Turbine symbol
Also called Steam turbine, Gas turbine, Expander
A turbine takes energy out of an expanding gas or steam to drive a compressor, pump or generator.
What the turbine symbol means
A turbine takes energy out of an expanding gas or steam to drive a compressor, pump or generator.
How it is drawn
A trapezoid that widens from the inlet to the outlet, the opposite of a compressor.
The turbine symbol in each standard
Drawn as on most US-style legend sheets.
Turbine (general). Drawn the same way: a shape widening towards the outlet.
German (DIN): Turbine. See DIN P&ID symbols.
Where you see it on a P&ID
As drivers for compressors, pumps and generators, and as expanders in gas plants.
Tag codes
The turbine is commonly tagged:
- KT
- ST
- GT
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 turbine symbol look like on a P&ID?
A trapezoid that widens from the inlet to the outlet, the opposite of a compressor.
What is a turbine used for?
A turbine takes energy out of an expanding gas or steam to drive a compressor, pump or generator. You will find it as drivers for compressors, pumps and generators, and as expanders in gas plants.
What tag does a turbine have?
It is commonly tagged KT, ST, GT. The exact tag format comes from the project numbering procedure and the legend sheets.
Is the turbine symbol the same in ISA and ISO?
Yes, ISO 10628-2 draws it the same way (2571). Companies vary the details, so always check the legend sheets at the front of the P&ID set.
What is the turbine called in German?
Turbine. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.
- In production since 2014
- Thousands of daily users
- On MODEC FPSO projects since 2016