GOST 28759.3-90 PDF

Full title and description

GOST 28759.3-90 — Butt welded steel flanges of vessels and apparatus. Design and dimensions. (Russian title: Фланцы сосудов и аппаратов стальные приварные встык. Конструкция и размеры).

Abstract

National (GOST) standard specifying the constructional features and dimensional series for steel butt-welded (neck/collar-type) flanges used on pressure vessels and apparatus. The standard defines nominal diameters, basic external sizes, pressure (nominal) ratings, temperature ranges, material grades and includes mass tables and references to related parts of the GOST 28759 series.

General information

• Status: Withdrawn / replaced (superseded) — replaced by GOST 28759.3-2022.
• Publication date: Adopted 1990 (designation year), entered into force January 1, 1992.
• Publisher: Issued under the USSR State Standard system (Gosstandart); today these GOST documents are maintained/published by the Russian national standards authority (Rosstandart) and related national catalogs.
• ICS / categories: Related classifications include petroleum and related technologies; chemical technology / equipment for the chemical industry (examples: 75.200, 71.120 in later catalog entries).
• Edition / version: Original designation GOST 28759.3-90 (1990); later superseded by GOST 28759.3-2022.
• Number of pages: Approximately 12 pages (typical published PDF).

Scope

Applies to steel butt-welded flanges for vessels and apparatus with internal diameters (Dn) from 400 mm up to 4000 mm (outer/base sizes for shells, dished ends and necks typically in the range ~426–720 mm), nominal pressures generally from 0.6 MPa to 6.3 MPa (with tables for common increments such as 1.0, 1.6, 2.5, 4.0, 6.3 MPa) and designed for working temperatures roughly −70 °C to +540 °C. Intended for use in chemical, petrochemical, petroleum refining and other industrial applications.

Key topics and requirements

• Geometrical design and dimensional series for butt-welded (collar/neck) flanges for vessels and apparatus (nominal diameters, basic external dimensions, flange executions/types).
• Pressure (nominal) ratings and corresponding dimensional/mass tables for each execution and diameter.
• Material grades and recommended steels for different temperature/pressure combinations (examples cited: ст.20, 09Г2С, 12Х18Н10Т and other common structural and corrosion-resistant steels).
• Mass (weight) tables and dimensional data for procurement and design calculations.
• References to related parts of the series (gaskets, fastenings and complementary flange parts) and normative cross-references (other parts of GOST 28759 and earlier OСТ where applicable).

Typical use and users

Engineers and designers of pressure vessels and stationary apparatus, pipework and fabricators/manufacturers of flanges and vessel components in the chemical, petrochemical, petroleum refining and heavy process industries; procurement and quality departments specifying flange dimensions and material; repair/maintenance workshops replacing vessel flanges to match original GOST dimensions. Commercial suppliers and manufacturers in the CIS region commonly reference this standard for product listings and production.

Related standards

Part of the GOST 28759 series (other parts cover flange face forms, gaskets, fastenings and related items). The original GOST 28759.3-90 has normative links to GOST 28759.1‑90, 28759.5‑90, 28759.6‑90 and 28759.7‑90 and later was updated/replaced by GOST 28759.3‑2022. Users should consult the current 28759.3‑2022 text and the companion parts for gasket and joining requirements.

Keywords

GOST 28759.3-90; butt-welded flange; vessel flange; apparatus flange; neck (collar) flange; flange dimensions; flange design; pressure vessels; Dn 400–4000; Ru 0.6–6.3 MPa; −70 °C to +540 °C; GOST 28759 series; replaced by 28759.3-2022.

FAQ

Q: What is this standard?

A: GOST 28759.3-90 is a state (GOST) standard that defined the design and dimensions for steel butt-welded (collar/neck) flanges used on vessels and stationary apparatus. It set dimensional series, execution types, mass tables and cross-references to related normative parts.

Q: What does it cover?

A: It covers geometry, dimensional series, execution types, pressure/temperature ranges and mass data for butt-welded flanges intended for vessels and apparatus (typical DN range 400–4000 mm, nominal pressures commonly 0.6–6.3 MPa, working temperatures approx. −70 °C to +540 °C) and provides normative links to companion parts of the series.

Q: Who typically uses it?

A: Designers and engineers of pressure vessels and process equipment, flange and vessel manufacturers, procurement and quality personnel in chemical, petrochemical and oil & gas industries, and maintenance/repair organizations within the CIS market where GOST dimensions are specified.

Q: Is it current or superseded?

A: GOST 28759.3-90 has been superseded — it was withdrawn/replaced by a newer edition, GOST 28759.3-2022. Users needing an up-to-date normative basis should consult the 2022 version and national adoption notices.

Q: Is it part of a series?

A: Yes — it is one part of the GOST 28759 family (which includes related parts for flange types, gaskets and fastenings). The series establishes coordinated dimensional, sealing and connection requirements for vessel and apparatus flanges.

Q: What are the key keywords?

A: Butt-welded flange, vessel flange, apparatus flange, flange dimensions, GOST 28759, flange execution, DN 400–4000, Ru (PN) 0.6–6.3 MPa, −70 °C to +540 °C, superseded by 28759.3-2022.