1. What is the Pressure Calculator Seto?

Definition: This calculator computes internal pressure in a pipe using Barlow's formula, which is fundamental in pipe and pressure vessel design.

Purpose: It helps engineers and technicians determine the maximum allowable working pressure for cylindrical pipes and vessels.

2. How Does the Calculator Work?

The calculator uses Barlow's formula:

Where:

• \( P \) — Internal pressure (Pascals)
• \( S \) — Hoop stress (Pascals)
• \( t \) — Wall thickness (meters)
• \( D \) — Outside diameter (meters)

Explanation: The formula calculates the internal pressure that a pipe can withstand based on its material strength and dimensions.

3. Importance of Pressure Calculation

Details: Accurate pressure calculation is critical for ensuring structural integrity, safety, and regulatory compliance in piping systems.

4. Using the Calculator

Tips: Enter the material stress (typically yield strength with safety factor), wall thickness, and outside diameter. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Barlow's formula used for?
A: It's used to calculate the internal pressure that a pipe can withstand before yielding, based on its material properties and dimensions.

Q2: What units should I use?
A: Consistent SI units are recommended (Pa for stress/pressure, meters for dimensions).

Q3: Does this account for safety factors?
A: No, the stress value (S) should already include appropriate safety factors for your application.

Q4: Is this formula for thin-walled or thick-walled pipes?
A: Barlow's formula is most accurate for thin-walled pipes (where D/t > 20).

Q5: What about temperature effects?
A: Temperature effects must be considered separately in the material stress value (S).