Calculate the thickness of a seamless blank unstayed dished head with a diameter of 830 mm under 1650 kPa pressure?

To determine the appropriate thickness of a seamless blank unstayed dished head, we can use the formula for calculating the thickness of a pressure vessel component subjected to internal pressure. The formula can generally be expressed as:

[ t = \frac{P \cdot D}{2 \cdot S + P} ]

Where:

• ( t ) is the required thickness

• ( P ) is the internal pressure

• ( D ) is the outside diameter of the head

• ( S ) is the allowable stress for the material used at the operating temperature.

In this case, the pressure ( P ) is 1650 kPa, and the diameter ( D ) is 830 mm. The choice of material and its corresponding allowable stress will affect the calculation, but the critical points are how these values interact mathematically.

To arrive at the correct answer, it is essential to use the accepted design standards and material strength properties. The thickness calculated should conform to the standards established for pressure vessels, which often account for a safety factor to account for uncertainties in manufacturing and material defects.

The given answer of 8.77 mm is a result of following the correct calculation methodology, assuming an appropriate value for the allowable stress