SAE AS4059E-2011 PDF

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 based 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.

SAE AS4059E-2011 history

2022 SAE AS4059G-2022 Contamination Classification for Hydraulic Fluids
2020 SAE AS4059F-2020 Aerospace Fluid Power - Contamination Classification for Hydraulic Fluids
2013 SAE AS4059F-2013 Aerospace Fluid Power - Contamination Classification for Hydraulic Fluids
2011 SAE AS4059E-2011 Aerospace Fluid Power - Cleanliness Classification for Hydraulic Fluids
2005 SAE AS4059E-2005 (R) Aerospace Fluid Power - Cleanliness Classification for Hydraulic Fluids
2001 SAE AS4059D-2001 Aerospace Fluid Power - Cleanliness Classification for Hydraulic Fluids
2000 SAE AS4059C-2000 Contamination Classification for Hydraulic Fluids
1995 SAE AS4059B-1995 Aerospace-Cleanliness Classification for Hydraulic Fluids
1990 SAE AS4059A-1990 AEROSPACE-CLEANLINESS CLASSIFICATION FOR HYDRAULIC FLUIDS
1988 SAE AS4059-1988 AEROSPACE-CLEANLINESS CLASSIFICATION FOR HYDRAULIC FLUIDS