FITNESS-FOR-SERVICE (FFS)

The ABI® test is useful where a life extension evaluation is planned for a component and adequate materials property data are not available. It is also used to measure properties for materials that may have service damage that has caused a change in tensile properties during service life (e.g. neutron embrittlement of nuclear pressure vessels).

Another important application is the determination of yield strength of ferritic steel components, such as oil and gas pipelines, when no documentation exists for the original and/or repair material and when a deterministic fitness-for-service evaluation is required for safe operation at current or higher (up-rated) pressures.