... Abstract The MAT-8 fracture model has been widely applied in the pipeline industry since it was first introduced in 2016. It was recently modified to handle burst pressure predictions in pipe joints with axial surface flaws with complex depth profiles. However, this recent innovation did...

... Abstract An ongoing study is assessing the suitability of line pipe materials for use in gaseous hydrogen transmission pipelines. Previous publications present fracture and fatigue testing of the parent and seam weld centre line microstructures of an offshore 1970’s API 5L X60 grade SAW...

... of hydrogen and CO 2 . For hydrogen pipelines, sufficient fracture toughness is one of the key design requirements in ASME B31.12. Further, blue hydrogen production requires capturing CO 2 after steam methane reforming and transporting to an underground sequestration site. However, the impact of residual H 2...

... there was significant plastic straining during hydrotesting, although the plastic strains and elastic residual stresses vary through the thickness from tension to compression. For evaluations using existing fracture mechanics models, evaluations of hydrogen effects on the burst pressure of axial surface flaws in pipes...

... of fracture toughness and fatigue, through embrittlement or hydrogen induced cracking. Fracture toughness as a measure of crack arrest performance through required Charpy (TCVN) performance represents a principal mechanical property requirement of the pipeline. Ductility performance, regardless...

... Abstract In recent years increased attention has been given to the transferability of standardized fracture test data to thin-walled pressurized equipment. For smaller diameter piping, for example, standard test specimens loaded in “hoop” tension are not possible due to pipe curvature...

... of the calculations to the calculation method used and to the input data, such as flaw profile, are examined. The results provide useful guidance to all those involved in predicting failure pressures as part of their threat management activities. Keywords: stress-corrosion cracking, fracture, failure pressure...

..., and then applied the preliminary failure assessment to the spiral welded defects of oil pipeline, with the use of ultrasonic inspection data of Daqing-Tieling old pipeline from LingYuan to XinMiao, Northeastern China. The calculation of both fracture and plastic collapse failure for spiral welded defects indicates...

... fracture mechanics analysis was developed using the T-stress approach. Cracked body finite element analyses were used to obtain the T-stress for a range of surface breaking and buried defects in typical linepipe geometries. The results from these models were used to develop a constraint modified Failure...

... of ductile fracture referenced to peak pressure and hold-time, and then contrasts these to the response in low-toughness situations. Fracture properties typical of an early-vintage electrical-resistance weld (ERW) seam were determined and used as the basis to simulate the response at toughness levels typical...