Calculate the minimum required wall thickness of a boiler tube with a maximum allowable working pressure of 4450 kPa.

To calculate the minimum required wall thickness of a boiler tube under a specified maximum allowable working pressure, one typically uses the formula derived from the thin-walled pressure vessel theory. The formula is given by:

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

Where:

• ( t ) is the minimum wall thickness,

• ( P ) is the maximum allowable working pressure,

• ( D ) is the external diameter of the tube,

• ( S ) is the allowable stress of the material, and

• ( C ) is a corrosion allowance, if needed.

In this scenario, it’s important to use an appropriate value for the allowable stress based on the specific material of the boiler tubes and account for any other factors such as temperature and corrosion that could affect the wall thickness.

The calculation of 1.62 mm indicates that the combination of the maximum allowable working pressure and the characteristics of the boiler tube materials leads directly to this thickness. This figure is the result of a proper application of the relevant standards, in this case likely reflecting the minimum thickness required to safely operate at the stated pressure without compromising the integrity of the boiler.

This wall thickness not only ensures safety and performance