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CALCULATOR MODULE : ASME B31.3 Process Piping Basic Allowable Stress ±
Calculate ASME B31.3 process piping allowable stress (S), yield stress (SYT) and tensile stress (SUT) from temperature for low pressure piping (ASME B31.3 Table A-1) and high pressure piping (ASME B31.3 Table K-1). Stress values are interpolated from the US data tables (US units govern). For temperatures below the data range, the stress value is constant (fracture toughness should also be considered for low temperature operation). For temperatures above the data range the stress values can either be constant value from the end point, constant slope from the end point, or zero from the end point. Engineering judgement is required to use extrapolated values above the data range. 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 K-1). Use the Result Table option to display a table of allowable stress versus material type. 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 : Related Modules : |
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 B31.3 Process Piping Design Factor ±
Calculate ASME B31.3 process piping design factors (Y factor and W factor). The Y factor is calculated from diameter for thick wall pipe (D/t < 6), or from temperature for thin wall pipe. The weld factor (W) is only relevant for design temperatures in the creep range. For design temperatures below the creep onset temperature W = 1. The weld factor does not apply for seamless pipe (W = 1). Reference : ANSI/ASME B31.3 : Process Piping (2018) Change Module : Related Modules : |
CALCULATOR MODULE : ASME B31.3 Process Piping Minimum Temperature For Impact Testing ±
Calculate ASME B31.3 process piping minimum temperature for impact testing from wall thickness and material type. For carbon steel materials with a minimum temperature letter designation, the minimum temperature for testing can be calculated according to table 323.2.2A (curves A, B, C and D). If the maximum stress is less than the design stress, the impact testing temperature can be reduced according to figure 323.2.2B using the stress ratio. The stress ratio is the maximum of hoop stress over design stress, combined stress over design stress, or operating pressure over pressure rating for pressure rated components. The reduction in impact testing temperature from stress ratio is valid for minimum temperatures listed in table A-1, and for minimum temnperatures calculated from a letter designation (curves A, B, C or D). Use the workbook ASME B31.3 data tables to look up minimum temperature and letter designation data. Reference : ANSI/ASME B31.3 : Process Piping (2018) Change Module : Related Modules : |
CALCULATOR MODULE : ASME B31.8 Gas Pipeline Allowable Stress ±
Calculate ASME B31.8 gas pipeline allowable stress from temperature for onshore and offshore pipelines. Select the appropriate stress table (API, ASM, DNV etc), and material. Use the Result Table option to display the results for the selected stress table (click the Result Table button on the plot bar, then click the make table button). For metal pipeline the pressure design thickness equals the nominal wall thickness minus the corrosion allowance. Fabrication tolerance is ignored. Reference : ANSI/ASME B31.8 : Gas Transmission And Distribution Piping Systems (2018) Change Module : |
CALCULATOR MODULE : ASME B31.8 Gas Pipeline Temperature Derating ±
Calculate ASME B31.8 gas pipeline temperature derating for onshore and offshore steel pipelines (carbon steel and low alloy steel?). The temperature derating factor is not valid for nickel alloy or stainless steel pipelines. Reference : ANSI/ASME B31.8 : Gas Transmission And Distribution Piping Systems (2018) Change Module : |
CALCULATOR MODULE : ASME B31G Flow Stress ±
Calculate ASME B31G flow stress from SMYS and SMTS. Flow stress can be calculated by three methods - Sf = 1.1 x SMYS (Plain Carbon Steel T < 120 C and Sf < SMTS)
- Sf = SMYS + 69 MPA (SMYS ≤ 483 MPa, T < 120 C and Sf < SMTS)
- Sf = (SYT + SUT) / 2 (SMYS ≤ 551 MPa)
SYT and SUT are the temperature derated yield stress and tensile stress for temperatures above 120 C. The derating factors are valid up to 232 C (450 F). Material specific test data should be used if it is available. Reference : ANSI/ASME B31G Manual For Determining The Remaining Strength Of Corroded Pipelines (2012) Change Module : Related Modules : |
CALCULATOR MODULE : ASME B31.1 Power Piping Allowable Stress ±
Calculate ASME B31.1 power piping basic allowable stress (S), allowable stress (SE), design stress (SEW), tensile stress (SUT), and yield stress (SYT) from the design temperature (US units). The allowable stress (SE) is calculated from tables A-1 to A-10. The calculated stress values are constant for temperatures below the data range. For temperatures above the data range, the stress values can be calculated as either a constant value from the highest data point, constant slope from the highest data point, or set to zero. Stress values for temperatures above the data range should be ued carefully (engineering judgement is required). The yield stress and tensile stress are assumed to be proportional to the allowable stress (approximate only). Actual yield stress and tensile stress temperature data should be used if it is available. The weld factor is only relevant for temperatures in the creep range. The weld factor W = 1 for temperatures below the creep onset temperature, or for seamless pipe. 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 allowable stress versus material type. The calculations use US 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 : Related Modules : |
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 : ASME B31.1 Power Piping Design Factor ±
Calculate ASME B31.1 power piping design factors (Weld factor W, Y factor and thinning allowance B). The Y factor is calculated from diameter for thick wall pipe (D/t < 6), or from temperature for thin wall pipe. The weld factor (W) is only relevant for design temperatures in the creep range. For design temperatures below the creep onset temperature W = 1. The weld factor does not apply for seamless pipe (W = 1). The thinning allowance (B) is an approximate estimate of the thinning on the outside radius due to bending (ASME B31.3 table 102.4.5). A power law curve has been fitted to the data values in the table. 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 : ASME B31.5 Refrigeration Piping Allowable Stress ±
Calculate ASME B31.5 refrigeration piping allowable stress (S), yield stress (SYT) and tensile stress (SUT) from the design temperature. Stress values are calculated from temperature using Table 502.3.1 (US values). Change units on the setup page. For temperatures below the data range, the stress value is constant (fracture toughness should also be considered for low temperature operation). For temperatures above the data range the stress values can either be constant value for the end point, constant slope from the end point, or zero from the end point. Engineering judgement is required to use extrapolated values above the data range. 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 allowable stress versus material type. Refer to the help pages for notes on the data tables. Use the workbook ASME B31.5 data tables to look up allowable stress data. Reference : ANSI/ASME B31.5 : Refrigeration Piping And Heat Transfer Components (2013) Change Module : Related Modules : |
CALCULATOR MODULE : ASME B31.5 Refrigeration Piping Minimum Temperature For Impact Testing ±
Calculate ASME B31.5 refrigeration piping minimum temperature for impact testing from wall thickness and material type. For carbon steel materials with a minimum temperature letter designation, the minimum temperature for testing can be calculated according to table 523.2.2 (curves A, B and C). If the maximum stress is less than the design stress, the impact testing temperature can be reduced according to figure 523.2.2 using the stress ratio (the ratio of design tensile streess over allowable stress). Use the hoop stress calculator to calculate the hoop tensile stress. Use the flexibility calculators to calculate longitudinal tensile stress. Use the workbook ASME B31.5 data tables to look up minimum temperature and letter designation data. Reference : ANSI/ASME B31.5 : Refrigeration Piping And Heat Transfer Components (2013) Change Module : Related Modules : |
CALCULATOR MODULE : Pipeline Axial Load ±
Calculate pipeline global (or external) axial load, and pipe wall axial load from temperature and pressure. Fully restrained axial load is due to the difference between installation temperature and pressure, and the operating temperature and pressure, and including residual installation loads. External pressure is assumed constant. Unrestrained load is due to the pipe end cap pressure force. The axial load is calculated using the thick wall formula (API RP 1111 and DNV OS F101). For onshore and offshore pipelines the internal pressure is assumed zero during installation, and the external pressure is assumed constant for installation and operation. For piping the internal and external pressure are assumed zero during installation. The design factor should include all relevant factors (eg quality factor E and stress factor F etc). 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 : High Temperature High Pressure (HTHP) Pipeline Line Pipe Schedule ±
Calculate pipeline diameter and wall thickness schedule for high temperature high pressure (HTHP) pipelines. The pipe diameter can be calculated from either the inside diameter, or the outside diameter. Use the Result Table option to display a table of pipe cross section versus wall thickness for the selected diameter schedule. Change Module : |
CALCULATOR MODULE : Hot Pipeline Temperature Decay Curve ±
Calculate high temperature pipeline temperature decay curve from thermal properties or temperature data. The temperature is assumed to decay exponentially. The temperature decay can be defined by either a decay length, or decay time. The decay length is only valid provided that the fluid mass flow rate and heat capacity are unchanged. The decay time is valid for any flowrate provided that the fluid heat capacity is unchanged. The overall heat transfer coefficient is calculated relative to the inside diameter of the pipe. Change Module : |
CALCULATOR MODULE : Hot Pipeline End Expansion ±
Calculate high temperature pipeline end expansion and anchor points. Pipeline expansion is caused by the change in pressure and temperature from the installation conditions. The external temperature and pressure are assummed to be constant. The anchor points are the locations at both ends where the friction force is equal to the restrained axial load. Short pipelines have a virtual anchor point at the midway position. Change Module : |
CALCULATOR MODULE : Hot Pipeline Hobbs Lateral And Upheaval Buckling ±
Calculate high temperature pipeline lateral and upheaval buckling inititation temperature from initial out of straighness using the Hobbs method. The Hobbs method is suitable for pipelines lying on the seabed. It should not be used for buried pipelines. The buckle initiation temperature can be calculated for lateral buckling modes 1 to 4, and upheaval buckling mode. The post buckling mode is indicative only, and is not valid outside the elastic range. Change Module : |
CALCULATOR MODULE : Hot Pipeline Upheaval Buckling ±
Calculate high temperature pipeline upheaval buckling using either the Hobbs method, the Pipeng method, or the LRSTAR method. The Hobbs method can be used for used for pipelines lying on the seabed. The LRSTAR and Pipeng methods are suitable for buried pipelines, and have been developed using the results from finite element analysis (FEA). The LRSTAR method uses a cubic spline fit for the dimensionless Richards length number and Richards weight number. The Pipeng method uses a simple mathematical relationship between the Calladine Length number and the Calladine load number based on beam theory. The Hobbs method calculates the initiation temperature from the global axial load, the load outside the slip zone, and hence accounts for the expansion of the pipe prior to buckling. The Pipeng method and LRSTAR method calculate the initiation temperature from the axial load in the buckle, and do not account for the expansion of the pipe prior to buckling. The Pipeng method and LRSTAR method are therefore slightly conservative. In addition, the LRSTAR method includes a built in design factor. The LRSTAR method is therefore more conservative than the Pipeng method. Change Module : |
CALCULATOR MODULE : Hot Pipeline Lateral Buckling ±
Calculate high temperature pipeline lateral buckling initiation temperature from the initial out of straightness using the Hobbs method. The Hobbs method can be used to calculate the lateral buckling initiation temperature for lateral buckling modes 1 to 4. The Hobbs method should be used for unburied pipelines only. Change Module : |
CALCULATOR MODULE : Hot Pipeline Upheaval Buckling Trigger ±
Calculate high temperature pipeline upheaval buckling trigger height using Hobbs method. Upheaval buckling triggers are used to initiate controlled buckling of high temperature high pressure pipelines. The trigger height should be designed so that the upheaval buckling initiation temperature is lower than the lateral buckling initiation temperature for all four lateral buckling modes. The triggers should be spaced according to the buckle initiation slip length. Use the Result Plot option to display the buckle initiation temperature versus either lateral out of straightness or trigger height, and use the goal seek option to calculate the required trigger height. Change Module : |
CALCULATOR MODULE : Hot Pipeline Walking ±
Calculate high temperature pipeline walking due to temperature and pressure cycling using the Pipeng simplified method. The pipe walking length is calculated from the axial movement of the pipe at the down stream anchor point during startup and shutdown cycling using a simple linear friction model. Refer to the pipe walking reference file (pdf) for more details. Change Module : |
CALCULATOR MODULE : Hot Pipeline Soil Weight ±
Calculate soil specific weight, soil solid density, soil loose density, soil volume fraction and soil void ratio for dry and submerged soil. The void ratio is the ratio of void volume over the soil volume. The soil volume fraction is the ratio of the soil volume over the total volume (soil volume plus void volume). Change Module : |
CALCULATOR MODULE : Hot Pipeline Soil Friction ±
Calculate high temperature pipeline soil friction force, friction factos, friction angle and earth pressure coefficient. Change Module : |
CALCULATOR MODULE : Hot Pipeline Uplift Resistance ±
Calculate high temperature pipeline soil uplift resistance from pipe weight and soil height. Soil resistance can be calculated for cohesive and non cohesive soils. Change Module : |
CALCULATOR MODULE : Hot Pipeline Prop ±
Calculate high temperature pipeline prop length and inflection points from prop height. The prop length is calculated using simple beam theory for slender elastic beams. Shear deformation is ignored. The pipe curvature is zero at the inflection points. Change Module : |
CALCULATOR MODULE : AGA NG18 Flow Stress ±
Calculate AGA NG-18 flow stress from SMYS and SMTS. Flow stress can be calculated by three methods - Sf = 1.1 x SMYS (Plain Carbon Steel T < 120 C and Sf < SMTS)
- Sf = SMYS + 69 MPA (SMYS ≤ 483 MPa, T < 120 C and Sf < SMTS)
- Sf = (SYT + SUT) / 2 (SMYS ≤ 551 MPa)
SYT and SUT are the temperature derated yield stress and tensile stress for temperatures above 120 C. The derating factors are valid up to 232 C (450 F). Material specific stress data should be used if it is available. 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 Flow Stress ±
Calculate PR-3-805 RSTRENG flow stress from SMYS and SMTS. Flow stress can be calculated by three methods - Sf = 1.1 x SMYS (Plain Carbon Steel T < 120 C and Sf < SMTS) original ASME B31G
- Sf = SMYS + 69 MPA (SMYS ≤ 483 MPa, T < 120 C and Sf < SMTS) RSTRENG
- Sf = (SYT + SUT) / 2 (SMYS ≤ 551 MPa) modified ASME B31G
SYT and SUT are the temperature derated yield stress and tensile stress for temperatures above 120 C. The derating factors are valid up to 232 C (450 F). Material specific stress data should be used if it is available. 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 : API RP 1111 Pipeline Temperature Derating ±
Calculate API RP 1111 limit state pipeline temperature derating for offshore steel pipelines (carbon steel and low alloy steel). The temperature derating factor is taken from ASME B31.8 section 841.1 Table 841.1.8-1. The derating factor is not valid for nickel alloy or stainless steel pipelines. Reference : API RP 1111 : Design, Construction, Operation, and Maintenance of Offshore Hydrocarbon Pipelines (Limit State Design) (2011) Change Module : |
CALCULATOR MODULE : ASME B31.4 Liquid Pipeline Flexibility And Stress Factor ±
Calculate ASME B31.4 flexibility - stress intensity factors
- allowable cyclic stress
- stress range factor
- longitudinal stress
- expansion stress
Refer to the figures for symbols. Reference : ANSI/ASME B31.4 : Liquid Pipelines Change Module : Related Modules : |
CALCULATOR MODULE : ASME B31.8 Gas Pipeline Flexibility And Stress Factor ±
Calculate ASME B31.8 flexibility - stress intensity factors
- allowable cyclic stress
- stress range factor
- longitudinal stress
- flexibility stress
Refer to the figures for symbols. Reference : ANSI/ASME B31.8 : Gas Pipelines Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP F101 Temperature Derating ±
Calculate DNVGL RP F101 yield stress and ultimate stress temperature derating from temperature. The derating stress is calculated in accordance with DNV OS F101 submarine pipeline systems. The derating stress is valid for temperatures less than or equal to 200 degrees C. Material tests should be performed for operating temperatures above 200 C. Reference : DNVGL-RP-F101 : Corroded Pipelines (Download from the DNVGL website) Change Module : |
CALCULATOR MODULE : Bolt Design Stress And Design Load From Temperature ±
Calculate bolt design load and design stress from temperature and bolt diameter. The design stress calculations are taken from ASME B31.31.3 process piping, and ASME B31.1 power piping. The bolt tensile area is calculated for either ANSI threads or ISO threads. Bolt size can be calculated for either UNC, UNF, BSW or ISO threads. Use the Result Plot option to display a plot of design 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 bolt design load versus either bolt size or bolt material. Change Module : Related Modules : |
CALCULATOR MODULE : Pipeline Flow Rate ±
Calculate fluid flow rate for single phase liquids, single phase gases, and two phase fluids. Fluid flow rate can be measured by volume flow rate, mass flow rate, mole flow rate, and velocity. Related Modules : |
CALCULATOR MODULE : DNVGL RP F115 Pipeline Temperature Correction ±
Calculate DNVGL RP-F115 change in test pressure due to changes in pipeline temperature. Reference : DNVGL-RP-F115 Pre-commissioning of Submarine Pipelines (Download from the DNVGL website) Change Module : Related Modules : |
DATA MODULE : Material Thermal Expansion Coefficient ( Open In Popup Workbook ) ±
Material thermal expansion coefficient data for materials due to changes in temperature. Related Modules : |
DATA MODULE : Material Heat Transfer And Thermal Capacity ( Open In Popup Workbook ) ±
Material thermal heat transfer coefficients, and heat capacity. Related Modules : |
DATA MODULE : ASME ANSI API Design Factor ( Open In Popup Workbook ) ±
ASME, ANSI and API design factors for use with the ASME, ANSI and API codes. Related Modules : |
DATA MODULE : ASME B31.1 Power Piping Allowable Stress ( Open In Popup Workbook ) ±
Allowable stress data for ASME B31.1 power piping (Table A US values). Use the ASME B31.1 allowable stress calculators (see link below) to interpolate the US data values, or to convert the US data values to SI units. Reference : ANSI/ASME B31.1 : Power Piping Change Module : Related Modules : |
DATA MODULE : ASME B31.1 Power Piping Plastic Component ( Open In Popup Workbook ) ±
Data tables for ASME B31.1 power piping plastic components. Design stress and temperature limits for thermoplastic piping (table N-102.2.1(a)-1), laminated reinforced thermosetting resin piping (table N-102.2.1(a)-2), and machine-made reinforced thermosetting resin pipe (table N-102.2.1(a)-3). Reference : ANSI/ASME B31.1 : Power Piping Change Module : Related Modules : |
DATA MODULE : ASME B31.3 Process Piping Plastic Component ( Open In Popup Workbook ) ±
Allowable stress, elastic modulus, and thermal expansion coefficient data for ASME B31.3 plastic piping (Table C and B US and SI values). Reference : ANSI/ASME B31.3 : Process Piping (2018) Change Module : Related Modules : |
DATA MODULE : ASME B31.3 Process Piping Minimum Temperature For Impact Testing ( Open In Popup Workbook ) ±
Minimum temperature for impact testing for ASME B31.3 process piping. Reference : ANSI/ASME B31.3 : Process Piping (2018) Change Module : Related Modules : |
DATA MODULE : ASME B31.5 Refrigeration Piping Minimum Temperature For Impact Testing ( Open In Popup Workbook ) ±
Refrigeration piping impact testing minimum temperature data for ASME B31.5. Reference : ANSI/ASME B31.5 : Refrigeration Piping And Heat Transfer Components Change Module : Related Modules : |
DATA MODULE : ASME B16.5 Pipe Flange Pressure Rating ( Open In Popup Workbook ) ±
ASME B16.5 pipe flange rated pressure versus temperature for class 150, 300, 400, 600, 900, 1500 and 2500 (Table 2 SI values). Use the ASME B16.5 rated pressure calculators (see link below) to interpolate the data values, or to convert the data values to other units. Reference : ANSI/ASME B16.5 : Pipe Flanges And Flanged Fittings (2017) Change Module : Related Modules : |