...Jinya Katsuyama; Tohru Tobita; Hiroto Itoh; Kunio Onizawa Stress corrosion cracking (SCC) in Type 316 L low-carbon austenitic stainless steel recirculation pipes have been observed near butt-welding joints. These SCC in Type 316 L stainless steel grow near the welding zone mainly because...

... linear transfer brick element (DC3D8) in a 3D thermal analysis. The model adopts the technique of element add and remove to simulate the weld filler variation with time in multipass butt-welded piping. All elements must be created, including those welds fillers to be born in later stages, and new...

... the speed at each interval during welding. The speed variation with respect to time is shown in Fig. 7 . The sequential 3D coupled field analysis has been carried out to predict the residual stress distribution in a butt welded plate. The nonlinear heat source model presented in this paper closely...

... operation, it is necessary to understand the effect of excessive loading, such as an earthquake, on the residual stress. Three-dimensional finite element analyses were performed using three-dimensional model for a 250A pipe butt weld of low-carbon stainless steel of type 316L. The welding simulation method...

... provided quantitative information about the residual stress in the plate butt welds, which is consistent with current understanding of such a welds ( 11 23 ). The transverse surface stresses are overestimated by both codes. The highest residual stresses in the transverse direction were found within...

... array has successfully demonstrated the ability of detecting and characterizing these defects using low frequency ultrasound. Factors addressed include joint location, wall thickness, material temperature, transducer wedge material, and manual versus automated data acquisition. butt welding flaw...

.... Then a probabilistic design methodology based on the ASME B&PV Code and focused on straight pipes with butt-welds is presented. The method ensures an acceptable reliability level for piping by keeping the failure probability within some upper threshold and accounting for the uncertainties of the design variables...

...A. H. Yaghi; T. H. Hyde; A. A. Becker; W. Sun; G. Hilson; S. Simandjuntak; P. E. J. Flewitt; M. J. Pavier; D. J. Smith Residual macrostresses in a multipass circumferentially butt-welded P91 ferritic steel pipe have been determined numerically and experimentally. The welded joint in a pipe...

...Katsumasa Miyazaki; Masanori Numata; Koichi Saito; Masahito Mochizuki The fixed conditions of butt welds between straight pipe and the valves or pump in an actual piping system are different from those of straight pipes. However, the effect of the fixed condition on the residual stress...

...Xu Zeliang Welding groove geometry is one of the factors determining the structure’s weld-induced deformation. There are three types of welding groove geometry available for a full-welded ball valve. Multipass butt-welded plate experiments and finite element analysis were applied to determine which...

... in place in contact with the elements of the base plate, and the interaction is made to be a function of time. This gave several flexibilities in modeling the welding process. Hence, the technique is then used to analyze simple fillet welding of a plate and circumferential butt welding of a pipe...