More than design code calculations.
Assets and asset components are manufactured in accordance with design and fabrication codes and standards. However, these codes do not provide rules for evaluating equipment that contain flaws. To demonstrate the structural integrity of an in-service component that contains a flaw, fitness-for-service (FFS) assessments need to be conducted.
A flaw or defect in a component does not necessarily mean that the asset or component is no longer fit to perform its design intent. Using the FFS module in COMPASS, we can conduct most FFS assessments on-site and our inspection personnel can instantly determine suitability for continued operation. This prevents unnecessary, rushed or costly repair jobs.
FFS assessments are performed in accordance with codes or standards, e.g. API 579-1/ASME FFS-1. This comprehensive FFS standard specifies three levels of assessments for a number of different damage types, each with specific data and qualification requirements.
Assessments are high-level and conservative. NAS inspection personnel conduct these on-site for quick evaluations.
Assessments are detailed and can require more data. Depending on requirements, these assessments are conducted either on-site or off-site. NAS inspection personnel are familiar with FFS requirements. In most cases, they can obtain the required inspection data without the need for additional inspection mobilisation.
Assessments are comprehensive. They require detailed data and utilise finite element analysis (FEA) to determine the outcome.