GAS TURBINE FUEL OILS

ASTM Specification D 2880 covers the selection of liquid fuels for stationary gas turbines that are used for power plants. Jet fuels aircraft are covered by ASTM D 6615

There are five grades of fuel covered by ASTM D 2880. Grades 1-GT and 2-GT are distillate fuels, which differ in viscosity range. Grade 1-GT (1 to 2 cP) is the most widely used in power plants. Grade 2-GT (2 to 4 cP) may be slightly less clean burning.

Grades 3-GT and 4-GT are typically residual fuel oils or blends with 5 cP viscosity upward to semi-solid hydrocarbons that require fuel heating. The gas turbine manufactures should be consulted for appropriate specification limits.

Grade 0-GT includes naphtha, Jet B fuel, and other light hydrocarbon liquids with low flash point and low viscosity.

ISO 4261 is a parallel document to ASTM D 2880 and offers similar testing procedures and specifications for gas turbine fuel oils.

Individual gas turbine manufacturers have specifications that may be more detailed than those identified in ASTM D 2880. This is often true with regard to contaminants such as water, microbial slimes, particulates, and trace metals. Texas OilTech Laboratories, Inc. is prepared to recommend specific test packages for individual turbine manufacturers based on our knowledge of their fuel specifications