An indispensable tool designed to help engineers and project managers determine the maximum internal pressure that steel pipes can safely withstand. This calculator uses Barlow’s Formula, a trusted method in the industry, to ensure accurate and reliable results.

How to Use the Calculator:

  • Enter Allowable Stress: Input the allowable tensile or yield stress of the pipe material in pounds per square inch (PSI).
  • Input Wall Thickness: Provide the wall thickness of the pipe in inches.
  • Input Outside Diameter: Enter the outside diameter of the pipe in inches.
  • Calculate Pressure Rating: Once the values are entered, the calculator will compute the pipe's pressure rating in pounds per square inch gauge (psig).

Understanding the Calculation:

Barlow’s Formula is expressed as: 𝑃 = 2×𝑠×𝑡×𝐷



  • P is the pressure rating in psig.
  • s is the allowable stress in psi.
  • t is the wall thickness in inches.
  • D is the outside diameter in inches.

This formula ensures that the calculated pressure rating reflects the pipe's capacity to handle internal pressures based on its material strength, wall thickness, and diameter.

Why This Calculator is Essential:

  • Project Safety: It helps ensure that the chosen pipe specifications meet safety standards under expected operational pressures.
  • Design Efficiency: It aids in selecting the appropriate pipe dimensions and materials for specific applications, optimizing both cost and performance.
  • Regulatory Compliance: It supports compliance with industry standards and engineering practices.

Calculate with Confidence:
Use our Pipe Pressure Rating Calculator to validate your pipe specifications and make informed decisions about material selection and design parameters. Our tool is designed to provide quick and accurate results, streamlining your project planning process.

Ready to optimize your project’s piping specifications?

Start using our calculator now to enhance your design's safety and efficiency. For more detailed assistance or inquiries about our steel pipe products, please contact our expert team.

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Why Use Our Calculators?

Federal Steel Supply’s calculators are engineered to provide:

  • Accuracy: Ensure your calculations are precise and compliant with industry standards.
  • Efficiency: Save time with quick calculations, allowing you to focus on other critical aspects of your project.
  • Expertise: Benefit from tools developed with the insights of industry-leading experts in steel fabrication and design.

Each calculator page includes detailed instructions, examples, and FAQs to guide you through the process and help you utilize our tools effectively.

Enhance Your Project Planning with Federal Steel Supply:

By integrating our calculators into your project planning, you enhance not only the precision but also the reliability and safety of your constructions. Whether you are calculating pipe pressure ratings or converting temperature units for high-stakes engineering projects, our tools are designed to support your needs.

Ready to get started?

Visit our calculator tools now and take the first step towards streamlined project management and impeccable design execution. For more information or to discuss your project needs, contact our experts at Federal Steel Supply today.

Optimize your steel project calculations with Federal Steel Supply—where precision meets performance.