What ISA covers
- instrumentation and control functions
- instrument identification (PT, FIC, LSH …)
- signal lines
- instrument location and accessibility
What ISO covers
- process diagram structure
- physical process components: valves, pumps, vessels, heat exchangers
- graphical symbols for equipment and piping
They are usually used together
A typical P&ID draws pumps and vessels with ISO-based symbols and the transmitters and controllers on them with ISA-based identification. You rarely choose one or the other; the project specification tells you which applies to which layer.
In InduDraft the ISA and ISO profiles share one library: ISO-based equipment and ISA-based instruments are available in both. The profile only changes which families are listed first. More detail: ISA guide · ISO guide.
Start an ISA / ISO P&ID
Opens a new P&ID with ISA instruments and ISO-based equipment available.
Start ISA P&ID