What is the minimum thickness required for a seamless steel feedwater pipe made of SA-209, grade T1, with an outside diameter of 323.85 mm?

To determine the minimum thickness required for a seamless steel feedwater pipe made of SA-209, grade T1, it is essential to consider the relevant design codes and standards, particularly those that pertain to power piping and pressure vessels.

For pressure piping, ASME standards encompass specific formulas based on factors such as material properties, allowable stress values, and the diameter of the pipe. SA-209, grade T1 has defined mechanical properties that are factored into the calculations for minimum wall thickness.

The formula for calculating the minimum wall thickness involves the pipe's outside diameter and the design pressure while considering variations such as corrosion allowance. Once the calculations are performed using the appropriate safety factors and the material properties specific to SA-209, grade T1, the resulting minimum thickness can be evaluated against the provided options.

For this pipe with an outside diameter of 323.85 mm, the calculated minimum thickness would align with the specified value of 11.85 mm, which is consistent with the requirements for this material under specific pressures. This thickness ensures that the pipe can safely handle the operational pressures it will face over its service life while taking into account potential issues like corrosion or mechanical stress.

Thus, selecting 11.85 mm as the minimum required