1、 ENGINEERING STANDARDS Test Procedure SUPERCEDED EDS-T-7760 Definition of the Deposits in the Fuel System This standard may be applied only for current projects. It is Superceded for all future projects and replaced by GMW14292. Copyright 2011 General Motors Company All Rights Reserved November 2011
2、 Originating Department: GM Korea Engineering Standards Page 1 of 2 Version : 3 1 Scope Note: Nothing in this standard supersedes applicable laws and regulations. Note: In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1 Purpose and Applic
3、ability. This test procedure is useful for the definition of substances made of fuel hoses and other elastomer parts of the fuel system from which resulted the deposit in the case of copper and its alloy. 2 References Note: Only the latest approved standards are applicable unless otherwise specified
4、. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. EDS-T-7014 2.3 Additional References. None 3 Resources 3.1 Equipment and Reagents. 3.1.1 Erlenmeyer flask 250 ml. 3.1.2 Round-bottom flask 250 ml. 3.1.3 Folded filter 125 mm. 3.1.4 Glass funnel. 3.1.5 Glass bead 3 1.5 mm.
5、 3.1.6 Copper chips. 3.1.7 Methanol-containing test fuel acc. to EDS-T-7014. 3.2 Test Piece. Cubic test specimens of 2 to 3 mm edge length are worked out from the elastomers to be tested. 20 g elastomers are required per test. 4 Procedures 4.1 Conditions. 4.1.1 Test Conditions. Deviations from the r
6、equirements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.1.2 Pretreatment. The test is to be carried out no earlier than 72 hours in the case of first sampling and dispute no earlier 72 hours after the ma
7、nufacturing for the continuous quality inspection. The test specimen must be stored minimum 8 hours in the unloaded state at +23 E 5K prior to the test. 4.2 Instructions. 4.2.1 All envelopes are cleaned prior to start of test with EDS-T-7014. GM KOREA ENGINEERING STANDARDS EDS-T-7760 Copyright 2011
8、General Motors Company All Rights Reserved November 2011 Page 2 of 2 Version : 3 4.2.2 20 g of the made test specimen are fitted with 10 g copper chips and 100 ml test fuel acc. to EDS-T-7014 under addition of 2 boiling beads and boiled 1h long by reflex. 4.2.3 Filtered by the folded filter in an Er
9、lenmeyer flask after 1 hour cooling. 4.2.4 The filtrate is stored 48 hours long at +23 E 5K in darkness in the closed Erlenmeyer flask. 5 Data 5.1 Evaluation. Fluid is judged by turbidity of separated crystal in connection with the storage term. No turbidity of formation of crystal may appear. 6 Saf
10、ety This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applic
11、ability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: EDS-T-7760 9 Release and Revisions This standard was origi
12、nated in February 1995. It was first approved by Engineering Standard Committee in February 1995. It was first published in February 1995. Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 3 NOV 2011 Apply new Engineering Standard Template. Superceded (Polymer / Organic Material Lab Team) / 4 d3TE:4 64 957 . F9I957 =* (G)8*4G D4 )
