GOST 28759.1-90 PDF

Full title and description

GOST 28759.1-90 — "Flanges of vessels and apparatus. Types and parameters". The standard specifies types and basic dimensional parameters of flanges used on pressure vessels and process apparatus, defining selection criteria based on vessel/appareil internal diameter and nominal pressure.

Abstract

This regional (GOST) standard defines the classification, nominal geometric parameters and key dimensional tables for flanges applied to industrial vessels and apparatus. It was prepared to replace the earlier OСТ 26-425-79 and to provide unified flange types and parameter ranges for designers, manufacturers and inspectors of pressure equipment. The document has later been superseded by a newer edition of the same GOST series.

General information

• Status: Replaced / superseded (not current).
• Publication date: Introduced 01 January 1992 (approved 1990, effective 1992-01-01).
• Publisher: Adopted by the State Committee for Product Quality Management and Standards of the USSR (Gosstandart) / Interstate standard.
• ICS / categories: 71.120.20 (Flanges; pressure-vessel fittings and related equipment).
• Edition / version: Original designation GOST 28759.1-90 (1990); later reprints/compilations issued (document later replaced by a 2022 edition of the same part).
• Number of pages: 4 (typical published form / short technical leaflet).

Scope

The standard establishes flange types and their principal dimensions and parameters for use on vessels and apparatus, giving dimensional tables and classification rules depending on the internal diameter of the vessel/apparatus and on the nominal (design) pressure. It is intended to harmonize flange selection and interchangeability for industrial pressure equipment.

Key topics and requirements

• Classification of flange types for vessels and apparatus (by shape and connection method).
• Dimensional parameters and principal geometric sizes correlated to vessel internal diameter and nominal pressure.
• Reference dimensional tables for selection and standardization of flange profiles.
• Requirements for interchangeability with preceding standard OСТ 26-425-79 (transition provisions noted).
• Normative references to related GOST documents used for complementary requirements.

Typical use and users

Engineers and designers of pressure vessels and process apparatus, fabricators and suppliers of flanged components, quality inspectors and certification bodies, and maintenance teams responsible for replacement parts all use this standard to select appropriate flange types and ensure dimensional compatibility in industrial installations (chemical, petrochemical, power generation, and general pressure-vessel fabrication).

Related standards

Predecessor: OСТ 26-425-79 (replaced). Related items include other parts of the GOST 28759 series and referenced standards for flange sealing faces and bolting; normative links in the text include GOST 9493-80 and other GOST documents governing related dimensions and test methods. The part itself has been superseded by a later edition in the GOST 28759.1 series (2022).

Keywords

Flanges; pressure vessels; apparatus flanges; flange types; flange parameters; dimensional tables; GOST 28759.1-90; vessel connections; nominal pressure; vessel diameter.

FAQ

Q: What is this standard?

A: GOST 28759.1-90 is a Soviet/Interstate standard titled "Flanges of vessels and apparatus. Types and parameters" that defines standard flange types and their principal dimensional parameters for pressure vessels and industrial apparatus.

Q: What does it cover?

A: It covers classification of flange types, main geometric dimensions, and tabulated parameters tied to vessel internal diameter and nominal pressure, to ensure coordinated selection and interchangeability of flanged connections on vessels and apparatus.

Q: Who typically uses it?

A: Mechanical and pressure‑equipment designers, flange and vessel manufacturers, procurement specialists, inspectors and maintenance personnel in industries such as chemical, petrochemical, oil & gas, and power engineering.

Q: Is it current or superseded?

A: It has been superseded / replaced by a later edition in the same series (GOST 28759.1-2022). The 1990/1992 edition should be considered historical and replaced for current design where the newer GOST edition applies.

Q: Is it part of a series?

A: Yes — it is the part 1 designation of a GOST series addressing flanges for vessels and apparatus (other parts in the 28759 series cover additional flange types and related items). The standard replaced an earlier OST document during its introduction.

Q: What are the key keywords?

A: Flanges, vessels, apparatus, flange types, dimensional parameters, nominal pressure, vessel diameter, GOST 28759.1-90.