Page 63 - Analysis, Synthesis and Design of Chemical Processes, Third Edition

In addition to the three diagrams, there are a number of other diagrams used in the construction and
engineering phase of a project. However, these diagrams contain little additional information about the
process.

Finally, the logic for equipment placement and layout within the process is presented. The reasons for
elevating equipment and providing access are discussed, and a 3-D representation of a DME plant is
presented.

The PFD is the single most important diagram for the chemical or process engineer and will form the
basis of much of the discussion covered in this book.

References

1. Kauffman, D., “Flow Sheets and Diagrams,” AIChE Modular Instruction, Series G:
Design of Equipment, series editor J. Beckman, American Institute of Chemical
Engineers, New York, 1986, vol. 1, Chapter G.1.5. Reproduced by permission of the
American Institute of Chemical Engineers, AIChE copyright © 1986, all rights reserved.

2 . Graphical Symbols for Process Flow Diagrams, ASA Y32.11 (New York: American
Society of Mechanical Engineers, 1961).

3. Austin, D. G., Chemical Engineering Drawing Symbols (London: George Godwin, 1979).

4. Instrument Symbols and Identification, Research Triangle Park, NC: Instrument Society
of America, Standard ISA-S5-1, 1975.

5. Bausbacher, E. and R. Hunt, Process Plant Layout and Piping Design (Upper Saddle
River, NJ: Prentice Hall PTR, 1998).

Short Answer Questions

What are the three principal types of diagrams used by process engineers to describe the flow of
chemicals in a process? On which of these diagrams would you expect to see the following items:

a. the temperature and pressure of a process stream

b. an overview of a multiple-unit process
1.

c. a major control loop

d. a pressure indicator

e. a pressure-relief valve