ISO 11365:2017 is applicable to the use of triaryl phosphate esters as fire-resistant fluids for turbine control and other hydraulic systems in power generation. These fluids fall under category HFDR of ISO 6743‑4^[1].

ISO 11365:2017 is intended to:

- assist the power equipment operator to maintain the fluid in a condition that will ensure the safe and reliable operation of the turbine while maximizing fluid life;

- recommend procedures for examining consignments of new fluid and monitoring the fluid in use;

- provide information on the safe handling, storage and disposal of the fluid;

- offer background information on the causes of fluid degradation.