P&ID Typicals and Symbols Piping Process Deliverables Process Design

Fittings P&ID symbol

Commonly used P&ID symbols (Piping and Instrumentation Diagram symbols) for piping fittings. Note that they may differ slightly from one project to another.

Flange set {adinserter 1}
Blind Flange
Flow orifice
Removable pipe spool {adinserter 1}
Tee type strainer
Y type strainer
Basket type strainer {adinserter 1}
2 basket type strainer
End plug
End cap
Reducer / Expander
Hose connection
Open spacer
Closed spacer
Open spectacle blind
Closed spectacle blind
Mixing Tee
Sight glass
Gooseneck vent
Sample cooler


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