ASTM D4898-16 PDF

Scope: 4.1 This test method indicates and measures the amount of insoluble contamination of hydraulic fluids. Minimizing the levels of insoluble contamination of hydraulic fluids is essential for the satisfactory performance and long life of the equipment. Insoluble contamination can not only plug filters but can damage functional system components resulting in wear and eventual system failure.

1.1 This test method covers the determination of insoluble contamination in hydraulic fluids by gravimetric analysis. The contamination determined includes both particulate and gel-like matter, organic and inorganic, which is retained on a membrane filter disk of pore diameter as required by applicable specifications (usually 0.45 μm or 0.80 μm).

1.2 To indicate the nature and distribution of the particulate contamination, the gravimetric method should be supplemented by occasional particle counts of typical samples in accordance with Test Method F312.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific warning statement, see 6.1.

ASTM D4898-16 Referenced Document

ASTM A555/A555M Standard Specification for General Requirements for Stainless Steel Wire and Wire Rods
ASTM D1836 Standard Specification for Commercial Hexanes
ASTM D2021
ASTM E319 Standard Practice for the Evaluation of Single-Pan Mechanical Balances
ASTM F302 Standard Practice for Field Sampling of Aerospace Fluids in Containers
ASTM F303 Standard Practices for Sampling Aerospace Fluids from Components
ASTM F312 Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
ASTM F314 Methods of Test for Identification of Metallic and Fibrous Contaminants in Aerospace Fluids

2023 ASTM D4898-23 Standard Test Method for Insoluble Contamination of Hydraulic Fluids by Gravimetric Analysis
2016 ASTM D4898-16 Standard Test Method for Insoluble Contamination of Hydraulic Fluids by Gravimetric Analysis
1990 ASTM D4898-90(2010)e1 Standard Test Method for Insoluble Contamination of Hydraulic Fluids by Gravimetric Analysis
1990 ASTM D4898-90(2010) Standard Test Method for Insoluble Contamination of Hydraulic Fluids by Gravimetric Analysis
1990 ASTM D4898-90(2005) Standard Test Method for Insoluble Contamination of Hydraulic Fluids by Gravimetric Analysis
1990 ASTM D4898-90(2000)e1 Standard Test Method for Insoluble Contamination of Hydraulic Fluids by Gravimetric Analysis