All of the following drawing dimensions are used to determine the overall length of run of a pipe EXCEPT?

To understand why pipe diameter is not used to determine the overall length of run of a pipe, it is important to consider how the overall length is calculated in piping design. The overall length of run typically refers to the linear measurement of the pipe from one end to the other, which is primarily influenced by connections and fittings rather than the actual size or diameter of the pipe itself.

Center-to-center, face-to-face, and center-to-face dimensions all relate to the relative positions of fittings and components in a piping system. These measurements provide critical information about how far apart parts should be positioned or the overall distance that needs to be accommodated when installing the pipe. They account for the specific geometry and layout of the piping system, making them essential for determining the total run length.

On the other hand, pipe diameter does not contribute to the overall length of run because it pertains to the size of the pipe rather than the distance it covers during installation. The length of the pipe remains the same regardless of its diameter; thus, it does not impact the calculation of how long the entire section of piping will be.