GOST 21345-2005 PDF

Full title and description

GOST 21345-2005 — "Ball, lifting-plug and cylindrical cocks for nominal pressure at most PN 250. General specifications". This interstate standard establishes general technical requirements, designations, testing, marking and documentation rules for ball, lifting-plug and cylindrical shut-off cocks intended for nominal pressures up to PN 250.

Abstract

GOST 21345-2005 specifies general technical conditions for manufacture, inspection and acceptance of ball, cone (lifting-plug) and cylindrical cocks with nominal pressure ratings not exceeding PN 250. It covers product types, materials, basic dimensions and pressure classes, requirements for sealing, corrosion protection, testing (hydrostatic, pneumatic and tightness), marking, packaging and normative references used for conformity assessment.

General information

• Status: In force / active (replaces GOST 21345-78).
• Publication date: Standard designation year 2005; enacted/introduced into practice 1 April 2008; registration date 21 September 2005.
• Publisher: Issued as an interstate GOST standard (adopted within the CIS/GOST framework; implemented by national standardization bodies including the Russian federation authorities responsible for standards).
• ICS / categories: 23.060 — Fluid systems and components for general use; valves and fittings.
• Edition / version: GOST 21345-2005 (current edition from 2005, implementation date 1 April 2008); contains later amendments and corrections noted in commercial catalogues (amendments referenced in bibliographic records).
• Number of pages: 28 pages (typical published text length in commercial catalogues and standards repositories).

Scope

The standard applies to ball valves, lifting-plug (cone) valves and cylindrical cocks designed for nominal pressures up to PN 250. It covers general technical requirements that manufacturers, suppliers and testing laboratories must follow for design types covered, including dimensional series, pressure-temperature ratings, materials and surface treatments, testing procedures (strength, tightness and acceptance tests), marking, packing and documentation for supply and acceptance. It is intended for industrial pipeline systems across oil & gas, chemical, power, water supply and other sectors where such shut‑off valves are used.

Key topics and requirements

• Definitions and classification of valve types: ball, lifting‑plug (cone) and cylindrical cocks.
• Pressure rating scope: nominal pressure classes up to PN 250 and corresponding test pressures.
• Material and manufacturing requirements for bodies, seats and sealing elements, including corrosion protection.
• Dimensional and constructional requirements (basic sizes, flanged / threaded / welded ends where applicable).
• Testing requirements: hydrostatic strength tests, tightness (leakage) tests, acceptance and routine tests.
• Marking, packaging and documentation required for delivery and conformity assessment.
• Reference normative documents and normative replacement of earlier GOST 21345-78.

Typical use and users

Primary users are valve manufacturers, product designers, quality and testing laboratories, procurement and regulatory bodies, and engineering teams in industries such as oil & gas, petrochemical, chemical processing, power generation, municipal water and industrial piping systems. The standard is used when specifying, testing and accepting shut‑off valves designed for moderate to high nominal pressures (up to PN 250).

Related standards

GOST 21345-2005 replaces GOST 21345-78. The text references multiple related GOST and industry normative documents covering testing methods, materials, corrosion protection, drawing and technical documentation rules (examples include various GOSTs on corrosion protection, testing, technical drawings and valve‑related standards). Implementations and product conformity often cross‑reference more recent valve and testing standards in the GOST/GOST‑R series.

Keywords

ball valve, lifting‑plug (cone) valve, cylindrical cock, PN 250, shut‑off valve, valve testing, valve marking, GOST 21345-2005, valve specifications, industrial valves.

FAQ

Q: What is this standard?

A: GOST 21345-2005 is an interstate (GOST) standard that sets general technical specifications for ball, lifting‑plug (cone) and cylindrical shut‑off cocks with nominal pressure up to PN 250.

Q: What does it cover?

A: It covers product classification, materials, constructional and dimensional requirements, pressure/temperature ratings, testing (strength and tightness), marking, packaging and required documentation for acceptance and supply.

Q: Who typically uses it?

A: Manufacturers of shut‑off valves, design and procurement engineers, testing laboratories, quality assurance and regulatory authorities in industries using pipeline valves (oil & gas, chemical, power, water, etc.).

Q: Is it current or superseded?

A: GOST 21345-2005 is the successor to GOST 21345-78 and is listed as the active standard in public registries and standards catalogues; its publication/implementation date is 1 April 2008 with the designation year 2005. Check national registries for any later amendments or national adoptions that may affect applicability.

Q: Is it part of a series?

A: It belongs to the family of GOST standards for valves and pipeline fittings (classification 23.060) and is commonly used together with more specific GOST/GOST‑R documents that define materials, test methods and related valve types. It was issued as an interstate GOST document maintained by the relevant technical committee for industrial pipeline valves.

Q: What are the key keywords?

A: ball valve; lifting‑plug (cone) valve; cylindrical cock; PN 250; shut‑off valve; valve testing; marking; GOST 21345-2005.