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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 entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, 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 International All rights reserved. No part of this publication may
3、 be 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) Fa
4、x: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS:http:/www.sae.org SURFACE VEHICLE STANDARD J2405 REAF. JUL2007 Issued1997-08 Reaffirmed2007-07 Superseding J2405 AUG1997 Low-Permeation Fuel Fill and Vent Tube 1.ScopeThis SAE Standard covers the minimum requirements for a low-permeation
5、tubing (100 g/m2day or less) for use as a low pressure (14.5 kPa) liquid- or vapor-carrying component for use in gasoline or diesel fuel filler, vent, and vapor systems. The construction shall be designed to be functional over a temperature range of 40 C to 100 C for the T1 designation, or 40 C to 1
6、25 C for the T2 designation. 1.1RationaleReviewed by SAE Non-Hydraulic Hose Committee and reinstated without change. 2.References 2.1Applicable PublicationsThe following publications form a part of the specification to the extent specified herein. Unless otherwise indicated the latest revision of SA
7、E publications shall apply. 2.1.1SAE 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 Recirculation Tec
8、hnique 2.1.2ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 380Methods of Testing Rubber Hose ASTM D 413Test Methods for Rubber Property: Adhesion to Flexible Substrate ASTM D 471Test for Rubber Property: Effect o
9、f Liquids ASTM D 1149Test Method for Rubber Deterioration: Surface Ozone Cracking in a Chamber (Flat Specimens) 2.2Related PublicationsThe following publications are provided for information purposes only and are not a required part of this document. SAE J2405 Reaffirmed JUL2007 -2- 2.2.1SAE PUBLICA
10、TIONSAvailable 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 J30Fuel and Oil Hoses SAE J1645Fuel System Electrostatic Charge SAE J1681Gasoline/Methanol Mixtures for Material Testing SAE J2260Nonm
11、etallic Fuel System Tubing With One or More Layers 2.2.2ASTM 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 Materials ASTM D 412Test for Rubber Properties in Tension ASTM
12、D 573Test for Rubber: Deterioration in an Air Oven 2.2.3RMA 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 Hose 3.ConstructionThe construction typica
13、lly consists of a smooth bore or laminated tube of one or more synthetic rubber compound(s) and/or thermoplastic material(s) resistant to chemical attack, swelling, and permeation by gasoline, alcohol extended gasoline, or diesel fuel. It may also be covered with a suitable oil, ozone, and heat-resi
14、stant synthetic rubber compound or thermoplastic. The specific construction details are to be agreed between the supplier and the original purchaser. 4.Dimensions 4.1The 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 sizes 25.4 mm through 50.8 mm
15、ID, and 9.5 mm for sizes over 50.8 mm ID. Reference Table 1. 4.2When tubing is supplied in specific cut or long lengths, the length tolerances shall be as in Table 2. 4.3End squareness shall be measured as the angle between a plane intersecting the long and short extremes of the tube end and a plane
16、 perpendicular to the tube axis. The allowable maximum out-of-squareness is specified in Table 1. 5.When a tube is supplied as a preformed item, the tolerance shall be as follows: 5.1Squareness of EndsThe tolerance on squareness of ends of preformed parts shall be a minimum 15% of the nominal tube O
17、D on all sizes through 25.4 mm ID, 6.3 mm for sizes 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. 5.2Arms LengthsMeasured from end to intersection of nearest centerline. Each end shall be as described in Section 4. The
18、se tolerances apply also to the length of an expanded end. 5.3General LayoutDimensions locating bend intersections are to establish the theoretical centerline of the tube. Actual outside contour of the tube must be held within 4.8 mm in all planes with respect to the theoretical outside contour. To
19、check contour, tube ends should first be placed in nominal position (it may have to be flexed to correct any distortion caused by handling after vulcanization in the producing plant or in shipment) in a checking fixture made in accordance with user requirements from which contour deviation can be me
20、asured. Allowance shall be provided in the end-mounting area of the fixture for the arm length tolerances which are applicable. -,-,- 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
21、.5 mm. The wall gauge within bends of a preformed tube may differ from the gauge in straight portions. The difference shall not exceed 33%. TABLE 1DIMENSIONS AND TOLERANCES Nominal Size mm Inside Diameter mm Outside Diameter(1) mm 1.Concentricity based on total indicator reading between the inside b
22、ore and the outer surface of the tube shall not exceed the values given as follows: Sizes 6.4 mm and under:0.762 mm Sizes over 6.4 mm up to 12.7 mm:1.016 mm Sizes over 12.7 mm:1.270 mm End Out-of Squareness Angle, Deg(2) 2.These values were determined by the equation: A = 15 degrees K X D where: A =
23、 Maximum out-of-squareness angle K = 0.12 degree per mm of diameter (a slope factor derived from linear best-fit previous squareness requirement) D = Nominal inside diameter in millimeters 4.04.0 0.49.1 0.614.5 4.84.8 0.410.3 0.614.4 5.65.6 0.411.1 0.614.3 6.46.4 0.412.7 0.614.2 7.07.0 0.413.5 0.614
24、.1 7.97.9 0.414.3 0.614.0 8.78.7 0.415.1 0.614.0 9.59.5 0.415.9 0.613.9 11.111.1 0.618.3 0.813.7 12.712.7 0.619.8 0.813.5 15.915.9 0.823.8 0.813.1 19.119.1 0.828.6 0.812.7 25.425.4 0.834.9 1.612.0 31.831.8 1.0 not specified(3) 3.The wall gauge for sizes 31.8 mm to 50.8 mm shall be between 4.3 to 5.9
25、 mm, and for sizes 57.2 mm to 63.5 mm, between 4.3 to 6.4 mm. 11.2 38.138.1 1.0 not specified(3) 10.4 44.544.5 1.0 not specified(3) 9.7 50.850.8 1.0 not specified(3) 8.9 57.257.2 1.0 not specified(3) 8.1 63.563.5 1.0 not specified(3) 7.4 SAE J2405 Reaffirmed JUL2007 -4- 6.TestsProcedures described b
26、y ASTM D 380 are to be followed. All temperature tolerances are 2 C unless otherwise specified. 6.1Qualification TestingIn order to qualify under this specification, tube or the assembly must meet all the applicable test requirements of Section 7. Tube for testing will be 12.7 mm ID or agreed upon b
27、etween supplier and user. The construction must be representative of constructions of all other sizes. The impermeable layer thickness cannot be reduced with other sizes. 6.2Frequency of Testing for QualificationQualification testing to be performed once each year except for permeation testing which
28、 only needs to be tested initially. 6.3Inspection TestingON tube or the assembly, the 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 (if required). 6.4Frequency of Testing for Inspectio
29、n and Quality Acceptance StandardsQuality acceptance standards to be agreed upon between supplier and the original purchaser. 7.Test Requirements 7.1Burst Test (Inspection Test on all sizes)The minimum burst shall be 350 kPa per ASTM D 380. 7.2Vacuum Collapse Test (Inspection Test on all sizes)For s
30、traight tube, a 1 m length of tube 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 application of vacuum for a minimum of 15 s and not more than 60 s. Tube sizes
31、 as listed in Table 3 shall be subjected to the corresponding vacuum pressure: 7.3Low-Temperature 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 that is 10 t
32、imes the nominal OD to a temperature of 40 C for 24 h. Bend the tube or sample around the mandrel while keeping both at the prescribed temperature. It shall not fracture and shall not show cracks, checks, or breaks in any of the layers of construction. TABLE 2CUT OR LONG LENGTH TOLERANCES Length m P
33、recision mm Commercial mm 0-0.3 3.0+ 9.5/3.0 over 0.3-0.6 4.8+9.5/4.8 over 0.6-0.96.3+12.7/-6.3 over 0.9-1.29.5+12.7/-9.5 over 1.2-1.812.7+19.0/-12.7 over 1.81%+2%/0% TABLE 3VACUUM COLLAPSE MINIMUM PRESSURES Tube ID SizeVacuum Pressure 25.4 mm to 44.5 mm14.3 kPa 44.5 mmlimit to be agreed upon betwee
34、n supplier and manufacturer -,-,- SAE J2405 Reaffirmed JUL2007 -5- 7.4Original Material Properties (Qualification Test)The test procedure and apparatus shall be in accordance with ASTM D 412, where applicable. a.Original Tensile Strength of Cover7 MPa min b.Original Tensile Strength of tube or Lamin
35、ated Tube7 MPa min c.Original Elongation of Cover150% min d.Original Elongation of Tube or Laminated Tube150% min 7.5Heat Resistance (Qualification Test)Expose a 300 mm length tube for 1000 h at the prescribed test temperature. The test temperature for a T1 construction is 100 C and 125 C for the T2
36、 construction. Remove the tube from the oven and allow to cool to room temperature for a minimum of 2 h. Bend it over a mandrel having a diameter of 10 times the nominal OD within 4 s. Examine it, both inside and outside. The tube shall show no cracks or breaks. 7.6Electrical Conductivity (Inspectio
37、n Test on all sizes)The purpose is to provide a conductive pathway to dissipate any static electrical buildup. This test is required only for tube that will be designated as electrically conductive. An entire tube (maximum length 610 mm) will be used for this test, unless its length exceeds 610 mm,
38、at which time the length for test shall be 610 mm. Insert a brass, steel, or copper plug or fitting into each end. Place clamps 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)
39、. The maximum resistance allowable is 10 M. NOTE 1The diameter of the plug or fitting should be close to the ID of the tube. NOTE 2The tube while under test should be placed on a nonconductive surface. NOTE 3Ohmmeter must have the capability of measuring resistance from 101 to 103 M at 550 V DC. 7.7
40、Oil Resistance (Qualification Test)After immersion in IRM 903 oil for 70 h, at 125 C per ASTM D 471, the volume change of a sample taken from the outer layer (or tube, in the case of a monolayer tube) shall not exceed +60%. 7.8Fuel Resistance (Qualification Test)After immersion in ASTM Reference Fue
41、l C for 48 h, at 23 C per ASTM D 471, the physical values of the specimens taken from the tube or inner tube, when taken from a laminated tube, shall not exceed the change in value as follows: a.Tensile Change:45% max b.Elongation Change: 45% max c.Volume Change:0 to 50% NOTEIf a laminated tube is u
42、sed, the inner tube must be separated and tested alone. If a satisfactory test specimen cannot be provided from the inner tube, then a lab prepared test slab is acceptable. 7.9Test for Extractables in Tube (Qualification Test) a.Apparatus and Reagents ASTM Reference Fuel C (50 Toluene50 Isooctane pe
43、rcent by volume) Methanol, 99% minimum purity Gooch crucible Glass fiber filter, Grade 934AH Beaker100 mL Heating unit -,-,- SAE J2405 Reaffirmed JUL2007 -6- b.SpecimensTube under test shall be 300 mm long; plugged at both ends with metal (aluminum or steel) plugs to retain the fluid. Calculate insi
44、de surface area based on the actual inside diameter of the tube for its total effective length. The total effective length of tube with end plugs inserted shall be 274 mm. c.ProcedureRecord tube actual inside diameter, length, and inside surface area. Preferred method is with plug gauges to nearest
45、0.025 mm. Fill tube with ASTM Reference Fuel C. Allow to stand for 24 h at temperature of 23 C. NOTESolubility of waxy hydrocarbon is affected by temperature. Take up residue with 30 mL of room temperature 23 C 2 C methanol. Filter this solution on the tared crucible, rinsing beaker twice with 10 mL
46、 of 23 C 2 C methanol. Place crucible in tared beaker and dry in a 65 to 90 C oven for 1 h to insure complete evaporation of methanol. Weigh the crucible and tared beaker and determine mass of extractables expressed as g/m2 using inside surface area of tube in contact with Reference Fuel C. Value fo
47、r total waxy extractables shall be less than 2.50 g/m2. 7.10 Ozone ResistanceThe test procedure and apparatus shall be in accordance with ASTM D 1149, where applicable. a.Sample PreparationFor straight tube, sufficient length shall be bent around a mandrel with OD eight times the nominal OD of the s
48、pecimen. The two ends shall be tied at their crossing with enameled copper or aluminum wire. b.For preformed parts, prepare a specimen by cutting a strip of tube 12.7 mm x 100 mm long and tie specimen (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 a temperature of 40 C for 70 h. Remove the specimen from the chamber, allow to cool to a temperature of 23 C. The specimen cover shall be visually in