GOST 28908-91 PDF

Full title and description

ГОСТ 28908-91 — Краны шаровые и затворы дисковые. Строительные длины. (English title: "Ball valves and disk gate valves. End-to-end (face-to-face) dimensions"). The standard specifies the nominal end-to-end (face-to-face) or constructional lengths for a range of metallic ball valves and disk (wafer / flanged) gate/shut-off and regulating disk valves used in pipeline systems.

Abstract

GOST 28908-91 establishes standard constructional (face-to-face / end-to-end) dimensions for ball valves (threaded, union, flanged and weld-end types) and for disk (wafer, flanged and clamped) shut-off and regulating valves. It provides tabulated dimension data for different valve connection types and sizes to be used in new design and manufacturing to ensure interchangeability and compatibility in piping systems. The document was prepared by the Ministry of Heavy Machine Building (Минтяжмаш СССР) and corresponds to ISO 5752‑79 in scope and intent.

General information

• Status: Listed as an active / in-force GOST (introduced 01 January 1992; later reissued/republished in collections — see edition notes).
• Publication date: Approved 30 January 1991; date of introduction (into force): 01 January 1992.
• Publisher: Approved by the State Committee for Standards of the USSR (Gosstandart); developed by the Ministry of Heavy Machine Building (Минтяжмаш СССР).
• ICS / categories: ICS 23.060.20 (pipeline valves; hydraulic and pneumatic systems components).
• Edition / version: Original adoption 1991 (effective 1992); documented reissue/collection republication recorded in 2005.
• Number of pages: 6 (concise standard with tables of constructional lengths).

Scope

The standard applies to metallic ball valves (including threaded, union, flanged and welded-end designs) and to disk (wafer and flanged) shut-off and regulating valves; it sets the constructional face-to-face (end-to-end) lengths to be used when designing and specifying valve installations. Exclusions commonly noted in related bibliographic records include sanitary fittings, non-metallic valves and valves with internal linings (where separate standards apply). The standard provides tables covering multiple connection types and size ranges to harmonize dimensions across manufacturers and installations.

Key topics and requirements

• Standardized face-to-face (end-to-end) constructional lengths for ball valves and disk valves across connection types (threaded, union, flanged, welded, clamped/wafer).
• Tabulated dimension tables (multiple tables covering different valve types and connection methods — e.g., Tables 1–7) to be used in new design and procurement.
• Applicability notes specifying which valve types are excluded (sanitary valves, non-metallic or lined valves).
• Conformance intent with international reference (alignment with ISO 5752 series for metallic valves' face-to-face dimensions).
• Guidance for manufacturers and designers to ensure interchangeability and consistent installation envelopes for pipeline equipment.

Typical use and users

Used by valve manufacturers, piping and mechanical design engineers, procurement specialists, plant layout and piping stress engineers, and quality/standards departments to specify and verify valve dimensions for process, power, oil & gas, water, and general industrial piping systems. It is referenced during the selection and purchase of valves to ensure compatibility with piping flanges, mating equipment and space allocations.

Related standards

GOST 28908-91 is associated with international and regional standards for valve dimensions and piping equipment; it is noted to correspond in scope to ISO 5752 (metallic valves for flanged pipe systems — face-to-face dimensions). Other GOSTs covering valve types, testing, materials or specific industries may be used alongside it (examples of related GOSTs appear in valve and piping collections and national catalogs).

Keywords

GOST 28908-91; ball valve; disk valve; gate/disk valve; face-to-face dimensions; end-to-end length; constructional length; valve standards; pipeline valves; flanged valve dimensions; threaded valve lengths.

FAQ

Q: What is this standard?

A: ГОСТ 28908-91 is a Soviet / interstate standard that defines constructional (face-to-face / end-to-end) lengths for metallic ball valves and disk (wafer / flanged) valves to standardize dimensions across manufacturers and installations.

Q: What does it cover?

A: It covers the standardized end-to-end/face-to-face dimensions for a range of ball valves (threaded, union, flanged, welded) and disk shut-off/regulating valves (flanged, wafer, clamped), presenting tabulated constructional lengths for new design and manufacturing. It excludes certain valve categories such as sanitary fittings and non-metallic or lined valves.

Q: Who typically uses it?

A: Valve manufacturers, piping and mechanical designers, procurement and specification writers, plant engineers, and standards/quality personnel use the standard to ensure dimensional interchangeability and correct installation clearances.

Q: Is it current or superseded?

A: Bibliographic and standards catalog records list ГОСТ 28908-91 as introduced on 01 January 1992 and note later republication/collection reissues (a recorded republication date appears in catalogs as 01 July 2005). Multiple public standards libraries still list the standard as active; users should verify the current legal/regulatory status in their jurisdiction or the relevant national standards body before relying on it for regulatory compliance.

Q: Is it part of a series?

A: It forms part of the family of valve and pipeline hardware standards (ICS 23.060.20) and is aligned with related international standards (notably ISO 5752 series for metallic valves' face-to-face dimensions); it is typically packaged together with other hydraulic/pneumatic and valve GOST collections.

Q: What are the key keywords?

A: Ball valve, disk valve, face-to-face dimensions, end-to-end length, constructional length, flanged valve, wafer valve, threaded valve, GOST 28908-91.