ISO 4261:2013 pdf download.Petroleum products – Fuels (class F)一Specifications of gas turbine fuels for industrial and marine applications.
ISO 4261 specifies the requirements for petroleum fuels for gas turbines (see Iso 3977) used in public utility, industrial, and marine applications. It does not cover requirements for gas turbine fuels for aviation use. ISO 4261 is intended for the guidance of users such as turbine manufacturers, suppliers, and purchasers of gas turbine fuels.
ISO 4261 sets out the properties of fuels at the time and place of transfer of custody to the user. Further information and recommendations for the quality of the fuel entering the turbine combustion chambers are provided in Annex B.
The terminology used and the test methods referred to in these specifications are presented in Annex C. NOTE 1 Additional information on fuels for gas turbines is given in ISO 3977.
NOTE 2 The requirements for petroleum fuels for diesel engines and steam turbines for marine use are given in ISO 8217.
The fuel categories in this International Standard have been classified in accordance with ISO 8216-2:1986.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2160, Petroleum products — Corrosiveness to copper — Copper strip test ISO 2719, Determination offlash point — Pensky-Martens closed cup method
ISO 3104, Petroleum products — Transparent and opaque liquids — Determination of kinematic viscosity and calculation of dynamic viscosity
ISO 3170, Petroleum liquids — Manual sampling
ISO 3171, Petroleum liquids — Automatic pipeline sampling
ISO 3405, Petroleum products — Determination of distillation characteristics at atmospheric pressure
ISO 3675, Crude petroleum and liquid petroleum products — Laboratory determination of density — Hydrometer method
ISO 3733, Petroleum products and bituminous materials — Determination of water — Distillation method ISO 3735, Crude petroleum and fuel oils — Determination of sediment — Extraction method
ISO 4259, Petroleum products — Determination and application of precision data in relation to methods of test
3 General requirements
3.1 The fuel shall be a homogeneous mixture of hydrocarbons, free from inorganic acids and adventitious foreign matter.
NOTE Guidelines for limits for trace metals for fuels entering the turbine combustion chambers are contained in Annex A.
3.2 Fuels of all categories shall remain homogeneous during storage and handling in the countries or locality where the fuel is to be used, taking into account local storage conditions, handling, and duration of storage.
4 Detailed requirements
NOTE The properties listed in this specification are those which permit acceptable performance of the turbine. However, certain metals, even in trace quantities, are detrimental to gas turbine service life. In formation on the significance and concentration of critical metallic elements in the fuel as it enters the turbine combustion chambers is provided in Annex B.
4.1 The various categories of gas turbine fuels shall conform to the limiting requirements shown in Table 1 when the fuel is tested by the methods specified.ISO 4261 pdf download.