By Frederick A. Meier, Clifford A. Meier
This publication presents the reader with wisdom had to comprehend and follow the symbols and files used to outline a latest commercial instrumentation and keep watch over method. The files that describe sleek business techniques, like so much technical paintings, imagine a few point of realizing at the readers half. The records use a schematic, symbol-based language that could resemble Mayan hieroglyphics to these unexpected with the method nomenclature. The symbols, notwithstanding, comprise a wealth of data when you may be able to translate them. This ebook will educate you to learn, comprehend, and follow the symbols and files used to outline a latest business instrumentation and keep watch over process. For more matured execs, insights into utilizing the symbols and files extra successfully are supplied. adaptations within the use of symbols and records are given in addition to the pitfalls to prevent. to higher comprehend procedure documentation this day, perception into how and while files are constructed, who develops them, why they're built, and the way they're used is equipped. the categories of files mentioned contain strategy stream diagrams, piping and instrumentation drawings, software lists, specification types, common sense diagrams, install info, place plans, and loop diagrams.
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Extra info for Instrumentation And Control Systems Documentation, Second Edition
The dotted line indicates that information is transmitted electronically from the flow transmitter, FT-101, to the indicating controller, FIC101, and from the controller to the current to pneumatic converter (I/P), FY 101. FT-101 senses the differential pressure proportional to the flow rate in the line caused by FE-101, a flow element or orifice plate. FT-101 transmits a 4-20 mA dc (direct current) signal corresponding to the varying differential pressure. FIC-101, an electronic flow indicating controller, transmits a 4-20 mA dc signal to the converter or transducer, FY-101, that converts the 4-20 mA dc signal into 25 Natural Gas Can Substitute for Air Pneumatic systems are not always pressurized by instrument air.
Figure 2-17: Typical Transmitters – Flow FE 99 FT 99 Orifice plate and orifice flanges with flange taps, differential pressure transmitter, pneumatic transmission FE 1 FT 1 Orifice plate and flanges, taps are made in pipe, differential pressure transmitter, electronic transmission FE 100 FT 100 Venturi tube; taps are in tube, differential pressure transmitter with indicator, undefined transmission FE 15 FT 15 Pitot tube, connections are in tube, differential pressure transmitter, electronic transmission P&IDs and Symbols 41 Figure 2-17 shows several variations of primary flow elements that produce a pressure differential relative to flow: an orifice plate and flanges with flange taps, an orifice plate and flanges and pipe taps, a venturi tube, and a pitot tube.
Methods of symbolization and identification are demonstrated. The examples show identification that is typical for the pictured instrument or functional interrelationships. The symbols indicate the various instruments or functions have been applied in typical ways in the illustrations. This usage does not imply, however, that the applications as designations of the instrument or functions are restricted in any way. No inference should be drawn that the choice of any of the schemes for illustration constitutes a recommendation for the illustrated methods of measurement or control.