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DNVGL RP F101 Pipeline Corrosion Modules

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CALCULATOR MODULE : DNVGL RP F101 Corrosion Line Pipe Schedule   ±

Calculate DNVGL-RP-F101 pipeline diameter and wall thickness schedule for corrosion.

The minimum wall thickness equals the nominal wall thickness minus the fabrication allowance. The pressure containment wall thickness equals the nominal wall thickness minus the fabrication allowance, and minus the corrosion allowance. Fabrication tolerance can be defined by either a fabrication allowance, or a fabrication fraction. The pipe diameter can be defined by either the outside diameter or the inside diameter. Use the Result Table option to display a table of pipe wall thickness versus schedule wall thickness for the selected diameter.

The pipe diameter can also be calculated from the measured circumference. Measuring the circumference is often the most convenient way to measure the pipe diameter.

Reference : DNVGL-RP-F101 : Corroded Pipelines (Download from the DNVGL website)

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CALCULATOR MODULE : DNVGL RP-F101 Single Corrosion Defect   ±

Calculate DNVGL RP F101 allowable pressure for single corrosion defects.

Allowable pressure can be calculated for pressure load only for single longitudinal defects. For circumferential defects, or defects with compressive axial load use the combined pressure and compression load calculator. For circumferential defects the defect width is greater than the defect length. The allowable pressure can be calculated using either the calibrated safety factor (CSF) in section 3, or allowable stress design (ASD) in section 4. The system effect factor accounts for the measurement uncertainty when there are multiple defects of a similar size.

Reference : DNVGL-RP-F101 : Corroded Pipelines (Download from the DNVGL website)

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CALCULATOR MODULE : DNVGL RP F101 Interacting Corrosion Defect   ±

Calculate DNVGL RP F101 allowable pressure for interacting corrosion defects with internal pressure load only.

Single defects which are closer together than the minimum defect spacing should be treated as interacting defects. The allowable pressure can be calculated using either the calibrated safety factor (CSF) in section 3, or allowable stress design (ASD) in section 4. The system effect factor accounts for the measurement uncertainty when there are multiple defects of a similar size. Use the Result Plot option to plot the dimesionless defect (1-d/t versus X/L), and the critical defect. The results for each n, m, combination are tabled at the bottom of the page.

Reference : DNVGL-RP-F101 : Corroded Pipelines (Download from the DNVGL website)

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CALCULATOR MODULE : DNVGL RP F101 Complex Corrosion Defect   ±

Calculate DNVGL RP F101 allowable pressure for complex corrosion defects with internal pressure load only.

The defect should be entered as a "river bottom" profile, with the maximum depth at each cross section. The pressure resistance can be calculated for either calibrated safety factor (CSF), or allowable stress design (ASD). The system effect factor accounts for the measurement uncertainty when there are multiple defects of a similar size. Use the Result Plot option to plot the dimesionless defect (1-d/t versus X/L), and the critical defect. The results for each depth increment are tabled at the bottom of the page.

Reference : DNVGL-RP-F101 : Corroded Pipelines (Download from the DNVGL website)

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CALCULATOR MODULE : DNVGL RP F101 Maximum Defect Depth   ±
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