Pattern The degradation pattern is the form that the general damage mechanism takes, for example, cracking or external pitting. See Also Mechanism A degradation mechanism is the type of deterioration that could lead to asset failure. Examples are corrosion, erosion, mechanical failure, and pitting. See Also Category The degradation category provides a broad descriptor for identifying and grouping degradation types. Examples are environment-assisted cracking, mechanical and metallurgical failure, and uniform and localized loss of thickness. See Also Scope The scope of the degradation typically describes the extent of deterioration. Examples are Localized-Internal and General-External. See Also Credibility A failure mode’s credibility value indicates how technically feasible it is or the extent to which it is physically capable of occurring. See Also Type Examples of degradation types are age-related, non-age-related, and strategy-based. See Also Technology Technologies are the means used to examine or test equipment for signs of wear. See Also Material type The material type identifies the substance from which the equipment is made and which is subject to deterioration. See Also Theoretical yearly rate Theoretical rate is the estimated rate of deterioration based on expert opinion, equipment specifications, or historical data. It can differ from the asset design rate based on the analysts’ experience and expectations. See Also Temperature range Range of temperatures in which the damage mechanism might occur. See Also Process Process is an aspect of the operating environment in which the damage mechanism is prone to occur. Examples are hydrogen, phosphoric acid, and carbon. See Also Flow Flow is an aspect of the operating environment in which the damage mechanism is prone to occur. Examples are motionless-static and hydrodynamic. See Also Load type Load type is an aspect of the operating environment in which the damage mechanism is prone to occur. Examples are static stress, cyclic stress, and impact. See Also Degradation note Provide a more detailed description of the asset’s degradation. See Also
