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Water contamination in engine oils and hydraulic fluids degrades additives, accelerates oxidation, and reduces lubricating film strength, leading to catastrophic mechanical wear.

An electric mantle or gas burner provides controlled heating. Electric mantles are preferred in modern laboratories to minimize fire hazards associated with flammable solvents. Step-by-Step Test Procedure

A Redline edition is a special version of the ASTM standard that shows with red markings. This is particularly valuable for:

): The difference between two single and independent results obtained by different operators working in different laboratories on identical test material. Astm D95 Pdf

: The results are reported as the percentage of water and sediment in the crude oil sample.

High-precision trace water analysis in refined products, turbine oils, and solvents. 7. Accessing the Official ASTM D95 PDF

(below 0.02%). For ultra-low water levels, labs typically switch to Karl Fischer Titration (ASTM D6304) Quick Reference Guide Water contamination in engine oils and hydraulic fluids

If the cooling water is too warm, water vapor escapes out of the top of the apparatus, resulting in underestimated water content.

The method relies on . Here is a step-by-step breakdown of the process described in the ASTM D95 PDF:

Purchase and download the most recent version directly from the ASTM standard store. Step-by-Step Test Procedure A Redline edition is a

The sample is heated under reflux with a water-immiscible solvent (such as xylene or petroleum naphtha).

Water pockets can foster the growth of bacteria and fungi that clog filters.

Looking for more? Pair the ASTM D95 PDF with ASTM D4177 (Sampling) and ASTM D4057 (Manual Sampling of Petroleum) for a complete water analysis protocol.