ISO 5252-1991 PDF

Full title and description

ISO 5252:1991 — Steel tubes — Tolerance systems. This international standard (Edition 2, February 1991) defines a system of dimensional tolerances intended for use by ISO technical committees when preparing standards for steel tubes; it provides the majority of tolerances on dimensions used by ISO/TC 5/SC 1 and is intended as a basic document to harmonize tolerances across tube standards. This edition cancels and replaces ISO 5252:1977.

Abstract

Specifies the majority of tolerances on dimensions used by ISO/TC 5/SC 1 in drawing up International Standards concerning steel tubes. The standard is intended as a basic document for the standardization of tolerances for steel tubes but is not itself a product specification. The second edition (1991) revised the standardized tolerances on thickness compared with the 1977 edition.

General information

• Status: Published (confirmed in systematic review; remains current).
• Publication date: February 1991 (1991-02).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.040.10 — Iron and steel pipes.
• Edition / version: Edition 2 (1991); cancels ISO 5252:1977.
• Number of pages: 4 pages.

(Technical committee: ISO/TC 5/SC 1.)

Scope

Defines a tolerance system to be used when standardizing dimensions of steel tubes. It covers the general approach to specifying dimensional tolerances used by ISO technical committees for tube standards (for example, nominal diameters, wall thicknesses and related dimensional limits and deviations). The document is intended to be referenced by product standards to ensure consistent tolerancing but does not itself define end-product acceptance criteria.

Key topics and requirements

• Establishment of a harmonized tolerance system for steel tubes (used by ISO/TC 5/SC 1).
• Standardized tolerances for major tube dimensions: outside diameter, wall thickness and related dimensional parameters (as applied in ISO tube standards).
• Revision of thickness tolerances compared with the withdrawn 1977 edition.
• Guidance for technical committees to apply tolerance grades and deviations when drafting product standards for steel tubes.
• Meant as a normative reference framework for subsequent tube dimension and mass tables in other ISO standards.

Typical use and users

Used by standards committees, standards writers and technical working groups (particularly ISO/TC 5/SC 1), by manufacturers and designers of steel tubes, by quality and inspection laboratories, and by procurement/specification teams who need harmonized dimensional tolerances across tube product standards.

Related standards

Often used together with other ISO tube standards such as ISO 1127 (stainless steel tubes — dimensions and tolerances) and ISO 4200 (plain end steel tubes — general tables of dimensions and masses), and national adoptions/equivalents (for example TCVN 5894-1995 which corresponds to ISO 5252:1991). ISO 5252:1977 is the withdrawn predecessor.

Keywords

steel tubes, tolerance systems, dimensional tolerances, wall thickness, nominal diameter, ISO/TC 5/SC 1, tube standards, standardization

FAQ

Q: What is this standard?

A: ISO 5252:1991 is an International Standard that defines a system of dimensional tolerances for steel tubes to be used by ISO technical committees when preparing tube product standards.

Q: What does it cover?

A: It covers the majority of dimensional tolerances applied in ISO steel-tube standards (for example tolerances related to diameters and wall thickness) and provides the tolerance framework for use in drafting tube specifications. It is not itself a product specification.

Q: Who typically uses it?

A: Standards committees and secretariats, tube manufacturers and designers, quality/inspection laboratories, and procurement/specification engineers who need consistent tolerancing across tube standards.

Q: Is it current or superseded?

A: ISO 5252:1991 (Edition 2, February 1991) replaced ISO 5252:1977. The 1991 edition was reviewed and confirmed in subsequent systematic reviews (most recently confirmed in 2018) and remains the current ISO edition.

Q: Is it part of a series?

A: It is part of the body of ISO standards for steel tubes and is commonly referenced alongside dimensional and product standards such as ISO 1127 and ISO 4200; it serves as a harmonized tolerancing reference used across the tube standard family.

Q: What are the key keywords?

A: steel tubes; tolerance systems; dimensional tolerances; wall thickness; nominal diameter; ISO/TC 5/SC 1; standardization.