Miscellaneous P&ID Elements

A variety of components, details, and descriptions are shown on typical P&IDs, including the following: • P&ID revisions. Changes should be clearly identified by sequentially…

Line Labeling Systems

Lines generally require four to seven identifying elements. Symbology depends on the facility and organization involved. These elements are as follows: • Plant number •…

Loop Identification Systems

For additions, the existing instrument numbering system is usually extended to include new instruments. For new construction, the following methods are available: • Functional orientation.…