Calculate pipeline hoop stress from wall thickness and pressure 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.
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CALCULATOR : Pipeline Hoop Stress From Operating Pressure [FREE] ±
Calculate pipeline hoop stress or wall stress from operating pressure (pipe schedule diameter, wall thickness, wall thickness tolerance and allowable stress). Pipe diameter can be defined from either outside diameter, or inside diameter. Pipe wall stress can be calculated for either the nominal wall thickness, the minimum wall thickness (nominal wall thickness minus fabrication allowance), or the hoop stress wall thickness (nominal wall thickness minus fabrication allowance and corrosion allowance), and using either Barlow's thin wall equation for outside diameter, Barlow's thin wall equation for mid wall diameter, Barlow's thin wall equation with ASME Y factor, Lame's thick wall hoop stress equation, Lame's thick wall Tresca combined stress equation, or the log equation. For onshore pipelines use the no external pressure option. The allowable stress is calculated from the stress table and the design factor. Wall thickness negative tolerance can be defined by either the tolerance schedule, a fraction tolerance, or an allowance tolerance. For ASME B31.4 liquid pipelines, ASME B31.8 gas pipelines and AS 2885 (oil and gas pipelines) et al use the zero wall thickness tolerance option (the fabrication allowance is accounted for in the design factor). Tool Input- pletype : External Pressure Type
- Peu : User Defined External Pressure
- schdtype : Pipe Schedule Type
- diamtype : Pipe Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
- ttoltype : Wall Thickness Tolerance Type
- xfu : User Defined Negative Wall Thickness Fraction
- tfu : User Defined Negative Wall Thickness Allowance
- syutype : Stress Table Type
- mattype : Yield Stress Type
- SMYSu : User Defined Specified Minimum Yield Stress
- sdtype : Design Stress Type (F x SMYS)
- Fu : User Defined Design Factor
- Sdu : User Defined Design Stress
- walltype : Hoop Stress Calculation Type
- Yu : User Defined ASME Y Factor
- hooptype : Hoop Stress Wall Thickness Type
- tc : Corrosion Allowance
- Pi : Internal Pressure
Tool Output- ID : Pipe Inside Diameter
- OD : Pipe Outside Diameter
- OD/tn : Pipe Diameter Over Wall Thickness Ratio
- PΔ : Pressure Difference
- Pe : External Pressure
- SMYS : Specified Minimum Yield Stress
- Sd : Design Stress
- Sh : Hoop Stress
- Sh/Sd : Hoop Stress Over Design Stress Ratio
- tf : Fabrication Allowance
- tfx : Fabrication Fraction
- th : Hoop Stress Thickness (Pressure Containment)
- tm : Minimum Wall Thickness
- tn : Nominal Wall Thickness
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CALCULATOR : Pipeline Hoop Stress From Operating Pressure (General) [FREE] ±
Calculate pipeline hoop stress or wall stress from operating pressure from user defined diameter, wall thickness, wall thickness tolerance and allowable stress. Pipe wall stress can be calculated for either the nominal wall thickness, the minimum wall thickness (nominal wall thickness minus fabrication allowance), or the hoop stress wall thickness (nominal wall thickness minus fabrication allowance and corrosion allowance), and using either Barlow's thin wall equation for outside diameter, Barlow's thin wall equation for mid wall diameter, Barlow's thin wall equation with ASME Y factor, Lame's thick wall hoop stress equation, Lame's thick wall Tresca combined stress equation, or the log equation. For onshore pipelines, ignore external pressure. Wall thickness negative tolerance can be defined by either a fraction tolerance, or an allowance tolerance. For ASME B31.4 liquid pipelines, ASME B31.8 gas pipelines and AS 2885 (oil and gas pipelines) et al use the zero wall thickness tolerance option (the fabrication allowance is accounted for in the design factor). Tool Input- pletype : External Pressure Type
- Peu : User Defined External Pressure
- ttoltype : Wall Thickness Tolerance Type
- xfu : User Defined Negative Wall Thickness Fraction
- tfu : User Defined Negative Wall Thickness Allowance
- walltype : Hoop Stress Calculation Type
- Yu : User Defined ASME Y Factor
- hooptype : Hoop Stress Wall Thickness Type
- OD : Pipe Outside Diameter
- tn : Pipe Nominal Wall Thickness
- tc : Corrosion Allowance
- Sa : Design Stress
- Pi : Internal Pressure
Tool Output- ID : Pipe Inside Diameter
- OD/tn : Pipe Diameter Over Wall Thickness Ratio
- PΔ : Pressure Difference
- Pe : External Pressure
- Sh : Hoop Stress
- Sh/Sd : Hoop Stress Over Design Stress Ratio
- tf : Fabrication Allowance
- tfx : Fabrication Fraction
- th : Hoop Stress Thickness (Pressure Containment)
- tm : Minimum Wall Thickness
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CALCULATOR : Pipeline Yield Stress And Tensile Stress [FREE] ±
Calculate pipeline SMYS, SMTS, SMTS over SMYS ratio and SMYS over SMTS ratio from pipe stress tables. Select one of the API, ASME or DNV stress table options. The API stress values are taken from API 5L tables 6 and 7 (note the API 5L X series is superseded). The ASME stress values are taken from ASME B31.3 process piping table A-1M. The DNV stress values are taken from DNVGL ST F101 submarine pipelines, tables 7-5 and 7-11. Use the Result Table option to display the stress values for the selected stress table (click the Result Table button, and then click the make table button). Tool Input- syutype : Stress Table Type
- mattype : Material Type
- SMYSu : User Defined Specified Minimum Yield Stress
- SMTSu : User Defined Specified Minimum Tensile Stress
Tool Output- SMTS : Specified Minimum Tensile Stress
- SMTS/SMYS : Tensile Stress Over Yield Stress Ratio
- SMYS : Specified Minimum Yield Stress
- SMYS/SMTS : Yield Stress Over Tensile Stress Ratio
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CALCULATOR : Pipeline Allowable Stress From Tensile Stress [FREE] ±
Calculate pipeline SMYS, SMTS and allowable stress SE and SEF from pipe stress tables. The allowable stress is calculated by multiplying the SMYS times the quality factor E and the design factor F. The quality factor is used to account for casting quality, or longitudinal weld joint quality. The design factor is used to account for design risks (for pipelines requiring a high level of safety use a low design factor). Temperature derating is not included. Select one of the API, ASME or DNV stress table options. The API stress values are taken from API 5L tables 6 and 7 (note the API 5L X series is superseded). The ASME stress values are taken from ASME B31.3 process piping table A-1M. The DNV stress values are taken from DNVGL ST F101 submarine pipelines, tables 7-5 and 7-11. Use the Result Table option to display the stress values for the selected stress table (click the Result Table button, and then click the make table button). Tool Input- syutype : Stress Table Type
- mattype : Material Type
- SMYSu : User Defined Specified Minimum Yield Stress
- SMTSu : User Defined Specified Minimum Tensile Stress
- efactype : Quality Factor Type
- Eu : User Defined Quality Factor
- ffactype : Design Factor Type
- Fu : User Defined Design Factor
Tool Output- E : Quality Factor Or Joint Factor
- EF : Design Factor (E x F)
- F : Stress Factor
- SEF : Allowable Stress
- SMTS : Specified Minimum Tensile Stress
- SMYS : Specified Minimum Yield Stress
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CALCULATOR : Pipeline Diameter Wall Thickness And Tolerance Schedule [FREE] ±
Calculate pipeline diameter, pressure design wall thickness (nominal wall thickness minus fabrication allowance and corrosion allowance), and minimum wall thickness (nominal wall thickness minus fabrication allowance) from nominal wall thickness. Select the pipe schedule (NPS or ISO etc), pipe diameter and wall thickness, or use the user defined option. Use the Result Table option to display the pipe schedule with nominal wall thickness, minimum wall thickness and pressure design wall thickness for the selected diameter. Tool Input- schdtype : Schedule Type
- diamtype : Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
- ttoltype : Wall Thickness Fabrication Tolerance Type
- txu : User Defined Negative Wall Thickness Fraction
- tfu : User Defined Negative Wall Thickness Allowance
- c : Wall Thickness Corrosion Allowance
Tool Output- ID : Nominal Inside Diameter
- OD : Nominal Outside Diameter
- OD/tn : Diameter Over Wall Thickness Ratio
- tf : Wall Thickness Fabrication Allowance
- tm : Minimum Wall Thickness
- tn : Nominal Wall Thickness
- tp : Pressure Design Wall Thickness
- tx : Wall Thickness Fabrication Fraction
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CALCULATOR : Pipeline Diameter And Wall Thickness Schedule [FREE] ±
Calculate pipeline diameter, pressure design wall thickness (nominal wall thickness minus corrosion allowance) from nominal wall thickness. For ASME B31.4 (oil pipelines), ASME B31.8 (gas pipelines) and AS 2885 (oil and gas pipelines) the fabrication allowance is accounted for in the design factor. Fabrication allowance is not included when calculating the pressure design thickness. Select the pipe schedule (NPS or ISO etc), pipe diameter and wall thickness, or use the user defined option. Use the Result Table option to display the pipe schedule with nominal wall thickness and pressure design wall thickness for the selected diameter. Tool Input- schdtype : Line Pipe Schedule Type
- diamtype : Line Pipe Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
- c : Wall Thickness Corrosion Allowance
Tool Output- ID : Nominal Inside Diameter
- OD : Nominal Outside Diameter
- OD/tn : Diameter Over Wall Thickness Ratio
- tn : Nominal Wall Thickness
- tp : Pressure Design Wall Thickness
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CALCULATOR : Pipeline Maximum And Minimum Diameter From Tolerance [FREE] ±
Calculate pipeline maximum and minimum diameter from diameter tolerance. Select the pipe schedule type, diameter, wall thickness and diameter tolerance, or use the user defined option. Use the Result Table option to display a table of the diameter and diameter tolerance versus either wall thickness, diameter tolerance type, or diameter. Tool Input- schdtype : Schedule Type
- diamtype : Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
- dtoltype : Diameter Fabrication Tolerance Type
- dxu : User Defined Diameter Fraction
- dfu : User Defined Diameter Allowance
- ddtype : Diameter Type
Tool Output- ID : Nominal Inside Diameter
- ID* : Inside Diameter With Tolerance
- OD : Nominal Outside Diameter
- OD* : Outside Diameter With Tolerance
- OD*/tn : Diameter Over Wall Thickness Ratio
- df : Diameter Fabrication Allowance
- dx : Diameter Fabrication Fraction
- tn : Nominal Wall Thickness
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