Plumbing/Piping Drawings, ContinuedSymbols andmarkingsMIL-STD-17B, part I, lists mechanical symbols used on piping prints otherthan those used for aeronautical, aerospacecraft, and spacecraft (listed in partII).When an item is not covered in the standards, the responsible ororiginating activity designs a suitable symbol and explains it in a note. Whenmore than one piping system of the same kind appears on a print, use lettersadded to the symbols to differentiate between the systems.Figure 4-50 is a list of common pipe line symbols.Figure 4-50.—Common pipe line symbols.Continued on next page4-60
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