Thermal stability is a measure of the amount of heat jet fuel can be exposed to before it oxidizes. The thermal stability of fuel used requires improvement as aircrafts are upgraded to improve fuel consumption. It is a requirement because of the quantity of heat produced increases with flight velocity. Additionally, jet fuel absorbs excess heat from cooling aircraft components such as engine oil, which leads to fuel oxidation. The fuel performance during gas turbine operation can be assessed by the level of deposits that form when liquid fuel contacts a heated surface at a specified temperature. The final tube rating is an estimate of the degraded fuel deposit on the tube. This rating is just one basis for judging the overall stability of the fuel sample.

This heater tube could be used on PAC ALCOR Ⅱ & Ⅲ