GB 11118-2026 Hydraulic fluids（L-HL、L-HM、L-HV、L-HS and L-HG type） English, Anglais, Englisch, Inglés, えいご
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ICS
CCS
National Standard of the People's Republic of China
GB 11118-2026
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）
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Marking
5 Requirements and Test Methods
6 Inspection Rules
7 Marking, Packaging, Transport, Storage and Delivery Acceptance
Annex A (Informative) Main technical changes between this document and GB 11118.1-2011
Hydraulic oils (L-HL, L-HM, L-HV, L-HS, L-HG)
WARNING — Products covered by this document may present hazards during production, storage, transport and use if appropriate precautions are not taken. This document is not intended to address all safety concerns associated with the product. It is the responsibility of the user of this document to establish appropriate safety and health measures prior to use and to determine the applicability of relevant regulatory restrictions.
1 Scope
This document specifies the classification and marking, requirements and test methods, inspection rules, and marking, packaging, transport, storage and delivery acceptance for L-HL, L-HM (high pressure), L-HM (ordinary), L-HV, L-HS and L-HG hydraulic oils.
This document applies to hydraulic oils used in hydrostatic hydraulic systems.
2 Normative References
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB/T 260 Petroleum products — Determination of water content — Distillation method
GB/T 261 Determination of flash point — Pensky Martins closed cup method
GB/T 264 Petroleum products — Determination of acid number
GB/T 265 Petroleum products — Determination of kinematic viscosity and calculation of dynamic viscosity
GB/T 511 Petroleum, petroleum products and additives — Determination of mechanical impurities
GB/T 1884 Crude petroleum and liquid petroleum products — Laboratory determination of density — Hydrometer method
GB/T 1885 Petroleum measurement tables
GB/T 1995 Petroleum products — Calculation of viscosity index
GB/T 2433 Additives and lubricating oils containing additives — Determination of sulphated ash
GB/T 2541 Petroleum products — Tables for calculation of viscosity index
GB/T 3141 Industrial liquid lubricants — ISO viscosity classification
GB/T 3535 Petroleum products — Determination of pour point
GB/T 3536 Petroleum products — Determination of flash and fire points — Cleveland open cup method
GB/T 4756 Petroleum liquids — Manual sampling
GB/T 4945 Petroleum products and lubricants — Determination of acid and base number — Colour indicator titration method
GB/T 5096 Petroleum products — Corrosiveness to copper — Copper strip test
GB/T 6540 Petroleum products — Determination of colour
GB/T 7304 Petroleum products — Determination of acid number — Potentiometric titration method
GB/T 7305 Petroleum and synthetic fluids — Determination of water separability
GB/T 7631.2 Lubricants, industrial oils and related products (Class L) — Classification — Part 2: Family H (Hydraulic systems)
GB/T 8021 Petroleum products — Determination of saponification number
GB/T 11133 Petroleum products, lubricants and additives — Determination of water content — Coulometric Karl Fischer titration method
GB/T 11143 Inhibited mineral oils — Determination of rust prevention characteristics in the presence of water
GB/T 12579 Lubricating oils — Determination of foaming characteristics
GB/T 12581 Inhibited mineral oils — Determination of oxidation characteristics
GB/T 14039 Hydraulic fluid power — Fluids — Method for coding the level of contamination by solid particles
GB/T 30515 Transparent and opaque liquids — Determination of kinematic viscosity and calculation of dynamic viscosity
DL/T 432 Determination of particulate contamination in oil for electric power
NB/SH/T 0164 Packaging, storage, transport and delivery acceptance of petroleum and related products
NB/SH/T 0189 Lubricants — Determination of antiwear properties — Four ball method
NB/SH/T 0193 Lubricants — Determination of oxidation stability — Rotary pressure vessel method
NB/SH/T 0210 Hydraulic fluids — Determination of filterability
NB/SH/T 0301 Hydraulic fluids — Determination of hydrolytic stability — Glass bottle method
NB/SH/T 0306 Lubricants — Determination of load carrying capacity — FZG visual method
NB/SH/T 0878 Hydraulic fluids — Evaluation of performance — Double pump test method T6H20C
SH/T 0103 Polymeric lubricants — Determination of shear stability — Diesel injector nozzle method
SH/T 0209 Hydraulic fluids — Determination of thermal stability
SH/T 0305 Petroleum products — Determination of seal compatibility index
SH/T 0307 Petroleum based hydraulic fluids — Determination of wear characteristics — Vane pump method
SH/T 0308 Lubricants — Determination of air release value
SH/T 0361-1998 Guide way oils
SH/T 0565 Inhibited mineral oils — Determination of sludge and corrosion tendency
SH/T 0604 Crude petroleum and petroleum products — Determination of density — Oscillating U tube method
3 Terms and definitions
No terms and definitions need to be defined in this document.
4 Classification and marking
4.1 Product classification
Hydraulic oil products are classified according to GB/T 7631.2 into six varieties: L-HL anti oxidation and anti rust hydraulic oil, L-HM (high pressure) anti wear hydraulic oil, L-HM (ordinary) anti wear hydraulic oil, L-HV low temperature hydraulic oil, L-HS ultra low temperature hydraulic oil, and L-HG hydraulic guide way oil.
The viscosity grade classification of each variety of hydraulic oil product shall be carried out in accordance with GB/T 3141.
4.2 Product marking
Hydraulic oil marking is as follows: variety code viscosity grade product name standard number
Examples:
L-HL 46 anti oxidation and anti rust hydraulic oil GB 11118.1
L-HM 46 (high pressure) anti wear hydraulic oil GB 11118.1
L-HM 46 (ordinary) anti wear hydraulic oil GB 11118.1
L-HV 46 low temperature hydraulic oil GB 11118.1
L-HS 46 ultra low temperature hydraulic oil GB 11118.1
L-HG 46 hydraulic guide way oil GB 11118.1
5 Requirements and test methods
The technical requirements and test methods for each variety of hydraulic oil shall comply with the provisions of Tables 1 to 5.
6 Inspection rules
6.1 Classification of inspection and inspection items
6.1.1 Factory inspection
Factory inspection items include: density, kinematic viscosity, colour, appearance, viscosity index, pour point, acid number, water content, mechanical impurities, copper strip corrosion, liquid phase rust, foam characteristics, air release value, water separability, sulphated ash, flash point, saponification number, shear stability, seal compatibility index, wear scar diameter, hydrolytic stability, thermal stability, filterability, rotary pressure vessel oxidation stability test, stick slip characteristics and gear machine test.
Among these, density, kinematic viscosity, colour, appearance, viscosity index, pour point, acid number, water content, mechanical impurities, copper strip corrosion, liquid phase rust, foam characteristics, air release value, water separability and sulphated ash shall be subject to factory inspection on a batch by batch basis. For the nine test items of flash point, saponification number, shear stability, seal compatibility index, wear scar diameter, hydrolytic stability, thermal stability, filterability and rotary pressure vessel oxidation stability test, where there are no changes in raw materials or production processes that may affect product quality, testing shall be carried out at least once per year. For the three test items of oxidation stability test, stick slip characteristics and gear machine test, where there are no changes in raw materials or production processes that may affect product quality, testing shall be carried out at least once every four years.
6.1.2 Type inspection
Type inspection items are all items specified in the technical requirements of Clause 5.
Type inspection shall be carried out under the following circumstances:
a)When a new product is put into production or a product type is approved;
b)When significant changes occur in raw materials, production processes, etc., that may affect product quality;
c) When there is a large difference between factory inspection results and previous type inspection results.
6.2 Batch formation
Under the conditions of unchanged raw materials and production processes, each tank or kettle of product produced constitutes one batch.
6.3 Sampling
Sampling shall be carried out in accordance with GB/T 4756. The sample quantity shall be sufficient to meet the requirements for factory inspection or type inspection and for retained samples.
6.4 Determination rules
If the factory inspection and type inspection results comply with the technical requirements of Clause 5, the batch of product shall be judged as qualified.
6.5 Retest rules
