Requirements to Move Unpressured Pipe

This application is related to maximum movement (deflection) at the end of pipe with no pressure. The greater the deflection requires a larger distance of exposed pipe to minimize the strain on the pipe.

PTLB Design & Stress Analysis_2.12 Intro Image.png
𝑆𝑚𝑎𝑥 − Maximum Stress Allowed
𝑆𝑀𝑌𝑆 − Specific Minimum Yield Strength


PTLB Design & Stress Analysis_2.12 Intro Image 2 Revised.png
𝑆𝑀 − Section Modulus
𝐷 − Nominal Outside Diameter(in)
𝑡 − Nomnal Wall Thickness(in)

PTLB Design & Stress Analysis_2.12 Intro Image 3.png
𝐼 − Moment of Inertial
𝐷 − Nominal Outside Diameter(in)
𝑡 − Nomnal Wall Thickness(in)


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𝐿𝑑 − Maximum Deflection at Pipe End(in)
𝑌 − Young′s Modulus of Elasticity(psia)


PTLB Design & Stress Analysis_2.12 Intro Image 5.png
𝐿𝑝 − Total Exposed Pipe Requirement(ft)


PTLB Design & Stress Analysis_2.12 Intro Image 6.png
𝐿𝑚𝑎𝑥 − Maximum Load at the Pipe End(lbs)

PTLB Design & Stress Analysis_2.12 Intro Image 7.png

Input Parameters
To create a new case, click the “Add Case” button
Select the Requirements to Move Unpressured Pipe application from the Steel Pipe – Design and Stress Analysis module.
Enter Case Name, Location, Date and any necessary notes.
Fill out all required fields.
Make sure the values you are inputting are in the correct units.
Click the CALCULATE button.
Nominal Pipe Size(in)
Wall Thickness(in)
Maximum Deflection at the Pipe End(in),
Percentage SMYS (%)
Pipe grade (if pipe grade is unknown use Grade A 24000)
PLTB Liquid_DesignStress_2.12 Input Rev_092420.png

Outputs/Reports
View the results.
If an input parameter needs to be edited be sure to hit the CALCULATE button after the change.
To SAVE, fill out all required case details then click the SAVE button.
To rename an existing file, click the SAVE As button. Provide all case info then click SAVE.
To generate a REPORT, click the REPORT button.
The user may export the Case/Report by clicking the Export to Excel/PowerPoint icon.
To delete a case, click the DELETE icon near the top of the widget.
Maximum Stress Allowed(psi)
Total Exposed Pipe Required(ft)
Maximum Load at the Pipe Ends(lbs.)
Section Modulus
Moment of Inertia
Moment(lb./ft).
PLTB Liquid_DesignStress_2.12 Output Rev_092420.png

Related Links
Pipeline Design & Stress Analysis