1、dc-24-I y ASTM DL660 87 m 0759510 0022blll)O W AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St.,Philadelphia,Pa.19103 Reprinted from the Annual Book of ASTM Standards,Copyright ASTM If not listed in the current combjned index,will appear in the nexf edition:An American National Standard(TC D
2、esignation:D 1660-87 Standard Test Method for Thermal Stability of Aviation Turbine Fuels?This standard is issued under the fixed designation D 1660;the number immediately following the designation indicafes the year of original adoption or,in the case of revision,the year of last revision.A number
3、in parentheses indicates the year of last reapproval.A superscript epsilon(E)indicates an editorial change since the last revision or reapproval.T h i s test method has been adopted for tise by government agencies to replace Method 3464 of Federal Test Method Standard Nu.791b.1.Scope 1.1 This test m
4、ethod2 covers a procedure for rating the tendencies of aviation turbine fuels and similar gas turbine fuel oils to deposit decomposition products in the fuel system components.1.2 This standard may involve hazardous materials,oper-ations,and equipment.This standard does not purport to address all o
5、f the safety problems associated with its use.it is the responsibility o f the user o f this standard to establish appropriate safety and health practices and determine the applicability o f regulatory limitations prior to use.For specific hazard statements,see Notes i and 3 and Annex Al.2.Reference
6、d Documents 2.1 ASTM Standards:D 1655 Specification for Aviation Fuels3 D4306 Practice for Sampling Aviation Fuel for Tests Affected by Trace Contamination4 2.2 ASTM Adjuncts:ASTM-CFR Fuel Coker Record Form?Color Standard for Tube Deposit Rating(5 Aluminum 3.Definition 3.1 thermal sfability-represen
7、ts the oxidative degrada-tion of jet fuels by application of thermal stresses resulting in a fuel deposit formation which may differ based on temper-ature(s)applied.4.Summary of Test Method 4.1 This test method for measuring the high-temperature stability of aviation turbine fuels uses the ASTM-CRC
8、Fuel Coker which subjects the test fuel to temperatures and conditions similar to those occurring in some aviation turbine engines.Fuel is pumped at predetermined rates through a preheater section which simulates the hot fuel line sections of the engine as typified by an engine fuel-oil cooler.Avail
9、able from ASTM Headquarters;order Adjunct No.12-416600-00*A single sheet of No.12 Whatman Nter paper is specified for this purpose.1 This test method is under the jurisdiction of ASTM Committee D-2 on Petroleum Products and Lubricants and i s the direct responsibility of Subcom-mittee W2.J on Aviati
10、on Fuels.Current edition approved Oct.30,1987.Published December 1987.Originally published as D 1660-59.Last previous edition D 1660-72(1982)E2.2This test method was developed on the basis of cooperative work carried out by the Coordinating Research Council from 1955 to 1958,and published in CRC Rep
11、ort?Investigation of Thermal Stability of Aviation Turbine Fuels with CFR Fuel Coker,?(CRC Project CFA-2-54),July,1957 and?Fuel Thermal Stability Exchange J?rogram,(CRC Project CA-2-58),September,1958.?Annual Book ofASTMStandards,Vol 05.01.Annual Book ofASTMStandards,Vol 05.03.Available from ASTM He
12、adquarters;order Adjunct No.12-416600-01.It then passes through a heated filter section which represents the nozzle area or smail fuel passages in the hot section of the engine where fuel degradation products may become trapped.A precision sintered stainless steel filter in the heated filter section
13、 traps fuel degradation products formed during the test.The extent of the build-up is noted as an increased pressure drop across the test filter,and,in combi-nation with the deposit condition of the preheater,is used as an assessment of the thermal stability of the fuel.5.Significance and Use 5.1 Th
14、is test method is indicative of fuel performance during gas turbine operation and is used to assess fuel thermal stability at specific temperatures.6.Apparatus 6.1 ASTM-CRC Fuel Coker-Either of the two specified models of the ASTM-CRC Fuel Coker,Manual Unit(Model 01FC)or Semi-Automatic Unit(Model 02
15、FC),as described in detail in Annex A2,may be used.?6.2 Accessories and Materials-The flushing solvents,metal polish,and cleaning equipment specified in Section 7 for use in cleaning and flushing operations shall conform to the specifications listed in Annex A3 on Accessories and Materials.Other opt
16、ional tools and accessories are also described in Annex A3.These include certain essential accessories which are not furnished with the Fuel Coker.7.Preparations for Test 7.1 Fuel Pre-Filtering-The nature of the thermal sta-bility test requires that all fuel be essentially clean and free of moisture as determined visually.Accordingly,the test fuel and solvent flushing fluids shall be filtered(Warning-See Note i)by a single pass through a close-textured filter before loading the fuel reservoir.?N