| Links : ± |
CALCULATOR MODULE : ASME B31.4 Liquid Pipeline Ripple Defect ±
Calculate ASME B31.4 oil and liquid pipeline allowable ripple defects from hoop stress for onshore and offshore pipelines. Reference : ANSI/ASME B31.4 : Pipeline Transportation Systems For Liquids And Slurries (2012) Change Module : |
CALCULATOR MODULE : ASME B31.8 Gas Pipeline Ripple And Dent Defect ±
Calculate ASME B31.8 gas pipeline ripple defects, dents and gouges for onshore and offshore pipelines. Reference : ANSI/ASME B31.8 : Gas Transmission And Distribution Piping Systems (2018) Change Module : |
CALCULATOR MODULE : ASME B31G Pipe Corrosion Defect ±
Calculate ASME B31G piping level 0 corrosion defect assessment for blunt defects (corrosion defects or other defects). The level 0 assessment is useful as a screening check. The allowable defect length is calculated from the maximum defect depth. The calculation is taken from ASME B31G 1999 (original ASME B31G). The level 0 check is suitable for blunt defects of all types, including corrosion, mechanical damage and grinding repairs etc. For crack type defects the NG-18 crack defect calculators are recommended. The RSTRENG method (effective area method) can also be used for blunt type defects. The temperature derating calculation is from ASME B31.8. Material specific test data should be used if it is available. Defects failing the level 0 check should be checked with a level 1 or level 2 assessment (see module links below). Use the level 1 assessment for simple defects from defect length and depth using either the original ASME B31G equation, or the modified ASME B31G equation. Use the level 2 assessment for complex defects from the defect river bottom profile. Reference : ANSI/ASME B31G Manual For Determining The Remaining Strength Of Corroded Pipelines (2012) Change Module : |
CALCULATOR MODULE : ASME B31G Level 1 Defect Assessment ±
Calculate ASME B31G level 1 corrosion defect assessment for blunt type defects. The level 1 assessment calculates the allowable pressure from the maximum defect depth and defect length, using either the original ASME B31G method (1999), or the modified ASME B31G method. Pressure derating is required if the allowable pressure is less than the maximum operating pressure. The flow stress can be calculated as either 1.1 x SMYS, SMYS + 69 MPa, or 1/2 (SMYS + SMTS). For pipelines operating at high temperature, the SMYS and SMTS should be derated. For submerged pipelines, or to calculate the allowable pressure at a reference elevation, use the level 1 calculator including elevation. The allowable local pressure is calculated including external pressure (use the external pressure = 0 for dry pipelines). The allowable reference pressure is calculated from the local allowable pressure, and the relative elevation. ASME B31G is suitable for blunt defects of all types, including corrosion, mechanical damage and grinding repairs etc. For crack type defects the NG-18 crack defect calculators are recommended. The effective area method can also be used for blunt defects. Reference : ANSI/ASME B31G Manual For Determining The Remaining Strength Of Corroded Pipelines (2012) Change Module : Related Modules : |
CALCULATOR MODULE : ASME B31G Level 2 Defect Assessment ±
Calculate ASME B31G level 2 corrosion defect assessment for blunt type defects. The level 2 assessment calculates the allowable pressure from the defect "river bottom" profile using the effective area method (also known as the RSTRENG method). Pressure derating is required if the allowable pressure is less than the maximum operating pressure. The flow stress can be calculated as either 1.1 x SMYS, SMYS + 69 MPa, or 1/2 (SMYS + SMTS). For pipelines operating at high temperature, the SMYS and SMTS should be derated. For submerged pipelines, or to calculate the allowable pressure at a reference elevation, use the level 1 and level 2 calculators including elevation. The allowable local pressure is calculated including external pressure (use the external pressure = 0 for dry pipelines). The allowable reference pressure is calculated from the local allowable pressure, and the relative elevation. ASME B31G is suitable for blunt defects of all types, including corrosion, mechanical damage and grinding repairs etc. For crack type defects the NG-18 crack defect calculators are recommended. The effective area method can also be used for blunt defects. Reference : ANSI/ASME B31G Manual For Determining The Remaining Strength Of Corroded Pipelines (2012) Change Module : Related Modules : |
CALCULATOR MODULE : AGA NG18 Crack Defect ±
Calculate AGA NG-18 Level 0 critical defect length and minimum required fracture toughness from flow stress and hoop stress. The level 0 assessment is useful as a screening check for crack defects. The level 0 check is from AS 2885.1. The temperature derating calculation is from ASME B31.8. Material specific test data should be used if it is available. Use the level 1 assessment for simple defects from defect length and depth. Use the level 2 assessment for complex defects from the defect river bottom profile. Refer to the module list below. AGA NG-18 is suitable for crack defects. For blunt defects including corrosion, mechanical damage and grinding repairs etc the ASME B31G or RSTRENG calculators are recommended. Reference : AGA Pipeline Research Committee NG-18 Report 204 Ductile Fracture Properties of Selected Linepipe Steels Change Module : Related Modules : |
CALCULATOR MODULE : AGA NG18 Level 1 Defect Assessment ±
Calculate AGA NG-18 level 1 crack defect assessment. The level 1 assessment calculates the allowable pressure from the maximum defect depth and defect length. Pressure derating is required if the allowable pressure is less than the maximum operating pressure. The flow stress can be calculated as either 1.1 x SMYS, SMYS + 69 MPa, or 1/2 (SMYS + SMTS). For pipelines operating at high temperature, the SMYS and SMTS should be derated. For submerged pipelines, or to calculate the allowable pressure at a reference elevation, use the level 1 calculator including elevation. The allowable local pressure is calculated including external pressure (use the external pressure = 0 for dry pipelines). The allowable reference pressure is calculated from the local allowable pressure, and the relative elevation. AGA NG-18 is suitable for crack defects. For blunt defects including corrosion, mechanical damage and grinding repairs etc the ASME B31G or RSTRENG calculators are recommended. Reference : AGA Pipeline Research Committee NG-18 Report 204 Ductile Fracture Properties of Selected Linepipe Steels Change Module : Related Modules : |
CALCULATOR MODULE : AGA NG18 Level 2 Defect Assessment ±
Calculate AGA NG-18 level 2 crack defect assessment. The level 2 assessment calculates the allowable pressure from the defect "river bottom" profile using the effective area method (also known as the RSTRENG method). Pressure derating is required if the allowable pressure is less than the maximum operating pressure. The flow stress can be calculated as either 1.1 x SMYS, SMYS + 69 MPa, or 1/2 (SMYS + SMTS). For pipelines operating at high temperature, the SMYS and SMTS should be derated. For submerged pipelines, or to calculate the allowable pressure at a reference elevation, use the level 1 and level 2 calculators including elevation. The allowable local pressure is calculated including external pressure (use the external pressure = 0 for dry pipelines). The allowable reference pressure is calculated from the local allowable pressure, and the relative elevation. AGA NG-18 is suitable for crack defects. For blunt defects including corrosion, mechanical damage and grinding repairs etc the ASME B31G or RSTRENG calculators are recommended. Reference : AGA Pipeline Research Committee NG-18 Report 204 Ductile Fracture Properties of Selected Linepipe Steels Change Module : Related Modules : |
CALCULATOR MODULE : PRCI PR 3805 RSTRENG ±
Calculate PR-3-805 RSTRENG piping level 0 corrosion defect assessment for blunt defects (corrosion defects or other defects). The level 0 assessment is useful as a screening check. The allowable defect length is calculated from the maximum defect depth. The calculation is taken from ASME B31G 1999 (original ASME B31G). The level 0 check is suitable for blunt defects of all types, including corrosion, mechanical damage and grinding repairs etc. For crack type defects the NG-18 crack defect calculators are recommended. The RSTRENG method (effective area method) can also be used for blunt type defects. The temperature derating calculation is from ASME B31.8. Material specific test data should be used if it is available. Defects failing the level 0 check should be checked with a level 1 or level 2 assessment (see module links below). Use the level 1 assessment for simple defects from defect length and depth using the 0.85 RSTRENG equation. Use the level 2 assessment for complex defects from the defect river bottom profile using the RSTRENG method or effective area method. Reference : PRCI, Pipeline Research Committee Project, PR-3-805, “A Modified Criterion for Evaluating the Remaining Strength of Corroded Pipe,” December 22, 1989, PRCI PR-3-805 (R-STRENG) With RSTRENG Disk. Change Module : |
CALCULATOR MODULE : PRCI PR 3805 RSTRENG Level 1 0.85 RSTRENG ±
Calculate the PR-3-805 RSTRENG level 1 (0.85 RSTRENG) corrosion defect assessment for blunt defects. Use the level 1 caculators to calculate the allowable pressure from the maximum defect depth and the defect length using the 0.85 RSTRENG method. Pressure derating is required if the allowable pressure is less than the maximum operating pressure. The measured pipe diameter and wall thickness should be used in the calculations. PR-3-805 RSTRENG is suitable for blunt corrosion defects and mechanical damage defects (eg from grinding). ASME B31G is also suitable for blunt defects. AGA NG-18 is suitable for crack type defects. The calculators which include elevation can be used to include external pressure, and to calculate the allowable pressure at a reference elevation (for Example to calculate the allowable pressure at the pressure control location). Set the external pressure = 0 for dry pipelines. For pipelines operating above 120 C the yield stress and ultimate stress should be derated. Material test data should be used if it is available. Flow stress can be calculated using either the RSTRENG equation, or the ASME equation. Reference : PRCI, Pipeline Research Committee Project, PR-3-805, “A Modified Criterion for Evaluating the Remaining Strength of Corroded Pipe,” December 22, 1989, PRCI PR-3-805 (R-STRENG) With RSTRENG Disk. Change Module : Related Modules : |
CALCULATOR MODULE : PRCI PR 3805 RSTRENG Level 2 RSTRENG Method ±
Calculate the PR-3-805 RSTRENG level 2 (RSTRENG Method) corrosion defect assessment for blunt defects. Use the level 2 calculators to calculate the allowable pressure from the defect "river bottom" profile using the effective area method (also known as the RSTRENG method). Pressure derating is required if the allowable pressure is less than the maximum operating pressure. The measured pipe diameter and wall thickness should be used in the calculations. The calculators which include elevation can be used to include external pressure, and to calculate the allowable pressure at a reference elevation (for Example to calculate the allowable pressure at the pressure control location). Set the external pressure = 0 for dry pipelines. For pipelines operating above 120 C the yield stress and ultimate stress should be derated . Use the stress derating calculator if test data is not available. Test data should be used if it is available. PR-3-805 RSTRENG is suitable for blunt corrosion defects and mechanical damage defects (eg from grinding). ASME B31G is also suitable for blunt defects. AGA NG-18 is suitable for crack type defects. Flow stress can be calculated using either the RSTRENG equation, or the ASME equation. Reference : PRCI, Pipeline Research Committee Project, PR-3-805, “A Modified Criterion for Evaluating the Remaining Strength of Corroded Pipe,” December 22, 1989, PRCI PR-3-805 (R-STRENG) With RSTRENG Disk. Change Module : Related Modules : |
CALCULATOR MODULE : Pipeline Dent ±
Calculate pipe dent depth, dent energy and dent force using either the Ellinas and Walker equation, the Wierzbicki and Suh equation, or the general equation (John Brown). References : Elìinas, C. P., and Walker, A. C, Damage on Offshore Tubular Bracing Members, IABSE Colloquium—Copenhagen 1983, vol 42, pp. 253-261.
Wierzbicki, T. and Suh, M-S. Denting Analysis of Tubes Under Combined Loading. Report MITSG 86-5, Sea Grant Program, Massachusettes Institute Of technology, (1986).
John Brown Engineering And Construction. |
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) Change Module : Related Modules : |
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) Change Module : |
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) Change Module : |
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) Change Module : |
CALCULATOR MODULE : DNVGL RP F101 Maximum Defect Depth ±
Calculate DNVGL RP F101 maximum allowable measured defect depth from measurement accuracy and confidence level. Reference : DNVGL-RP-F101 : Corroded Pipelines (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : AS 2885.1 Pipeline Fracture Toughness ±
Calculate AS 2885.1 pipeline critical defect length and fracture toughness. The critical defect length is calculated from the flow stress and the maximum hoop stress using the Folias factor Mt. The initiation crack length is assumed to be equal to 0.8 - 0.9 of the critical defect length. The required initiation fracture toughness can then be calculated from the initiation defect length. The required CVN is then calculated from the fracture toughness. Reference : Australian Standard AS 2885.1 : Pipelines - Gas And Liquid Petroleum Part 1 : Design And Construction (2015) Change Module : |
CALCULATOR MODULE : DNVGL RP C203 Pipeline Fatigue Stress ±
Calculate DNVGL-RP-C203 pipeline allowable number of fatigue cycles. The stress amplitude is calculated between load state A, and load state B. Use the mean stress factor for base material and welds with insignificant residual stress. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Tubular Fatigue Stress ±
Calculate DNVGL-RP-C203 allowable number of fatigue cycles for round tubulars. The stress amplitude is calculated between load state A, and load state B. Use the mean stress factor for base material and welds with insignificant residual stress. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
DATA MODULE : ASME B31 Pipe And Flange Dimension ( Open In Popup Workbook ) ±
ASME B31.8 gas pipe and flange data values: pipe dimensions, flange dimensions, cover requirements, cold bends, burn through and location class. Reference : ANSI/ASME B31.8 : Gas Transmission And Distribution Piping Systems Related Modules : |