A model to predict fatigue crack growth of API pipeline steels in high pressure gaseous hydrogen has been developed and is presented elsewhere. The model currently has several parameters that must be calibrated for each pipeline steel of interest. This work provides a sensitivity analysis of the model parameters in order to provide (a) insight to the underlying mathematical and mechanistic aspe...

Although the use and promotion of renewable energies have increased in recent years, it is evident that fossil fuels such as oil gas continues to be great importance. Likewise, pipelines are widely recognized most reliable profitable means transportation for liquid gaseous hydrocarbons. Nevertheless, due nature hydrocarbons, continually exposed deterioration by corrosion mechanical damage. In t...

To understand the behavior of corrosion films on X65 C-steel under CO2 conditions is paramount to identify formation and transformations products. This work presents chemical changes mechanical effects produced by pH flow through combination molecular techniques with imaging. Siderite, wustite magnetite were identified as products at neutral pH, which dissolved damaged low a 1m/s brine crystal ...

Pipe elbows (bends) are considered critical pressurized components in the piping systems and pipelines due to their stress intensification effect of bend curvature. They prone hence more exposed different corrosion failure modes than straight pipes. Late detection such elbow damages can lead dangerous emergency situations which cause environmental disasters, pollution, substantial consumer loss...

In this research, stress-oriented hydrogen induced cracking (SOHIC) test was carried out on a 50 mm thickness of commercial API 5L X70 steel plate. The evolution microscopic features such as phase, boundary, interface, grain, and crystallographic data analyzed before after SOHIC, in order to comprehend the effect orientation SOHIC propagation. Chemical composition previous thermomechanical proc...