GOST 30852.5-2002 PDF

Full title and description

GOST 30852.5-2002 — "Электрооборудование взрывозащищенное. Часть 4. Метод определения температуры самовоспламенения" / "Explosion‑protected electrical apparatus. Part 4. Method of test for ignition (auto‑ignition) temperature". The standard is a modification of IEC 60079‑4:1975 and specifies the laboratory method and equipment for determining the auto‑ignition temperature of chemically pure gases and vapours in air at atmospheric pressure.

Abstract

This standard defines the test apparatus, test procedure, measurement and recording requirements, acceptance criteria and safety measures for determining the lowest temperature at which a pure gas or vapour in air will self‑ignite (auto‑ignition) under the standard test conditions. It also includes informative tables and classification guidance linking measured auto‑ignition temperatures to gas/vapour grouping for use with explosion‑protected electrical equipment.

General information

• Status: Superseded / replaced (standard marked as "заменён"); replaced by GOST 31610.20‑1‑2020 (part of the updated "Explosive atmospheres" series).
• Publication date: Adopted by the Interstate Council in 2002 (protocol 6 Nov 2002); introduced as a national edition in the Russian Federation on 15 February 2014. (See notes on replacement effective dates below.)
• Publisher: Interstate Council for Standardization, Metrology and Certification (EASC) — official national edition issued via the Federal Agency on Technical Regulation and Metrology (Rosstandart) in Russia.
• ICS / categories: Electrical engineering — Electrical apparatus for explosive atmospheres (ICS 29.260.20).
• Edition / version: Original interstate standard (2002); official Russian edition (published/introduced 15 February 2014). Document is a MOD (modified) adoption of IEC 60079‑4:1975.
• Number of pages: 23 pages (official PDF edition).

Scope

The standard applies to laboratory determination of the auto‑ignition temperature of chemically pure gases and vapours in air at normal atmospheric pressure. It covers required test apparatus (200 cm3 borosilicate test flask and auxiliary equipment), sample introduction, temperature control, observation and acceptance criteria, data recording and safety precautions; annexes include example furnaces, tabulated auto‑ignition temperatures for selected substances, and a classification table for grouping gases/vapours by auto‑ignition temperature for equipment selection.

Key topics and requirements

• Definition of auto‑ignition temperature and induction period (method acceptance criteria and timing limits).
• Detailed description of the test apparatus (200 cm3 test flask, heating furnace, measurement and control instruments).
• Stepwise test procedure: sample volumes, flask temperatures, observation method, repeatability and selection of lowest ignition temperature.
• Requirements for measurement accuracy, data recording, and objective assessment of results.
• Safety requirements for laboratory testing of flammable gases and vapours.
• Annexed reference data: example auto‑ignition temperatures for selected gases/vapours and a classification table mapping ignition temperature to gas/vapour groups (for equipment group selection).

Typical use and users

Used by test laboratories, product certification bodies, manufacturers of electrical equipment for hazardous (explosive) atmospheres, design and safety engineers, and regulators for determination of auto‑ignition data and for assigning gases/vapours to temperature‑based groups when selecting explosion‑protected electrical apparatus. It is commonly referenced together with other parts of the GOST/IEC 60079 family during equipment design, testing and certification.

Related standards

Directly related to IEC 60079‑4:1975 (the international method on which this GOST part is based). It forms part of the GOST 30852 / GOST 31610 series covering explosion‑protected electrical apparatus and explosive atmospheres. The standard was later consolidated/replaced by GOST 31610.20‑1‑2020 (part of the updated "Explosive atmospheres. Part 20‑1" series). Users should refer to the current national implementation of ISO/IEC 80079/60079 series for up‑to‑date test methods and classification data.

Keywords

explosion‑protected electrical apparatus; auto‑ignition temperature; ignition temperature test; gases and vapours; hazardous (explosive) atmospheres; IEC 60079‑4; GOST 30852 series; classification by ignition temperature.

FAQ

Q: What is this standard?

A: GOST 30852.5‑2002 is a part of the explosion‑protected electrical apparatus standards that specifies a laboratory method for determining the auto‑ignition (ignition) temperature of chemically pure gases and vapours in air. It is a modified adoption of IEC 60079‑4:1975.

Q: What does it cover?

A: It covers the test apparatus, stepwise testing procedure, measurement and recording requirements, criteria for acceptance and objectivity of results, safety requirements for testing, and informative annexes with example furnaces, data tables of auto‑ignition temperatures and a classification table mapping ignition temperatures to gas/vapour groups.

Q: Who typically uses it?

A: Testing laboratories, certification bodies, equipment manufacturers, design and safety engineers, and regulators who need laboratory auto‑ignition data or who classify gases/vapours for selection and certification of explosion‑protected electrical equipment.

Q: Is it current or superseded?

A: Superseded. GOST 30852.5‑2002 has been marked as replaced (заменён) and its material has been consolidated into the newer GOST 31610.20‑1‑2020 ("Explosive atmospheres. Part 20‑1. Material characteristics for gas and vapour classification. Test methods and data"), which came into force as the updated part of the national series (effective dates vary by jurisdiction; GOST 31610.20‑1‑2020 was introduced into national use from 01.10.2021 in the Russian implementation). Users should refer to GOST 31610.20‑1‑2020 / the current ISO/IEC 80079/60079 family for up‑to‑date requirements.

Q: Is it part of a series?

A: Yes — it is part of the GOST 30852 family (explosion‑protected electrical apparatus) and the wider IEC/ISO 60079/80079 series of standards on equipment and test methods for explosive atmospheres; its content was later absorbed into the GOST 31610 series during standards consolidation.

Q: What are the key keywords?

A: Auto‑ignition temperature, ignition test, explosion‑protected apparatus, gases and vapours, hazardous atmospheres, IEC 60079‑4, GOST 30852, test method.