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Standards

ISA-5.1

Definition

The instrumentation symbology standard, defining the tag bubbles, line types, and identification letters used on P&IDs.

It is why an instrument bubble reading LIT-101 is understood as a level indicating transmitter, loop 101, anywhere in the industry.

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ISA Standards for ControlsThe International Society of Automation standards a controls practitioner meets: ISA-5.1 symbols and tags, ISA-18.2 alarm management, ISA-101 HMI design, ISA-88 and ISA-95 for batch and enterprise integration, ISA-99 which became IEC 62443, ISA-20 specification forms, and how each is used on a water or wastewater project.

See also

P&ID

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