SAE J343-2004 Test and Test Procedures for SAE 100R Series Hydraulic Hose and Hose Assemblies.pdf
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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 2003 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: custsvcsae.org SAE WEB ADDRESS:http:/www.sae.org SURFACE VEHICLE STANDARD J343 REV. JAN2004 Issued1968-06 Revised2004-01 Superseding J343 JUL2001 Test and Test Procedures for SAE 100R Series Hydraulic Hose and Hose Assemblies This document is technically equivalent to ISO 6605
5、 except as noted in the Foreword. ForewordSAE J343 has been revised to be technically equivalent to ISO 6605, except that additional tests in paragraphs 4.9 to 4.14 were included. 1.ScopeThis SAE Standard gives methods for testing and evaluating performance of the SAE 100R series of hydraulic hose a
6、nd hose assemblies (hose and attached end fittings) used in hydraulic fluid power systems. Specific tests and performance criteria for evaluating hose assemblies used in hydraulic service are in accordance with the requirements for hose in the respective specifications of SAE J517. This document fur
7、ther establishes a uniform means of testing and evaluating performance of hydraulic hose assemblies. 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 SAE publications
8、shall apply. 2.1.1SAE PUBLICATIONAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J517Hydraulic Hose 2.1.2ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM D 380Standard Methods of Testing Rubber Hose 2.1.3ISO PUBLICATIONSAv
9、ailable from ANSI, 25 West 43nd Street, New York, NY 10036-8002. ISO 3448Industrial liquid lubricantsISO viscosity classification ISO 6605Hydraulic fluid powerHose assembliesMethod of test SAE J343 Revised JAN2004 -2- 3.Test ProceduresThe test procedures described in the current issue of ASTM D 380
10、shall be followed. However, in cases of conflict between the ASTM specifications and those described as follows, the latter shall take precedence. Unless otherwise specified in this document, or other SAE standards, tests shall be conducted at the prevailing ambient temperature of the testing facili
11、ty. 4.Standard Tests WARNINGWater or another liquid suitable for the hose under test shall be used as the test medium. The use of air and other gaseous materials as testing media should be avoided because of the risk to operators. In special cases where such media are required for the tests, strict
12、safety measures are imperative. Furthermore, it is stressed that when a liquid is used as the test medium, it is essential that all air is expelled from the test piece because of the risk of injury to the operator due to the sudden expansion of trapped air released when the hose bursts. 4.1Dimension
13、al Check TestThe hose shall be inspected for conformity to all dimensions tabulated in the applicable specification. Determine finished outside diameters and reinforcement diameters, where required, by calculation from measurement of the respective circumference. As an alternative, use a flexible ta
14、pe graduated to read the diameter directly. Measure the inside diameter by means of a suitable expanding ball or telescoping gage. Measure concentricity over both the reinforcement and the finished outside diameters using either a dial indicator gage or a micrometer. Round the foot of the measuring
15、instrument to conform to the inside diameter of the hose. Take readings at 90 degree intervals around the hose NOTEAcceptability is based on the total variation between the high and the low readings. Take inside and outside diameter measurements at a minimum of 25 mm from the hose ends and concentri
16、city measurements at a minimum of 13 mm from the hose ends. 4.2Proof TestTest the hose assemblies hydrostatically to the specified proof pressure for a period of not less than 30 s nor more than 60 s. There shall be no indication of failure or leakage. 4.3Change in Length TestConduct measurements fo
17、r the determination of elongation or contraction on a previously untested, unaged hose assembly having at least 600 mm length of free hose between hose fittings. Attach the hose assembly to the pressure source in an unrestricted straight position. If the hose is not straight due to its natural curva
18、ture, it may be fastened laterally to achieve a straight position. Pressurize to the specified operating pressure for a period of 30 s, then release the pressure. Place accurate reference marks 500 mm apart on the outer cover of the hose, midway between fittings, after allowing the hose assembly to
19、restabilize for a period of 30 s following pressure release. Repressurize the hose assembly to the specified operating pressure for a period of 30 s. SAE J343 Revised JAN2004 -3- Measure the final length while the hose is pressurized. The final length is the distance between reference marks while th
20、e hose is pressurized. Complete the determination of the change in length using Equation 1: (Eq. 1) where: l0 is the distance between the reference marks when the hose was not pressurized following the initial pressurization; l1 is the distance between the reference marks under pressure; l is the pe
21、rcentage change in length, which will be positive (+) in the case of an increase in length and negative () in the case of a decrease in length. 4.4Burst TestSubject unaged hose assemblies, on which the end fittings have been attached for not more than 30 days, to a hydrostatic pressure, increased at
22、 a constant rate so as to attain the specified minimum burst pressure within a period of not less than 15 s nor more than 60 s. Reject hose assemblies showing leakage, hose burst or indication of failure below the specified minimum burst pressure. NOTEThis is a destructive test. Assemblies which hav
23、e been subjected to this test shall be destroyed. 4.5Cold Bend TestSubject hose assemblies to the specified temperature in a straight position for 24 h. Then, while still at the specified temperature, the samples shall be evenly and uniformly bent once over a mandrel having a diameter equal to twice
24、 the specified minimum bend radius. Bending shall be accomplished within a period of not less than 8 s nor more than 12 s. In the case of hose sizes up to and including 22 mm nominal inside diameter, bend them through 180 degrees over the mandrel; in the case of hose sizes larger than 22 mm nominal
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