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Components of Control Loops and ISA Symbology

ISA Symbology The Instrumentation, Systems, and Automation Society (ISA) is one of the leading process control trade and standards organizations. The ISA has developed a set of symbols for use in engineering drawings and designs of control loops (ISA S5.1 instrumentation symbol specification). You should be familiar with ISA symbology so that you can demonstrate possible process control loop solutions on paper to your customer. Figure 7.5 shows a control loop using ISA symbology. Drawings of this kind are known as piping and instrumentation drawings (P&ID).

Activities 12. What does the acronym P&ID stand for?

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FIC 123

SP

TIC 123

TY 123

4

Piping and Instrument Designing Piping and Instrumentation Drawing Process Control and Installation Drawing Proportional, Intergral and Derivative control

YIC 123 TT 123

FT 123

Piping and Instrumentation Drawing (P&ID)

Fundamentals of Control

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