ISO 12922:2020
Lubricants, industrial oils and related products (class L) — Family H (hydraulic systems) — Specifications for hydraulic fluids in categories HFAE, HFAS, HFB, HFC, HFDR and HFDU

Standard No.

ISO 12922:2020

Release Date

2020

Published By

International Organization for Standardization (ISO)

Latest

ISO 12922:2020

Scope

This document specifies the minimum requirements of unused fire-resistant and less flammable hydraulic fluids for hydrostatic and hydrodynamic systems in general industrial applications. It is not intended for use in aerospace or power-generation applications, where different requirements apply. It provides guidance for suppliers and end users of these less hazardous fluids and to the manufacturers of hydraulic equipment in which they are used. Of the categories covered by ISO 6743-4, which classifies the different types of fluids used in hydraulic applications, only the following are detailed in this document: HFAE, HFAS, HFB, HFC, HFDR and HFDU. Types HFAE, HFAS, HFB, HFC and HFDR are "fire-resistant" fluids as defined by ISO 5598. Most HFDU fluids, while displaying an improvement in combustion behaviour over mineral oil, fall outside this definition and are more appropriately considered as "less flammable" fluids.

ISO 12922:2020 Referenced Document

• EN 14832 Petroleum and related products - Determination of the oxidation stability and corrosivity of fire-resistant phosphate ester fluids
• EN 14833 Petroleum and related products - Determination of the hydrolytic stability of fire-resistant phosphate ester fluids
• ISO 12185 Crude petroleum, petroleum products and related products*， 2024-01-01 Update
• ISO 14635-1 Gears — FZG test procedures — Part 1: FZG test method A/8,3/90 for relative scuffing load-carrying capacity of oils*， 2023-07-01 Update
• ISO 14935 Petroleum and related products — Determination of wick flame persistence of fire-resistant fluids*， 2020-04-16 Update
• ISO 15029-1 Petroleum and related products - Determination of spray ignition characteristics of fire-resistant fluids - Part 1: Spray flame persistence - Hollow-cone nozzle method
• ISO 15029-2 Petroleum and related products - Determination of spray ignition characteristics of fire-resistant fluids - Part 2: Spray test - Stabilised flame heat release method
• ISO 20623 Petroleum and related products - Determination of the extreme-pressure and anti-wear properties of lubricants - Four-ball method (European conditions)
• ISO 20763 Petroleum and related products - Determination of anti-wear properties of hydraulic fluids - Vane pump method
• ISO 20764 Petroleum and related products - Preparation of a test portion of high-boiling liquids for the determination of water content - Nitrogen purge method
• ISO 20783-1 Petroleum and related products - Determination of emulsion stability of fire-resistant fluids - Part 1: Fluids in category HFAE
• ISO 20783-2 Petroleum and related products - Determination of emulsion stability of fire-resistant fluids - Part 2: Fluids in category HFB
• ISO 20823 Petroleum and related products - Determination of the flammability characteristics of fluids in contact with hot surfaces - Manifold ignition test
• ISO 20843 Petroleum and related products. Determination of pH of fire-resistant fluids within categories HFAE, HFAS and HFC
• ISO 20844 Petroleum and related products - Determination of the shear stability of polymer-containing oils using a diesel injector nozzle
• ISO 2160 Petroleum products - Corrosiveness to copper - Copper strip test
• ISO 3104 Petroleum products — Transparent and opaque liquids — Determination of kinematic viscosity and calculation of dynamic viscosity*， 2023-10-01 Update
• ISO 3170 Petroleum liquids - Manual sampling
• ISO 3448 Industrial liquid lubricants - ISO vicosity classification; Technical Corrigendum 1
• ISO 3675 Crude petroleum and liquid petroleum products — Laboratory determination of density — Hydrometer method — Amendment 1
• ISO 4259-2 Petroleum and related products — Precision of measurement methods and results — Part 2: Interpretation and application of precision data in relation to methods of test AMENDMENT 1
• ISO 4263-2 Petroleum and related products - Determination of the ageing behaviour of inhibited oils and fluids; TOST test - Part 2: Procedure for category HFC hydraulic fluids
• ISO 4263-3 Petroleum and related products - Determination of the ageing behaviour of inhibited oils and fluids using the TOST test - Part 3: Anhydrous procedure for synthetic hydraulic fluids
• ISO 4404-1 Petroleum and related products - Determination of the corrosion resistance of fire-resistant hydraulic fluids - Part 1: Water-containing fluids
• ISO 4404-2 Petroleum and related products - Determination of the corrosion resistance of fire-resistant hydraulic fluids - Part 2: Non-aqueous fluids
• ISO 5598 Fluid power systems and components — Vocabulary
• ISO 6072 Rubber - Compatibility between hydraulic fluids and standard elastomeric materials
• ISO 6247 Petroleum products - Determination of foaming characteristics of lubricating oils; Technical Corrigendum 1
• ISO 6296:2000 Petroleum products - Determination of water - Potentiometric Karl Fischer titration method
• ISO 6618 Petroleum products and lubricants - Determination of acid or base number - Coulour-indicator titration method; Technical Corrigendum 1
• ISO 6619 Petroleum products and lubricants; neutralization number; potentiometric titration method
• ISO 6743-4 Lubricants, industrial oils and related products (class L) - Classification - Part 4: Family H (Hydraulic systems)
• ISO 7120 Petroleum products and lubricants; Petroleum oils and other fluids; Determination of rust-preventing characteristics in the presence of water
• ISO 760 Determination of water; Karl Fischer method (General method)
• ISO 7745 Hydraulic fluid power*， 2024-01-01 Update
• ISO 9120 Petroleum and related products — Determination of air-release properties of steam turbine and other oils — Impinger method — Amendment 1

ISO 12922:2020 history

• 2020 ISO 12922:2020 Lubricants, industrial oils and related products (class L) — Family H (hydraulic systems) — Specifications for hydraulic fluids in categories HFAE, HFAS, HFB, HFC, HFDR and HFDU
• 2012 ISO 12922:2012 Lubricants, industrial oils and related products (class L) - Family H (Hydraulic systems) - Specifications for hydraulic fluids in categories HFAE, HFAS, HFB, HFC, HFDR and HFDU
• 2001 ISO 12922:1999/Cor 1:2001 Lubricants, industrial oils and related products (class L) - Family H (Hydraulic systems) - Specifications for categories HFAE, HFAS, HFB, HFC, HFDR and HFDU; Technical Corrigendum 1
• 1999 ISO 12922:1999 Lubricants, industrial oils and related products (class L) - Family H (Hydraulic systems) - Specifications for categories HFAE, HFAS, HFB, HFC, HFDR and HFDU