P&ID - Piping and Instrumentation Diagram

http://www.engineeringtoolbox.com/p-id-piping-instrumentation-diagram-d_466.html

A Piping and Instrumentation Diagram - P&ID, is a schematic illustration of functional relationship of piping, instrumentation and system equipment components

Функциональные схемы автоматизации

Используется стандарт ISA