1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 01 2017 02 27 Revised See summary of revisions A. Reaume/G. Kowalsk, NA 1999 06 25 Activated C. Thomas, NA Controlled document at www.MATS Copyright 2017, Ford ; Global Technologies, LLC Page 1 of 5 HOSE, REINFORCED RUBBER, FUEL RESISTAN
2、T, WSS-M96D33-A12 CONDUCTIVE, LOW PERMEATING, NBR OR HNBR TUBE/THV OR CPT/NBR/BARRIER/CM 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
3、inner layer of NBR or HNBR tube, a barrier layer such as THV or CPT, an NBR layer, a reinforcement layer, and a CM cover. Reinforcement contains one or more plies of braided, knit, or spiral woven para-aramid fabric. 2. APPLICATION This specification was released originally for liquid carrying fuel
4、line hoses. Vapor management applications may be non-conductive but fill and fill 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 th
5、is specification is listed on the drawing, CAD file, or other documents. The list 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 pr
6、ior to testing in a controlled environment of 23 +/- 2 C and 50 +/- 5% relative humidity. 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
7、 constitute the reference standard and shall be kept on file at the designated material 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
8、conditions. 3.4 INITIAL QUALIFICATION Suppliers seeking approval to this specification 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)
9、. 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 UV stabilizers. 3.6 HOSE
10、CONSTRUCTION ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A12 Copyright 2017, Ford Global Technologies, LLC Page 2 of 5 The hose shall consist of a smooth bore, electrically conductive inner layer of NBR or HNBR tube, a barrier layer such as THV or CPT, an NBR layer, a reinforcement layer, and a CM
11、 cover. Reinforcement contains one or more plies of braided, knit, or spiral woven para-aramid fabric. 3.7 ADDITIONAL REQUIREMENTS Requirements beyond those explicitly stated in this document and the material specification may be specified on the Engineering drawing, Engineering specification (ES),
12、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 polymeric materials performance standard: WSS-M98P14-A2 Complete Construction 3.8.1 Burst P
13、ressure (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 100 C, 25% compression) 3.8.3 Electrical Resistance Surface resistivity (SAE J2260) less than or equal to 1
14、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 on the finished part. No diameter shall decrease by more than 20 % during the applicati
15、on 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: Complete Construction Nominal hose ID 19.0 mm 10 kPa 20 % max 3.8.5 Ovality 75 % min (Not applicable to hoses with I.D. greater than 16.28 mm, un
16、less otherwise specified on engineering drawing) Ovality = I.D. minimum x 100 I.D. maximum 3.8.6 Resistance to Kinking Ball must pass freely ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A12 Copyright 2017, Ford Global Technologies, LLC Page 3 of 5 (SAE J30, para 6.20) 3.8.7 Flammability Resistance,
17、 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 determined between Purchasing and the supplier. The word gas/fuel and the coding described b
18、elow 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 identification code. b) Date of manufacture (week, year) and plant designation if supplier
19、 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 be clearly and legibly printed letters of 4.5 - 6 mm in height and width. When hose i
20、s 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) 3.9 PERFORMANCE CRITERIA REPORT ONLY Materials approved to this specification must also
21、 be approved to the fuel system polymeric materials performance standard: WSS-M98P14-A2 Tube Barrier Cover 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: Recor
22、d the I.D. and O.D. of a 150 mm straight length of hose and clamp the hose on suitable fittings in a tensile 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 b
23、reak the hose and the elongation of the hose at break. Calculate the hose breaking strength by dividing the 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,
24、% ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A12 Copyright 2017, Ford Global Technologies, LLC Page 4 of 5 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineeri
25、ng 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 Engineering. The supplier shall submit a completed copy of their laboratory test reports, si
26、gned 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 upon request and kept for a minimum of one year. Upon request, the supplier will review
27、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 characteristics to the material upon which approval was originally granted. Prior to maki
28、ng 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 Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (w
29、ith 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 Design Verification (DV), Production Verification (PV) and Production Part Approval Proces
30、s (PPAP) sign off must be kept until Job 1. 4.3 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions 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-M99P999
31、9-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuing 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
32、 added those requirements directly to this specification. o Para 3.1 approved sources o Para 4.3 Added restricted substance management standard Para 3.5 Added limitations Para 3.6 Added hose construction Para 3.7 Added additional requirements Para 3.9 Added performance criteria report only Para 5. A
33、dded summary of revisions The following paragraphs are covered in WSS-M98P14-A2 Para 3.8 Removed adhesion Para 3.9 Removed ozone resistance Para 3.10 Removed high temperature resistance ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A12 Copyright 2017, Ford Global Technologies, LLC Page 5 of 5 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
