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1、 ENGINEERING STANDARDS Material Specification General GM1511M Windshield Washer Tubing Dynamic Wet Arm 1 Scope This specification covers non-reinforced flexible tubing intended primarily for use as fluid Lines for automotive dynamic wet wipe windshield washer systems where the fluid tubing is part o
2、f the movable wiper arm. These systems conform to the requirements of MVSS 104 (Federal Mo- tor Vehicle Safety Standard) and SAE J942. 1.1 Material Description. This specification is based on the SAE line call-out: SAE J2OOM4CA714A25B35EA14F18G21P2. 1.1.1 Construction. The tubing shall be made from
3、EPDM (ethylene propylene diene mono- mer) or TPE (Thermo Plastic Elastomer) com- pounds. Color shall be black. Inside and outside surfaces shall be smooth. 1.1.2 Dimensions and Tolerances. Unless other wise specified on the engineering drawing, the inside diameter of the tubing covered by this speci
4、fication is 3.0 0.3 mm with a correspond- ing outside diameter of 4.9 + 0 mm - 0.6 mm. Tolerances on length (coil, reel or cut length) shall be as specified in SAE J50A, Windshield Wiper Hose. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 Extern
5、al Standards/Specifications. ASTM D380 ASTM D925 ASTM D395 ASTM D2137 ASTM D412 ASTM D2240 ASTM D471 SAE J50A ASTM D573 SAE J942 ASTM D624 2.2 GM Standards/Specifications 9981293 GM4486P 9984170 GMW3001 9984198 GMW3059 9985670 2.3 Additional References. Federal Motor Vehicle Safety Standard MVSS 104
6、 2.3.1 GM Part number 10120763 3 Requirements 3.1 Properties. Tubing shall conform to the following properties when tested by methods shown in Section 6. 3.1.1 Hardness, Shore A Durometer.70 to 75 3.1.2 Tensile Strength, MPa min14 3.1.3 Ultimate Elongation, 96 min.200 3.1.4 Compression Set (22 h at
7、125C),%, max 70 3.1.5 Resistance to Heating Aging (70 h at 125C) Hardness Increase, pts, max.10 Tensile Decrease,%, max .20 Elongation Decrease,%, max40 3.1.6 Burst Strength, MPa min 0.70 3.1.7 Tear Resistance, W/m min26 3.1.8 Bend Test (OD Collapse),%, max (see Note)10 3.1.9 Vacuum Test (OD Collaps
8、e),%, max (see Note)30 3.1.10 Cold Flexibility, Induced Defects (see Note).Nil 3.1.11 Stress Aging, Induced DefectsNil 3.1.12 Ozone Resistance, ASTM Rating0 3.1.13 Water Resistance,%,volume change, max 5 3.1.14 Staining Characteristics.Nil 3.1.15 Nonstaining Extractables.Nil 3.1.16 Where application
9、 requites non- conductance of electricity and static, maximum allowable volume resistivity (ohm- meter) and test method may be specified by purchaser. 3.1.17 Low Temperature Resistance, Brittleness. Nil Copyright 2004 General Motors Corporation All Rights Reserved August 2004 Originating Department:
10、 North American Engineering Standards Page 1 of 4 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:36:47 MDTNo reproduction or networking permitted without license from IHS -,-,- GM1511M GM E
11、NGINEERING STANDARDS Note: These requirements shall be met by tub- ing after aging at 125C for 70 h, as well as in the as-received condition. 3.2 Test Methods. Except as stated below, all tests shall be performed according to methods outlined in ASTM D380. Suitable precautions should be taken to ens
12、ure that applicable safe limits are not exceeded when conducting test procedures, processes and/or handling the ma- terials required by this specification. 3.2.1 Hardness. Test per ASTM D2240, Shore A. 3.2.2 Tensile and Elongation. Test per ASTM D412, Die C. 3.2.3 Compression Set. Test per ASTM D395
13、, Method B, using plied samples. 3.2.4 Burst Strength. Test per ASTM D380, Hydrostatic Test. 3.2.5 Tear Resistance. Test per ASTM D624, Die C. 3.2.6 Bend Test. Bend 300 mm long sample 90 degrees over a 40 mm diameter mandrel. Re- cord the average original OD (OD ) and the minimum flattened diameter
14、over the mandrel (OD2). Calculate the OD Collapse as follows: OD Collapse = 1 21 OD ODOD x 100 = _% 3.2.7 Vacuum Collapse. Assemble a 300 mm sample of tubing with suitable end fittings such that one end may be completely sealed against air leakage and the other end connected to a vacuum pump. Measur
15、e the outside diameter (OD1) of the test specimen and subject the as- sembly to a vacuum of 88 kPa below atmos- pheric pressure for 5 minutes. Again measure the outside diameter while the tubing is under vacuum (OD2). Record the minimum diameter at any cross section. Calculate OD Collapse as follows
16、: OD Collapse = 1 21 OD ODOD x 100 = _% 3.2.8 Cold Test. Condition samples of tubing in a cold box in a straight position at -30C for 5 h. Without removal from the cold box, bend tubing 180 degrees around a mandrel having a diame- ter ten times the nominal OD of the tubing. Visu- ally inspect tubing
17、 for fractures, cracks or other indications of induced defects. 3.2.9 Stress Aging. Assemble samples of tub- ing on nipples as shown in Figure 1. Subject assemblies to oven aging at 125C for 70 h (see ASTM D573 for oven requirements). After aging, visually examine tubing for cracks, breaks or other
18、detrimental effects induced by the aging. Figure 1:Stress Aging Copyright 2004 General Motors Corporation All Rights Reserved Page 2 of 4 August 2004 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/
19、2008 23:36:47 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS GM1511M Copyright 2004 General Motors Corporation All Rights Reserved August 2004 Page 3 of 4 3.2.10 Ozone Resistance. Subject samples of tubing to test outlined in GM4486P (using a 250 m
20、m long specimen, a mandrel with a diameter of 8 times the nominal OD of the tubing, and ozone concentration of 100 pphm for 70 h unless otherwise specified by purchaser). 3.2.11 Nonstaining Extractables. Immerse a 20g sample of tubing in 200 mL of a 40/60 (vol) mixture of distilled water and GM Wind
21、shield Washer Fluid, 9985670, or 60% Methyl Alcohol in water using part number 10120763. Reflux at boiling point for 24 h. Record boiling tempera- ture. Cool 1 h at room temperature to 20 - 25C. Place five drops of the solution on a paint test panel (see Note) and five drops on automobile body top m
22、aterial (see Note). Air dry at room temperature for 24 h and examine. There shall be no staining of the paint or the top material that cannot be removed by normal cleaning with water and soft cloth. Report any staining with written description and photographs. Repeat the test using Isopropyl Alcohol
23、, 9981293, in place of Windshield Washer Fluid, 9985670, per ex- port washer fluid requirements. Note: Paint panel shall be painted with a white base coat/clear coat system per 9984198 or 9984170 not less than five days and no more than 90 days prior to the staining test. Top mate- rial shall be aut
24、omotive type white vinyl. 3.2.12 Heated Wash. Immerse a 20g sample of tubing in 200 mL of a 40/60 volume mixture of distilled water and GM Windshield Washer Fluid, 9985670, or 60% Methyl Alcohol in water using part number 10120763. Reflux at boiling point for 24 h. Record boiling temperature. Cool t
25、o 85 2C. Place five drops of the 85 2C solu- tion on a paint test panel (see Note) and five drops on automobile body top material (see Note). Air dry at room temperature for 24 h and examine. There shall be no staining of the paint or the top material that cannot be removed by normal cleaning with w
26、ater and soft cloth. Re- port any staining with written description and photographs. Repeat the test using Isopropyl Alcohol, 9981293, in place of Windshield Washer Fluid, 9985670, per export washer fluid requirements. Note: Paint panel shall be painted with a white base coat/clear coat system per 9
27、984198 or 9984170 not less than five days and no more than 90 days prior to the staining test. Top mate- rial shall be automotive type white vinyl. 3.2.13 Low Temperature Resistance. Test per ASTM D2137, Method A, paragraph 9.3.2, 3 minutes at -50C. 3.2.14 Water Resistance. Test per ASTM D471, 70 h
28、at 100C. 3.2.15 Staining. Test per ASTM D925, Method B, except use white base coat/clear coat system per 9984170 or 9984198. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 All materials supplied to this specification must comply with the requirements of GMW3001, Rules and Regula
29、tions for Mate- rial Specifications. 5.2 All materials supplied to this specification must comply with the requirements of GMW3059, Restricted and Reportable Sub- stances for Parts. 5.3 Initial Source Approval. No shipment shall be made by any supplier until representative initial production samples
30、 have been approved by engineering as meeting the requirements of this specification. 5.4 Inspection And Rejection. All shipments of material or parts under contract or purchase order manufactured to this specification shall be equivalent in every respect to the initial samples approved by engineeri
31、ng. There shall be no changes in either formulation or manufacturing processes permitted without prior notification and approval by engineering. Lack of notification by the supplier constitutes grounds for rejection of any shipment. While samples may be taken from incoming shipments and checked for
32、con- formance to this specification, the supplier shall accept the responsibility for incoming shipments meeting this specification without dependence upon purchasers inspection. 6 Approved Sources Engineering qualification of an approved source is required for this specification. Only sources liste
33、d in the GM Material File under this specifi- cation number have been qualified by engineer- ing as meeting the requirements of this specifi- cation. Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/
34、2008 23:36:47 MDTNo reproduction or networking permitted without license from IHS -,-,- GM1511M GM ENGINEERING STANDARDS Copyright 2004 General Motors Corporation All Rights Reserved Page 4 of 4 August 2004 7 Coding System This material specification shall be referenced in other documents, drawings,
35、 VTS, CTS, etc. as follows: GM1511M 8 Release and Revisions 8.1 Release. This standard was issued in April 1988. 8.2 Revisions. Rev Approval Date Description (Organization) B SEP 1994 Editorial (GMNA) C APR 2004 Editorial revision and heated wash content added (GMNA) Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:36:47 MDTNo reproduction or networking permitted without license from IHS -,-,-