Thinning residual life estimation
Calculation method:
There is thickness measurement data after the start of operation.
There is no data on thickness measurement, but the corrosion rate is known. Use attached Appendix.
Corrosion allowance:
mm
Corrosion allowance is unknown
Required thickness for design:
mm
Number of inspections (thickness measurement) conducted so far:
times
Most recent wall thickness measurement:
mm
Usage time at the time of the most recent thickness measurement:
hr
Initial wall thickness:
mm (Actual measured value or design value)
Previous thickness measurement:
mm
Usage time during the previous thickness measurement:
hr
Usage time up to now:
hr
Corrosion rate:
mm/year
The corrosion rates for each damage mechanism can be determined from the following appendix.
Atmospheric corrosion
High temperature oxidation
Steam oxidation
Freshwater corrosion
Seawater corrosion
Flow accelerated corrosion
Hydrochloric acid corrosion
Sulfuric acid corrosion
Hydrofluoric acid corrosion
Inspection effectiveness:
Thickness measurements were carried out over the entire target area. The inspection was conducted using visual inspection, UT, or radiographic methods.
Thickness measurements were taken only at the parts where corrosion was most concerning within the target area. The inspections were performed using visual examination, UT, or radiographic testing.
The measurement locations were chosen arbitrarily. Inspections were carried out by visual examination, UT, or radiographic methods.
Components:
Corresponding to pressure-resistant components (vessels, piping, etc., under the four domestic pressure vessel laws).