GOST 9941-81 PDF

Full title and description

GOST 9941-81 — Seamless cold- and warm-deformed corrosion‑resistant (stainless) steel tubes. Technical specifications for the manufacture, dimensions, mechanical and chemical requirements, testing, marking and acceptance of seamless stainless steel tubes produced by cold or warm deformation methods.

Abstract

This standard (originally issued in 1981) defines technical requirements for seamless corrosion‑resistant steel tubes made by cold and warm deformation. It covers applicable steel grades, dimensional ranges and tolerances, surface quality, mechanical and corrosion properties, test methods, inspection and marking, packing and documentation required for supply and acceptance. The 1981 edition was maintained with several amendments and remained in force until it was replaced by a modernized standard in 2022/2023.

General information

• Status: Superseded / replaced (replaced by GOST 9941-2022; GOST 9941-81 withdrawn from effect 01 August 2023).
• Publication date: Original: 1981 (entered into force 01 January 1983); consolidated editions and amendments published subsequently (notable amendments issued 1983, 1987, 1988, 2001, 2011; consolidated reprints available 2010).
• Publisher: State standards system (originally Gosstandart of the USSR); later managed as a CIS/Interstate standard and by national standards bodies (Rosstandart / EASC) until replacement by GOST 9941-2022.
• ICS / categories: ICS 23.040.10 (Iron and steel pipes / tubes).
• Edition / version: Designation: GOST 9941-81 (with multiple amendments). Replaced by GOST 9941-2022 (effective 01 August 2023).
• Number of pages: Varies by reprint/compilation; consolidated electronic reproductions typically in the mid‑20s pages (approx. 20–30 pages for commonly distributed PDF editions).

Scope

Applies to seamless corrosion‑resistant (stainless) steel tubes manufactured by cold or warm deformation for general-purpose use. The standard sets limits and specifications for applicable steel grades, dimensional ranges (diameters and wall thicknesses), tolerances, permissible surface condition, mechanical properties, chemical composition requirements, heat treatment (where applicable), test methods (including non‑destructive and hydrostatic tests), inspection, marking, packing and associated documentation for commercial supply and acceptance.

Key topics and requirements

• Designation and permitted steel grades (examples: 08Х18Н10, 12Х18Н10Т, 10Х17Н13М2Т and similar corrosion‑resistant alloys used historically under GOST systems).
• Dimensional ranges and tolerances for outside diameter, wall thickness and lengths; tolerances depend on nominal size and manufacturing method (cold/warm deformation).
• Surface quality and acceptable defects; requirements for finishing and surface condition for various end‑uses (heat exchangers, chemical equipment, food industry).
• Chemical composition limits and mechanical property requirements (yield/tensile strength, elongation) appropriate to specified steel grades and heat‑treatment conditions.
• Testing and inspection procedures: dimensional checks, hardness and mechanical testing, hydrostatic testing, non‑destructive testing where required, sampling plans for acceptance.
• Marking, packing, and documentation: supplier marking, delivery documentation and certificates of compliance/quality.
• Requirements for handling, storage and traceability for supplied tube lots.

Typical use and users

Used by manufacturers and suppliers of stainless steel tubes, purchasing and procurement teams, quality/control engineers, mechanical and process engineers specifying tubing for heat exchangers, chemical and petrochemical equipment, food and pharmaceutical plant piping, instrumentation and general machinery where corrosion resistance and precise dimensions are required. Also referenced by testing laboratories and conformity assessment bodies for acceptance testing and verification.

Related standards

Related and commonly referenced standards include other GOSTs for stainless tubes and tube testing and for steel grades, for example: GOST 9940-81 (hot‑deformed corrosion‑resistant tubes), GOST 10498-82 (extra thin‑walled stainless tubes), GOST 24030-80, GOST 10704-91 / GOST 10705-80 (welded and other tube types), and norms governing stainless steel grades and test methods (e.g., GOST 5632 series and test‑method standards). The modern replacement is GOST 9941-2022, which consolidates and updates requirements for cold‑deformed stainless tubes.

Keywords

GOST 9941-81, seamless tubes, stainless steel tubes, corrosion‑resistant tubes, cold‑deformed, warm‑deformed, technical conditions, tube dimensions, tube tolerances, mechanical properties, testing, marking

FAQ

Q: What is this standard?

A: GOST 9941-81 is a Soviet/Russian standard that specified technical conditions for seamless cold‑ and warm‑deformed corrosion‑resistant (stainless) steel tubes — covering materials, dimensions, tests, marking and acceptance rules.

Q: What does it cover?

A: It covers the allowed steel grades, dimensional ranges and tolerances, surface quality, chemical and mechanical property limits, testing and inspection methods (including hydrostatic and non‑destructive tests where required), plus marking, packing and documentation for supply and acceptance of such tubes.

Q: Who typically uses it?

A: Tube manufacturers, metal suppliers and distributors, procurement engineers specifying stainless tubing for chemical, food, heat‑exchange and general engineering applications, quality control and testing laboratories, and regulatory/conformity assessment bodies.

Q: Is it current or superseded?

A: GOST 9941-81 has been superseded. Its provisions were replaced by a modern standard, GOST 9941-2022; GOST 9941-81 was withdrawn from effect on 01 August 2023. For new procurements and specifications, users should reference GOST 9941-2022 or applicable national/industry standards.

Q: Is it part of a series?

A: Yes — it belongs to the family of GOSTs covering stainless and corrosion‑resistant tubes and tube product standards (for example, GOST 9940-81 for hot‑deformed stainless tubes and GOST 10498-82 for especially thin‑walled stainless tubes), and it references other material and test standards used for stainless steels and tube testing.

Q: What are the key keywords?

A: Seamless, stainless steel, corrosion‑resistant, cold‑deformed, warm‑deformed, tubes, GOST 9941-81, dimensions, tolerances, testing, marking.