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Standard

Sensitization and Corrosion in Stainless Steel Filters
2014-02-06
CURRENT
AIR844B
This document reviews briefly the subject of woven metal screens. Conditions that can promote damaging corrosion in stainless steel filter screens are discussed and recommendations are listed for minimizing corrosion damage. This is a general document only; for specific applications it is suggested that the reader refer to the technical literature, and selected references listed below.
Standard

Sensitization and Corrosion in Stainless Steel Filters
2008-06-04
HISTORICAL
AIR844A
This document reviews briefly the subject of woven metal screens. Conditions that can promote damaging corrosion in stainless steel filter screens are discussed and recommendations are listed for minimizing corrosion damage. This is a general document only; for specific applications it is suggested that the reader refer to the technical literature, and selected references listed below.
Standard

RECOMMENDED STANDARD FOR AEROSPACE FILTER ELEMENT FINE WIRE MESH
2011-02-11
HISTORICAL
AIR888
This AIR discusses the nature, method of manufacture and chemistry of fine wire meshes of the type used for filtration and similar applications, and how this information may be utilized in setting up a quality control program to insure reliability of meshes used for such applications.
Standard

Procedure for the Determination of Particulate Contamination of Air in Dust Controlled Spaces by the Manual Particle Count Method
2001-03-01
HISTORICAL
ARP743B
This SAE Aerospace Recommended Practice (ARP) describes two procedures for sampling particles in dust controlled spaces. One procedure covers airborne dust above 5 μm. The other (and newly added procedure) covers particles of 25 μm and larger that “fall out” of the environment onto surfaces. In each case the particles are sized in the longest dimension and counted. Airborne particles are reported as particles per cubic meter (cubic foot) whereas particles collected in fall out samples are reported as particles per 0.1 square meter (square foot). This document includes English units in parentheses as referenced information to the SI units where meaningful. These procedures may also be used for environmental analysis where the quality of the particles by visual or chemical analysis is intended.
Standard

PROCEDURE FOR THE DETERMINATION OF PARTICULATE CONTAMINATION OF HYDRAULIC FLUIDS BY THE PARTICLE COUNT METHOD
1991-11-01
HISTORICAL
ARP598
This test describes a self-checking procedure for the determination of particulate contaminant five microns or greater in size in hydraulic fluids by the particle count method. A maximum variation of two to one (±33% of the average of two runs) in results should be expected for replicate counts on the same sample, providing that the procedure is followed closely and the precautions presented on pages 10 and 11 of the procedure, regarding manipulation, check samples and self-checking aspects, are observed.
Standard

PHYSICAL PROPERTIES OF HYDRAULIC FLUIDS
1991-11-01
HISTORICAL
AIR1362
This report presents data on hydraulic fluids which are of interest to detail designers of hydraulic systems and components for military flight vehicles. The data pertain to fluids conforming to specifications MIL-H-5606, MIL-H-8446, MIL-H-27601, and MIL-H-83282.
Standard

PARTICLE COUNT DATA CONVERSION AND EXTRAPOLATION
1993-01-01
HISTORICAL
AIR877
This report describes a mathematical model which can be used to analyze particle count data. Particle counts which fit the model can be graphically displayed. converted from one counting size-frequency range to another, and extrapolated to estimate counts beyond the measured range. Derivation, applications and calculations are described.
Standard

Methods, Locations and Criteria for System Sampling and Measuring the Solid Particle Contamination of Hydraulic Fluids
2021-05-06
CURRENT
ARP5376C
This Aerospace Recommended Practice (ARP) provides: Recommended methods for cleaning sample bottles, when used, and the solvents to be applied and how these solvents should be prepared. Recommendations for three measuring methods for determining the level of solid particle contamination of hydraulic fluids used in aerospace hydraulics. Recommendations for the selection of the sampling point, sampling method, and the sampling frequency.
Standard

Methods, Locations And Criteria For System Sampling And Measuring The Solid Particle Contamination Of Hydraulic Fluids
2010-03-08
HISTORICAL
ARP5376B
This SAE Aerospace Recommended Practice (ARP) provides procedures for assuring cleanliness of sampling equipment, for performing the sampling process, and for measuring and reporting the sample particle count. The ARP gives procedures for cleaning sample bottles, when used, and recommends the solvents to be applied and how these solvents should be prepared. Requirements for the selection of the sampling point, sampling method, and sampling frequency are also specified. This ARP also recommends three measuring methods for determining the level of solid particle contamination of hydraulic fluids used in aerospace hydraulics. These are: a on-line automatic particle counting; b automatic particle counting method using bottle samples; c microscopic particle count method using bottle samples.
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