What term describes the length of a pipe line measured along the center line of the pipe and fittings?

The term that describes the length of a pipeline measured along the center line of the pipe and fittings is known as "developed length." This measurement is critical in plumbing design and installation because it takes into account the entire path that the fluid must travel, including any bends or fittings that may affect flow and pressure.

Developed length is particularly important in hydraulic calculations and when determining the overall length of pipe needed for a system, as it ensures that all components are accounted for in their entirety. This allows for accurate assessments regarding pressure loss, flow rates, and the overall efficiency of the plumbing system.

Other terms, while related to pipe measurement, do not provide the same specific focus on the actual path taken by fluid through the system. Consequently, understanding developed length is essential for effective plumbing inspection and regulation compliance.