SAE-AS-4059D-2001.pdf
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1、SAE-AS4059 ADOPTION NOTICE SAE-AS4059, “FLUIDS, HYDRAULIC, AEROSPACE-CLEANLINESS CLASSIFICATION FOR“, was adopted on 31-AUG-90 for use by the Department of Defense (DoD). Proposed changes by DoD activities must be submitted to the DoD Adopting Activity: Commander, Naval Air Warfare Center, Aircraft
2、Division, Code 414100B120-3, Highway 547, Lakehurst, NJ 08733-5100. Copies of this document may be purchased from the Society of Automotive Engineers 400 Commonwealth Drive Warrendale, Pennsylvania, United States, 15096-0001. http:/www.sae.org/_ Custodians:Adopting Activity: Navy - ASArmy - AV Navy
3、- AS Air Force - 99 Reviewer Activities: Army - MI Navy - MC Air Force - 71 DLA - CC FSC 1650 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Copyright SAE International Provided by IHS under license with SAE Not for ResaleNo reproduction or networking permitted wit
4、hout license from IHS -,- 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 in
5、fringement arising therefrom, 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 2001 Society of Automotive Engineers, Inc. All ri
6、ghts reserved.Printed in U.S.A. TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS: http:/www.sae.org 400 Commonwealth Drive, Warrendale, PA 15096-0001 AEROSPACE STANDARD AS4059 REV. D Issued1988-06-14 Revised2001-04 Superseding AS4059C Aerospace Fluid Power - Cleanliness
7、Classification for Hydraulic Fluids 1.SCOPE: 1.1This SAE Aerospace Standard (AS) defines cleanliness levels for particulate contamination of hydraulic fluids and includes methods of reporting data relating to the contamination levels. The contamination levels selected are an extension of the widely
8、accepted NAS 1638 cleanliness levels. 1.2Purpose: The intent of this standard is to establish the minimum information required to allow valid comparison and interpretation of contamination levels in hydraulic systems that require control of particulate contamination to ensure system performance and
9、reliability. 2.APPLICABLE DOCUMENTS: The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of co
10、nflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1SAE Publications: Available from SAE, 400 Commonwealth Dri
11、ve, Warrendale, PA 15096-0001. ARP598The Determination of Particulate Contamination in Liquids by the Particle Count Method ARP785Aerospace - Procedure for the Determination of Particulate Contamination in Hydraulic Fluids by the Control Filter Gravimetric Procedure AIR877Particle Count Data Convers
12、ion and Extrapolation ARP5376Aerospace - Fluid Systems and Components - Methods, Locations and Criteria for System Sampling and Measuring the Solid Particle Contamination of Hydraulic Fluids Copyright SAE International Provided by IHS under license with SAE Not for ResaleNo reproduction or networkin
13、g permitted without license from IHS -,- SAE AS4059 Revision D - 2 - 2.2AIA Publications: Available from Aerospace Industries Association, 1250 Eye Street, NW, Washington, DC 20005. NAS 1638Cleanliness Requirements of Parts Used in Hydraulic Systems (See Appendix A for NAS 1638 Contamination Limits)
14、 2.3ISO Publications: Available from International Organization for Standardization, 1 rue de Varembe, 1211 Geneva 20 Switzerland, American National Standards Institute, 11 West 42nd Street, New York, NY 10036- 8002 Web address: http:/www.ansi.org or from the National Fluid Power Association (NFPA)
15、Telephone (414)-778-3344 Web address: http:/. ISO 4402 (1991)Hydraulic fluid power - Calibration of automatic-count instruments for particles suspended in liquids - Method using classified AC fine test dust ISO 4406Hydraulic fluid power - Fluids - Method for coding the level of contamination by soli
16、d particles ISO 11171Hydraulic fluid power - Calibration of liquid automatic particle counters ISO 11218Aerospace - Cleanliness classification for hydraulic fluids ISO 12103-1Road vehicles - Test dust for filter evaluation - Part 1: Arizona test dust 3.BACKGROUND: 3.1Appendix A contains the followin
17、g information that will help the user understand the requirements of this standard: a.Comparison of NAS 1638 and AS4059 cleanliness levels b.Automatic particle counter calibration procedures and their effect on cleanliness classes c.NAS 1638 cleanliness classes 4.AS4059 CLEANLINESS CLASSES: 4.1Clean
18、liness Levels by Particle Size: Table 1 lists the cleanliness classes established to provide a set of criteria for specifying fluid cleanliness levels. The classes are based on contaminant size, count, and distribution. Because the particle size depends upon the calibration and method of measurement
19、, the sizes have been assigned alpha characters, A, B, C, D, E, and F. Note that the symbol m(c) is used throughout this document to designate that the particle size was determined using a liquid automatic particle counter calibrated per ISO 11171. The size actually counted will depend upon the cali
20、bration method used for the automatic particle counter as identified in Table 1. Copyright SAE International Provided by IHS under license with SAE Not for ResaleNo reproduction or networking permitted without license from IHS -,- SAE AS4059 Revision D - 3 - TABLE 1 - AS4059 Cleanliness Levels by Pa
21、rticle Count Copyright SAE International Provided by IHS under license with SAE Not for ResaleNo reproduction or networking permitted without license from IHS -,- SAE AS4059 Revision D - 4 - 4.1 (Continued): To provide versatility, the applicable cleanliness class can be identified in the following
22、ways: a.Total number of particles larger than a specific size. Examples: AS4059 Class 6 (see 4.1.1) AS4059 Class 6B (see 4.1.1) b.Designating a class for each size range. Examples: AS4059 Class 6B/5C/4D/4E (see 4.1.2) AS4059 Class 6B/5C/4D/3E/3F (see 4.1.2) c.Basing the class on the highest class of
23、 multiple size ranges (used when NAS 1638 requirements are specified). Example: AS4059 Class 6B-F (see 4.1.3) 4.1.1Classification Based on a Single Size: The NAS 1638 and AS4059 classes are based on a natural distribution of particle sizes. This natural distribution does not really apply for particl
24、es in a filtered fluid as used in a hydraulic system. In a filtered fluid, the highest class number will usually be determined by the counts for the smallest particle size of interest. Therefore, AS4059 Revision B and earlier based the class on the smallest particle size of interest since the smalle
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- SAE AS 4059 2001
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