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CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Line Pipe Schedule ±
Calculate DNVGL-ST-F101 subsea pipeline schedules for diameter, wall thickness, mass, weight, and stress. Use the Result Table option to display schedule tables. Refer to the links below for other options. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Wall Thickness ±
Calculate DNVGL-ST-F101 submarine pipeline wall thickness from local incidental pressure. Local incidental pressure can be calculated from the design pressure, calculated from the reference incidental pressure, or can be user defined. External pressure should be calculated for the minimum local water depth. The pipeline wall thickness must be calculated for the maximum pressure differential at all points on the pipeline or pipeline section. For submarine pipelines where the internal fluid density is less than the external fluid density, the maximum pressure differential occurs at the highest submerged location for the pipeline or pipeline section. For the platform zone the highest differential pressure occurs at the riser splash zone. Use the Result Plot option to plot the required wall thickness versus elevation. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Hydrotest Pressure ±
Calculate DNVGL-ST-F101 submarine pipeline system test pressure and mill test pressure. The system test pressure is calculated from the local incidental pressure. The required system test pressure and mill test pressure should be calculated for all points on the pipeline or pipeline section. Use the Result Plot option to plot the test pressure and hoop stress from minimum to maximum elevation. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Collapse Pressure ±
Calculate DNVGL-ST-F101 submarine pipeline external collapse pressure and propagating buckle pressure. The external pressure should be calculated for the maximum water depth. Propagating buckles are only a problem if collapse has occurred. Buckle arrestors may be required to minimse the risk of propagating buckling. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Local Buckling ±
Calculate DNVGL-ST-F101 submarine pipeline local buckling checks for combined loading. The load controlled calculators should only be used for elastic deformation (check that the equivalent stress is less than the yield stress). The displacement controlled calculators can be used for compressive elastic and plastic deformation. Elastic strains are calculated using the elastic modulus, and should not be used in the plastic range. Plastic strains should be calculated using finite element analysis (FEA). Use the allowable stress design (ASD) calculators for displacement controlled loads which include torsion. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Bend Allowable Stress Design (ASD) ±
Calculate DNVGL-ST-F101 submarine pipeline allowable stress design (ASAD) check for combined loading. The allowable stress design (ASD) check can be used for pipeline induction bends with combined loading which includes a torsion load. The allowable stress design (ASD) check is a von Mises equivalent stress check. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Axial Load ±
Calculate DNVGL-ST-F101 submarine pipeline axial load from temperature and pressure. The axial load calculations are valid in the elastic range only (check that the equivalent stress is less than the yield stress). The calculators include a combined load controlled check, displacement controlled check, allowable stress design check (ASD), and an equivalent stress check (von Mises). Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Ovality ±
Calculate DNVGL-ST-F101 submarine pipeline ovality from the out of roundness tolerance, or measured maximum and minimum diameter. Pipe ovalisation can be calculated from the initial ovality and the bending strain. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Temperature Derating ±
Calculate DNVGL-ST-F101 submarine pipeline temperature derating stress from temperature. Derating is valid for temperatures up to 200 C. Material specific test data should be used if it is available. For low temperature pipelines, fracture toughness should also be considered. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Incidental Pressure ±
Calculate DNVGL-ST-F101 submarine pipeline incidental pressure from design pressure and elevation. The reference incidental pressure (the incidental pressure at the reference elvation) is calculated from the design pressure at the reference elevation. The local incidental pressure (the incidental pressure at the local elvation) is calculated from the reference incidental pressure and the relative elevation. Use the Result Plot option to plot local pressure and reference pressure versus elevation. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Flotation ±
Calculate DNVGL-ST-F101 submarine pipeline flotation and vertical stability. Select either the empty pipe or full pipe option. For vertical stability, the pipe specific gravity should be greater than or equal to 1.1. The number of pipe internal and external layers, and the names of the layers can be changed on the setup page. The first internal layer is the line pipe. The line pipe wall thickness can either be selected from the pipe schedule, or the input value is used as the user defined value. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Tolerances ±
Calculate DNVGL-ST-F101 submarine pipeline out of roundness tolerance, diameter tolerance, and wall thickness tolerance. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Hoop Stress ±
Calculate DNVGL-ST-F101 submarine pipeline hoop stress from local incidental pressure. The local incidental pressure can either be calculated, or user defined. For temporary conditions the actual local pressure can be used (eg for system pressure test). External pressure should be calculated for the minimum local water depth (lowest astronomical tide minus storm surge). For temporary conditions storm surge can be ignored. For pressure containment use wall thickness t1. For other cases use wall thickness t2. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Carbon Equivalent ±
Calculate DNVGL-ST-F101 submarine pipeline carbon equivalent from material composition. Carbon equivalent is a useful indicator of weldability, and fracture toughness. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Dent Depth ±
Calculate DNVGL-ST-F101 maximum allowable dent depth. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Design Pressure And Burst Pressure ±
Calculate DNVGL-ST-F101 submarine pipeline maximum allowable design pressure and burst pressure from the pressure design wall thickness (nominal wall thickness minus fabrication allowance and corrosion allowance). For platform piping the allowable pressure is the maximum allowable local incidental pressure. For subsea pipelines the allowable pressure is the maximum allowable local pressure difference (local incidental pressure minus local external pressure). Use the Result Table option to display the results for the selected pipe schedule and pipe diameter. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Transition Length At Code Break ±
Calculate DNVGL-ST-F101 submarine pipeline transition length at code breaks. The minimum transition length for pipeline components at a code break is four times the elastic length. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Design Load Effect ±
Calculate DNVGL-ST-F101 submarine pipeline design load effect. The design load effect can be calculated for ultimate limit state (ULS), fatigue limit state (FLS), and accident limit state (ALS). The ULS type a check is only required for system loads. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Expansion Spool ±
Calculate DNVGL-ST-F101 submarine expansion spool local buckling and fatigue check. The expansion spool is modelled as a simple beam with fixed ends, with a uniform distributed load due to friction and a lateral displacement at one end due to expansion. Pipe cross section properties are calculated for a single pipe layer with no coatings. For pipes with internal liner or external coatings use the user defined cross section properties option. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Mass And Weight ±
Calculate DNVGL-ST-F101 subsea pipeline unit mass (mass per length), and total mass from length. The mass per joint can be calculated from the joint length. Construction quantities can be calculated from the total pipe length. Pipe unit mass (mass per length) and pipe unit weight (weight per length) can be calculated for multi layer pipelines (dry empty, dry full, wet empty and wet full pipelines). For multi layer pipelines, the first internal layer is the line pipe. Change the number of layers on the setup page. Use the Result Table option to display a table of pipe mass and weight versus schedule wall thickness for the selected diameter. Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Fluid Mass And Volume ±
Calculate DNVGL-ST-F101 subsea pipeline fluid volume and mass for two phase gas and liquid, and three phase oil, water and gas (black oil). The two phase fluid calculator can be used for single phase gas, single phase liquid, or two phase gas and liquid. The three phase black oil calculator can be used for single phase oil, single phase water, two phase oil and water, and three phase oil, water and gas. Water cut is the volume fraction of water in the liquid phase (ignoring the gas phase). Gas oil ratio (GOR) is the ratio of gas moles to liquid volume (ignoring the water phase). Gas moles are commonly measured as gas volume at standard conditions, eg SCM (Standard Conditions Meter) or SCF (Standard Conditions Feet). Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : DNVGL ST F101 Submarine Pipeline Fluid Velocity And Flowrate ±
Calculate DNVGL-ST-F101 subsea pipeline fluid velocity and flowrate for two phase gas and liquid, and three phase oil, water and gas (black oil). The two phase fluid calculator can be used for single phase gas, single phase liquid, or two phase gas and liquid. The three phase black oil calculator can be used for single phase oil, single phase water, two phase oil and water, and three phase oil, water and gas. Water cut is the volume fraction of water in the liquid phase (ignoring the gas phase). Gas oil ratio (GOR) is the ratio of gas moles to liquid volume (ignoring the water phase). Gas moles are commonly measured as gas volume at standard conditions, eg SCM (Standard Conditions Meter) or SCF (Standard Conditions Feet). Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website) Change Module : |