Cooling tower symbol
A cooling tower cools water by evaporating part of it into air drawn up through the tower.
What the cooling tower symbol means
A cooling tower cools water by evaporating part of it into air drawn up through the tower.
How it is drawn
The curved hyperbolic outline of a natural draft tower, or a box with a fan on top for a mechanical draft tower.
The cooling tower symbol in each standard
Drawn as on most US-style legend sheets.
Cooling tower (general). A tapered tower on a basin. Wet, dry, natural, forced and induced draught types are X8109 to X8115.
ISO SVG
German (DIN): Kühlturm. See DIN P&ID symbols.
Where you see it on a P&ID
On cooling water systems for power plants, refineries and chemical plants.
Tag codes
The cooling tower is commonly tagged:
- CT
Tag formats follow the project numbering procedure. For instruments, the letters follow ISA 5.1, explained on the instrument symbols page.
Related symbols
Frequently asked questions
What does the cooling tower symbol look like on a P&ID?
The curved hyperbolic outline of a natural draft tower, or a box with a fan on top for a mechanical draft tower.
What is a cooling tower used for?
A cooling tower cools water by evaporating part of it into air drawn up through the tower. You will find it on cooling water systems for power plants, refineries and chemical plants.
What tag does a cooling tower have?
It is commonly tagged CT. The exact tag format comes from the project numbering procedure and the legend sheets.
Is the cooling tower symbol the same in ISA and ISO?
No. A tapered tower on a basin. Wet, dry, natural, forced and induced draught types are X8109 to X8115. The ISO 10628-2 registration number is 2521. Always check the legend sheets at the front of the P&ID set.
What is the cooling tower called in German?
Kühlturm. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.
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