Answers are grounded in this paper and cite their sources.
Process piping welds are important because the equipment is a key component in energy and chemical processing. The study assesses repair and original welds using tensile tests, microhardness, microscopy, crack tip opening displacement (CTOD) at −29 °C and Charpy at three distinct temperatures, followed by statistical analysis and numerical modelling. Experiment involves the welding of 18-inch-diameter carbon steel piping materials. Correlogram delineates the primary factors of CTOD, whereas one-way ANOVA evaluates the influence of CTOD configurations. Weld centrelines (WCLs) without repairs exhibit superior CTOD values as compared to fusion lines. Tensile properties exceed those of the base metal, with average yield and ultimate tensile strengths of 479 MPa and 568 MPa for repair welds (RWs) and 516 MPa and 604 MPa for original welds, respectively. The overall minimum value of Charpy is 39 J at −29 °C, while the lowest CTOD values for repair and original welds are 0.204 mm and 0.44 mm, respectively, both above the 0.15 mm industry norm. Numerical modelling defines the overall correlation of CTOD with the ratios of average crack length to width and yield strength to tensile strength. Repair and original welds exceeded the requirements of ASME B31.3, improving performance and extending the operational lifespan of equipment.
No takes yet. Share an insight, caveat, or question.
Agag et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: