1、GeneralSpecificationElectrical Function GME15490Smooth Hoses(Used for Wiring-Harnesses)1 IntroductionNote: Nothinginthisstandardsupersedesapplicablelaws and regulations.Note: In the event of a conflict between the Eng-lish and the domestic language, the English languageshall take precedence.1.1 Scop
2、e. There is no national or internationalequivalent standard to this standard.1.2 Mission / Theme. Definition of test and valida-tion requirementsforthedifferentsmooth hosesinthepassenger and engine compartment.1.3 Classification. Depended on installation posi-tion (passenger or engine compartment) t
3、he differ-ent hoses are classified into the temperature classes(T1.T8) according to Table 1.Table 1: Temperature ClassesClass Operating temperaturein CLong-term ageingtemperature 3000 hin CShort-term Ageingtemperature 240 hin CT1 -40.+85 +852 +1102T2 -40.+100 +100 2 +1253T3 -40.+125 +125 3 +1503T4 -
4、40.+150 +150 3 +1753T5 -40.+175 +175 3 +2003T6 -40.+200 +200 3 +2254T7 -40.+225 +225 4 +2504T8 -40.+250 +250 4 +27542 ReferencesNote: Only the latest approved standards are appli-cable unless otherwise specified.2.1 External Standards/Specifications.ISO 4925ISO 67222.2 GM Group Standards/Specificati
5、ons.GME14022GMW3059GMW3232GMW3235ON 2022.3 Additional References. None.3 Test Preparation and Evaluation3.1 Resources.3.1.1 Calibration. The test facilities and equipmentshall be in good working order and shall have a validcalibration label.3.1.2 Alternatives. Alternative test facilities andequipmen
6、t may also be used. However, all measur-ing variables as specified in this specification shallbe determined correctly with respect to its physicaldefinition.3.1.3 Facilities.3.1.3.1 Ovens. When an oven is required, a naturalventilated oven shall be used. Copyright 2007 General Motors Corporation All
7、 Rights ReservedPublication Department: GME Specification CenterSeptember 2007 - Issue No. 1 Page 1 of 12PRD045 - VPRE ST 1 10/03GME15490 GM EUROPE ENGINEERING STANDARDS3.1.4 Equipment. Not applicable.3.2 Test Samples. Number of test samples as spec-ified in each paragraph.The hoses to be tested sha
8、ll be manufactured underfull production conditions.No parts out of prototype tools shall be used.If not stated otherwise, for testing smooth hoses withdifferent diameters but equal material, three repre-sentative diameters (small, medium, large) shall betested.3.3 Conditioning. Test samples for all
9、tests shall bepreconditioned for at least 16 h at a temperature of(+23 5) C and a relative humidity of (50 6) %.Unless otherwise specified, all tests other than“in process” tests shall be conducted at this tempera-ture. Where no tolerance is specified, all values shallbe considered approximately.3.4
10、 Documentation. Samples of components ormaterial released to this standard shall be tested forconformity with the requirements of this standard andapproved by the responsible GM Department prior tothe start of delivery of production level componentsor materials.Anychange to thecomponentor materiale.
11、g. design,function, properties, manufacturing process and/orlocation of manufacture requires a new releaseof the product. It is the sole responsibility of thesupplier to provide the customer, unsolicited, withdocumentation of any change or modification to theproduct/process, and to apply for a new r
12、elease.If not otherwise agreed to the entire verification testshall be repeated and documented by the supplierprior to start of delivery of the modified or changedproduct. In some cases a shorter test can be agreedto between the responsible GM Department and thesupplier.3.4.1 Test Results. Test resu
13、lts shall be reported ina test report (see example in GME14022) The testreport shall include as minimum:Name of the supplier.Date.Designation.IMDS_ID and information. If the IMDS datasheethas been approved by the customer.The result and interpretation of test result.3.4.2 Deviations from Test Proced
14、ure. Deviationsfrom the requirements of the test procedures shallhave been agreed upon. Such requirements shallbe specifiedon componentdrawings, test certificates,reports etc.4 Requirements and Procedure4.1 Identification. Aspartofthe workoftypetesting,materialidentification shall be performed by me
15、ans ofdetermination of various chemical and physical prop-erties and characteristics in order to determine theproperties and characteristics of type-tested hose.This is done in order to obtain reference values thatwould be needed in the event of any claims. Depar-tures from these reference values ex
16、ceeding normaltolerances shall initiate more extensive inspection inaccordance with this standard.4.1.1 IR-spectrum. This method is used for identifi-cation of organic compounds and takes place on thebasis of the position and intensity through molecularmovement provoked absorption.The analysis of th
17、e insulation shall be performed indelivery condition, aftershort-term ageing (240 h) andafter long-term ageing (3000 h).4.2 Dimensions. Measurements according toparagraph 4.2.1 and to paragraph 4.2.2 shall beperformed at the same time.Test sample: Prepare three test samples each with alength of 500
18、mm.4.2.1 Outer Diameter (Do).4.2.1.1 Procedure. The outer diameter shall bemeasured at two points along the length of the hoseseparated by a distance of 100 mm. The diametershall be taken to be the mean value of three mea-surements at each point. The measurement shallbe made peripherally with a mutu
19、al displacement of120 .Measurement accuracy: 0.01 mm.4.2.1.2 Interpretation of Results. No single valueshall exceed the value given in Appendix A.4.2.2 Inner diameter (Di).4.2.2.1 Procedure. Theinnerdiametershallbemea-suredbyaseriesofmandrelswithanincreasingdiam-eter of 0.1 mm being passed through a
20、 test sectionof the smooth hose. The mandrel shall be inserted 50 mm into the hose. The inner diameter is equalto the diameter of the mandrel that can be easilyinserted.4.2.2.2 Interpretation of Results. No single valueshall exceed the value given in Appendix A. Copyright 2007 General Motors Corpora
21、tion All Rights ReservedPage 2 of 12 Issue No. 1 - September 2007PRD045 - VPRE ST G 10/03GM EUROPE ENGINEERING STANDARDS GME154904.2.3 Thickness (t).4.2.3.1 Procedure. The thickness shall be mea-sured at two points along the hose separated by adistance of 100 mm. The thickness shall be takento be th
22、e mean value of three measurements at eachpoint. The measurement shall be made peripherallywith a mutual displacement of 120 .4.2.3.2 Interpretation of Results. The insulationthickness shall be in accordance with Appendix A.4.3 Impact.Test sample: Prepare three test samples each witha length of 150
23、mm.Procedure: Perform the test (see paragraph 4.3.1 toparagraph 4.3.2in the middleof the test sampleusingthe apparatus shown in Figure 1).Once the hose has attained (+23 5) C, it shall bevisually examined for cracks.Figure 1: Apparatus1 Hammer2 Steel intermediate piece 100 g3 Test sample4 Steel base
24、, mass 10 kg Copyright 2007 General Motors Corporation All Rights ReservedSeptember 2007 - Issue No. 1 Page 3 of 12PRD045 - VPRE ST U 10/03GME15490 GM EUROPE ENGINEERING STANDARDS4.3.1 Impact at Delivery Conditions.4.3.1.1 Procedure. The mass of the hammer shallbe 400 g.Place the test samples after
25、preconditioned for 16 hat a temperature of (+23 5) C, parallel to the steelbase. Then allow the hammer to fall from a height of500 mm onto the hose.4.3.1.2 Interpretation of Results. Cracks, fracturesand other defects are not permitted.4.3.2 Impactafter Short-term Ageing. The mass ofthe hammer shall
26、 be 200 g.Place the sample in a vertically orientation, in a hotoven with a natural draught and long-term tempera-ture specified in Table 1 for 240 h. The air containedshall be completely changed (820) times per hour.The test sample shall be separated by 50 mm fromeach other and from the inner surfa
27、ce of the oven.Hoses of different material shall not be tested at thesame time.Immediately after ageing, withdraw the test samplesand maintain them at (+23 5) C for 16 h. Placethe test samples parallel to thesteelbase. Then allowthe hammer to fall from a height of 500 mm onto thehose.4.3.2.1 Interpr
28、etation of Results. Cracks, fracturesand other defects are not permitted.4.3.3 ImpactatLow Temperature. The mass of thehammer shall be 200 g.After conditioning the test samples for 24hinafreezing chamber at a temperature of -40 C, placethe test samples parallel to the steel base.Thenallowthehammerto
29、fallfroma heightof150mmonto the hose.Once the tube has attained (+23 5) C, it shall bevisually examined for cracks.4.3.3.1 Interpretation of Results. Cracks anddefects are not permitted.4.4 Bending Test.4.4.1 Bending after Long-term Ageing.4.4.1.1 Test Sample. Prepare three test sampleseach with a l
30、ength of 400 mm.4.4.1.2 Procedure. Place the sample in a verticallyorientation, in a hot oven with a natural draughtand long-term temperature specified in Table 1for 3000 h. The air contained shall be completelychanged (820) times per hour.The test sample shall be separated by 50 mm fromeach other a
31、nd from the inner surface of the oven.Hoses of different material shall not be tested at thesame time.Immediately after ageing, withdraw the test samplesand maintain them at (+23 5) C for 16 h.The test samples shall then be winded 720 around amandrel of four times the inner diameter of the hose.The
32、time for winding 360 shall be 5 s. The time forholding the hose in this position shall be 60 s shallbe performed at a temperature of (+23 5) C.4.4.1.3 Interpretation of Results. Cracks, fracturesand other defects are not permitted.4.4.2 Bending Test in Cold.4.4.2.1 Test Sample. Prepare three test sa
33、mpleseach with a length of 400 mm.4.4.2.2 Procedure. The test samples shall be condi-tioned for 24 h at -30 C. The test samples shall beimmediately after retaining from the chamber winded720 around a mandrel of four times the inner diam-eter of the hose. The time for winding 360 shall be 5 s.The tim
34、e for holding the hose in this position shall be 60 s.Once the hose has attained (+23 5) C. It shall bevisually examined for cracks.4.4.2.3 Interpretation of Results. The hose shallhave no cracks or fractures.4.5 Shrinkage after Heat.4.5.1 TestSample. Prepare three test samples eachwith a length of
35、200 mm.4.5.2 Procedure. Measure the exact length of thetest sample at a temperature of (+23 5) C prior tothe test. Put the test sample in a hot air oven withnatural draught, in a horizontal position, so that theair may circulate freely from all sides, for 15 min ata temperature according to Table 1
36、(3000 h) +50 C.(E.g. a class T2 hose shall be tested at +150 C.)After cooling to (+23 5) C, measure the lengthagain.4.5.3 Interpretation of Results. Depending on theused material, the shrinkage shall be 2000 100 000 20004.7 Chemical resistance4.7.1 Immersion Cracks or failure shall not occur4.7.2 St
37、orage Cracks or failure shall not occur4.8 Flammability 90% 90% 90% Copyright 2007 General Motors Corporation All Rights ReservedSeptember 2007 - Issue No. 1 Page 11 of 12PRD045 - VPRE ST U 10/03GME15490 GM EUROPE ENGINEERING STANDARDSAppendix C Copyright 2007 General Motors Corporation All Rights ReservedPage 12 of 12 Issue No. 1 - September 2007PRD045 - VPRE ST G 10/03
