(Piping & Instrumentation Diagrams) Diagrams that conform to ANSI/ISA's S5.1-1984 (R 1992) instrumentation symbols and identification standards.
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P&FA
P&G PAC
P&HEP
P&HTGR
P&I
P&II
P&IM Rev
P&L
P&L (investment)
P&L DISTR