ISA
Americas, international instrumentation
ISA-based library available
Instrument tags like PT, FT and LIC, and how instruments are drawn.
Guides
Engineering drawing guides
Short, practical guides to P&ID standards and notation. Learn how the common standards differ, then open InduDraft with the right symbol library already selected.
P&ID standards
ISO / EN
International, Europe
ISO-based library available
Process equipment symbols from ISO 10628 and ISO 14617.
JIS
Japan
Profile available · symbol verification in progress
JIS Z 8204 instrumentation symbols for Japanese documentation.
GB
China
Profile available · symbol verification in progress
GB/T 2625 symbols and letter codes for control flow diagrams.
GOST
Russia, parts of CIS
Profile available · symbol verification in progress
GOST 21.208-2013 instrument and automation symbols.
P&ID practice
Comparison
ISA · ISO · JIS · GB · GOST
Which standard covers what, and when you are likely to meet it.
ISA vs ISO
Instrumentation vs equipment
Why most P&IDs use ISA instruments on ISO equipment.
Instrument tags
PT · PIT · PIC · FT · LT
PT, PI, PIT, PIC, PSH, FT, LT and TT in plain words.
Fail open vs fail closed
Control valves
FO, FC and FL on control valves, and normal position vs failure position.
Field vs control room
Instrument location
What the bar in an instrument bubble means.
Single line diagram
Electrical · SLD
Supply, transformer, busbar, breakers and loads in six steps.