Cold vent stack
Company / operator legend practice (API 6A, API 521, API 537) / PIP PIC001 / API 521
Drawn as
A vertical stack with an open top and no flame, sometimes with a small rain cap or dispersion arrows at the top.
Meaning
Atmospheric vent for low-pressure hydrocarbon vents (TEG still, flash, riser blowdown). Becomes vent-stack.
Variants
- A flame arrester or snuffing connection may be drawn at the tip
Tags
VS · X