GOST 21743-2021 PDF

Full title and description

GOST 21743-2021 — "Aviation oils. Specifications". Interstate (GOST) standard establishing technical requirements, test methods references, acceptance rules, marking, packaging, storage and safety provisions for aviation lubricating oils produced by selective refining without additives (commonly designated in practice by brands such as MS-14, MS-20 and similar).

Abstract

This standard specifies the composition and physico‑chemical requirements for aviation oils of selective refining without additives, prescribes sampling and testing methods (referencing existing GOST/ISO test methods), defines acceptance and batch control procedures, and sets rules for marking, packaging, transportation and storage. GOST 21743-2021 replaces the older GOST 21743-76 and brings updated limits and referenced methods to reflect modern production and test practices.

General information

• Status: Active / in force.
• Publication date: Adopted 26 August 2021; published (official edition) March 2022; effective / introduced for use 1 July 2022.
• Publisher: Interstate Council for Standardization, Metrology and Certification (GOST/EASC); implemented nationally by Rosstandart (Federal Agency on Technical Regulation and Metrology) in the Russian Federation.
• ICS / categories: 75.100 — Lubricants, industrial oils and related products (Petroleum and related technologies).
• Edition / version: First edition — GOST 21743-2021 (replaces GOST 21743-76).
• Number of pages: Approximately 12 pages (official PDF / printed edition reported as 12 pages).

Scope

Applies to aviation lubricating oils produced by selective refining without added performance additives. The standard covers oils intended for use in aircraft powerplants, gearboxes and related aviation systems where oils of the specified grades (for example, MS-14, MS-20 or comparable designations) are used. It defines mandatory quality characteristics and permissible limits, testing references and rules for acceptance, packing, marking, storage and transportation.

Key topics and requirements

• Designation and classification of aviation oil grades (examples: MS‑14, MS‑20 and grades/sorts where applicable).
• Mandatory physico‑chemical parameters and maximum/minimum limits: kinematic viscosity at 100 °C, viscosity index, carbon residue (Conradson), acid number, ash content (sulfated ash), presence/absence of selective solvents or specific contaminants, water and mechanical impurities limits.
• Referenced test methods (national and international GOST/ISO methods for viscosity, flash point, density, carbon residue, ash, acidity, water content, etc.).
• Sampling, batch acceptance rules and required certification / quality passport accompanying each batch.
• Marking, packaging, transportation and storage requirements specific to aviation oils (including safety and environmental notes as referenced to applicable GOSTs).
• Conformity assessment and rules for production according to approved technology or technological regulation, with provisions for amendments and corrigenda introduced after 2021.

Typical use and users

Used by producers of aviation lubricants, aircraft maintenance and repair organizations (MRO), airlines, airframe and engine manufacturers (for material specification references), testing and certification laboratories, procurement specialists, and regulatory bodies responsible for civil and military aviation fuel/lubricant oversight. Also used by quality managers and supply chain teams specifying acceptance criteria for delivered aviation oils.

Related standards

Replaces: GOST 21743-76. Commonly referenced and related documents include GOST 33 (viscosity methods), GOST 19932 (Conradson carbon residue), GOST 5985 (acid number), GOST 1461 (ash), GOST 1510 (marking, packing, transportation and storage of petroleum products), GOST 1057 (selective solvent tests), and various other GOST/ISO methods cited within the standard for sampling and laboratory testing.

Keywords

aviation oils, lubricants, MS-14, MS-20, specifications, GOST 21743-2021, selective refining, kinematic viscosity, viscosity index, carbon residue, acid number, sulfated ash, sampling, acceptance, packaging

FAQ

Q: What is this standard?

A: GOST 21743-2021 is an interstate (GOST) standard that sets technical specifications for aviation lubricating oils produced by selective refining without additives, covering required quality parameters, test methods and acceptance rules.

Q: What does it cover?

A: It covers physico‑chemical properties and permissible limits (viscosity, viscosity index, carbon residue, acidity, ash, contaminants, etc.), sampling and test methods (via referenced GOST/ISO tests), batch acceptance, marking, packaging, storage and transportation provisions for the oils.

Q: Who typically uses it?

A: Oil manufacturers, aircraft operators and MRO organizations, engine and airframe OEMs (for materials specifications), testing laboratories, procurement and quality assurance teams, and national/regional aviation regulators.

Q: Is it current or superseded?

A: It is current / in force. GOST 21743-2021 supersedes GOST 21743-76. The standard was adopted in 2021, published in early 2022 and became effective on 1 July 2022; subsequent amendments and corrections may have been published as official corrigenda.

Q: Is it part of a series?

A: It is part of the set of petroleum and lubricant standards within the GOST/EASC system and is related to many test-method standards for petroleum products and lubricants; it is not numbered as a multi-part series itself but references numerous complementary GOST/ISO test and safety standards.

Q: What are the key keywords?

A: Aviation oils, lubricants, specifications, MS-14, MS-20, selective refining, viscosity, carbon residue, acid number, sulfated ash, GOST 21743-2021.