SH/T 0257-1992 Qualitative Test Method for Water in Lubricating Oils

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full title / English name / replacement relationship

• Standard number: SH/T 0257-92
• Chinese title: Qualitative Test Method for Water in Lubricating Oils
• English title: not provided in the available source
• Replacement relationship: replaces SYB 2613-56(82)
• Other: confirmed in 2004; approved by China Petrochemical Corporation 1992-05-20, implemented on 1992-05-20

2. Scope of application and non-applicability

• Scope of application: This standard applies to lubricating oils.
• Non-applicability: not provided in the available source.

3. Method principle

Heat the test sample to the specified temperature and qualitatively determine whether water is present in the sample by listening for sound.

4. Reagents and materials (purity / preparation)

• Mineral oil: pour mineral oil with a flash point not lower than 240℃ into the oil bath to a height of 80 mm (4.1).
• Other reagents: not provided in the available source.

5. Apparatus and equipment

• 3.1 Oil bath: a cylindrical container with a diameter of about 100 mm and a height of about 90 mm, and with a metal cover; at the center of the cover, a metal support rod connects from the inside of the cover to a metal disk, this disk being 80 mm from the underside of the cover and about 10 mm from the bottom of the bath. The cover has holes corresponding to the holes in the disk, for installing the thermometer and test tube.
• 3.2 Test tube: diameter 10—15 mm, height 120—150 mm.
• 3.3 Thermometer: 0—200℃.
• 3.4 Gas burner or other heating apparatus.

6. Recommended operating conditions

• Oil bath heating temperature: 175℃±5℃ (4.1).
• Test sample heating end temperature: 150℃ (5).
• Repeat test judgment temperature: 130℃ (6.3).
• Other conditions: not provided in the available source.

7. Sampling and test sample preparation

• 4.2 At room temperature, pour the test sample into a glass test tube to a height of 80—90 mm; this test tube should be carefully washed and dried in advance.
• Insert the dried thermometer into a cork stopper, then stopper the test tube with this cork stopper so that the thermometer mercury bulb is located in the center of the test tube and is about 20—30 mm high from the bottom of the test tube.

8. Analysis procedure

• 5 Insert the test tube containing the test sample vertically into the hot oil bath, and carefully observe the test tube and test sample for several minutes until the test sample temperature reaches 150℃.
• If water is present in the test sample, foaming occurs, a crackling sound can be heard, and the test tube may even vibrate or tremble, and the oil layer above the bath surface will become turbid.

9. Qualitative and quantitative determination and calculation formula

• 6.1 If no fewer than two distinct sounds are heard, water is determined to be present.
• 6.2 If the following situations occur in the first test, the test should be performed again:
  • 6.2.1 one distinct sound and foam occur;
  • 6.2.2 an indistinct sound and foam occur;
  • 6.2.3 only foam occurs.
• 6.3 If in the repeat test there is still one distinct sound and foam, water is considered to be present; if when the temperature in the test tube reaches 130℃ there is only an indistinct sound and foam, or only foam, then the test sample is considered to contain no water.
• Calculation formula: not provided in the available source.

10. Precision

not provided in the available source.

11. Report

not provided in the available source.

12. Referenced documents

• Reference adoption of the former Soviet Union national standard ГОСТ 1547-42 "Qualitative Determination Method for Water in Lubricating Oils".
• Other referenced documents: not provided in the available source.

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick-reference Q&A