Why is the Invar Steam Turbine not getting a required amount of steam (it makes screeching sound)? The Tiny Steel Fluid Pipe is consistently full of 200L steam, so it should be pushing 100L/t to the Steam Turbine, but the turbine keeps whining.
No idea what's going on in your screenshot, but let me explain how steam turbines work internally. (I'll transcribe this to the Wiki later.)
A steam turbine has an internal fluid tank whose capacity being 4x larger than the maximum steam/t input of the turbine. Fluid pipes try to fill up this tank whenever possible.
When ticked, a turbine tries to consume the entire steam its tank has without regard to the fullness, as long as the amount is not less than the minimum input rate. The consumed steam turns into RU. And if the amount of RU just produced exceeds the maximum output rate, the turbine gets overloaded and shrieks.