SH/T 0452-1992 Lubricating grease storage stability test method

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 name / English name / replacement relationship

• Standard number: SH/T 0452-92 (confirmed in 2004)
• Chinese name: Lubricating grease storage stability test method
• English name: not provided in the available source
• Replacement relationship: replaces SY 4028-84
• Equivalent adoption: United States Federal Test Method Standard FS 791 c3467.1(1986) "Lubricating grease storage stability test method" (the original wording is "equivalent adoption")

2. Scope of application and non-applicability

• This standard specifies the test method for storage stability of lubricating grease.
• This standard is applicable to determining the stability of lubricating grease after storage for a certain period under elevated temperature conditions.
• Not applicable: not provided in the available source.

3. Method principle

After the lubricating grease has been stored under specified conditions, its consistency (unworked and worked penetration) is measured, and the penetration values before and after storage are compared. Note: In lubricating grease specifications that cite this method, the storage time and temperature for the storage test of that grease must be given.

4. Reagents and materials (purity / preparation)

• 4.1 Aluminum foil: commercially available.
• Other reagents: not provided in the available source.

5. Apparatus and equipment

• 5.1 Two standard grease cups, grease worker, penetrometer, etc. (see GB/T 269).
• 5.2 Constant-temperature oven: natural convection type.
• Other equipment: not provided in the available source.

6. Recommended operating conditions

• Test temperature: not provided in the available source (specified by the lubricating grease specification that cites this method).
• Storage time: not provided in the available source (specified by the lubricating grease specification that cites this method).
• Cooling temperature after storage: cool to 25℃ (the original text is "259C", requires confirmation against the source standard (source-text extraction)).

7. Sampling and specimen preparation

• Specimen about 1 kg, sufficient to fill two standard grease cups.
• 7.1 Fill one standard grease cup with the specimen, scrape off excess grease, and ensure that the grease surface is level with the cup opening (used as the specimen for determining unworked penetration, see clause 7.6).
• 7.2 Place enough specimen into another standard grease cup, ensuring that the specimen is filled above the cup opening (used as the specimen for determining worked penetration, see clause 7.6).
• 7.3 Cover the specimen with aluminum foil.

8. Analytical procedure

• 7.4 Place the grease cup containing the specimen into the constant-temperature oven and store at the specified test temperature for the specified time.
• 7.5 After the storage period ends, remove the grease cup from the constant-temperature oven and cool to 25℃ (the original text is "259C", requires confirmation against the source standard (source-text extraction)).
• 7.6 Determine the worked and unworked penetration of the specimen in accordance with GB/T 269.

9. Qualitative and quantitative determination and calculation formula

• Report the change in penetration of the specimen before and after storage to evaluate the storage stability of the specimen.
• Calculation formula: not provided in the available source.

10. Precision

Not provided in the available source.

11. Report

Report the change in penetration of the specimen before and after storage to evaluate the storage stability of the specimen.

12. Referenced documents

• GB/T 269 Determination of penetration of lubricating grease and petrolatum (the source transcription of the test name is unclear; verify it against the original standard)

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