Piping systems are prefabricated in sections called spools, which are an assembly of pipes and components. The prefabricated components of a piping system are called pipe spools. They include the pipes, flanges and fittings, and they are mounted during the fabrication before they are delivered. They are delivered pre-mounted so to make them easier to assemble using hoists, gauges, and other tools for assembly. Pipe spools connect long pipes with flanges at the tips so that they can be bolted to another pipe with matching flange. Spool pieces are delivered to the construction site for faster assembly.
The spool drawings act as a guide for the plumbers, pipe fitters and installers while they work on the site. Pipe spool drawings show single spool and are optimized for providing all information required by fabrication workshop for accurate manufacturing and spool assembly.