1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 2 2017 02 27 Revised See summary of revisions A. Reaume/G. Kowalski, NA 1999 06 25 Activated C. Thomas, NA Controlled document at www.MATS Copyright 2017, Ford ; Global Technologies, LLC Page 1 of 5 HOSE, NON-REINFORCED RUBBER, FUEL RESI
2、STANT, WSS-M96D33-A9 CONDUCTIVE, LOW PERMEATING, NBR TUBE/THV/NBR/CSM COVER 1. SCOPE This specification defines a conductive, non-reinforce multi-layer composite hose with enhanced low permeation and good resistance to fuel blends containing methanol. The hose shall consist of an inner layer of NBR
3、or HNBR, a THV barrier layer, an NBR layer and a CSM cover. 2. APPLICATION This specification was released originally for fuel tank vent hoses and for vapor management hoses. These constructions are not for fuel line applications. Vapor management applications may be non-conductive but fill and fill
4、 vent applications must be conductive. 3. REQUIREMENTS 3.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources identified on the Ford Approved Source List (ASL) can be used when this specification is listed on the drawing, CAD file, or other documents. The list
5、 of approved sources is located within Ford at or available externally through a Ford Materials Engineer. 3.2 CONDITIONING AND TEST CONDITIONS All test values are based on material conditioned for not less than 24 h prior to testing in a controlled environment of 23 +/- 2 C and 50 +/- 5% relative h
6、umidity. Testing of the material should occur in the conditioning environment or soon after removal. 3.3 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms from initial material approval shall constitute the reference standard and shall be kept on file at the designated ma
7、terial laboratory. The material supplier shall ensure that all future material supplied to the specification shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.4 INITIAL QUALIFICATION Suppliers seeking approval to this specific
8、ation must meet the initial qualification processes that include evaluating materials and constructions according to the applicable Fuel System Design Specification (SDS) and individual Design Verification Methods (DVM). ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9 Copyright 2017, Ford Global Te
9、chnologies, LLC Page 2 of 5 3.5 LIMITATIONS Vapor lines can be either conductive or non-conductive. Liquid caring lines must be conductive. This material does not contain UV stabilizers, long term exposure to direct sunlight will cause cracking. All components exposed to direct sunlight must contain
10、 UV stabilizers. 3.6 HOSE CONSTRUCTION The hose shall consist of a smooth bore, electrically conductive inner layer of NBR or, HNBR , a THV barrier layer, an NBR layer and an CSM cover. 3.7 ADDITIONAL REQUIREMENTS Requirements beyond those explicitly stated in this document and the material specific
11、ation may be specified on the Engineering drawing, Engineering specification (ES), performance specification, System Design Specification (SDS) and/or Attribute Requirement List (ARL). 3.8 PERFORMANCE CRITERIA Materials approved to this specification must also be approved to the fuel system polymeri
12、c materials performance standard: WSS-M98P14-A2/A6 Complete Construction 3.8.1 Burst Pressure (ASTM D380) Hose Size, (Approximate I.D.) Below 9.53 mm 1.0 MPa min 9.53 15.87 mm 0.68 MPa min 15.87 mm and larger 0.34 MPa min 3.8.2 Compression Set 75 %, max (FLTM BP 108-6, 70 h at 100oC, 25% compression
13、) 3.8.3 Electrical Resistance Surface resistivity (SAE J2260) less than or equal to 1 x 106 Ohms 3.8.4 Vacuum Collapse (SAE J30R11) Test Method: For straight hose, a 1 m length of hose or the assembly shall be held in a straight line. On preformed parts, the vacuum collapse test shall be performed o
14、n the finished part. No diameter shall decrease by more than 20 % during the application of vacuum for a minimum of 15 seconds and not more than 60 seconds. Hose sizes as listed below shall be subjected to the corresponding vacuum pressure: Nominal hose ID 19.0 mm 10 kPa 20 % max ENGINEERING MATERIA
15、L SPECIFICATION WSS-M96D33-A9 Copyright 2017, Ford Global Technologies, LLC Page 3 of 5 Complete Construction 3.8.5 Ovality 75 %, min (Not applicable to hoses with I.D. greater than 16.28 mm, unless otherwise specified on engineering drawing) Ovality = I.D. minimum x 100 I.D. maximum 3.8.6 Resistanc
16、e to Kinking Ball must pass freely (SAE J30, para 6.20) 3.8.7 Flammability Resistance, Cover Stock Only Self- extinguishing (ISO 3795) within 60 seconds 3.8.8 Hose Identification The colored tracer cord in the reinforcement of the hose may be used for source identification. The color shall be determ
17、ined between Purchasing and the supplier. The word gas/fuel and the coding described below shall appear on the outer cover of the hose in contrasting color and repeated at intervals of 60 mm or less. Mandrel cured hose may be coded once per part. The following format is recommended: a) Supplier iden
18、tification code. b) Date of manufacture (week, year) and plant designation if supplier has more than one plant producing hoses to this specification. No space between letters. Mandatory on hoses longer than 80 mm only. c) Ford trademark on hoses longer than 150 mm. d) All of the above printing shall
19、 be clearly and legibly printed letters of 4.5 - 6 mm in height and width. When hose is less than 80 mm long, width of letters may be reduced to 3 mm. The following code format is recommended, but not mandatory: G 2 01 Where: G = Plant Designation 2 = Year (single digit) 01 = Week (2-digit number) E
20、NGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9 Copyright 2017, Ford Global Technologies, LLC Page 4 of 5 3.9 PERFORMANCE CRITERIA REPORT ONLY Materials approved to this specification must also be approved to the fuel system polymeric materials performance standard: WSS-M98P14-A2 Tube Barrier Cover
21、3.9.1 Hardness International Report Report Report (ISO 48/ASTM D1415, micro) 3.9.2 Original Breaking Strength and elongation at Break (Entire Hose Construction, 50 mm/minute) Test Method: Record the I.D. and O.D. of a 150 mm straight length of hose and clamp the hose on suitable fittings in a tensil
22、e testing machine to prevent pull-off. Apply gage marks or extensometers to the hose to measure elongation. Apply a load at a rate of 50 mm/minute until the hose ruptures. Record the force to break the hose and the elongation of the hose at break. Calculate the hose breaking strength by dividing the
23、 breaking force by the annular cross-sectional area of the hose wall. Median values are to be used for reported values 3.9.2.1 Breaking Strength Report, MPa 3.9.2.2 Elongation at Break Report, % 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meetin
24、g the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, and Materials Enginee
25、ring. The supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of the Material Specification. Tested material samples must be available for review upo
26、n request and kept for a minimum of one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and Effects Analysis, Control Plans, Certification testing) with Ford. 4.2 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in all char
27、acteristics to the material upon which approval was originally granted. Prior to making any changes to the material originally approved, whether or not such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplier Technical Assistan
28、ce (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for Desig
29、n Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9 Copyright 2017, Ford Global Technologies, LLC Page 5 of 5 4.3 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restricti
30、ons imposed by regulations or Company direction applies to the materials addressed by this document. The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuin
31、g basis through IMDS and or GMAP reporting. 4.4 GENERIC IDENTIFICATION AND MARKING OF ELASTOMERIC PRODUCTS (ISO 1043/11469) Report 5. SUMMARY OF REVISIONS 2017 02 27 Removed WSS-M99P1111-A and added those requirements directly to this specification. o Para 3.1 approved sources o Para 4.3 Added restr
32、icted substance management standard Para 3.5 Added limitations Para 3.9 Added hose construction Para 3.7 Added additional requirements Para 3.9 Added performance criteria report only Para 5. Added summary of revisions The following paragraphs are covered in WSS-M98P14-A2 Para 3.8 Removed adhesion Pa
33、ra 3.9 Removed ozone resistance Para 3.10 Removed high temperature resistance Para 3.11 Removed sequential fuel soak Para 3.12 Removed fuel permeability resistance 85% fuel C/15% methanol Para 3.14 Removed cold flexibility Para 3.15 Removed leak test after applied strain Para 3.21 Removed installation effort Para 3.24 Removed hose elongation
