1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2007 SAE InternationalAll rights reserved. No part of this publication may be
3、reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying,recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: 724-776-4970 (outside USA)Fax: 724-
4、776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSURFACEVEHICLESTANDARDJ2405REAF.JUL2007Issued 1997-08Reaffirmed 2007-07Superseding J2405 AUG1997Low-Permeation Fuel Fill and Vent Tube1. ScopeThis SAE Standard covers the minimum requirements for a low-permeation tubing (100 g/m2
5、day orless) for use as a low pressure (14.5 kPa) liquid- or vapor-carrying component for use in gasoline or diesel fuelfiller, vent, and vapor systems. The construction shall be designed to be functional over a temperature rangeof 40 C to 100 C for the T1 designation, or 40 C to 125 C for the T2 des
6、ignation.1.1 RationaleReviewed by SAE Non-Hydraulic Hose Committee and reinstated without change.2. References2.1 Applicable PublicationsThe following publications form a part of the specification to the extent specifiedherein. Unless otherwise indicated the latest revision of SAE publications shall
7、 apply.2.1.1 SAE PUBLICATIONAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel:877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.SAE J1737Recommended Practice for Measurement of Permeation Resistance by the RecirculationTechnique2.1.2 ASTM PUBLIC
8、ATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959,Tel: 610-832-9585, www.astm.org.ASTM D 380Methods of Testing Rubber HoseASTM D 413Test Methods for Rubber Property: Adhesion to Flexible SubstrateASTM D 471Test for Rubber Property: Effect of LiquidsASTM D 1149Test Me
9、thod for Rubber Deterioration: Surface Ozone Cracking in a Chamber (FlatSpecimens)2.2 Related PublicationsThe following publications are provided for information purposes only and are not arequired part of this document.SAE J2405 Reaffirmed JUL2007-2-2.2.1 SAE PUBLICATIONSAvailable from SAE, 400 Com
10、monwealth Drive, Warrendale, PA 15096-0001, Tel:877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.SAE J30Fuel and Oil HosesSAE J1645Fuel System Electrostatic ChargeSAE J1681Gasoline/Methanol Mixtures for Material TestingSAE J2260Nonmetallic Fuel System Tubing With One o
11、r More Layers2.2.2 ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959,Tel: 610-832-9585, www.astm.org.ASTM D 257DC Resistance or Conductance of Insulating MaterialsASTM D 412Test for Rubber Properties in TensionASTM D 573Test for Rubber: Deterioration in an
12、 Air Oven2.2.3 RMA PUBLICATIONAvailable from Rubber Manufacturers Association, 1400 K Street, NW, Suite 900,Washington, DC 20005, Tel: 202-682-4800, www.rma.org.RMA IP-2Method for Measuring Electrical Resistance of Hose3. ConstructionThe construction typically consists of a smooth bore or laminated
13、tube of one or moresynthetic rubber compound(s) and/or thermoplastic material(s) resistant to chemical attack, swelling, andpermeation by gasoline, alcohol extended gasoline, or diesel fuel. It may also be covered with a suitable oil,ozone, and heat-resistant synthetic rubber compound or thermoplast
14、ic. The specific construction details are tobe agreed between the supplier and the original purchaser.4. Dimensions4.1 The ends of the tube shall be square within 3.0 mm for sizes up to but excluding 25.4 mm ID, 6.4 mm for sizes25.4 mm through 50.8 mm ID, and 9.5 mm for sizes over 50.8 mm ID. Refere
15、nce Table 1.4.2 When tubing is supplied in specific cut or long lengths, the length tolerances shall be as in Table 2.4.3 End squareness shall be measured as the angle between a plane intersecting the long and short extremes ofthe tube end and a plane perpendicular to the tube axis. The allowable ma
16、ximum out-of-squareness isspecified in Table 1.5. When a tube is supplied as a preformed item, the tolerance shall be as follows:5.1 Squareness of EndsThe tolerance on squareness of ends of preformed parts shall be a minimum 15% ofthe nominal tube OD on all sizes through 25.4 mm ID, 6.3 mm for sizes
17、 over 25.4 mm ID through 50.8 mm ID,and 9.5 mm for sizes over 50.8 mm ID. End squareness shall be measured as described in 4.1.5.2 Arms LengthsMeasured from end to intersection of nearest centerline. Each end shall be as described inSection 4. These tolerances apply also to the length of an expanded
18、 end.5.3 General LayoutDimensions locating bend intersections are to establish the theoretical centerline of thetube. Actual outside contour of the tube must be held within 4.8 mm in all planes with respect to the theoreticaloutside contour. To check contour, tube ends should first be placed in nomi
19、nal position (it may have to beflexed to correct any distortion caused by handling after vulcanization in the producing plant or in shipment) ina checking fixture made in accordance with user requirements from which contour deviation can be measured.Allowance shall be provided in the end-mounting ar
20、ea of the fixture for the arm length tolerances which areapplicable.SAE J2405 Reaffirmed JUL2007-3-When the ID of an end of the tube is enlarged, the wall gauge of the enlarged end normally changes.Allowable change should be +0.8 0.5 mm. The wall gauge within bends of a preformed tube may differ fro
21、mthe gauge in straight portions. The difference shall not exceed 33%.TABLE 1DIMENSIONS AND TOLERANCESNominalSizemmInsideDiametermmOutsideDiameter(1)mm1. Concentricity based on total indicator reading between the inside bore and the outer surface of the tube shall not exceed the values given as follo
22、ws:Sizes 6.4 mm and under:0.762 mmSizes over 6.4 mm up to 12.7 mm:1.016 mmSizes over 12.7 mm:1.270 mmEnd Out-ofSquarenessAngle, Deg(2)2. These values were determined by the equation:A = 15 degrees K X Dwhere:A = Maximum out-of-squareness angleK = 0.12 degree per mm of diameter (a slope factor derive
23、d from linear best-fit previous squareness requirement)D = Nominal inside diameter in millimeters4.0 4.0 0.4 9.1 0.6 14.54.8 4.8 0.4 10.3 0.6 14.45.6 5.6 0.4 11.1 0.6 14.36.4 6.4 0.4 12.7 0.6 14.27.0 7.0 0.4 13.5 0.6 14.17.9 7.9 0.4 14.3 0.6 14.08.7 8.7 0.4 15.1 0.6 14.09.5 9.5 0.4 15.9 0.6 13.911.1
24、 11.1 0.6 18.3 0.8 13.712.7 12.7 0.6 19.8 0.8 13.515.9 15.9 0.8 23.8 0.8 13.119.1 19.1 0.8 28.6 0.8 12.725.4 25.4 0.8 34.9 1.6 12.031.8 31.8 1.0not specified(3)3. The wall gauge for sizes 31.8 mm to 50.8 mm shall be between 4.3 to 5.9 mm, and for sizes 57.2 mm to 63.5 mm, between 4.3 to 6.4 mm.11.23
25、8.1 38.1 1.0not specified(3)10.444.5 44.5 1.0not specified(3)9.750.8 50.8 1.0not specified(3)8.957.2 57.2 1.0not specified(3)8.163.5 63.5 1.0not specified(3)7.4SAE J2405 Reaffirmed JUL2007-4-6. TestsProcedures described by ASTM D 380 are to be followed. All temperature tolerances are 2 C unlessother
26、wise specified.6.1 Qualification TestingIn order to qualify under this specification, tube or the assembly must meet all theapplicable test requirements of Section 7. Tube for testing will be 12.7 mm ID or agreed upon between supplierand user. The construction must be representative of constructions
27、 of all other sizes. The impermeable layerthickness cannot be reduced with other sizes.6.2 Frequency of Testing for QualificationQualification testing to be performed once each year except forpermeation testing which only needs to be tested initially.6.3 Inspection TestingON tube or the assembly, th
28、e following inspection tests shall apply: (7.1) burst, (7.2)vacuum collapse, (7.11.1) original adhesion, (7.12) kink resistance, and (7.6) electrical conductivity (ifrequired).6.4 Frequency of Testing for Inspection and Quality Acceptance StandardsQuality acceptance standardsto be agreed upon betwee
29、n supplier and the original purchaser.7. Test Requirements7.1 Burst Test (Inspection Test on all sizes)The minimum burst shall be 350 kPa per ASTM D 380.7.2 Vacuum Collapse Test (Inspection Test on all sizes)For straight tube, a 1 m length of tube or theassembly shall be held in a straight line. On
30、preformed parts, the vacuum collapse test shall be performed onthe finished part. No diameter shall decrease by more than 20% during application of vacuum for a minimumof 15 s and not more than 60 s. Tube sizes as listed in Table 3 shall be subjected to the corresponding vacuumpressure:7.3 Low-Tempe
31、rature Flexibility (Qualification Test)Fill tube with Reference Fuel C and seal both ends.Allow it to condition at 23 C for 168 h. Drain the fuel. Immediately expose the tube along with a mandrel thatis 10 times the nominal OD to a temperature of 40 C for 24 h. Bend the tube or sample around the man
32、drelwhile keeping both at the prescribed temperature. It shall not fracture and shall not show cracks, checks, orbreaks in any of the layers of construction.TABLE 2CUT OR LONG LENGTH TOLERANCESLengthmPrecisionmmCommercialmm0-0.3 3.0 + 9.5/3.0over 0.3-0.6 4.8 +9.5/4.8over 0.6-0.9 6.3 +12.7/-6.3over 0
33、.9-1.2 9.5 +12.7/-9.5over 1.2-1.8 12.7 +19.0/-12.7over 1.8 1% +2%/0%TABLE 3VACUUM COLLAPSE MINIMUM PRESSURESTube ID Size Vacuum Pressure25.4 mm to 44.5 mm 14.3 kPa44.5 mm limit to be agreed upon between supplier and manufacturerSAE J2405 Reaffirmed JUL2007-5-7.4 Original Material Properties (Qualifi
34、cation Test)The test procedure and apparatus shall be in accordancewith ASTM D 412, where applicable.a. Original Tensile Strength of Cover7 MPa minb. Original Tensile Strength of tube or Laminated Tube7 MPa minc. Original Elongation of Cover150% mind. Original Elongation of Tube or Laminated Tube150
35、% min7.5 Heat Resistance (Qualification Test)Expose a 300 mm length tube for 1000 h at the prescribed testtemperature. The test temperature for a T1 construction is 100 C and 125 C for the T2 construction.Remove the tube from the oven and allow to cool to room temperature for a minimum of 2 h. Bend
36、it over amandrel having a diameter of 10 times the nominal OD within 4 s. Examine it, both inside and outside. Thetube shall show no cracks or breaks.7.6 Electrical Conductivity (Inspection Test on all sizes)The purpose is to provide a conductive pathway todissipate any static electrical buildup. Th
37、is test is required only for tube that will be designated as electricallyconductive.An entire tube (maximum length 610 mm) will be used for this test, unless its length exceeds 610 mm, at whichtime the length for test shall be 610 mm. Insert a brass, steel, or copper plug or fitting into each end. P
38、laceclamps on each end of the tube and firmly tighten. Attach the ohmmeter electrodes to the plugs at each end.Measure the resistance between the plugs while applying 550 V DC (50 V). The maximum resistanceallowable is 10 M.NOTE 1The diameter of the plug or fitting should be close to the ID of the t
39、ube.NOTE 2The tube while under test should be placed on a nonconductive surface.NOTE 3Ohmmeter must have the capability of measuring resistance from 101to 103M at 550 V DC.7.7 Oil Resistance (Qualification Test)After immersion in IRM 903 oil for 70 h, at 125 C per ASTM D 471, thevolume change of a s
40、ample taken from the outer layer (or tube, in the case of a monolayer tube) shall notexceed +60%.7.8 Fuel Resistance (Qualification Test)After immersion in ASTM Reference Fuel C for 48 h, at 23 C perASTM D 471, the physical values of the specimens taken from the tube or inner tube, when taken from a
41、laminated tube, shall not exceed the change in value as follows:a. Tensile Change: 45% maxb. Elongation Change: 45% maxc. Volume Change: 0 to 50%NOTEIf a laminated tube is used, the inner tube must be separated and tested alone. If a satisfactorytest specimen cannot be provided from the inner tube,
42、then a lab prepared test slab is acceptable.7.9 Test for Extractables in Tube (Qualification Test)a. Apparatus and ReagentsASTM Reference Fuel C (50 Toluene50 Isooctane percent by volume)Methanol, 99% minimum purityGooch crucibleGlass fiber filter, Grade 934AHBeaker100 mLHeating unitSAE J2405 Reaffi
43、rmed JUL2007-6-b. SpecimensTube under test shall be 300 mm long; plugged at both ends with metal (aluminum orsteel) plugs to retain the fluid. Calculate inside surface area based on the actual inside diameter of thetube for its total effective length. The total effective length of tube with end plug
44、s inserted shall be274 mm.c. ProcedureRecord tube actual inside diameter, length, and inside surface area. Preferred method iswith plug gauges to nearest 0.025 mm. Fill tube with ASTM Reference Fuel C. Allow to stand for 24 hat temperature of 23 C.NOTESolubility of waxy hydrocarbon is affected by te
45、mperature.Take up residue with 30 mL of room temperature 23 C 2 C methanol. Filter this solution on thetared crucible, rinsing beaker twice with 10 mL of 23 C 2 C methanol. Place crucible in taredbeaker and dry in a 65 to 90 C oven for 1 h to insure complete evaporation of methanol. Weigh thecrucibl
46、e and tared beaker and determine mass of extractables expressed as g/m2using inside surfacearea of tube in contact with Reference Fuel C. Value for total waxy extractables shall be less than2.50 g/m2.7.10 Ozone ResistanceThe test procedure and apparatus shall be in accordance with ASTM D 1149, where
47、applicable.a. Sample PreparationFor straight tube, sufficient length shall be bent around a mandrel with OD eighttimes the nominal OD of the specimen. The two ends shall be tied at their crossing with enameledcopper or aluminum wire.b. For preformed parts, prepare a specimen by cutting a strip of tu
48、be 12.7 mm x 100 mm long and tiespecimen (cover out) around a 12.0 mm diameter mandrel.c. After mounting, the specimen shall be allowed to rest in an ozone-free atmosphere for 24 h at 23 C.The mounted specimen shall be placed in a test chamber containing ozone at 100 mPa 5 mPa at atemperature of 40
49、C for 70 h. Remove the specimen from the chamber, allow to cool to a temperatureof 23 C. The specimen cover shall be visually inspected under 7X magnification and must meet a “0”rating except for the area immediately adjacent to the wire, which shall be ignored.NOTEThis test applies to the cover only and cracks in the exposed tube or cut edges of the cover shallbe ignored.7.11 Adhesion7.11.1 ORIGINAL ADHESION (INSPECTIO
