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Piping and Instrument Diagrams CM4120 Chemical Plant Operations.

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Presentation on theme: "Piping and Instrument Diagrams CM4120 Chemical Plant Operations."— Presentation transcript:

1 Piping and Instrument Diagrams CM4120 Chemical Plant Operations

2 A P&ID is: A P&ID is not: n Language of Symbols n Schematic of Process n Displays Relative Orientation/Configurat ion n Communication Tool n Graphical Table of Contents n Piping Isometric n Equipment Fabrication Diagram n Scale Drawing n Control Logic Diagram n Something to Convey Process Information!

3 Line Designator - First Letter n W - Water or Heat Transfer Fluid n L - Process Fluid n G – Gas (not a process fluid) n V - Vent or Vacuum n S - Steam n C - Condensate

4 Line Designator - Pipe Size n Following line number is the line size n Given in inches

5 Line Designator - Pipe Spec. n A – 316 SS tubing w/.038” wall n C SS pipe Schedule 40 n D - Carbon Steel Sched. 40 (steam) Sched. 80 (Syltherm) n H - Copper Tubing

6 Equipment Symbols

7

8 Equipment Designations n D - Distillation Tower n E - Heat Exchanger n F - Filter n M - Misc. Equipment n P - Pump n R - Reactor n T - Tank

9 Manual Valve Symbols

10 Control Valve Symbols

11 Valve Failure Positions

12 Instrument Symbols

13 Control Symbols

14 ISA Instrument Identification n Transmitters/sensing elements: – FT – flow transmitter – LE – level element n Indicators : – AI – analytical indicator – LI – level indicator – PAH – pressure alarm high n Controllers : – TIC – temp indicating controller – FFIC – ratio flow controller n Controlled devices: – FY – flow transducer – LV – level valve

15 References for ISA symbols: Riggs, Chemical Process Control, Appendix A The Engineering Tool Box, 6_37.html


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