Originally published in 1984. As told by Tom McAvinew. The use of ISA-5.1, Instrumentation Symbols and Identification, originally published in 1984, is in general quite widespread. That is because it ...

This subcommittee will utilize symbols and identification per ANSI/ISA-5.1-2009, Instrumentation Symbols and Identification ... The scope shall include these forms of the traditional P&ID. ISA5.7 does ...