GOST 28549.9-90 PDF

Full title and description

GOST 28549.9-90 — "Lubricants, industrial oils and related products (Class L). Classification. Family X (Greases)". This GOST is the USSR/Russian adoption of the classification for lubricating greases (family X) and provides the code system and classification rules used to identify grease types and their intended operating conditions.

Abstract

GOST 28549.9-90 defines the classification scheme for greases (Family X) within Class L (lubricants, industrial oils and related products). It follows the international ISO 6743-9 technical approach—assigning grease codes that reflect base type, temperature range, water resistance/corrosion protection, extreme-pressure behavior and consistency (NLGI grades). The standard is a short, classification-only document intended to be used together with general classification guidance in related parts of ISO/GOST classification series.

General information

• Status: Replaced / superseded (withdrawn as an independent USSR GOST; subsequently aligned with GOST ISO 6743-9 series adoption).
• Publication date: Originally introduced with effect 01 July 1991 (designation year shown as 1990).
• Publisher: Approved and introduced under the State Committee for Standards of the USSR (Gosstandart) / Ministry of Chemical and Petroleum Industry (USSR).
• ICS / categories: Lubricants and industrial oils classification — ICS 75.100 (class L / greases, Family X).
• Edition / version: GOST designation: 28549.9-90 (original 1990 designation; effective 1991-07-01).
• Number of pages: 4 pages (short classification sheet).

Scope

The standard’s scope covers the classification and identification system for lubricating greases (Family X) used for machinery and equipment lubrication. It specifies the coding elements and symbols used to indicate minimum/maximum service temperatures, water resistance and corrosion protection categories, extreme-pressure performance, base/thickener type where applicable, and NLGI consistency classes. GOST 28549.9-90 was issued as a direct national application of the corresponding ISO classification to ensure compatibility of grease identification in industrial practice.

Key topics and requirements

• Classification code structure for greases (Family X) — components include temperature rating, water resistance/corrosion protection letter, EP/anti-wear indicators and NLGI consistency grade.
• Definition of grease families and subgroups based on operating conditions rather than end-use only.
• Reference to test methods and related normative documents for penetration (DIN/ISO), water resistance and corrosion protection tests (as cited by the classification).
• Short-form classification (concise 4-page format) intended for cross-reference with broader classification parts (ISO/GOST 28549 / 6743 series).

Typical use and users

Used by lubricant manufacturers, product coders, maintenance and reliability engineers, technical writers (equipment lubrication instructions), procurement/specification authors, and testing laboratories to label and select greases consistently for specific temperature, load and environmental conditions. The classification is primarily a reference tool for specification and communication rather than a performance test method.

Related standards

Part of the wider GOST 28549 series (classification of lubricants) and directly related to ISO 6743-9 (Family X — greases). Later national adoption and updates are published under GOST ISO 6743-9 (the 2013/2021 national adoption editions), which supersede the older GOST 28549.9-90 classification in current Russian practice. Other related parts include the general part (6743-99 / GOST 28549.0) and additional family parts of the ISO/GOST 6743 series.

Keywords

GOST 28549.9-90; greases; lubricants; classification; Family X; Class L; NLGI; temperature rating; water resistance; EP grease; Gosstandart; ISO 6743-9.

FAQ

Q: What is this standard?

A: GOST 28549.9-90 is the USSR-era national classification for lubricating greases (Family X) within the Class L lubricant classification system; it implements the grease classification approach of ISO 6743-9.

Q: What does it cover?

A: It covers the coding and classification rules used to identify grease types by service temperature range, water resistance and corrosion protection, extreme-pressure behavior, and consistency (NLGI grade). The document is concise and intended to be used with related normative references and test methods.

Q: Who typically uses it?

A: Lubricant manufacturers, R&D and quality laboratories, maintenance and reliability engineers, technical authors preparing lubrication instructions, and procurement/spec writers.

Q: Is it current or superseded?

A: Superseded as a standalone USSR GOST classification document. The classification system has since been maintained under the GOST ISO 6743-9 series (national adoption of the ISO 6743-9 family); GOST ISO 6743-9-2013 (published in Russian national editions later and made available in 2021) is the modern national reference.

Q: Is it part of a series?

A: Yes — it is part of the GOST 28549 series (classification of lubricants, class L) and corresponds to the ISO 6743 classification parts (Part 9 — Family X for greases). Other family parts cover different lubricant application groups.

Q: What are the key keywords?

A: Greases; classification; family X; lubricants; Class L; NLGI; temperature rating; water resistance; EP properties; GOST; ISO 6743.