ISO 6249:2021 PDF

Scope: This document specifies a procedure for rating the tendencies of gas turbine fuels to deposit decomposition products within the fuel system. It is applicable to middle distillate and wide-cut fuels and is particularly specified for the performance of aviation gas turbine fuels. The test results are indicative of fuel thermal oxidation stability during gas turbine operation and can be used to assess the level of deposits that form when liquid fuel contacts a heated surface at a specified temperature. This method is also applicable to aviation turbine fuel that consists of conventional and synthetic blending components as defined in the scope of for instance ASTM D7566[1] and Def Stan 91-091[2]. NOTE For the benefit of those using older instruments, non-SI-units and recalculated numbers are given in between brackets where they are more suitable.

ISO 6249:2021 Referenced Document

ISO 3170 Petroleum liquids - Manual sampling
ISO 3171 Petroleum liquids; automatic pipeline sampling
ISO 3274 Geometrical Product Specifications (GPS) - Surface texture: Profile method - Nominal characteristics of contact (stylus) instruments; Technical Corrigendum 1
ISO 4288 Geometrical Product Specifications (GPS) - Surface texture: Profile method - Rules and procedures for the assessment of surface texture; Technical Corrigendum 1

2021 ISO 6249:2021 Petroleum products - Determination of thermal oxidation stability of gas turbine fuels
1999 ISO 6249:1999 Petroleum products - Determination of thermal oxidation stability of gas turbine fuels - JFTOT method
1984 ISO 6249:1984 Petroleum products — Gas turbine fuels — Determination of thermal oxidation stability — JFTOT method