SAE Standards

Aerospace Fluid Power - Cleanliness Classification for Hydraulic Fluids

Product Code: AS4059
Revision Number: E
Date Published: 2005-05-02
Date Reaffirmed: March 2011

Issuing Committee:

A-6c1 Contamination And Filtration Committee

Scope

This SAE Aerospace Standard (AS) defines cleanliness classes for particulate contamination of hydraulic fluids and includes methods of reporting related data (Appendix A). The contamination classes selected are an extension ofbased on the widely accepted NAS 1638 cleanliness classes. Conversion from NAS 1638 cleanliness class specifications to AS4059 class specifications is defined. Comparison of the NAS 1638 classes to AS4059 classes is defined and the differences explained (Appendix B). This document provides versatility in identifying a maximum class in multiple size ranges, total number of particles larger than a specific size or designating a class for each size. NAS 1638 classes based on weight of particles are not applicable to either of these classes and are not included.

Product Status: In Stock

File Size: 482K

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Current & Historical versions of this standard
Standard Date published ?Status
AS4059E 2005-05-02 Reaffirmed
AS4059D 2001-04-01 Revised
AS4059C 2000-08-01 Revised
AS4059B 1995-03-01 Revised
AS4059A 1990-03-30 Revised
AS4059 1988-06-14 Issued
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