GOST 12815-80 PDF

Full title and description

GOST 12815-80 — "Flanges for valves and fittings, connecting parts and pipelines for PN from 0,1 to 20 MPa (from 1 to 200 kgf/cm²). Types. Connecting dimensions and dimensions of sealing surfaces." This standard specifies types of flanges used on valves, fittings and pipeline connecting parts and gives the required connecting dimensions and dimensions of sealing (face) surfaces.

Abstract

GOST 12815-80 defines dimensional and sealing-surface requirements for a range of flange types used to connect valves, fittings and pipeline components rated for nominal pressures (PN) from 0.1 to 20 MPa. It covers flange types, bolt patterns, sealing-surface executions and the key dimensional parameters required for interchangeability and reliable gasket sealing in piping systems. The standard has since been consolidated into later national standards.

General information

• Status: Withdrawn / superseded (consolidated into a later GOST for flanges).
• Publication date: Original designation year 1980 (indicated by "-80"); catalog listings show publication entries in early 1980s (database record: 1983).
• Publisher: Gosstandart / national standards body of the USSR / Russian Federation (national GOST system).
• ICS / categories: 23.040 (Pipelines and their components) — specifically flanges, couplings and connections class (23.040.60).
• Edition / version: GOST 12815-80 (original 1980 designation); later amendments were issued (various amendment entries appear in document catalogues prior to consolidation).
• Number of pages: Published PDF copies in document repositories vary (commonly shown as ~21 pages in some catalogues, other listings show up to ~32 pages depending on edition/appendices).

Scope

Specifies types of flanges for use on valves, fittings, connecting parts and pipeline elements for nominal pressures from 0.1 MPa to 20 MPa, and sets the required connecting dimensions and dimensions of sealing (face) surfaces to ensure mechanical and sealing interchangeability across manufacturers and installations. It applies to steel (and commonly used metallic) flanges used in general industrial piping systems.

Key topics and requirements

• Classification of flange types used on valves, fittings and pipeline parts (various face/sealing executions).
• Connecting dimensions: outside diameter, bolt circle, number and size of bolt holes, hub and hub socket dimensions where applicable.
• Sealing-surface dimensions and execution types (profiles and face geometries required for proper gasket seating).
• Nominal pressure (PN) range coverage: 0.1–20 MPa and corresponding dimensional series for DN ranges.
• Basic interchangeability rules so flanges from different manufacturers mate correctly when following the standard.
• Reference to related technical requirements and surface-finish/assembly considerations as applicable (material and finish standards are referenced normatively rather than specified in full).

Typical use and users

Used by mechanical and piping engineers, valve and flange manufacturers, fabricators, procurement specialists and maintenance teams working on industrial piping systems (oil & gas, petrochemical, water, power, utilities and process industries) where GOST-type flanges are specified. Also used by standards librarians and technical writers preparing technical drawings or procurement specifications that reference legacy GOST flange dimensions.

Related standards

GOST 12815-80 was one of a family of flange and connecting-part standards (for example GOST 12816-80, 12817-80, 12820-80, 12821-80, 12822-80, etc.). These older standards have been consolidated and replaced by the unified standard GOST 33259-2015 (Flanges for valves, fittings and pipelines — design, dimensions and general technical requirements). The consolidation brought older GOST flange standards into a single modernized document.

Keywords

GOST 12815-80, flange, flanges for valves, connecting dimensions, sealing surface, PN 0.1–20 MPa, DN, flange types, GOST flanges, pipe fittings, sealing face.

FAQ

Q: What is this standard?

A: GOST 12815-80 is a national (Soviet / Russian) standard that defined types, connecting dimensions and sealing-surface dimensions for flanges used on valves, fittings and pipelines rated from PN 0.1 to PN 20 MPa.

Q: What does it cover?

A: It covers dimensional specifications (bolt circles, hole counts and sizes, outside and hub dimensions) and sealing-face executions so that flanges from different manufacturers are mechanically and hydraulically compatible in specified pressure ranges.

Q: Who typically uses it?

A: Mechanical/piping engineers, valve and flange manufacturers, fabricators, maintenance and commissioning teams, and procurement specialists working with systems specified to Russian GOST flange dimensions.

Q: Is it current or superseded?

A: Superseded — GOST 12815-80 has been withdrawn/consolidated and its requirements incorporated into the newer unified flange standard GOST 33259-2015 (effective consolidation published in the 2010s, with the new standard in force from 2017 listings). For current design and procurement use GOST 33259-2015 or the latest national version.

Q: Is it part of a series?

A: Yes — it belonged to a family of GOST flange and connecting-part standards (for example 12816-80, 12820-80, 12821-80, 12822-80 and related documents) that defined specific flange types and technical requirements before being combined into GOST 33259-2015.

Q: What are the key keywords?

A: Flange, GOST, sealing surface, connecting dimensions, PN (nominal pressure), DN (nominal diameter), flange types, bolt circle, valve flange, pipeline flange.