Standard No.:	GB 11118-2026
English Name:	Hydraulic fluids（L-HL、L-HM、L-HV、L-HS and L-HG type）
Chinese Name:	液压油（L-HL、L-HM、L-HV、L-HS、L-HG）
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR;SAC
Issued on:	2026-01-28
Implemented on:	2027-2-1
Status:	to be valid
Superseding:	GB 11118.1-2011 Hydraulic fluids of L-HL、L-HM、L-HV、L-HS and L-HG type
Target Language:	English
File Format:	PDF
Word Count:	12000 words
Translation Price(USD):	360.0
Delivery:	via email in 1~5 business day

GB 11118-2026 Hydraulic fluids（L-HL、L-HM、L-HV、L-HS and L-HG type） English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. 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 — PenskyMartins 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 — Colourindicator 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 — Fourball 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 Petroleumbased 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 Utube 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 antioxidation and antirust hydraulic oil, L-HM (high pressure) antiwear hydraulic oil, L-HM (ordinary) antiwear hydraulic oil, L-HV lowtemperature hydraulic oil, L-HS ultralowtemperature 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 antioxidation and antirust hydraulic oil GB 11118.1 L-HM 46 (high pressure) antiwear hydraulic oil GB 11118.1 L-HM 46 (ordinary) antiwear hydraulic oil GB 11118.1 L-HV 46 lowtemperature hydraulic oil GB 11118.1 L-HS 46 ultralowtemperature 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, stickslip 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 batchbybatch 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, stickslip 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