Permissible Tensile Stress given Plate Thickness Calculator

Permissible Tensile Stress Formula:

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

Internal Pressure of Pipe:

Pipe Radius:

Plate Thickness:

Joint Efficiency:

Tolerance:

Permissible Tensile Stress (Pa):

With Tolerance (Pa):

1. What is Permissible Tensile Stress?

Definition: Permissible Tensile Stress is a stress that ensures that the stresses developed in a structure due to service loads do not exceed the elastic limit.

Purpose: It helps engineers determine the safe stress levels for materials under tension.

2. How Does the Calculator Work?

The calculator uses the formula:

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

Where:

\( \sigma_{tp} \) — Permissible Tensile Stress (Pa)
\( P_i \) — Internal Pressure of Pipe (Pa)
\( r \) — Pipe Radius (mm)
\( p_t \) — Plate Thickness (mm)
\( \eta \) — Joint Efficiency (%)

3. Importance of Calculation

Details: Proper calculation ensures structural integrity and safety of piping systems under pressure.

4. Using the Calculator

Tips: Enter all required values. Joint efficiency is typically 0.85 (85%) for welded joints. Tolerance can be adjusted ±5%.

5. Frequently Asked Questions (FAQ)

Q1: What is joint efficiency?
A: A factor that accounts for how closely a finished weld joint approximates the quality of the base material.

Q2: Why include tolerance?
A: To account for material variations and safety factors in engineering design.

Q3: What units should I use?
A: Pressure in Pascals (Pa), dimensions in millimeters (mm).

Q4: How does plate thickness affect the result?
A: Thicker plates allow higher permissible stress for given pressure.

Q5: What's a typical joint efficiency value?
A: 0.85 for welded joints, 1.0 for seamless pipes.