GOST 20295-85 PDF

Full title and description

GOST 20295-85 — "Welded steel pipes for main gas-and-oil pipelines. Technical specifications." National standard that sets technical requirements for manufacture, testing, acceptance, marking, packaging, transportation and storage of welded steel pipes intended for trunk (main) gas and oil pipeline systems, oil-product pipelines and related field/technological piping.

Abstract

This standard specifies types, dimensional ranges, strength classes, steel grades, mechanical and chemical requirements, non‑destructive and hydraulic testing, marking and delivery conditions for longitudinally and spiral welded steel pipes used in main gas and oil pipelines. It covers manufacturing variants (including thermal treatment of welds), sampling and test methods, acceptance rules and documentation required for supply.

General information

• Status: In force / effective (original GOST adopted 1985; maintained with subsequent amendments).
• Publication date: Approved 25 November 1985; entry into force / publication commonly cited as 1 January 1987.
• Publisher: USSR State Committee for Standards (Gosstandart USSR); currently administered in the Russian system under Rosstandart conventions.
• ICS / categories: 77.140.75 (Steel pipes and tubes for specific use); related pipeline category 23.040.10 (Pipeline components and pipelines for petroleum and natural gas).
• Edition / version: GOST 20295-85 (base designation). Text includes multiple amendments/corrections issued after adoption (examples documented in 2008, 2010, 2011, 2013 and 2015 editions/changes).
• Number of pages: Approximately 37 pages (standard text and typical annexes).

Scope

Applies to welded steel pipes (longitudinal and spiral welded) manufactured for trunk gas and oil pipelines, oil-product lines, technological and field pipelines. The standard defines permitted diameter and wall-thickness families, strength classes (e.g., K34, K38, K42 and several low-alloy classes up to K60), requirements for steels, weld quality, heat treatment options (full or local), test programs (mechanical, impact, nondestructive and hydraulic) and supply documentation.

Key topics and requirements

• Pipe types and production methods: longitudinal (LSAW/ERW) and spiral (SSAW/LASAW) welded pipes, including expanded/processed variants.
• Dimensional range and tolerances: nominal outside diameters and permitted wall thickness ranges with specified manufacturing tolerances and straightness limits.
• Strength classes and steel grades: designation of classes (K34, K38, K42, K48…K60) and corresponding mechanical property limits (tensile strength, yield, elongation) and chemical composition limits for carbon and alloying elements.
• Testing and inspection: mandatory sampling and testing (tensile, impact/charpy where required), 100% non‑destructive testing of weld seam in production line (ultrasonic/radiographic as applicable) and 100% hydraulic pressure testing of pipes.
• Heat treatment and weld treatment options: requirements for full-body and local post‑weld heat treatment and how treatment affects acceptance tests.
• Acceptance and documentation: batch acceptance rules, required quality certificates, mill test reports, marking and traceability (including melt number, pipe number for certain sizes and classes).
• Marking, packing, transport and storage: marking near the pipe end, packing rules for bundles, preservation of threaded ends, and storage/transport protection requirements.

Typical use and users

Used by pipe manufacturers and mill quality engineers to design and certify welded pipes for trunk pipeline projects; pipeline operators and EPC contractors for procurement and technical specification; quality inspectors and testing laboratories conducting mechanical and NDT checks; regulatory and certification bodies assessing compliance for oil & gas pipeline construction.

Related standards

Commonly referenced and complementary standards include: ISO/IEC pipeline and pipe standards (for example ISO 3183 series for line pipe), national GOST standards on steel and testing methods (e.g., GOST 1050 for steels, GOST 10006 for tensile testing, GOST 3845 for hydraulic testing, GOST 10692 for marking/packing/transport), and relevant NDT and metallurgy test method standards cited inside the GOST text.

Keywords

welded steel pipe, main pipeline, gas pipeline, oil pipeline, LSAW, SSAW, ERW, strength class K34 K38 K42, mechanical tests, impact test, non‑destructive testing, hydraulic test, marking, packing, GOST 20295-85

FAQ

Q: What is this standard?

A: GOST 20295-85 is the national standard that specifies technical requirements for welded steel pipes intended for trunk gas and oil pipelines, covering manufacture, testing, acceptance, marking and delivery conditions.

Q: What does it cover?

A: It covers types of welded pipes (longitudinal and spiral), dimensional ranges and tolerances, steel grades and strength classes, required mechanical and chemical properties, mandatory testing (including NDT and hydraulic tests), heat treatment options, acceptance procedures and packaging/marking rules.

Q: Who typically uses it?

A: Pipe producers, pipeline EPC contractors, pipeline operators, QA/QC inspectors, testing laboratories and certification bodies involved in pipeline material specification, procurement and conformity assessment for oil & gas projects.

Q: Is it current or superseded?

A: The standard is published as GOST 20295-85 (approved in 1985, commonly cited with effective date 1 January 1987) and is documented with subsequent amendments. It historically superseded earlier versions (for example GOST 20295-74). Users should check the national standards registry or the latest normative acts for any newer replacements or national adoptions (for example newer GOST R/ISO pipeline delivery standards) before final procurement or design.

Q: Is it part of a series?

A: It sits within the family of pipeline and steel product standards and is used alongside other GOST/ISO standards for steel, testing methods and pipeline components (see related standards such as ISO 3183 and GOST standards for steel grades and test methods).

Q: What are the key keywords?

A: welded steel pipe, trunk pipeline, gas pipeline, oil pipeline, LSAW, SSAW, ERW, strength classes (K34–K60), NDT, hydraulic test, GOST 20295-85.