GOST 31446-2017 PDF

Full title and description

GOST 31446-2017 — Steel casing and tubing for petroleum and natural gas industries. General specifications (Russian: Трубы стальные обсадные и насосно‑компрессорные для нефтяной и газовой промышленности. Общие технические условия). The standard sets technical delivery, material, mechanical, dimensional, marking and testing requirements for casing, tubing, related couplings and blanks used in oil and gas wells.

Abstract

This national standard establishes general technical conditions for steel casing and tubing (including non‑threaded pipes, short pipes, subs), couplings, tube blanks for couplings and accessory blanks. It defines three product specification levels (PSL‑1, PSL‑2 and PSL‑3), strength groups, dimensional and marking rules, mechanical and chemical requirements, testing (including hydrostatic and non‑destructive testing) and provisions for resistance to sulfide (H2S) environments where applicable.

General information

• Status: Active / In force (current national standard used for OCTG in the Russian Federation).
• Publication date: Approved by the Federal Agency for Technical Regulation and Metrology (Rosstandart) on 3 August 2017; published/entered into force in official publication listings in 2018 (commonly referenced publication date 1 July 2018).
• Publisher: Federal Agency on Technical Regulating and Metrology (Rosstandart) / national standards body of the Russian Federation.
• ICS / categories: Petroleum and related technologies — ICS 75 (petroleum and related technologies), commonly classified under equipment and materials for petroleum and natural gas industries (subgroups such as 75.180).
• Edition / version: GOST 31446-2017 (original 2017 edition / designation year 2017).
• Number of pages: Approximately 254–257 pages (published English/Russian editions reported at ~254 and ~257 pages by commercial distributors).

Scope

The standard applies to steel pipes intended for use as casing and tubing in oil and gas wells, including threaded and non‑threaded products, short pipes, subs, couplings and blanks for couplings and accessory parts. It covers requirements for three product specification levels (PSL‑1 is the baseline; PSL‑2 and PSL‑3 add more stringent requirements and are detailed in the standard’s annexes), chemical and mechanical properties, manufacturing and testing methods, marking and documentation. The standard is intended for manufacture, acceptance, delivery and use of OCTG in petroleum and natural‑gas field operations.

Key topics and requirements

• Applicability: casing, tubing, non‑threaded pipes, short pipes, subs, couplings and blanks for couplings; classification by strength groups (J55, K55, L80, N80, R95, C90, P110, etc.).
• Product Specification Levels (PSL‑1 / PSL‑2 / PSL‑3): baseline (PSL‑1) requirements and optional elevated levels (PSL‑2/PSL‑3) for more demanding environments and tests.
• Material and mechanical requirements: chemical composition limits, tensile and yield strength, hardness, Charpy impact where specified, and metallurgical controls.
• Corrosion and environmental resistance: provisions and testing related to sulfide (H2S) environments and resistance to sulfide stress cracking where applicable (requirements and qualification methods referenced in annexes).
• Threaded connections and coupling types: specification of common connection types and threading/marking rules for threaded products; dimensional tolerances and thread inspections.
• Testing and inspection: hydrostatic testing, non‑destructive testing (eddy‑current/UT/RT as applicable), dimensional checks, marking verification and documentation (mill test certificates).
• Marking and identification: color bands, stamps and marking data on pipes and couplings to indicate grade, length group, strength group and PSL.

Typical use and users

Primary users are manufacturers of OCTG (casing and tubing), oilfield equipment suppliers, drilling and completion contractors, inspection and testing laboratories, and purchasing/specification engineers in upstream oil and gas companies. The standard is used to specify purchase requirements, quality control and acceptance criteria for tubulars intended for well construction and production operations.

Related standards

GOST 31446-2017 is used alongside national and international standards for OCTG and well tubulars (commonly referenced standards include API Spec 5CT and ISO 11960 for casing and tubing, and various older GOST/R standards such as GOST R 53366‑2009 and GOST 632‑80 in related contexts). Manufacturers and suppliers often reference equivalence or cross‑references when supplying to international customers.

Keywords

OCTG, casing, tubing, casing pipes, tubing pipes, couplings, PSL‑1, PSL‑2, PSL‑3, strength groups, threaded connections, hydrostatic test, sulfide stress cracking, marking, GOST, Rosstandart.

FAQ

Q: What is this standard?

A: GOST 31446-2017 is the Russian national standard specifying general technical conditions for steel casing and tubing used in the petroleum and natural gas industries — covering materials, mechanical requirements, testing, marking and delivery.

Q: What does it cover?

A: It covers casing and tubing (including non‑threaded pipes, short pipes and subs), couplings and blanks; classification by strength groups and PSL levels; chemical and mechanical requirements; testing (hydrostatic and NDT); threading and marking rules; and provisions for hostile environments including sulfide exposure.

Q: Who typically uses it?

A: OCTG manufacturers, oilfield service and drilling contractors, procurement and quality engineers in upstream oil and gas companies, and test/inspection laboratories. It is used both for domestic Russian supply chains and in export contracts where GOST conformity is required.

Q: Is it current or superseded?

A: As of the available records, GOST 31446-2017 is the active (in‑force) standard for casing and tubing; it was approved in 2017 and published in listings in 2018. Users should verify the national standards registry or Rosstandart for any amendments or newer revisions before specification.

Q: Is it part of a series?

A: The standard forms part of the set of OCTG and petroleum‑industry standards in the Russian system and is commonly used alongside related GOST/GOST‑R documents and international specifications (for example API Spec 5CT and ISO 11960) for complementary or equivalent requirements.

Q: What are the key keywords?

A: Casing, tubing, OCTG, PSL‑1, PSL‑2, PSL‑3, threaded connections, hydrostatic test, sulfide stress cracking, strength groups, couplings, marking.