P&ID’s, If You Please – Piping and Instrumentation Diagrams Explained

When investigating an industrial incident, one piece of information I always ask for is the relevant P&ID’s for the process. P&ID stands for Piping and Instrumentation Diagram and is defined as “A schematic diagram of the relationship between instruments, controllers, piping, and system equipment.” The information from the P&ID’s covering the vessel or vessels involved in an incident can be very useful.