GOST 8691-73 PDF

Full title and description

GOST 8691-73 — Изделия огнеупорные общего назначения. Форма и размеры (English: General-purpose refractory articles. Form and dimensions). The standard defines shapes, nominal dimensions, grouping and numbering of commonly manufactured shaped refractory products (bricks, blocks, special shapes) used for lining thermal units and industrial furnaces.

Abstract

GOST 8691-73 specifies the form and dimensional series for general-purpose refractory articles (shaped refractory bricks and special elements), associated marking of sizes and group numbers, and references technical requirements and related normative documents used in manufacture and procurement of refractory masonry components. It was developed for the metallurgical and refractory industries to harmonize production and interchangeability of shaped refractory products.

General information

• Status: Replaced / withdrawn (standard marked as заменен / withdrawn; ended service on 01 February 2019 in national catalogues).
• Publication date: Approved 15 June 1973 (designation year 1973; published in the 1970s as GOST 8691-73).
• Publisher: Approved by the State Committee for Standards of the USSR (Gosstandart); originally issued by Издательство стандартов (Standards Publishing).
• ICS / categories: Refractories — ICS 81.080 (Refractories / shaped refractory products).
• Edition / version: Original edition GOST 8691-73 (1973) with subsequent amendments recorded (amendments published in later years).
• Number of pages: Approx. 20 pages (published electronic/print formats shown in standards catalogues).

Scope

The standard applies to general-purpose shaped refractory articles used for laying various heat-producing and metallurgical furnaces and thermal units. It covers the geometrical family of items (brick types, special shapes), their nominal sizes and grouping by item numbers to support manufacture, specification and procurement. It does not replace technical conditions for material composition or high-temperature performance tests, which are covered by other normative documents.

Key topics and requirements

• Definition of product marks and categories for general-purpose refractory articles (shamot, semi-acid, etc.).
• Nominal forms and dimensional series for straight bricks, arch bricks, wedges, chamfers, plates, blocks and other shaped items.
• Grouping and numbering system for manufactured items (tables of item numbers by group).
• Permitted tolerances on dimensions, basic technical requirements referenced to material standards, and cross-references to test and material GOSTs.
• Normative references to related technical specifications for refractory compositions and performance (examples: GOST 390 series for chamotte bricks, other refractory product standards).

Typical use and users

Primary users are refractory-product manufacturers, refractory brick foundries, furnace and kiln builders, metallurgical and foundry works, construction and maintenance departments that perform furnace lining, and procurement/specification teams in industrial organizations. The standard is used when ordering standard-shaped refractory items and when verifying compliance of supplied shapes and dimensions. Commercial listings and procurement notices for refractory bricks continue to reference GOST 8691-73 item dimensions in markets where legacy specifications remain in use.

Related standards

GOST 8691-73 references and is linked in practice with other refractory and material standards (examples from the normative references): GOST 390 (shamot and semi-acid refractory bricks technical conditions), GOST 5040 (lightweight insulating refractories), GOST 4157 (dinas refractories), and other product/technical-condition GOSTs. When specifying performance (refractoriness, strength, density) users should also consult these material-specific standards and more recent or replaced national standards.

Keywords

GOST 8691-73, refractory articles, refractory bricks, chamotte brick, shaped refractory products, dimensions, form, refractory blocks, furnace lining, ГОСТ 8691-73.

FAQ

Q: What is this standard?

A: GOST 8691-73 is a Soviet-era national standard titled "General-purpose refractory articles. Form and dimensions" that defines the shape and nominal sizes for commonly produced refractory shaped articles (bricks and special shapes). It was approved in 1973 and catalogued in national standards databases; later it was marked as replaced/withdrawn in modern catalogs.

Q: What does it cover?

A: It covers the geometric forms, dimensional series, grouping and item-number tables for general-purpose shaped refractory articles. It standardizes nominal dimensions and tolerances for interchangeability but does not itself set detailed chemical composition or high-temperature test methods (those are in material-specific GOSTs).

Q: Who typically uses it?

A: Manufacturers of refractory bricks and shaped items, metallurgical plants and furnace builders, procurement/specification teams in industry, and organizations maintaining or replacing furnace linings. Tenders and commercial suppliers in regions using GOST-derived specifications commonly reference the standard for dimensions.

Q: Is it current or superseded?

A: It is listed in national databases as replaced/withdrawn (date of cessation in catalogs shown as 01 February 2019). Users should verify current applicable national or industry standards for shaped refractories in their jurisdiction and consult successor documents or updated technical conditions.

Q: Is it part of a series?

A: Yes — GOST 8691-73 belongs to the family of refractory product standards and cross-references material-specific standards (for example GOST 390 series for chamotte bricks and other GOSTs for corundum/dinas/lightweight refractories). It also replaced an earlier edition (GOST 8691-58) and had amendments published during its lifecycle.

Q: What are the key keywords?

A: Refractory articles, shaped refractory products, fireclay (shamot) brick, dimensions, form, furnace lining, GOST 8691-73.