Just hanging around

At unit EC 4.
This is a so-called "constant-hanger".
Constant hangers and constant supports are used for piping and related components where higher levels of vertical travel occur. Their job is to transfer the working load over the whole travel area while maintaining constancy, i.e., without any considerable deviations.
Here it supports a steampipe.
In the back, some 20 meters lower: the spare rotor of the gasturbine.

Here in LARGE....

Here is an impression of that rotor.