GB11118-2026
Hydraulic fluids（L-HL、L-HM、L-HV、L-HS and L-HG type）
液压油（L-HL、L-HM、L-HV、L-HS、L-HG）
GB 11118-2026 is an upcoming mandatory Chinese national standard for Hydraulic fluids（L-HL、L-HM、L-HV、L-HS and L-HG type）. It appears in the Chemicals compliance cluster with a energy efficiency focus and has an implementation date of Feb 1, 2027.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard establishes the classification, technical requirements, and testing protocols for hydraulic fluids utilized in fluid static pressure hydraulic systems. It specifically applies to six product categories: L-HL (anti-oxidation and anti-rust), L-HM (anti-wear, including high-pressure and general grades), L-HV (low-temperature), L-HS (ultra-low-temperature), and L-HG (hydraulic guide rail) oils. Manufacturers and suppliers of industrial hydraulic systems must ensure their lubricants meet these specifications for the Chinese market.
Technical requirements
The standard comprehensively specifies the physical and chemical property requirements for each category of hydraulic fluid across various ISO viscosity grades. Core parameters regulated include kinematic viscosity, pour point, flash point, foaming characteristics, and water content. For anti-wear grades (L-HM, L-HV, L-HS), the standard mandates strict performance metrics for thermal stability, hydrolytic stability, and shear stability to ensure operational reliability under high stress. Specific limits for wear prevention are evaluated through demanding mechanical tests, ensuring the fluid protects hydraulic pumps and components effectively. Additionally, the standard outlines requirements for oxidation stability, demulsibility, and air release values. It also dictates that cleanliness levels must be determined through mutual agreement between the supplier and the buyer, referencing specific methodologies outlined in DL/T 432 or GB/T 14039.
Testing methods
To verify compliance, the standard references a comprehensive suite of Chinese national and industry-standard testing methods. Key evaluations include the FZG gear machine test for load-carrying capacity, the T6H20C double pump test for anti-wear performance, and the four-ball method for wear scar diameter. Chemical and physical properties are assessed using standardized methods for rust prevention, copper strip corrosion, and foam tendency. Engineers must cross-reference these testing protocols to ensure their laboratory evaluations align with Chinese regulatory expectations. The standard also details specific arbitration methods in case of testing disputes, such as using GB/T 265 for kinematic viscosity.
FAQs
What products are regulated under GB 11118-2026?
This standard regulates hydraulic fluids used in fluid static pressure hydraulic systems, specifically categorized into L-HL, L-HM (high pressure and general), L-HV, L-HS, and L-HG types.
Are there any updates from the previous version of GB 11118?
The 2026 version replaces GB 11118.1-2011. Key updates include revised testing footnotes for moisture, appearance, and kinematic viscosity, changes to the T6H20C double pump test requirements (where plunger total weight loss is now reported rather than strictly limited), and adjustments to the periodic inspection rules for batch and type testing.
How does GB 11118-2026 differ from ISO standards?
The standard heavily references Chinese national (GB/T) and petroleum industry (SH/T, NB/SH/T) test standards. While it aligns with international categorization principles like ISO viscosity grades, engineers must verify compliance using the specific Chinese testing methodologies outlined in the standard's normative references.
The summary above provides a high-level overview of GB 11118-2026. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 11118-2026 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- E39
- ICS
- 75.120
- Competent department
- National Energy Administration
- Technical committee
- National Technical Committee on Petroleum Products and Lubricants of Standardization Administration of China
Relationships
Replaces:GB 11118.1-2011 (Current)