively small dimension of arc...

... 07 04 2011 Girth Welding of high strength steels such as X80 or X100 poses a number of challenges because of the sensitivity of weld mechanical properties to variations in welding parameters and material properties. This dependency is further complicated by the application...

... 07 04 2011 The following cases of girth welded region between pipelines having different base strength were considered. The pipeline shows different fracture behavior from girth welded pipeline between similar materials due to strength mismatch and residual stress distribution...

... design girth weld toughness constraint effects 1 © Her Majesty the Queen in Right of Canada, represented by the Minister of Natural Resources, 2010 Proceedings of the 8th International Pipeline Conference IPC 2010 September 27 - October 1, 2010, Calgary, Alberta, Canada IPC2010-31385 TOUGHNESS...

... of the misalignment imperfection of girth weld joint is calculated by FEM to review the applicability of relevant formulas given in BS7910 for engineering critical assessment. Finally, it is concluded by FE simulation that though the stress magnification effect of shallow cracks in weld toe zone is significant...

... limited initial growth. This insensitivity allows the determination of CTOD A at the small amount of flaw growth. This feature establishes the connection between CTOD A and initiation-based toughness. Further work is under way to apply these findings. Pipeline girth weld strain-based design...

... 07 04 2011 Tensile strain capacity (TSC) is a critical component of the strain-based design of pipelines. TSC is affected by a number of material parameters, such as the strain hardening rate, weld strength mismatch, and toughness. Girth weld high-low misalignment, internal pressure...

... 10 07 2009 Stress analysis is a prerequisite of Engineering Critical Analysis (ECA) of pipeline girth welds in new constructions. Such analysis is required in pipe construction standards, such as API Standard 1104 Appendix A. However no specific procedures of stress analysis...

... 10 07 2009 Pulsed gas metal arc welding (P-GMAW) is one of the most effective joining methods used for mainline field girth welding of large diameter, long distance pipelines. Single torch and single wire P-GMAW utilizing narrow-groove weld geometry has been applied extensively in both...

.... The capacity of compressive axial strain of the pipe is affected by a large number of factors: D/t ratio, Y/T ratio, internal pressure and girth weld effect. Consequently, full solutions for compressive strain limits related to above-mentioned factors do not yet exist in codes and standards. In recent years...

... strain of the pipe is affected by a large number of factors: D/t ratio, Y/T ratio, internal pressure, girth weld effect, and defect size and location. Consequently, full solutions for tensile strain limits related to above-mentioned factors do not yet exist in codes and standards. In recent years...

... Proceedings of IPC2002 ep I W g C nic Go uan mismatched girth weld on property of the West-East Pipeline is analyzed. The study indicated that mismatch of girth w Pipeline, such as li threshold defect research results, s design, maintenanc KEY WORDS: g pipeline; limit load; INTRODUCTION Analyses...

... 10 12 2008 Girth welds in pipelines subject to longitudinal plastic tensile strains are critical regions of the pipeline. As girth welds might contain flaws of some form or other, it is of paramount interest to have a thorough understanding of the deformation characteristics of girth...