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CALCULATOR MODULE : ASME B31.3 Process Piping Wall Thickness ±
Calculate ASME B31.3 process piping wall thickness from temperature for low pressure steel pipe (Table A-1), high pressure steel pipe (Table K-1), and plastic piping. Allowable stress for steel pipe is calculated from Table A-1 and Table K-1 US values (US units govern). Change units on the setup page. Stress values can be extrapolated for temperatures above the data range (care is required when using extrapolated values). The wall thickness calculations are valid for internal overpressure only. For combined internal and external pressure use the pressure difference in the calculations. Use the Data Plot option to plot the allowable stress versus temperature for the selected material. Use the Data Table option to display the data table in the popup window (Table A-1, or Table K-1). Use the Result Table option to display a table of wall thickness and allowable pressure versus material type (for the calculate wall thickness option the allowable pressure equals the design pressure. for the specified wall thickness option the wall thickness equals the specified wall thickness). Refer to the help pages for notes on the data tables. Change units on the setup page. Use the workbook ASME B31.3 data tables to look up allowable stress data. Note : The choice of high pressure versus low pressure service is at the discretion of the owner (section FK300). The ASME B16.5 Class 2500 pressure temperature rating for the material group is often used as a criteria. Reference : ANSI/ASME B31.3 : Process Piping (2018) Change Module : |
CALCULATOR MODULE : ASME B31.4 Oil And Liquid Pipeline ±
Calculate ASME B31.4 liquid 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 : ANSI/ASME B31.4 : Pipeline Transportation Systems For Liquids And Slurries (2012) Change Module : |
CALCULATOR MODULE : ASME B31.4 Liquid Pipeline Wall Thickness ±
Calculate ASME B31.4 oil and liquid pipeline wall thickness from hoop stress for onshore and offshore pipelines. Select the appropriate line pipe schedule (ASME or ISO etc) and stress table (API, ASM, DNV etc), and material. Wall thickness is calculated using Barlow's formula. For offshore pipelines either the pipe outside diameter or the mid wall diameter can be used to calculate wall thickness. The wall thickness should be checked for all elevations. Use the Result Plot option to plot required wall thickness versus elevation, or hoop stress versus elevation for user defined wall thickness. Reference : ANSI/ASME B31.4 : Pipeline Transportation Systems For Liquids And Slurries (2012) Change Module : |
CALCULATOR MODULE : ASME B31.8 Gas Pipeline Wall Thickness ±
Calculate ASME B31.8 gas pipeline wall thickness from hoop stress for onshore and offshore pipelines. Select the appropriate line pipe schedule (ASME or ISO etc), and stress table (API, ASME or DNV), or use the user defined options. Pipe pressure can either be calculated from elevation, or user defined. For metal pipeline the pressure design thickness equals the nominal wall thickness minus the corrosion allowance. Fabrication tolerance is ignored. The wall thickness should be checked for all pipeline elevations. A wall thickness should be specified which is greater than or equal to the maximum calculated wall thickness (usually by selecting the next highest schedule thickness). Use the Result Plot option to plot the calculated wall thickness versus elevation, and the hoop stress versus elevation for the specified wall thickness. Reference : ANSI/ASME B31.8 : Gas Transmission And Distribution Piping Systems (2018) Change Module : |
CALCULATOR MODULE : ASME B31.1 Power Piping Wall Thickness ±
Calculate ASME B31.1 power piping wall thickness from the design temperature. Wall thickness can be calculated from either the outside diameter (constant OD), or the inside diameter (constant ID). The allowable stress (SE) is calculated from tables A-1 to A-9. For temperatures above the data range, select either constant value, constant slope, or zero value (engineering judgement is required). The weld factor W is relevant for temperatures in the creep range. For temperatures below the creep onset temperature W = 1. The ASME Y factor can either be calculated, or user defined. For thick wall pipe (D/tm < 6) Y is calculated from the diameter. For thin wall pipe Y is calculated from the temperature. For combined internal and external pressure use the pressure difference in the calculations. Use the data plot option to plot the allowable stress versus temperature for the selected material. Use the Data Table option to display the data table in the popup window. Use the Result Table option to display a table of wall thickness and allowable pressure versus material type (for the calculate wall thickness option the allowable pressure equals the design pressure. for the specified wall thickness option the wall thickness is constant). The calculations use SI standard units. Change input and output units on the setup page. Refer to the help pages for notes on the data tables (click the resources button on the data bar). Use the workbook ASME B31.1 data tables to look up allowable stress data. Reference : ANSI/ASME B31.1 : Power Piping (2014) Change Module : |
CALCULATOR MODULE : Pipeline Wall Thickness ±
Calculate pipeline wall thickness from hoop stress using either Barlow's equation (suitable for thin wall pipes), the log equation (suitable for thick wall pipes), or Lame's equation (suitable for thick wall pipes). The design factor should include all relevant factors (eg quality factor E and stress factor F etc). The external pressure should be set to zero for dry pipelines. 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 : API RP 1111 Pipeline Wall Thickness ±
Calculate API RP 1111 limit state pipeline wall thickness from local pressure. The pipe wall thickness should be calculated for the maximum pressure difference at all points on the pipeline or pipeline section. Internal pressure is calculated from reference pressure and elevation. The internal fluid density is assumed constant. External pressure should be calculated for the minimum local water depth (lowest astronomical tide and allowance for storm surge etc). API RP 1111 should only be used for line pipe with a weld joint factor = 1.0. Note : The derated yield stress and tensile stress are used in the API RP 1111 calculations. Reference : API RP 1111 : Design, Construction, Operation, and Maintenance of Offshore Hydrocarbon Pipelines (Limit State Design) (2011) Change Module : |
CALCULATOR MODULE : AS 2885.1 Pipeline Wall Thickness ±
Calculate AS 2885.1 pipeline wall thickness from hoop stress for dry and submerged pipelines. Pipe wall thickness is governed by the maximum internal pressure for dry pipelines, or the maximum pressure difference for wet pipeline sections. For dry pipelines, the maximum internal pressure occurs at the lowest point on the pipeline or pipeline section. For wet oil and gas pipelines with internal fluid SG less than 1, the maximum pressure difference occurs at the highest submerged elevatin (eg the water surface). The required wall thickness should be calculated for each different section based on the primary and secondary location class. For each section, a wall thickness should be selected which is greater than or equal to the required wall thickness for the whole section. Use the Result Plot option to plot either the calculated wall thickness versus elevation, or the hoop stress versus elevation for the selected wall thickness. Wall thickness is calculated using Barlow's formula. The fabrication allowance is required for pipes where the fabrication tolerance exceeds the relevant specification (for example some seamless pipe). Reference : Australian Standard AS 2885.1 : Pipelines - Gas And Liquid Petroleum Part 1 : Design And Construction (2015) Change Module : |