GB 440-1977Aviation lubricating oil No.20 (English PDF)
20号航空润滑油
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Issued by
SBSM
Level / Type
National · Mandatory
Issue date
November 30, 1977
Implementation date
January 1, 1978
Scope
GB 440-1977 is the English-translated version of 20号航空润滑油.
GB 440-1977 specifies the quality requirements for No. 20 aviation lubricating oil produced by the solvent refining process, from the raw materials and by the process used for the samples that passed the State engine test.
Its single table of requirements sets limits for kinematic viscosity at 100 °C (not less than 20 cSt) and the 50 °C/100 °C viscosity ratio, carbon residue, acid value, ash, selective solvent, water-soluble acids or alkalis, mechanical impurities, water, closed-cup flash point, pour point, colour after dilution with kerosene, density at 20 °C, thermal oxidation stability at 250 °C, corrosion and viscosity-temperature coefficient, each tied to a GB or SY test method.
Packaging, marking, storage, transport and delivery acceptance follow SYB 2000-62 S, and 2 L is sampled to SY 2001-77 for inspection and retention.
It replaces GB 440-64; Amendment No. 1 of 1988 deletes the designation code HH-20 and incorporates the viscosity-temperature coefficient method GB 389-77 as supplementary Annex A. It was issued on 30 November 1977 and has been in force since 1 January 1978.
Classification: ICS 75.100, CCS E34. The document runs to 3 pages, delivered complete in English translation.
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Document preview — GB 440-1977
National Standard of the People's Republic of China
- ICS
- 75.100
- Classification
- E34
- Replacing
- GB 440-64
Issued by: State Bureau of Standards and Metrology
Contents
- Foreword
- 1 Technical requirements
- 2 Packaging, marking, storage, transport and delivery acceptance
- 3 Sampling
- Amendment No. 1
Foreword
This standard applies to aviation lubricating oil produced by the solvent refining process. The product is manufactured from the raw materials and by the production process used for the samples that passed the State engine test. Its designation code is HH-20.
Issued by the State Bureau of Standards and Metrology; implemented on 1 January 1978. This standard replaces GB 440-64.
1 Technical requirements
The product shall meet the following requirements (item - quality indicator - test method):
Kinematic viscosity (100 °C), cSt, not less than: 20 - GB 265-75.
Kinematic viscosity ratio (nu50 °C/nu100 °C), not more than: 7.80 - GB 265-75.
Carbon residue, %, not more than: 0.3 - GB 268-77.
Acid value, mg KOH/g, not more than: 0.03 - GB 264-77.
Ash, %, not more than: 0.003 - GB 508-65.
Selective solvent: none - GB 504-77.
Water-soluble acids or alkalis: none - GB 259-77.
Mechanical impurities: none - GB 511-77.
Water: none - GB 260-77.
Flash point (closed cup), °C, not lower than: 230 - GB 261-77.
Pour point, °C, not higher than: -18 - GB 510-77.
Colour, diluted with 85% (by volume) colourless kerosene, mm, not less than: 15 - SY 2614-56.
Density (20 °C), g/cm3, not more than: 0.895 - SY 2206-76.
Thermal oxidation stability (250 °C), min, not less than: 25 - SY 2618-66.
Corrosion, g/m2, not more than: 45 - GB 391-77.
Viscosity-temperature coefficient, not more than: 55 - GB 389-77.
2 Packaging, marking, storage, transport and delivery acceptance
Packaging, marking, storage, transport and delivery acceptance of this product shall be carried out in accordance with SYB 2000-62 S.
3 Sampling
Sampling shall be carried out in accordance with SY 2001-77; 2 L shall be taken for inspection and as a retained sample.
Amendment No. 1
Amendment No. 1 to GB 440-1977, Aviation lubricating oil No. 20, was approved by the State Bureau of Standards on 16 May 1988 by document Guo Biao Fa Bian Zi [1988] No. 092, and has been in effect since 1 December 1988.
I. In the foreword: "Its designation code is HH-20." is deleted.
II. In the technical requirements: the test method for the item viscosity-temperature coefficient, "GB 389", is changed to "Annex A"; and GB 389-77, Method for determination of the viscosity-temperature coefficient of lubricating oils, is made Annex A (supplementary) of this standard.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 3 pages — is available in the English PDF.
Referenced standards
Normative references
GB 265-75 · GB 268-77 · GB 264-77 · GB 508-65 · GB 504-77 · GB 259-77 · GB 511-77 · GB 260-77 · GB 261-77 · GB 510-77 · SY 2614-56 · SY 2206-76 · SY 2618-66 · GB 391-77 · GB 389-77 · SYB 2000-62 S · SY 2001-77
Similar standards
Editions of GB 440
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB 440-1977 | Aviation lubricating oil No.20 | current edition | Current |
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