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Girth welding is the process of connecting two pipes by welding around their circumference. As the welding is done around the pipe circumferences, girth welding is also popular as circumferential welding. Several welding passes are required to create a proper weld joint.
The girth weld cracking in oil and gas pipelines has the characteristics of long crack length and large leakage, which poses a serious threat to the safety of surrounding personnel, environment and pipeline transportation.
In this paper, we took a closer look at the patterns of girth weld failure and leaks in 64 girth-welding accidents and created a Bayesian model that predicts the probability of a girth weld maintaining its integrity in the future.
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.
11 cze 2024 · The tested Shielded Metal Arc Welded (SMAW-ed) pipe exhibited undermatched girth welds due to high heat input, while Gas Metal Arc Welding (GMAW) introduced a narrower weld and Heat-Affected Zone (HAZ) with higher hardness than the base metal, indicative of overmatched girth welds.
Introduction. Core to the construction of a pipeline is girth welding of line pipes i.e. faster the welding rate, more is the progress achieved. Girth welding (Ref 1) process is involved in mainline welding, tie-in welding and repair welding of the line pipes.
Girth weld coatings are applied in the field where the conditions are not as good as in the mill where the mainline coatings are applied. Their performance depends on the bonds to the substrate and to the mainline coating, the moisture seal at the joints, and water absorption.
