GOST 28779-90 PDF

Full title and description

GOST 28779-90 — "Материалы электроизоляционные твердые. Методы определения воспламеняемости под воздействием источника зажигания" (English: Solid electrical insulating materials — Methods of test for the determination of the flammability when exposed to an igniting source). This interstate standard defines laboratory test procedures to evaluate the flammability behaviour of solid electrical insulating materials when exposed to an ignition source for preliminary fire-hazard assessment.

Abstract

GOST 28779-90 specifies small-scale test methods (needle/jet flame, Bunsen-type flame and related specimen arrangements and acceptance criteria) intended to give a preliminary indication of how solid electrical insulating materials behave under direct exposure to an igniting source. The methods are used to record parameters such as after-flame time, after-glow time, extent of damage and dripping/ignition of supporting materials. The standard is aligned with international practice (it is referenced with IEC 707-81).

General information

• Status: Active / in force (interstate GOST listed as действующий in commercial and standards catalogues; verify with national registry for current legal applicability).
• Publication date: Introduced/entered into force 01 January 1992 (standard designation shows “-90” indicating adoption in 1990; official entry into effect recorded 01.01.1992).
• Publisher: Issued as a GOST (interstate) standard under the USSR State Committee for Standards / Gosstandart (now administered through the regional GOST system and national bodies such as Rosstandart/EASC).
• ICS / categories: ICS 29.035 (Electrical insulating materials / 29.035.01).
• Edition / version: Original interstate GOST 28779-90 (adopted c. 1990; enter-into-force date 1992). Amendments/errata have been recorded in standards catalogues (see national indices for any updates).
• Number of pages: 13 (commonly listed as 13 pages in standards catalogues; some library entries show 13–14 pages depending on front matter).

Scope

GOST 28779-90 covers test procedures for preliminary laboratory evaluation of the flammability of solid electrical insulating materials when directly exposed to a controlled ignition source. It is intended for comparative classification and for use by materials manufacturers, test laboratories and product designers to assess fire-behaviour in early development or for compliance with product standards that reference these methods. It does not replace full-scale reaction-to-fire tests or national fire-code requirements.

Key topics and requirements

• Defined specimen dimensions, conditioning and mounting procedures for vertical and/or horizontal exposures.
• Specified ignition source(s) and test sequences (needle/jet flame or small Bunsen-type flame) to simulate a local ignition event.
• Measurements and acceptance criteria including after-flame time, after-glow time, burn length/damage extent and dripping/ignition of supporting materials.
• Reporting requirements and interpretation guidance for preliminary classification of material flammability.
• Reference to related test standards and amendments (standard text cites international counterparts such as IEC procedures).

Typical use and users

Primary users are: material manufacturers (plastics, rubbers, composites used as electrical insulators), independent testing laboratories performing type or R&D tests, product engineers evaluating component-level fire performance, conformity assessment bodies and regulators who reference GOST/IEC methods. The standard is used for preliminary screening and material selection rather than definitive building-code acceptance.

Related standards

Standards commonly referenced with or alongside GOST 28779-90 include other GOST/GOST‑R methods for small-scale flame tests (for example ГОСТ 27484-87 — needle-flame/Bunsen burner tests), national variants such as GOST R 50695-94 (methods of test for flammability of solid electrical insulating materials, 1995), and relevant IEC flame-test methods (IEC documents cited in the GOST bibliographic record, e.g. IEC 707-81 reference). For full product compliance, consult reaction-to-fire and smoke/toxicity standards applicable in the target market.

Keywords

electrical insulating materials; flammability test; needle flame; Bunsen burner; small-scale flame test; GOST; IEC 707-81; material screening; fire behaviour.

FAQ

Q: What is this standard?

A: GOST 28779-90 is an interstate standard that defines laboratory methods to determine the flammability behaviour of solid electrical insulating materials when exposed to an ignition source; it is used for preliminary material screening.

Q: What does it cover?

A: It covers specimen preparation/conditioning, test apparatus and ignition sources (needle/jet or small Bunsen-type flames), measurement of after-flame/after-glow times, burn length/damage and related reporting needed for comparative assessment of flammability. It is not a full-scale reaction-to-fire procedure.

Q: Who typically uses it?

A: Materials manufacturers, electrical component designers, testing laboratories, conformity-assessment bodies and standards specialists use GOST 28779-90 for R&D, type testing and preliminary fire-safety evaluation.

Q: Is it current or superseded?

A: Commercial standards catalogues and public libraries list GOST 28779-90 as действующий (active) with introduction into force 01.01.1992. There are later related national documents (e.g. GOST R 50695-94) addressing similar methods; users should verify current legal applicability and any national replacements or adoptions in their jurisdiction before relying on the standard for certification.

Q: Is it part of a series?

A: Yes — it belongs to the family of standards addressing tests for electrical insulating materials (ICS 29.035) and is bibliographically linked to related GOST and IEC test-method standards for small-scale flame exposure and fire-hazard testing.

Q: What are the key keywords?

A: Key keywords are: electrical insulating materials, flammability, needle flame test, Bunsen burner test, small-scale flame test, GOST, IEC 707-81, material screening.