When selecting a pipe material, which of the following factors is least considered?

When selecting a pipe material, the color of the pipe is the least considered factor. In pipefitting, the primary considerations are the functional properties of the pipe material, such as its ability to withstand the type of fluid being transported, its resistance to corrosion, and its performance under specific temperature and pressure conditions.

While the color of the pipe may have some relevance in terms of identification in certain applications or for aesthetic purposes, it does not impact the pipe's physical or chemical properties essential for its performance. The other factors—fluid type, corrosion resistance, and temperature and pressure—are crucial for ensuring the selected pipe will function effectively and safely in its intended application. Hence, color is typically a secondary concern, making it the least influential factor in material selection.