CrackA fracture or discontinuity in the wall of a pipeline, where the material is separated or broken, potentially compromising the integrity and safety of the pipel… propagation occurring under cyclic load conditions over time that is higher than the predicted crack growth for that material. AFCG occurs in different conditions, including corrosionThe deterioration or degradation of a pipeline caused by chemical or electrochemical reactions with its environment. Corrosion is a significant concern as it ca…, hydrogenA natural gas element used in non-destructive testing, hydrogen is a chemical element with the symbol "H" and atomic number 1. It is the lightest and most abun…, and environmental conditions.