1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 03 2017 02 27 Revised See summary of revisions A. Reaume/G. Kowalski, NA 2006 09 13 Revised Inserted 3.0; Deleted 3.1,3.2,3.3,3.26, Fixed numbering in 3.12 1997 08 18 Activated J. Spencer Controlled document at www.MATS Copyright 2017, F
2、ord ; Global Technologies, LLC Page 1 of 5 HOSE, REINFORCED RUBBER, REFORMULATED WSS-M96D33-A8 FUEL RESISTANT, LOW PERMEATING, CONDUCTIVE NBR TUBE/THV/(NBR/PVC) COVER 1. SCOPE This specification defines a conductive, reinforced barrier layer rubber hose with good resistance to reformulated fuel blen
3、ds and low permeation. 2. APPLICATION This specification was released originally hoses used for fuel tank filler and vent hoses. 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 use
4、d when this 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 tha
5、n 24 h prior 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 appro
6、val shall 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
7、the same 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 Meth
8、ods (DVM). 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.
9、ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A8 Copyright 2017, Ford Global Technologies, LLC Page 2 of 5 3.6 HOSE CONSTRUCTION The hose shall consist of an inner tube of nitrile (NBR), a middle layer of tetrafluoroethylene hexafluoropropylene vinylidene fluoride (THV), acting as a fuel barrier, a
10、second layer of NBR, one ply of braided, knit, or spiral woven fabric, and nitrile/polyvinyl chloride (NBR/PVC) cover. 3.7 ADDITIONAL REQUIREMENTS Requirements beyond those explicitly stated in this document and the material specification may be specified on the Engineering drawing, Engineering spec
11、ification (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 polymeric materials performance standard: WSS-M98P14-A2 Tube Veneer/Barrier
12、 Cover 3.8.1 Hardness Durometer A 63 75 N/A 60 70 (ISO 868/ASTM D2240 Instantaneous, plied up Specimen. Hand held Durometers shall not be used) 3.8.2 Hardness Durometer D N/A 51 61 N/A (ISO 868/ASTM D2240) 3.8.3 Tensile Strength, MPa min 6.9 12.0 5.5 (ISO 37/ASTM D412, Die C) 3.8.4 Elongation at Bre
13、ak, % min 200 300 200 (ISO 37/ASTM D412, Die C) 3.8.5 Compression Set,% max 90 N/A 45 (FLTM BP 108-6, 22 h at 82 C, 25% compression) 3.8.6 Burst Pressure (ASTM D380) Complete Construction Hose Size, (Approximate I.D.) Below 9.53, mm 1.02 MPa min 9.53 15.87, mm 0.68 MPa min 15.87 mm and larger 0.34 M
14、Pa min 3.8.7 Electrical Resistance Surface resistivity (SAE J2260) less than or equal to 1 x 106 Ohms ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A8 Copyright 2017, Ford Global Technologies, LLC Page 3 of 5 3.8.8 Vacuum Collapse Complete Construction (SAE J30R11) Test Method: For straight hose, a
15、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 application of vacuum for a minimum of 15 seconds and not more than 60 seconds. Hose size
16、s as listed below shall be subjected to the corresponding vacuum pressure: Nominal hose ID 44.5 mm 10 kPa 20 % max 3.8.9 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 3.8.10 Resis
17、tance to Kinking Ball must pass freely (SAE J30, para 6.5.11) 3.8.11 Flammability Resistance, Cover Stock Only Self- extinguishing (ISO 3795) within 60 seconds 3.8.12 Hose Identification The colored tracer cord in the reinforcement of the hose may be used for source identification. The color shall b
18、e determined 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) Suppl
19、ier identification 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 printi
20、ng shall 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. ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A8 Copyright 2017, Ford Global Technologies, LLC Page 4 of 5 The following code format is recom
21、mended, 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 be approved to the fuel system polymeric materials performance standard: WSS-M98P14-A2 Tube Veneer
22、/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: Record the I.D. and O.D. of a 150 mm straight length of hose and clamp the hose on suitable fitti
23、ngs 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 break the hose and the elongation of the hose at break. Calculate the hose breaking strength
24、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, MPa, min Report 3.9.2.2 Elongation at Break, %, min Report 4. GENERAL INFORMATION The information given below is provided for clarification
25、 and assistance in meeting 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 Developme
26、nt, and Materials Engineering. 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
27、 available for review upon 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
28、be equivalent in all characteristics 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 EN
29、GINEERING MATERIAL SPECIFICATION WSS-M96D33-A8 Copyright 2017, Ford Global Technologies, LLC Page 5 of 5 Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approva
30、l, 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 Process (PPAP) sign off must be kept until Job 1. 4.3 RESTRICTED SUBSTANCE MANAGEMENT STA
31、NDARD 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-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with thi
32、s standard on a continuing basis through IMDS and or GMAP reporting. 4.4 GENERIC IDENTIFICATION AND MARKING OF ELASTOMERIC PRODUCTS (ISO 1043/11469) NBR/THV/NBR/PVC 5. SUMMARY OF REVISIONS 2017 02 27 Removed WSS-M99P1111-A and added those requirements directly to this specification. o Para 3.1 Appro
33、ved sources o Para 3.2 Conditioning and test conditions o Para 3.3 Infrared spectrophotometry and/or thermal analysis o Para 4.1 Approval of materials o Para 4.2 Suppliers ongoing responsibility o Para 4.3 Restricted substance management standard Para 3.4 Added initial qualifications Para 3.5 Added
34、limitations Para 3.7 Added additional requirements- ES, SDS, ARL Para 3.9 Added performance criteria report only Para 3.9.2 Added original breaking strength and elongation at break Para 4.4 Added generic identification and marking of elastomeric products The following paragraphs are covered in WSS-M
35、98P14-A2 Para 3.7 Removed heat aged (1000 hours) Para 3.8 Removed immersion in fuel C 24 hours, cover only Para 3.9 Removed immersion in fuel C 360 hours, tube only Pare 3.10 Removed immersion in Fuel C + 15% Methanol 24 hours, cover only Pare 3.11 Removed immersion in Fuel C + 15% Methanol 360 hour
36、s, tube only Para 3.12 Removed immersion in Fuel C + 15% MTBE 24 hours, tube only Para 3.13 Removed ozone resistance Para 3.16 Removed cold flexibility Para 3.19 Removed fuel permeability resistance, 85% fuel C/15% Methanol Para 3.20 Removed adhesion Para 3.22 Removed installation effort Para 3.23 Removed hose elongation 2006 09 13 Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.26, Fixed numbering in 3.12 1998 04 03 Revised 3.8 3.12 and 3.20
