A spool is an assembly of pipe and associated components that can be pre-fabricated in the workshop for future installation and then shipped to site for assembling. A pipe spool drawing acts as a guide to plumbers to understand what they are encountering. A pipe is split into different sections, called spools. These spools connect at various junctions throughout any given structure. A pipe spool drawing is optimized to provide all the information needed by the fabricator to accurately manufacture and assemble the spool. Spool drawing furnishes the complete information of all parts welded together in the shop on a single drawing.