ISO 22285-2018 PDF

Full title and description

Petroleum products and lubricants — Determination of oil separation from grease — Pressure filtration method (ISO 22285:2018). This International Standard defines a laboratory procedure to measure the quantity of oil that separates from a lubricating grease under specified test conditions using a pressure‑filtration apparatus to collect and weigh the separated oil.

Abstract

ISO 22285:2018 specifies a pressure‑filtration test method for measuring oil separation from lubricating greases. The method is intended to predict grease behaviour during storage (for example in pails and drums) and to provide reproducible laboratory results for quality control and specification purposes. The method is not applicable to very soft greases that flow unchanged through the test sieve.

General information

• Status: Published (International Standard, stage confirmed).
• Publication date: 25 October 2018 (ISO publication date; edition published 2018‑11).
• Publisher: International Organization for Standardization (ISO), prepared by ISO/TC 28.
• ICS / categories: 75.100 — Lubricants, industrial oils and related products.
• Edition / version: Edition 1 (2018).
• Number of pages: 9 pages (ISO published document length).

Scope

Specifies a laboratory pressure‑filtration procedure to determine the mass fraction of oil separated from lubricating greases under specified temperature and time conditions. The method is intended for assessing oil bleeding under static/storage conditions (e.g., greases held in pails or drums) and is not designed to predict separation under dynamic service conditions. The procedure excludes very soft/flowable greases that pass unchanged through the woven wire cloth during the test.

Key topics and requirements

• Test principle — grease is placed on a stainless‑steel woven‑wire cone or gauze in a separation cup and subjected to a defined temperature and pressure; oil that passes through the mesh is collected and weighed to calculate the separated oil mass fraction (% w/w).
• Apparatus essentials — separation cup and cone (specified mesh/aperture), receiver (oil cup), metal weight (typically 100 g), oven or thermostatic chamber, precision balance and cleaning solvents; dimensional and material requirements for components are defined in the standard.
• Test conditions and variants — the standard supports long and short test variants and a range of test temperatures used in practice (commonly in the 40 °C to 120 °C range in harmonized/adopted national versions); long tests commonly use up to 168 h while some short tests are used for production control — national/adopted versions (DIN, IP) document short/long test options and typical temperature choices.
• Result expression and repeatability — separated oil reported as a mass fraction (%) with guidance on repeat tests (replicates) and averaging; precision information is given or referenced for typical applications.
• Limitations and applicability — not suitable for very soft greases that flow through the gauze; the test evaluates static/storage oil separation and does not simulate dynamic service bleeding.

Typical use and users

Used by lubricant and grease manufacturers, materials and quality‑control laboratories, test houses, OEM specification teams and procurement/specification authors to assess oil‑separation tendencies for storage stability and product specification. Laboratories apply the method for routine QC, formulation development and comparative assessments between grease grades or batches.

Related standards

Standards and methods commonly referenced alongside ISO 22285 include ISO 22286 (dropping point of grease — automatic apparatus), national/adopted versions such as DIN ISO 22285 (adoption and editorial variants of ISO 22285), older or equivalent test methods like IP 121 (Institute of Petroleum) and DIN 51817, and other oil‑separation or grease test methods in ASTM and national collections; these documents are often used together for a rounded grease test program.

Keywords

oil separation; grease; lubricating grease; oil‑bleeding; pressure filtration; separation cup; mesh/gauze; storage stability; lubricants testing; ISO 22285.

FAQ

Q: What is this standard?

A: ISO 22285:2018 is an International Standard that specifies a pressure‑filtration laboratory method to determine the amount of oil that separates from lubricating greases under defined test conditions.

Q: What does it cover?

A: It covers the principle, apparatus, test procedure, result calculation and reporting for oil separation by pressure filtration, including limitations and recommended test variants for storage‑related evaluations (short and long durations, specified temperatures, and apparatus requirements). It does not aim to predict dynamic in‑service bleeding.

Q: Who typically uses it?

A: Grease and lubricant manufacturers, independent test laboratories, quality control and R&D teams, standards writers and OEMs specifying grease performance for storage and handling are the primary users.

Q: Is it current or superseded?

A: ISO 22285:2018 is published and its status has been confirmed in the ISO lifecycle review; the ISO record shows it as a published international standard (stage 90.93, confirmed). Users should check national adoption updates (e.g., DIN, BS, NF adoptions) for local published editions or consolidated versions.

Q: Is it part of a series?

A: It sits within the suite of ISO/TC 28 standards for petroleum products and lubricants (ICS 75.100) and is commonly used alongside related grease standards such as ISO 22286 (dropping point) and other test methods (national and ASTM equivalents) for comprehensive grease characterization.

Q: What are the key keywords?

A: Key keywords are: oil separation, grease, bleeding, pressure filtration, separation cup, storage stability, lubricating grease, ISO 22285.