1、EUROPEENGINEERINGSTANDARDSGeneral Specification SUPERCEDEDGME15491Heat Shrink Tubes(used for wiring harnesses)Note: This standard may be applied only for current projects.It is Superceded for all future projects and replaced by GMW17136. Copyright 2014 General Motors Company All Rights ReservedIssue
2、 No. 2 May 2014 Page 1 of 161 Introduction 41.1 Scope 41.2 Mission / Theme 41.3 Classification 41.3.1 Temperature Classes 41.3.2 Material 42 References 42.1 External Standards/Specifications 42.2 GM Standards/Specifications 43 Test Preparation and Evaluation 53.1 Resources 53.1.1 Calibration 53.1.2
3、Alternatives 53.1.3 Facilities 53.1.4 Equipment 53.1.5 Test Vehicle/Test Piece 53.1.6 Test Time 53.1.7 Test Required Information 53.1.8 Personnel/Skills 53.2 Preparation 53.3 Conditions 53.3.1 Environmental Conditions 53.3.2 Test Conditions 53.4 Instructions 53.5 Data 53.6 Safety 53.7 Documentation
4、53.7.1 Test Results 54 Requirements and Procedure 54.1 Colours 5GM EUROPE ENGINEERING STANDARDS SUPERCEDED GME15491 Copyright 2014 General Motors Company All Rights ReservedIssue No. 2 May 2014 Page 2 of 164.2 Dimensions 64.2.1 Shrink Tube Internal Diameter (As Supplied) 64.2.2 Inside Diameter After
5、 Shrinkage (Fully Recovered) 64.2.3 Thickness, After Shrinkage 64.3 Tensile Strength and Elongation 64.3.1 Interpretation of Results 64.4 Water Tightness (Sealed Tubes Only) 64.4.1 Test Sample 64.4.2 Procedure 64.4.3 Interpretation of Result 64.5 Short Term Ageing 74.5.1 Test Samples 74.5.2 Apparatu
6、s 74.5.3 Procedure 74.5.4 Interpretation of Results 74.6 Long Term Ageing 74.6.1 Test Samples 74.6.2 Apparatus 74.6.3 Procedure 74.6.4 Interpretation of Results 74.7 Abrasion Resistance 74.7.1 Test Samples 74.7.2 Apparatus / Procedure 74.7.3 Interpretation of Results 84.8 Cold Impact 84.8.1 Test Sam
7、ples 84.8.2 Test Samples 84.8.3 Apparatus 84.8.4 Procedure 84.8.5 Interpretation of Results 84.9 Pressure / Vacuum Leak, (Sealed Tubes Only) (Test Only for the Harness Manufacturer) 84.9.1 Apparatus 84.9.2 Procedure 84.9.3 Interpretation of Results 94.10 Chemical Resistance 94.10.1 Chemical Test for
8、 Sealed Shrink Tubes 94.10.2 Chemical Test for Non Sealed Shrink Tubes 104.11 Vibration Test 104.11.1 Test Sample 10GM EUROPE ENGINEERING STANDARDS SUPERCEDED GME15491 Copyright 2014 General Motors Company All Rights ReservedIssue No. 2 May 2014 Page 3 of 164.11.2 Procedure 104.11.3 Interpretation o
9、f Results 104.12 Strain Relief 114.12.1 Test Sample 114.12.2 Procedure 114.12.3 Interpretation of Result 114.13 Environmental Cycling 114.13.1 Test Sample 114.13.2 Apparatus 114.13.3 Procedure 114.13.4 Interpretation of Results 114.14 Flammability 125 Provisions for Shipping 126 Notes 126.1 Glossary
10、 126.2 Acronyms, Abbreviations, and Symbols 127 Additional Paragraphs 128 Coding System 129 Release and Revisions 12Appendix A: Dimensions 13Appendix B: Requirements 15GM EUROPE ENGINEERING STANDARDS SUPERCEDED GME15491 Copyright 2014 General Motors Company All Rights ReservedIssue No. 2 May 2014 Pa
11、ge 4 of 161 IntroductionNote: Nothing in this standard supercedes applicable laws and regulations.Note: In the event of conflict between the English and domestic language, the English language shall takeprecedence.1.1 Scope. This standard specifies dimensions, test methods and requirements for seale
12、d and non sealed heatshrinkable tubings. There is no international or national equivalent to this standard.1.2 Mission / Theme. The shrink tube is intended to be used as protection for splice connections, ring terminalsor wherever a protected cover is needed.1.3 Classification.1.3.1 Temperature Clas
13、ses. Different shrink tube classes are defined in Table 1 to respond to the varioustemperatures encountered on vehicles.Table 1: Temperature Class RatingClass Operating temperaturein CLong-term ageingtemperature 3000 hin CShort-term ageingtemperature 240 hin CA -40.+85 +85 2 +110 2B -40.+100 +100 2
14、+125 3C -40.+125 +125 3 +150 3D -40.+150 +150 3 +175 3E -40.+175 +175 3 +200 3F -40.+200 +200 3 +225 4G -40.+225 +225 4 +250 4H -40.+250 +250 4 +275 41.3.2 Material. Table 2 defines the material codes for the shrink tube material.Table 2: Material CodeMaterial Code MaterialA Cross linked polyolefinB
15、 Cross linked polyolefin with EVA based adhesive linerC Cross linked polyolefin with Polyamide based adhesive linerD Spezial code. Material shall be seperately defined on drawing / in math data2 ReferencesNote: Only the latest approved standards are applicable unless otherwise specified.2.1 External
16、 Standards/Specifications.ISO 37 ISO 4925 ISO 6722 ISO 6931-1IEC 60068-2-62.2 GM Standards/Specifications.GMW3059 GMW3176 GMW3191 GMW3232GMW15626GM EUROPE ENGINEERING STANDARDS SUPERCEDED GME15491 Copyright 2014 General Motors Company All Rights ReservedIssue No. 2 May 2014 Page 5 of 163 Test Prepar
17、ation and Evaluation3.1 Resources.3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a validcalibration label.3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variablesas specified in this standard
18、shall be determined correctly with respect to their physical definition.3.1.3 Facilities.3.1.3.1 Ovens. When an oven is required, a natural ventilated oven according to ISO 6722 shall be used.3.1.4 Equipment. As specified in each test.3.1.5 Test Vehicle/Test Piece. Number of test samples as specifie
19、d in each paragraph. The Shrink tube to betested shall be manufactured under full production conditions. No parts out of prototype tools shall be used.3.1.6 Test Time. As specified in each single test.3.1.7 Test Required Information. Not applicable.3.1.8 Personnel/Skills. Not applicable.3.2 Preparat
20、ion. See each individual test.3.3 Conditions.3.3.1 Environmental Conditions. Test samples for all tests shall be preconditioned for at least 16 h at atemperature of (+23 5) C and a relative humidity of (45.75) %. Unless otherwise specified, all tests otherthan “in process” tests shall be conducted a
21、t this temperature. Where no tolerance is specified, all values shallbe considered approximately.3.3.2 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Suchrequirements shall be specified on component drawings, test certificates, reports, etc.3.4 Instru
22、ctions. See each individual test.3.5 Data. See paragraph 3.7.1.3.6 Safety. This standard may involve hazardous materials, operations, and equipment. This standard does notpropose to address all the safety problems associated with its use. It is the responsibility of the user of thisstandard to estab
23、lish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.3.7 Documentation. Samples of components or material released to this standard shall be tested for conformitywith the requirements of this standard and approved by the responsible GM De
24、partment prior to the start ofdelivery of production level components or materials.Any change to the component or material, e.g., design, function, properties, manufacturing process and/orlocation of manufacture requires a new release of the product. It is the sole responsibility of the supplier top
25、rovide the customer, unsolicited, with documentation of any change or modification to the product/process, andto apply for a new release.If not otherwise agreed to, the entire verification test shall be repeated and documented by the supplier prior tostart of delivery of the modified or changed prod
26、uct. In some cases, a shorter test can be agreed to between theresponsible GM department and the supplier.3.7.1 Test Results. Test results shall be reported in a test report, see GMW15626 (example in Appendix A).The test report shall include as minimum:x Name of the supplierx Datex Designation (poss
27、ible deviations, see Appendix A)x IMDS_ID and information. If the IMDS datasheet has been approved by the customerx The result and interpretation of test result4 Requirements and Procedure4.1 Colours. Colours of shrink tubes shall agree reasonably closely with the specified colours in GMW3176.GM EUR
28、OPE ENGINEERING STANDARDS SUPERCEDED GME15491 Copyright 2014 General Motors Company All Rights ReservedIssue No. 2 May 2014 Page 6 of 164.2 Dimensions.4.2.1 Shrink Tube Internal Diameter (As Supplied).4.2.1.1 Test Samples. Prepare three test samples with a length of 150 mm each.4.2.1.2 Procedure. Th
29、e inner diameter is measured by a series of mandrels with diameter intervals of 0.1 mmbeing passed through a test section of tubes. The mandrel shall be inserted into the tube about 30 mm. Theinside diameter is equal to the diameter of the mandrel that can be easily inserted into the tube.Measuremen
30、t accuracy: 0.1 mm4.2.1.3 Interpretation of Results. All values shall be conform to Appendix A.4.2.2 Inside Diameter After Shrinkage (Fully Recovered).4.2.2.1 Test Samples. Prepare three test samples with a length of 150 mm each. Fully shrunk diameter shallbe in accordance with Appendix A.4.2.3 Thic
31、kness, After Shrinkage.4.2.3.1 Test Samples. Prepare three test samples with a length of 150 mm each.4.2.3.2 Procedure. Shrink the tube in accordance with the manufacturers recommendation. Then measure thethickness at 2 points along the tube separated of a distance of 20 mm. The thickness shall be t
32、aken to be themean value of three measurements at each point.4.2.3.3 Interpretation of Results. The thickness after shrinkage shall be according to Appendix A.4.3 Tensile Strength and Elongation. The test method shall be as specified in ISO 37. For sleeving ofrecovered bore 6 mm, three Type 2 dumb-b
33、ell specimens shall be tested. For sleeving of recovered bore 6 mm, three tubular specimens 125 mm long shall be tested. Initial jaw separation shall be 50 mm and rate ofjaw separation shall be (100 10) mm/minute. The test shall be performed at (+23 5) C. Take the medianvalue of the three readings.
34、Calculate the cross-sectional area of the test specimens based on the outer jacketwall thickness only, in mm2, by using following formula:WhereD = Outside diameter/ = Inner diameter of the outer wallW = Dumb-bell widtht = Dumb-bell thickness4.3.1 Interpretation of Results. See Appendix B.4.4 Water T
35、ightness (Sealed Tubes Only).4.4.1 Test Sample. Three test pieces shall be prepared of each combination, see Table 3. The cables used forthe test shall comply with the temperature class of the shrink tube. The splice assembly is constructed as shownin Figure 1. Installation shall be per manufacturer
36、s recommendations.4.4.2 Procedure. See GMW3191, Water submersion test. The measurements shall be taken between eachcable and the electrode.4.4.3 Interpretation of Result. The leakage current measured shall not exceed 5 A at (14 0.5) V appliedvoltage.Table 3: Splice ConfigurationsTube lengthin mm Spl
37、ice configurationWire sizein mm2Wire lengthin mmTest configuration 1 50 2:2 0.5 250Test configuration 2 65 7:4 1.5 250GM EUROPE ENGINEERING STANDARDS SUPERCEDED GME15491 Copyright 2014 General Motors Company All Rights ReservedIssue No. 2 May 2014 Page 7 of 16Figure 1: Splice InstallationA = Install
38、ed sleeve4.5 Short Term Ageing.4.5.1 Test Samples. For none sealed products, prepare three test samples according to paragraph 4.3. Forsealed products, prepare three test samples according to paragraph 4.4.4.5.2 Apparatus. Perform the short-term ageing test using an oven at the appropriate temperatu
39、re as specifiedin Table 1.4.5.3 Procedure. Place the samples, in a vertically orientation, in a hot oven for 240 h. The samples shall beseparated by 50 mm from each other and from the inner surface of the oven. Tubes made of different materialsshall not be tested at the same oven. Immediately after
40、ageing, withdraw the samples and maintain them at(+23 5) C for at least 16 h. After ageing, perform tensile strength and elongation, see paragraph 4.3. For nonsealed products and for sealed products, see paragraph 4.4.4.5.4 Interpretation of Results. See Appendix B.4.6 Long Term Ageing.4.6.1 Test Sa
41、mples. For none sealed products, prepare three test samples as in paragraph 4.3. For sealedproducts, prepare three test samples according to paragraph 4.4.4.6.2 Apparatus. Perform the long-term ageing test using an oven at the appropriate temperature as specifiedin Table 1.4.6.3 Procedure. Place the
42、 samples, in a vertically orientation, in a hot oven for 3000 h. The samples shall beseparated by 50 mm from each other and from the inner surface of the oven. Tubes made of different materialsshall not be tested at the same oven. Immediately after ageing, withdraw the samples and maintain them at(+
43、23 5) C for at least 16 h. After ageing, perform tensile strength and elongation according to paragraph 4.3for non sealed products and according to paragraph 4.4 for sealed products.4.6.4 Interpretation of Results. See Appendix B.4.7 Abrasion Resistance.4.7.1 Test Samples. A tube, which has a length
44、 of 200 mm, shall be shrunk onto a mandrel. The mandrel shallbe manufactured from a solid steel rod. The size of the mandrel shall represent the fully shrunk internal diameterof the shrink tube. Type testing shall be performed on (6.4 / 3.2) mm sample or nearest equivalent (seeAppendix A, Table 8).4
45、.7.2 Apparatus / Procedure. The equipment, see ISO 6722, shall be provided with a counter recording thenumbers of cycles to failure and shall stop when the needle abrades through the insulation and makes contactwith the mandrel.The test rig shall fulfill the following requirements:x Diameter of need
46、le: (0.45 0.01) mm.x Type of needle: spring wire according to ISO 6931-1.x Frequency: (55 5) cycles/minute (one cycle consist of one reciprocating movement).GM EUROPE ENGINEERING STANDARDS SUPERCEDED GME15491 Copyright 2014 General Motors Company All Rights ReservedIssue No. 2 May 2014 Page 8 of 16x
47、 Length of abrasion: (15 1) mm.x Type of movement: design details shall not influence the test result.x Position of weight, design details, mass; the vertical force on the test piece shall be constant under dynamicconditions.x The test sample shall not move during test. If fixing is necessary, the l
48、ongitudinal force applied on theconductor shall not exceed 100 N/mm2.x Stability of equipment; the equipment shall be so stable that the results will not be affected.The number of cycles shall be determined by four measurements at a test temperature of (+23 5) C. Aftereach reading, the sample shall
49、be moved 20 mm and rotated clockwise 90. The needle shall be changed aftereach reading.The static load applied on the test sample shall be (7 0.05) N.4.7.3 Interpretation of Results. The test piece shall withstand the number of cycles find in Appendix B, withoutbeing cut through.4.8 Cold Impact.4.8.1 Test Samples. Non Sealed Shrink Tube. 50 mm length. The tube shall be shrunk onto a mandrel, whichshall be manufactured from a solid steel rod.4.8.2 Test Samples. Sealed Shrink Tub
