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ENGINEERING FLUIDS DIAGRAMS AND PRINTS
Valve  Symbols

Engineering Symbology Prints and Drawings Volume 1 of 2
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DOE-HDBK-1016/1-93 ENGINEERING FLUIDS DIAGRAMS AND PRINTS Engineering Fluid Diagrams and Prints EO  1.5 IDENTIFY  the  symbols  used  on  engineering  P&IDs  for  the following  basic  types of  instrumentation: a. Differential  pressure  cell b. Temperature  element c. Venturi d. Orifice e. Rotometer f. Conductivity  or salinity  cell g. Radiation  detector EO  1.6 IDENTIFY  the  symbols used  on  engineering  P&IDs to  denote the  location,  either  local  or  board  mounted,  of  instruments, indicators, and  controllers. EO  1.7 IDENTIFY  the  symbols  used  on  engineering  P&IDs  for  the following  types of  instrument  signal  modifiers: a. Proportional b. Proportional-integral c. Proportional-integral-differential d. Square  root  extractors EO  1.8 IDENTIFY  the  symbols  used  on  engineering  P&IDs  for  the following  types of  system  components: a. Centrifugal  pumps b. Positive  displacement  pumps c. Heat  exchangers d. Compressors e. Fans f. Tanks g. Filters/strainers Symbology To read and interpret piping and instrument drawings (P&IDs), the reader must learn the meaning of the symbols.  This chapter discusses the common symbols that are used to depict fluid system components.  When the symbology is mastered, the reader will be able to interpret most P&IDs. The reader should note that this chapter is only representative of fluid system symbology, rather than  being  all-inclusive.    The  symbols  presented  herein  are  those  most  commonly  used  in engineering P&IDs.  The reader may expand his or her knowledge by obtaining and studying the appropriate drafting standards used at his or her facility. PR-02 Rev. 0 Page 2







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