... Secretary, Standards and Practices Board, ISA, 67 Alexander Drive, P.O. Box 12277, Research Triangle Park, NC 27709, Telephone (919) 549 - 841 1, e-mail: standards@isa.org. The ISA Standards and Practices ... construction, and maintenance documents. Instrumentation Symbols and Identification Reaffirmed13 July 1992 ANSI/ISA–5.1–19 84 (R1992) Formerly ANSI/ISA–S5.1–19 84 (R19...
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