Flow direction arrow
ISO 10628-2 (group 25) / PIP PIC001 (line conventions)
Drawn as
A solid arrowhead on the line.
Meaning
Direction of normal flow in the line. Use it to orient check valves and to decide which equipment is "from" and which is "to".
Variants
- Open-headed arrows are used for signal and relief flow on some legends
Not physical hardware. Read it, then skip it in the 3D model.