Capillary tube (filled system)
ISA 5.1-2009/2022 (instrument line symbols)
Drawn as
A thin line with small × marks at intervals.
Meaning
Filled capillary: a thermal system bulb to its gauge or regulator, or a diaphragm seal to a transmitter. Part of the instrument; not modelled separately.
Variants
- Do not confuse with demolished lines (heavy, hatched) on brownfield drawings
No 3D component yet.