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1 kwi 2024 · This paper provides a comprehensive review on the characteristics of strength mismatch, the difficulties faced in achieving weld strength over-match in high strength pipelines and the impact of weld strength under-match on structural integrity of pipelines.
Presentation includes: Contributing factors to recent girth weld failures. Strength matching requirements for pipeline girth welds in industry codes and standards. Importance of ensuring adequate strength so that axial strains do not accumulate at pipeline girth welds. Background.
Girth weld in hydrocarbon pipelines has to meet all requirements in terms of minimum tensile strength, fatigue strength, fracture arrest properties, corrosion resistance, hardness, ductility etc. equal to or higher than the base metal of pipe.
Abstract. Historically, girth weld inspection of Oil and Gas transmission pipelines has been carried out by film-based radiography. This technique provides easy-to-interpret, two-dimensional grayscale images of the weld and, with minimal training; an operator can interpret the image and determine the relative quality of the weld.
This study aims to investigate the ductile fracture characteristics of center cracks on the outer surface of girth welds in high-grade steel pipelines under external loads through large-scale CWP tensile tests and advanced numerical simulations.
11 cze 2024 · Internal pressure in pipeline service conditions significantly impacts the deformation behavior of both the pipeline steel and the girth welds. Using finite element analysis, Yang et al. [ 13 ] found that internal pressure greatly affects the strain capacity of undermatched girth welds.
1 sty 2022 · The full-scale pipeline girth weld is analyzed by finite element method. The results show that the area near the interface between the root weld layer and the filler weld layer of WM is the most significant strain concentration area under different internal pressures.
