Off-page connector.
A pentagon-shaped arrow with a destination tag inside. Off-page connectors carry signals or process lines from one drawing page to another in multi-page P&ID sets.
How it's drawn.
A pentagon or arrow shape carrying a destination tag, used to carry a line or signal from one drawing page to another in a multi-page set. The annotation inside, such as a to or from reference with the sheet number, is the point of the symbol and is always filled in.
Typical usage.
Cross-train interlocks on large plants, cross-page line continuations, transmitter signals routed to controllers on a separate drawing. The destination annotation, TO P-12, FROM P-04 is mandatory. Missing or wrong annotations are the most common forensic exercise on a 200-page set.
Telling it apart.
- An off-page connector continues a line on another sheet. It is not an instrument or a valve.
- The destination reference is mandatory. Without the to or from sheet number the connector cannot be followed.
- It marks where a line leaves or enters the page, not a physical device in the plant.
Related.
Get the P&ID symbol cheat sheet.
One page covering off-page connectors, continuation flags, and the instrument bubble conventions around them.