What is a spool in piping?

A spool in piping refers to a pre-fabricated section of piping that includes pipes, fittings, and valves, assembled into a single unit for ease of installation. Spools are typically fabricated off-site in a controlled environment, ensuring quality and accuracy before being transported to the installation site. They streamline the construction process by reducing on-site assembly time and minimizing labor costs. Spooling is commonly used in large industrial projects, such as refineries and power plants.