1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Revisions1999 06 25 Activated C. ThomasPage 1 of 12HOSE, NON-REINFORCED RUBBER, FUEL RESISTANT WSS-M96D33-A9CONDUCTIVE, LOW PERMEATING (NBR/THV/NBR/CSM)HOSE, REINFORCED RUBBER, FUEL RESISTANT WSS-M96D33-A10CONDUCTIVE, L
2、OW PERMEATING (NBR/THV/NBR/CSM)HOSE, NON-REINFORCED RUBBER, FUEL RESISTANT, WSS-M96D33-A11CONDUCTIVE, LOW PERMEATING (NBR/THV/NBR/CM)HOSE, REINFORCED RUBBER, FUEL RESISTANT, WSS-M96D33-A12CONDUCTIVE, LOW PERMEATING (NBR/THV/NBR/CM)1. SCOPEThese specifications define multi-layer composite, enhanced e
3、vaporative,elastomeric hoses having low permeation and good resistance to fuelblends containing methanol. The hose shall consist of an inner layer ofNBR, HNBR or similar fuel resistant elastomer that may or may not beelectrically conductive, a barrier layer such as THV, FEP, PVDF, ETFE, orsimilar pe
4、rmeation resistant material, optional elastomeric tie layerswhere needed, and a cover such as NBR, HNBR, ECO, CSM or CM or similarelastomer that is moderately hydrocarbon, heat and ozone resistant.Reinforced hoses contain one or more plies of braided, knit, or spiralwoven fabric of various synthetic
5、 fibers either bonded within theconstruction or firmly adhered externally to the surface.2. APPLICATIONThese specifications were released originally for gasoline fuel tankfiller and vent hoses and tubing, and for vapor management tubing wheresystem pressures do not exceed 104 kPa. They are capable o
6、f operating atsustained temperatures of 90-100 C for 1000 hours with intermittentexposure up to 115-125 C for 50 hours. (Important Note: Theseconstructions are not for fuel line applications. Additionally, vapormanagement applications may be non-conductive but fill and fill ventapplications must be
7、conductive. (Refer to SAE J 2236 and SAE J 2260.)ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9/A10WSS-M96D33-A11/A12Page 2 of 12WSS-M96D33-A9Constructed of a smooth bore, fuel resistant, electrically conductive,nitrile elastomer (NBR) inner layer bonded firmly to atetrafluoroethylene, hexafluorop
8、ropylene, vinylidene flouride (THV)barrier layer which is, in turn, bonded firmly to additional elastomericlayers. The mechanism(s) by which adhesion of the THV to the adjacent isachieved may involve the use of various adhesion promoters, surfaceactivation, or “tie“ layers to achieve good results. T
9、he cover is achlorosulphonated polyethylene elastomer (CSM). This product isunreinforced.WSS-M96D33-A10Same construction and temperature range as the WSS-M96D33-A9 except thatit is internally reinforced with a bonded single ply of braided, knit, orspiral woven para-aramid.WSS-M96D33-A11Constructed o
10、f a smooth bore, conductive nitrile elastomer (NBR) innerlayer bonded firmly to a tetrafluoroethylene hexafluoropropylenevinylidene flouride (THV) barrier layer which in turn is bonded firmly toadditional elastomeric layers. The mechanism(s) by which adhesion of theTHV to the adjacent is achieved ma
11、y involve the use of various adhesionpromoters, surface activation, or “tie“ layers to achieve good results.The cover is a chloronated polyethylene elastomer (CM). This product isnon-reinforced.WSS-M96D33-A12Same construction and temperature range as the WSS-M96D33-A11 except thatit is internally re
12、inforced with a bonded single ply of braided, knit, orspiral woven para-aramid fiber.3. REQUIREMENTS3.1 QUALITY SYSTEM REQUIREMENTSMaterial suppliers and part producers must conform to QualitySystem Requirements, QS-9000. Material specification requirementsare to be used for initial qualification of
13、 materials. A ControlPlan for ongoing production verification is required. This planmust be reviewed and approved by the relevant Ford Materialsactivity and/or Ford Supplier Technical Assistance (STA) prior toproduction parts submission. Appropriate statistical tools mustbe used to analyze process/p
14、roduct data and assure consistentprocessing of the materials.ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9/A10WSS-M96D33-A11/A12Page 3 of 12Part producers using this material in their products, must useFord approved materials and must conform to a process control planwhich has been approved by ST
15、A and/or the relevant MaterialsActivity.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/orthermal analysis of material/parts supplied to this specification.The IR spectra and thermograms established for initial approvalshall constitut
16、e the reference standard and shall be kept on fileat the designated material laboratory. All samples shall produceIR spectra and thermograms that correspond to the referencestandard when tested under the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based o
17、n material conditionedin a controlled atmosphere of 23 +/- 2 C. and 50 +/- 5 % relativehumidity for not less than 24 hours prior to testing and testedunder the same conditions unless otherwise specified.3.4 INITIAL QUALIFICATION(SAE J 2236/ASTM D 3183/FLTM AZ 105-02/FLTM BZ 105-03)Prior to seeking a
18、pproval to this specification, initialqualification processes include evaluating materials andconstructions according to the applicable fuel System DesignSpecification (SDS) and individual Design Verification Method(DVM). At the time of this specification release, these SDS/DVMdocuments are under de
19、velopment and not available fordistribution. Therefore, it is required that candidateconstructions be reviewed by the appropriate Materials Engineeringoffice prior to proceeding with specification qualificationtesting. In general, the proposed SDS/DVM documents will consistof the following evaluatio
20、ns:3.4.1 Establish the material long term heat agingcharacteristics per SAE J 2236. Property losses forelastomeric materials after 1000 hours are not to exceed50 % of their original properties as determined onspecimens cut from actual finished articles inaccordance with ASTM D 3183. For small diamet
21、erconstructions, those having thin cover stocks, or thosehaving insufficient length, it may not be possible toobtain test specimens that meet minimum dimensionalrequirements described in the applicable standard testmethod. In such cases, surrogate constructions havingthicker material constituents or
22、 other deviations fromstandard methodology not already addressed in thisspecification are to be agreed upon between themanufacturer and Ford Motor Company and are to be statedin the test report.ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9/A10WSS-M96D33-A11/A12Page 4 of 123.4.2 Completion of inne
23、r tube materials fuel compatibilityevaluation listed in FLTM AZ 105-02 aged and evaluatedaccording to FLTM BZ 105-03 for enhanced evaporativeemissions applications. Specimen preparation andexceptions are as described in paragraph 3.4.1, above.3.5 HOSE PERFORMANCE PROPERTIESThis specification is a pe
24、rformance-oriented document that may beused as a materials and construction selection guideline,depending upon particular system performance requirements. Theminimum requirements listed in this specification represent valuesbased upon historical data from similar products and/or systemrequirements.
25、Actual values listed under each individualconstruction are to meet or exceed those minimum requirementsusing data from at least 3 lots from actual production articles.Plus or minus 3-sigma data except where noted will be requiredprior to approval of the product to this specification. Values inparent
26、heses indicates no statistically accepted values yetestablished.3.6 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 lengthof hose and clamp the hose on suitable fittings in a tensiletesting machine t
27、o prevent pull-off. Apply gage marks orextensometers to the hose to measure elongation. Apply a load at arate of 50 mm/minute until the hose ruptures. Record the force tobreak the hose and the elongation of the hose at break. Calculatethe hose breaking strength by dividing the breaking force by thea
28、nnular cross-sectional area of the hose wall. Median values areto be used for reported values, both original and after aging(subsequent paragraphs).Breaking Strength, min (All constructions) 5 MPaA9 A10 A11 A125.8 (6.0) (6.1) 6.1Elongation at Break, % minNon-Reinforced (WSS-M96D33-A9/A11) 150 %Reinf
29、orced (WSS-M96D33-A10/A12) 135 %A9 A10 A11 A12160 (150) (200) 210ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9/A10WSS-M96D33-A11/A12Page 5 of 123.7 BURST PRESSURE, MPa min(ASTM D 380)Hose Size, mm(Approximate ID)Below 9.5 (All constructions) 1.0A9 A10 A11 A121.5 (3.0) (1.5) 3.09.53 - 15.87 (All c
30、onstructions) 0.68A9 A10 A11 A121.0 (2.0) (1.0) 1.515.87 and Larger (All constructions) 0.34A9 A10 A11 A120.5 (1.0) (0.5) 1.33.8 ADHESION, min (All constructions) 1.4 kN/m(ASTM D 413/ISO 8033, Strip Method, Type A) or Cohesive TearA9 A10 A11 A12Cohesive Tear (Cohesive Tear) (Cohesive Tear) Cohesive
31、Tear3.9 OZONE RESISTANCE, (Cover, All constructions, Rating 0all suffixes, ASTM D 1149, 50 pphm, No Cracking/168 h, 40 +/- 2 C) Crazing3.10 HIGH TEMPERATURE RESISTANCE(ISO 188/ASTM D 573)Test Method: Plug the ends of 300 mm samples of hose withstainless steel plugs inserted 25 mm into each end of th
32、e hose.Age the assemblies in an air circulating oven per ISO 188 (ASTM D573) for 1000 h at 100 C. Allow the assemblies to cool to roomtemperature for a period of 16 to 96 hours. After cooling, bendthe hose over a mandrel 10X the nominal O.D. of the hose within 4seconds. No signs of cracks or breaks
33、are permitted on either theI.D. or the O.D. of the hose when examined at 7X magnification.For hose over 17.28 mm ID, prepare strips from the aged hose 13 mmwide. Bend the strips over a 130 +/- 3 mm mandrel cover sideoutward and examine at 7X for cracking.Bend Test (All constructions, all suffixes) N
34、o CrackingIn addition, requirements for the hose properties after aging areas follows:ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9/A10WSS-M96D33-A11/A12Page 6 of 12Breaking strength (per paragraph 3.6) 50 % of originalA9 A10 A11 A12100 % (100 %) (100 %) 110 %Elongation at break (per paragraph 3.
35、6) 50 % of originalA9 A10 A11 A1255 % (50 %) (50 %) 50 %Burst pressure (per paragraph 3.7) 75 % of originalA9 A10 A11 A12170 % (150 %) (150 %) 140 %Adhesion of inner tube 1.4 kN/m orto barrier (per paragraph 3.8) Cohesive TearA9 A10 A11 A12Cohesive Tear (Cohesive Tear) (Cohesive Tear) Cohesive TearO
36、zone resistance (per paragraph 3.9) Rating 03.11 SEQUENTIAL FUEL SOAKCAUTION: This test requires the exposure of hose containing fuelto elevated temperatures. Consult your facilities coordinator andfollow appropriate safety guidelines.Test Method: Plug one end of a 300 mm sample of hose and fillwith
37、 test fuel CM15(ME15), Fuel C with 15 % Methanol and 15 %MTBE. Plug the other end and age for 72 h at 40 C. Drain the fuelfrom the hose and dry out the hose for 24 h at 70 C in anexplosion proof oven. Repeat the fuel soak/dryout for a total of10 consecutive cycles, replacing the fuel at the start of
38、 eachcycle. At the end of the 10 th cycle, requirements for the hoseproperties are as follows:Breaking strength (per paragraph 3.6) 50 % of originalA9 A10 A11 A12110 % (100 %) (100 %) 108%Elongation at break (per paragraph 3.6) 50 % of originalA9 A10 A11 A1290 % (50 %) (50 %) 50 %Burst pressure (per
39、 paragraph 3.7) 75 % of originalA9 A10 A11 A12100 % (100 %) (100 %) 95 %ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9/A10WSS-M96D33-A11/A12Page 7 of 12Adhesion of inner tube 1.4 kN/m orto barrier (per paragraph 3.8) Cohesive TearA9 A10 A11 A12Cohesive Tear (Cohesive Tear) (1.4 kN/m) 1.4 kN/mOzone
40、 resistance (per paragraph 3.9) Rating 03.12 FUEL PERMEABILITY RESISTANCE, 85 % FUEL C/15 % METHANOL(SAE J1737, fuel permeation by recirculation,60 C. Diameters of 12 mm or less may beused as surrogate samples forqualification of larger diameter constructions)Permeation, g/meter sq./24h As specified
41、 in applicableEngineering Specification orDrawing per system requirementsA9 A10 A11 A1240 (60) (60) 653.13 VACUUM COLLAPSE, max 20 %(SAE J30R11, 14.3 kPa vacuum)Test Method: For straight hose, a 1 m length of hose or theassembly shall be held in a straight line. On preformed parts,the vacuum collaps
42、e test shall be performed on the finished part.No diameter shall decrease by more than 20 % during theapplication of vacuum for a minimum of 15 seconds and not morethan 60 seconds. Hose sizes as listed below shall be subjected tothe corresponding vacuum pressure:Nominal Hose I.D19.0 mm (All construc
43、tions) 10 kPaA9 A10 A11 A128% (5.0 %) (5.0 %) 5.0 %ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9/A10WSS-M96D33-A11/A12Page 8 of 123.14 COLD FLEXIBILITY, Hose(SAE J30R11)All constructions No cracks,crazing, or breaksTest Method: A 450 mm length of hose filled with ASTM Fuel C shallbe aged for 168
44、h at 23 C. After aging, the hose shall bedrained. Then, hose together with a mandrel having a diameter 10times the nominal OD will be conditioned for 24 hours at - 40 C.The conditioned hose shall show no signs of cracking ordisintegration when bent 180 degrees over the mandrel. Thisflexing shall be
45、accomplished within 4 seconds. For straight hoseover 17.28 mm ID and all preformed hoses, prepare strips from theFuel C aged hose 13 mm wide with length to be equal to thedeveloped length of the part. Condition the strips and a 130 +/- 3mm mandrel for 24 hours at - 40 C. Bend the strips over themand
46、rel and examine O.D and I.D for cracking.3.15 LEAK TEST AFTER APPLIED STRAINAll constructions No LeaksTest Method: Elongate a min 150 mm length of hose marked with 25mm gage length to 135 % (59 mm between gage marks) at a rate of 50mm/minute. Allow the hose to relax and proof pressure test at 35kPa
47、of water or air under water after the 135 % elongation toindicate pass or fail. Use production hose clamps and mandrelssimulating production tube end forms.3.16 OVALITY, min As specified onEngineering DrawingI.D. minOvality = - x 100I.D. max3.17 FIRE RESISTANCE, Cover only Self-extinguishing(ISO 379
48、5) within 60 secondsA9 A10 A11 A1210 seconds (20) seconds 15 seconds 15 secondsENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A9/A10WSS-M96D33-A11/A12Page 9 of 123.18 RESISTANCE TO KINKING(Not applicable to hoses with I.D. greater than16.28 mm or formed hoses with straight lengthsections less than th
49、e test sample length in thefollowing table, unless otherwise specifiedon engineering drawing.)Test Method: Insert required length of hose on test fixturesecuring each end with metal clamps. When installing hose, itshall be bent within 5 seconds in the same plane and direction asits free state curvature. Place fixture in an oven at 120 +/- 2 Cfor 1 h. Remove fixture from oven and within 5 minutes pass asteel ball of specified diameter through hose installed onfixture. Ball must pass freely.Nominal I.D., I.D. Limits, Test Sample Ball Diametermm mm Length, max mmmm4.8 3.58/ 4.34 200
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