P&ID Symbols and Notation

P&ID symbols are standard shapes used in piping and instrumentation diagrams to represent the functional relationship between piping, instrumentation, and system equipment units in process industry facilities.

P&ID symbols are organized into seven main groups: equipment, piping, vessels, heat exchangers, pumps, instruments, and valves.

Equipment symbols represent miscellaneous P&ID units such aslike compressors, conveyors, motors, turbines, vacuums, and other mechanical devices that don't fit into other categories.

Piping symbols represent tubes that transport fluid substances and include pipes, multi-line pipes, and separators, while vessel symbols represent containers used to store fluid, such as tanks, cylinders, columns, and bags.

Instrument symbols represent devices that measure and sometimes control quantities such as flow, temperature, angle, or pressure. These devices include indicators, transmitters, recordings, controllers, and elements.

Valve symbols represent devices that regulate, direct, or control the flow of a fluid by opening, closing, or partially obstructing passageways in a piping system. These devices include rotameters, orifices, and other valve types.

Yes, Lucidchart allows users to import SVG and other image files to create a custom P&ID library for any use case beyond the standard symbols provided.