Reference standards for the RFT inspection of tubular products
come in many variations. In order to produce reliable and consistent
test results, the material used for manufacturing calibration standards
must closely match the physical and chemical properties of the
inspection specimen. Some of the important properties that must
be considered include conductivity, permeability and alloy content.
In addition, tube dimensions including I.D., O.D. and wall thickness
must also be controlled.
type of damage mechanisms that are expected to be encountered
must also be carfully considered when developing or selecting a reference standard. In order to get accurate quantitative data,
artificial discontinuity conditions are typically machined into
the standards that will closely match those conditions that may
be found in the tubing bundle.