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 there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this p
3、ublication may 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: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2545_201406 SURFACE VEHICLE RECOMMENDED PRACTICE J2545 JUN2014 Issued 2001-03Rea
5、ffirmed 2014-06 Superseding J2545 MAR2009 Test Procedures for Non-SAE Hydraulic Hoses RATIONALE J2545 has been reaffirmed to comply with the SAE five-year review policy. 1. ScopeThis SAE Recommended Practice identifies test procedures and parameters which may be used toevaluate, qualify and inspect
6、non-SAE hydraulic hoses or other hose constructions which do not conform toany established ISO or national standards defining hydraulic hoses. (Non-SAE hydraulic hoses are defined asthose which do not conform to the categories listed in SAE J517.) It is not intended for evaluatingfluoropolymer lined
7、 hose constructions or hose constructions with working pressures above 86 MPa.2. References2.1 Applicable PublicationsThe following publications form a part of this specification to the extent specifiedherein. Unless otherwise specified, the latest issue of SAE publications shall apply.2.1.1 SAE PUB
8、LICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J343Tests and Procedures for SAE 100R Series Hydraulic Hose and Hose AssembliesSAE J516Hydraulic Hose FittingsSAE J517Hydraulic HoseSAE J1273Recommended Practices for Hydraulic Hose Assemblies2.2 Related PublicationsT
9、he following publications are for information purposes only and are not a requiredpart of this document.2.2.1 SAE PUBLICATIONAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1401Road VehicleHydraulic Brake Hose Assemblies for Use with Nonpetroleum BaseHydraulic Fluids, Appe
10、ndix A, Table A1 Hose Manufacturer Identification CodeColored YarnAssignments2.2.2 FEDERAL STANDARDAvailable from the Superintendent of Documents, U.S. Government Printing Office,Washington, DC 20402.Federal Standard 595 Colors Used In Government Procurement3. ConnectorsThe general and dimensional s
11、tandards for hydraulic hose connectors are contained in SAEJ516. It is recommended that connectors consistent with SAE J516 or ISO standards be used to conduct thefollowing tests.SAE INTERNATIONAL J2545 Reaffirmed JUN2014 Page 2 of 4 4. General InformationFor information regarding Age Control, Appli
12、cation Factors, Size Designations,Identification, Offset, and Assembly Length, see sections 3 through 10 in SAE J517. Additional informationregarding the selection, care, use and routing of hose can be found in SAE J1273.5. TestsUnless otherwise agreed upon between the manufacturer and purchaser, te
13、sts for evaluatingconformance of product with specifications shall be on the basis of Qualification Tests and Inspection Tests setforth in this document. Tests may be conducted by the manufacturer, the purchaser, or independent lab, asdecreed by the purchaser. All tests shall be conducted in accorda
14、nce with the procedures in SAE J343.5.1 Inspection Retests and RejectionIn the event of failure of one or more samples to meet any of theinspection tests specified, the product shall be resampled and retested for the test or tests in which it failed.Twice the number of samples designated under the i
15、nitial test procedure shall be selected from the lot inquestion for such retests, and failure of any of the retested samples shall be cause for rejection of the entire lot.5.2 Qualification TestsFor qualification, hose and/or hose assemblies made from the hose in question shallconform to the followi
16、ng tests and requirements. The values used in these tests shall be taken from the hosemanufacturers specification and used as described herein.5.2.1 DIMENSIONAL CHECK TEST (ALL SAMPLES)Shall conform to the dimensions in the hose manufacturersspecification. The inside diameter of hose shall be concen
17、tric with outside diameter of hose and the outersurface of the reinforcement within the limits of Table 1.5.2.2 PROOF TEST (ALL SAMPLES)Shall not leak at proof pressure which shall be twice the maximum workingpressure of the hose.5.2.3 CHANGE IN LENGTH TEST (ONE SAMPLE)Shall not exceed the values sh
18、own in Table 2 when pressurized tomaximum working pressure.TABLE 1HOSE CONCENTRICITYType ofConstructionNominal HoseID, mmConcentricity, FIRID to ODmmConcentricity, FIRID to ReinforcementmmRubber, BraidedReinforcementUp to 6.3, inclOver 6.3 to 19, inclOver 190.81.01.30.40.70.9Rubber, SpiralWire Reinf
19、orcementUp to 19, inclover 191.01.30.70.9Thermoplastic Up to 6.3, inclOver 6.3 to 19, inclOver 190.81.01.3TABLE 2LENGTH CHANGEType ofConstuctionAllowableLength Change, %Rubber,Braided Reinforcement +2, 4Rubber, SpiralWire Reinforcement 2Thermoplastic 3SAE INTERNATIONAL J2545 Reaffirmed JUN2014 Page
20、3 of 4 5.2.4 BURST TEST (ONE 460 mm FREE HOSE LENGTH ASSEMBLY)Shall not leak or fail below the minimum burstpressure which shall be at least 4 times the working pressure.5.2.5 LEAKAGE TEST (TWO 300 mm FREE HOSE LENGTH ASSEMBLIES)Shall not leak or fail.5.2.6 COLD BEND TEST (ONE ASSEMBLY)Shall exhibit
21、 no cover cracks or leakage when tested at the lowtemperature limit of the hose. If no temperature is available use 40 C.5.2.7 OIL RESISTANCE TESTAfter 70 h immersion at the upper temperature limit of the hose in IRM 903 oil, thevolume change of hose inner tube and cover specimens shall be between 0
22、% and +100%.5.2.8 OZONE RESISTANCE TEST (TWO SAMPLES)Specimens shall be subjected to an atmosphere comprised of airand ozone with an ozone partial pressure of 50 mPa (50 parts ozone per 100 million parts of air at standardatmospheric conditions) at an ambient temperature of 40C. After 70 h exposure,
23、 specimens shall not showevidence of cracking or deterioration when viewed with seven-power magnification while still in a stressedcondition.5.2.9 IMPULSE TEST (FOUR UNAGED ASSEMBLIES)The parameters for this test, oil temperature, pressure andnumber of cycles, shall be as determined by the manufactu
24、rer and the user. To aid in selecting theseparameters the following table may be used. The values shown should be considered as minimumrequirements and can be adjusted, as required, for each hose type being evaluated.5.2.10 VISUAL EXAMINATION (ALL SAMPLES)5.2.11 ELECTRICAL CONDUCTIVITY TEST (THIS TE
25、ST APPLIES ONLY TO NON-CONDUCTIVE HOSES)The maximum leak-age shall not exceed 50 vA when subjected to 75 kV/305 mm (75 kV/ft) for 5 min.This test shall not be applicable to hoses which contain pinpricked outer covers, metallic wirereinforcement, and static electricity dissipative materials.5.3 Inspe
26、ction TestsInspection tests listed as follows shall be performed on two samples representing each lotof 150 to 3000 m of bulk hose. Lots of less than 150 m of hose need not be subjected to these tests if a lot hasbeen tested and met the requirements within the previous 12-month period. Requirements
27、shall be the sameas for corresponding Qualification Tests:a. Dimensional Check Test (see 5.2.1)b. Proof Test (see 5.2.2)c. Change in Length Test (see 5.2.3)d. Burst Test (see 5.2.4)In addition, all hose and/or hose assemblies made therefrom shall be subjected to visual examination.TABLE 3IMPULSE TES
28、T PARAMETERSType of ConstructionTest Pressure (psi) as% of Working PressureOil Test TemperatureCMinimum TestCyclesFabric Braid 133% 100 200 000Wire Braid 125% to 133% 100 200 000Spiral Wire 120% to 133% 121 400 000Thermoplastic 125% to 133% 93 200 000SAE INTERNATIONAL J2545 Reaffirmed JUN2014 Page 4
29、 of 4 5.4 Hose IdentificationExcept for hose with a wire braided exterior, the entire length of hose shall be legiblymarked with one or more stripes parallel to the longitudinal axis if the manufacturing process permits. Markingshall include, but is not limited to the following, and shall be repeate
30、d with the first letter of each repeat notmore than 762 mm from the first letter of that preceding. Marking may be in English or metric units as agreedupon by the user and manufacturer.Manufacturers IdentificationHose Dash Size NumberHose ID in Fractions or mmsMaximum Working Pressure (MPa preferred
31、)Date CodeNo mention of the burst pressure or the design factor is allowed on the hose. This information could bemisinterpreted by the user and result in a hose being used above its rated working pressure.For additional hose identification information, see SAE J517, Section 8.PREPARED BY THE SAE FLUID CONDUCTORS AND CONNECTORS TECHNICAL COMMITTEE S2HYDRAULIC HOSE AND HOSE FITTINGS
