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P&ID

P&ID is an initialism that could mean:

• Piping and instrumentation diagram - a schematical diagram showing piping, equipment and instrumentation connections within process units in oil refineries, petrochemical and chemical plants, natural gas processing plants, power plants, water treatment and similar plants

• Process and instrumentation diagram - a family of functional one-line diagrams showing hull, mechanical and electrical (HM&E) systems like piping, and cable block diagrams

See also

• Process flow diagram