GB440-1977

Aviation lubricating oil No.20

20号航空润滑油

GB 440-1977 es una norma nacional china obligatoria vigente: Aviation lubricating oil No.20. Sector: Maquinaria. Enfoque: Eficiencia energética. Entrada en vigor: 1 ene 1978.

La aplicabilidad depende del alcance del producto, la vía de certificación, los avisos de la autoridad competente y las reglas de transición. Solicite una traducción o verifique la fuente antes de usar esta ficha en una decisión de cumplimiento.

Resumen de cumplimiento

Este resumen está disponible por ahora solo en inglés.

Alcance y aplicabilidad

This standard applies to 20# aviation lubricating oil (previously designated as HH-20) produced through a solvent refining process. It is specifically designed for aviation applications and mandates that production follows the raw materials and processes approved through national test runs. This standard is mandatory for manufacturers producing aviation lubricants for the Chinese market.

Requisitos técnicos

GB 440-1977 specifies stringent physical and chemical requirements for aviation lubricating oil. The standard regulates critical performance parameters including kinematic viscosity at 100°C, viscosity ratio, and carbon residue limits to ensure optimal lubrication under extreme operating conditions. Additionally, the standard enforces strict purity and safety thresholds. It mandates the complete absence of selective solvents, water-soluble acids or alkalis, mechanical impurities, and moisture. The oil must also meet precise flash point and solidification point criteria to guarantee safe operation across varying thermal environments. Further requirements cover thermal oxidation stability at elevated temperatures, corrosion degree, and density limits. The standard also dictates specific color metrics when diluted with kerosene. Manufacturers must ensure their products meet all these specified quality indicators without compromise.

Métodos de ensayo

The standard outlines various testing procedures to verify compliance, referencing several Chinese national and industry standards. Key evaluations include kinematic viscosity and viscosity ratio tests (GB 265-75), carbon residue determination (GB 268-77), and flash point testing using a closed cup method (GB 261-77). Other critical assessments involve thermal oxidation stability and corrosion degree measurements to ensure long-term reliability and material compatibility.

Preguntas frecuentes

What products are regulated under GB 440-1977?

This standard applies to 20# aviation lubricating oil (previously designated as HH-20) produced via solvent refining. It is primarily used for lubricating aircraft engines and related aviation machinery.

Are there any updates from the previous version of GB 440-1977?

The standard was updated in 1988. The primary changes included the removal of the "HH-20" designation from the scope, and the testing method for the viscosity-temperature coefficient was changed from GB 389-77 to a newly added Appendix A.

How does GB 440-1977 handle testing methods and international equivalents?

The standard relies heavily on Chinese national (GB) and petroleum industry (SY) test method standards, such as GB 265-75 for kinematic viscosity and GB 261-77 for flash point. Engineers must cross-reference these referenced Chinese testing standards to ensure full procedural compliance.

The summary above provides a high-level overview of GB 440-1977. To ensure complete compliance for your aviation lubricants entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 440-1977 today to access all detailed parameters, tables, and testing procedures.

Indicaciones de aplicabilidad

Tipo: Producto
CCS: E34
ICS: 75.100
Organismo competente: National Energy Administration
Comité técnico: National Energy Administration

Relaciones

Sustituye a:GB 440-1964