Different P&IDs can represent the same engineering equipment in different ways. The applicable drawing convention usually depends on the project, company, industry and country.
ISA is widely used for instrumentation and control. ISO standards provide graphical symbols for process equipment and diagrams. Japan, China and Russia also have national standards for instrumentation symbols.
| Standard | Typical context | Strongest relevance | InduDraft support |
|---|---|---|---|
| ISA | Americas; international instrumentation | Instrument identification, control functions, signals | ISA-based library available |
| ISO / EN | International; European adoptions | Process equipment and piping symbols | ISO-based library available |
| JIS | Japanese projects | Instrumentation symbols (JIS Z 8204) | Profile available · symbol verification in progress |
| GB | Chinese projects | Measurement and control symbols (GB/T 2625) | Profile available · symbol verification in progress |
| GOST | Russian and some CIS documentation | Automation symbols (GOST 21.208) | Profile available · symbol verification in progress |
Projects rarely use only one
- Instruments and equipment often follow different standards on the same sheet.
- Companies usually have their own drawing specification on top of the standards.
- The project specification normally overrides generic assumptions about a country.
Read the detailed guides: ISA · ISO / EN · JIS · GB · GOST.
Start a P&ID in InduDraft
Opens with ISA selected. Switch standard in the left sidebar at any time.
Start ISA P&ID