Calculate defect standard deviation, partial safety factor and fractile value from measurement accuracy and confidence level (DNVGL-RP-F101 section 3.3).
The standard deviation is calculated for an assumed standard normal distribution. The sizing accuracy can be specified as either relative accuracy, or absolute accuracy. The partial safety factor and fractile value calculation is valid for standard devation ≤ 0.16;
Tool Input
- conftype : Confidence Level Type
- Cu : User Defined Confidence Level
- acctype : Sizing Accuracy Or Inspection Method Type
- rau : User Defined ± Relative Sizing Accuracy
- aau : User Defined ± Absolute Sizing Accuracy
- stdtype : Standard Deviation Calculation Type
- StDu : User Defined Standard Deviation
- safetype : Safety Class Type
- εdu : User Defined Fractile Value
- γdu : User Defined Partial Safety Factor
- tn : Pipe Wall Thickness
Tool Output
- γd : Corrosion Depth Safety Factor
- εd : Corrosion Depth Fractile Value
- C : Confidence Level
- StD : Standard Deviation
- aa : ± Absolute Sizing Accuracy
- ra : ± Relative Sizing Accuracy