DOE-HDBK-1016/1-93Engineering Fluid Diagrams and PrintsENGINEERING FLUIDS DIAGRAMS AND PRINTSPipingSystemsFigure 7 Piping SymbolsThe piping of a single system maycontain more than a single medium.For example, although the mainprocess flow line may carry water, theassociated auxiliary piping may carrycompressed air, inert gas, or hydraulicfluid. Also, a fluid system diagrammay also depict instrument signals andelectrical wires as well as piping.Figure 7 shows commonly usedsymbols for indicating the mediumcarried by the piping and fordifferentiating between piping,instrumentation signals, and electricalwires. Note that, although theauxiliary piping symbols identify theirmediums, the symbol for the processflow line does not identify its medium.Rev. 0PR-02Page 7
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