Effects of the UOE/UOC pipe manufacturing processes on pipe collapse pressure

Finite element analysis of cyclically-loaded steel pipes during deep water reeling installation

“…The yield stress of steel material Y σ is equal to 498 MPa (72 ksi). A similar curve has been reported in [19] for an X-70 grade steel. …”

Characterization of mechanical properties, fatigue-crack propagation, and residual stresses in a microalloyed pipeline-steel friction-stir weld

“…The base metal is strengthened through mechanical deformation during pipe forming. Pipe forming processes (e.g., the UOE process [32]) imparts plastic deformation on the skelp as the flat plate is bent around forming dies. This deformation effectively increases yield strength of the pipe to meet the minimum yield strength specification.…”

Nonlinear Finite Element Analysis

“…For the case of cylindrical shell structures, a type of structures that is particularly sensitive to imperfections, imperfections affine to the collapse mode of the perfect shell were found to be more unfavorable than ideal buckling modes (Schneider and Brede 2005;. Furthermore, fabrication processes are responsible for imperfection patterns, creating residual stress profiles in the body of the cross sections, which can have significant consequences on the ultimate bearing capacity of steel structures (Berry et al 2000;Herynk et al 2007). However, the choice of manufacturing-related imperfection patterns is usually dependent upon the structural type as well as the specific manufacturing method, cannot be easily generalized, and often lacks adequate data to be properly implemented.…”