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1、 ENGINEERING STANDARDS Material Specification General GM1502M Windshield Washer Tubing 1 Scope This specification covers non-reinforced flexible tubing intended primarily for use as fluid lines for automotive windshield washer systems conform- ing to the requirements of Federal Motor Vehicle Safety
2、Standard (MVSS) 104 and SAE Recom- mended Practice J942. 1.1 Material Description. 1.1.1 Construction. The tubing shall be made from 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 Dimens
3、ions and Tolerances. Tubing furnished to this specification shall conform to the dimensions and tolerances shown in Table 1. Table 1: Dimensions and Tolerances Table 1A Metric (SI) Units Table 1B Customary Units Inside Diameter (mm) Outside Diameter (mm) Inside Diameter (inch) Outside Diameter (inch
4、) Size (mm) max min max min Wall Thickness (mm) min Size (inch) max min max min 3.96 4.36 3.56 9.94 8.34 - 5/32 .2019 .1407 .3907 .3282 4.0 4.50 3.50 8.20 6.60 1.50 - - - - - 5.56 5.96 5.16 11.51 9.91 - 7/32 .2344 .2032 .4532 .3907 6.35 6.75 5.95 12.31 10.71 - 1/4 .2656 .2344 .4844 .4531 2 Reference
5、s Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D380 SAE J942 ASTM D573 2.2 GM Standards/Specifications 9981293 GM4486P 9984170 GMW3001 9984198 GMW3059 9985670 2.3 Additional References. Federal Motor Vehicle Safety St
6、andard MVSS 104 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 3.2. 3.1.1 Hardness, Shore A Durometer65 to 75 3.1.2 Tensile Strength, MPa min6.90 3.1.3 Compression Set (22 h at 70C), & max.25 3.1.4 Resista
7、nce to Heating Aging (70 h at 120C) Hardness Increase, pts, max10 Tensile Decrease, %, max25 Elongation Decrease, %, max45 3.1.5 Burst Strength, MPa, min0.70 Copyright 2004General Motors Corporation All Rights Reserved August 2004 Originating Department: North American Engineering Standards Page 1 o
8、f 3 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 22:58:22 MDTNo reproduction or networking permitted without license from IHS -,-,- GM1502M GM ENGINEERING STANDARDS 3.1.6 Bend Test (OD Colla
9、pse) %, max, (See Note)10 3.1.7 Vacuum Test (OD Collapse), %, max (See Note)30 3.1.8 Cold Flexibility (-29C), Induced Defects (See Note)Nil 3.1.9 Stress Aging (120C), Induced De- fectsNil 3.1.10 Ozone Resistance, ASTM Rating0 3.1.11 Staining Characteristics.Nil 3.1.12 Where application requires non-
10、 conductance of electricity and static, maximum allowable volume resistivity (ohm-meter) and test method may be specified by purchaser. 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, a
11、ll tests shall be performed according to methods outlined in ASTM D380. 3.2.1 Burst Strength. Test per ASTM D380, Hydrostatic Test. 3.2.2 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 over the ma
12、ndrel (OD2). Calculate the OD collapse as follows: OD Collapse = 1 21 OD ODOD x 100 = _% 3.2.3 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. Measure the outsi
13、de 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: OD Collap
14、se = 1 21 OD ODOD x 100 = _% 3.2.4 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 10 times the nominal OD of the tubing. Visu- ally inspect tubing for fracture
15、s, cracks or other indications of induced defects. 3.2.5 Stress Aging. Assemble samples of tub- ing on nipples as shown in Figure 1. Subject assemblies to oven aging at 120C for 70 h (see ASTM D573 for oven requirements). After aging, visually examine tubing for cracks, breaks or other detrimental e
16、ffects induced by the aging. Figure 1: Stress Aging 3.2.6 Ozone Resistance. Subject samples of tubing to test outlined in GM4486P (using a 250 mm long specimen, a mandrel with a di- ameter of 8 times the nominal OD of the tubing, and ozone concentration of 100 pphm for 70 h unless otherwise specifie
17、d by purchaser). 3.2.7 Nonstaining Extractables. Immerse a 20g sample of tubing in 200 mL of a 40/60 (vol) Copyright 2004 General Motors Corporation All Rights Reserved Page 2 of 3 August 2004 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111
18、001, User=Japan, IHS Not for Resale, 06/23/2008 22:58:22 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS GM1502M mixture of distilled water and GM Windshield Washer Fluid, 9985670, or 60% Methyl Alcohol in water using part number 10120763. Reflux at
19、 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 material (see Note). Air dry at room temperature for 24 h and examine. There shall be no staining o
20、f 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, 9981293, in place of Windshield Washer Fluid, 9985670, per ex- port washer fluid requirements. N
21、ote: 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 automotive type white vinyl. 3.2.7.1 Heated Wash Immerse a 20g sample of tubing in 200 mL of a 40/60
22、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 to 85 2C. Place five drops of the 85 2C solu- tion on a paint test panel (see Note) and five drops
23、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 water and soft cloth. Re- port any staining with written description and photographs. Repeat the te
24、st 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 9984198 or 9984170 not less than five days and no more than 90 days prior to the staining test. Top
25、 mate- rial shall be automotive type white vinyl. 4 Manufacturing Process Not applicable. 5 Rules and Regulations Copyright 2004 General Motors Corporation All Rights Reserved 5.1 All materials supplied to this specification must comply with the requirements of GMW3001, Rules and Regulations for Mat
26、e- 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 have been ap
27、proved 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 engineering. There sha
28、ll 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 con- formance
29、 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 listed in the GM M
30、aterial File under this specifi- cation number have been qualified by engineer- ing as meeting the requirements of this specifi- cation. 7 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: GM1502M 8 Release and Revisions 8.1 Releas
31、e. This standard was first issued in July 1955 by BOC-Flint. 8.2 Revisions. Rev Approval Date Description (Organization) C APR 1989 Editorial revision (GMNA) D APR 2004 Editorial revision, heated wash content added. (GMNA) Page 3 of 3 August 2004 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 22:58:22 MDTNo reproduction or networking permitted without license from IHS -,-,-
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