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Plate Thickness Required to Resist Internal Pressure Calculator

Plate Thickness Formula:

\[ pt = \frac{P_i \times r}{\sigma_{tp} \times \eta} \]

Pa
mm
Pa
%
%

1. What is Plate Thickness Required to Resist Internal Pressure?

Definition: This calculator determines the minimum plate thickness needed for a pipe to withstand internal pressure without failing.

Purpose: It helps engineers design pipes and pressure vessels that can safely contain fluids under pressure.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ pt = \frac{P_i \times r}{\sigma_{tp} \times \eta} \]

Where:

  • \( pt \) — Plate thickness (mm)
  • \( P_i \) — Internal pressure (Pa)
  • \( r \) — Pipe radius (mm)
  • \( \sigma_{tp} \) — Permissible tensile stress (Pa)
  • \( \eta \) — Joint efficiency (%)

Explanation: The formula calculates the minimum thickness required to prevent failure due to hoop stress.

3. Importance of Plate Thickness Calculation

Details: Proper thickness calculation ensures structural integrity, prevents leaks or ruptures, and meets safety standards.

4. Using the Calculator

Tips: Enter internal pressure, pipe radius, permissible stress, joint efficiency (typically 0.7-0.9), and manufacturing tolerance (±5%).

5. Frequently Asked Questions (FAQ)

Q1: What is joint efficiency?
A: A factor (0-1) accounting for weld quality, with 1 being perfect and lower values for less efficient joints.

Q2: Why include manufacturing tolerance?
A: Accounts for variations in actual thickness during manufacturing (typically ±5%).

Q3: What affects permissible tensile stress?
A: Material properties, temperature, and safety factors determine this value.

Q4: Is this formula valid for all materials?
A: It works for ductile materials; brittle materials require different approaches.

Q5: How does radius affect thickness?
A: Larger radius pipes require greater thickness to withstand the same pressure.

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