What is the required thickness of a dished seamless head attached to a boiler with a shell diameter of 1200 mm under a pressure of 1930 kPa?

To determine the required thickness of a dished seamless head for a boiler, one must utilize the formulas established in the ASME Boiler and Pressure Vessel Code (BPVC), which provides guidelines for the design of pressure vessels.

The thickness of a dished head can be calculated using the following formula:

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

Where:

• ( t ) = required thickness

• ( P ) = internal pressure

• ( D ) = diameter of the shell

• ( S ) = allowable stress of the material

• ( C ) = corrosion allowance (if applicable)

Given a shell diameter of 1200 mm (or 1.2 m) and a pressure of 1930 kPa (or 1930 x 10^3 Pa), you must apply the appropriate material strength for the specific construction of the dished head.

To arrive at the final thickness, you need to calculate the product of pressure and diameter, divide it by twice the allowable stress of the material (typically given in MPa), and factor in any necessary corrosion allowance.

By substituting in the values specific to the problem, one would find that