ISO 3601-1-2012 amd1-2019 PDF

Full title and description

ISO 3601-1:2012/Amd 1:2019 — Fluid power systems — O-rings — Part 1: Inside diameters, cross-sections, tolerances and designation codes — Amendment 1. This document is an official amendment to the ISO 3601-1:2012 international standard and provides updates and clarifications to the dimensional and designation requirements for O-rings used in fluid power (hydraulic and pneumatic) systems.

Abstract

The amendment applies to ISO 3601-1:2012 and updates elements of the original Part 1 specification concerning inside diameters, section (cross-section) diameters, tolerances and the alphanumeric designation codes used to identify O‑ring sizes. The underlying Part 1 standard defines standardized dimensions and tolerances intended for elastomeric O‑rings in general industrial and aerospace fluid‑power applications; Amendment 1 provides corrigenda/adjustments to that technical content.

General information

• Status: Published (Amendment to ISO 3601-1:2012).
• Publication date: 2 September 2019 (ISO 3601-1:2012/Amd 1:2019).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.100.60 (Filters, seals and contamination of fluids); 83.140.50 (Seals).
• Edition / version: Edition 5 (ISO 3601-1:2012) — Amendment 1 published 2019 (designation ISO 3601-1:2012/Amd 1:2019).
• Number of pages: 2 (Amendment document).

Scope

This amendment applies to ISO 3601-1:2012 and addresses refinements to the dimensional specifications, tolerances and the identification (designation) coding system for O‑rings. The full Part 1 standard specifies recommended inside diameters, cross‑section diameters (section sizes), associated tolerances and rules for size designation for O‑rings intended for fluid power systems. Users should read the amendment together with the 2012 edition; the amendment does not replace the main text but modifies/updates specified items.

Key topics and requirements

• Standardized inside diameters (d1) and cross‑section (section) diameters (d2) for O‑rings used in hydraulic and pneumatic systems.
• Specified dimensional tolerances for O‑ring sizes to ensure interchangeability and reliable sealing performance in fluid‑power applications.
• Designation codes and rules for unambiguous size identification (alphanumeric size codes).
• Requirements and/or references for methods of measuring O‑ring dimensions for receiving inspection.
• Identification statement and recommended inside diameters (normative/annex guidance present in the main part; amendment adjusts or clarifies some entries).

Typical use and users

Engineers and designers of hydraulic and pneumatic equipment, O‑ring manufacturers and toolmakers, quality and incoming inspection personnel, procurement specialists who specify sealing components, and regulatory or certification bodies in industries such as industrial hydraulics, mobile machinery, automotive and aerospace. The standard (with the amendment) is used to select, specify and verify O‑ring sizes and to ensure dimensional interchangeability.

Related standards

ISO 3601 is a multi‑part series. Relevant related parts and documents include: ISO 3601-2 (housing dimensions for general applications), ISO 3601-3 (quality acceptance criteria), ISO 3601-4 (anti‑extrusion/back‑up rings), ISO 3601-5 (specification of elastomeric materials), plus corrigenda and other amendments to Part 1. Users often apply Part 1 together with Parts 2–5 when designing and qualifying sealing arrangements.

Keywords

O‑rings; fluid power; hydraulic seals; pneumatic seals; inside diameter; cross‑section; section diameter; tolerances; designation code; ISO 3601; amendment 2019.

FAQ

Q: What is this standard?

A: ISO 3601-1:2012/Amd 1:2019 is Amendment 1 (2019) to ISO 3601‑1:2012, the international standard that specifies standardized inside diameters, cross‑sections, tolerances and size‑designation codes for O‑rings used in fluid‑power systems.

Q: What does it cover?

A: It covers dimensions (inside diameter and cross‑section/section diameter), dimensional tolerances, the alphanumeric designation system for identifying sizes, and measurement/identification guidance for receiving inspection. The amendment updates or clarifies specific items in the 2012 Part 1 text.

Q: Who typically uses it?

A: Design engineers, seal manufacturers, tooling suppliers, quality inspectors, procurement and standards/technical committees in hydraulic, pneumatic, automotive, mobile machinery and aerospace sectors.

Q: Is it current or superseded?

A: The ISO record shows ISO 3601‑1:2012 (Edition 5) with Amendment 1 published in September 2019; the 2012 edition was reviewed/confirmed in 2022 and remains current as the edition to be used together with the 2019 amendment. Users should check with ISO or their national standards body for any newer revisions after 2022.

Q: Is it part of a series?

A: Yes — ISO 3601 is a multi‑part series covering O‑rings: Part 1 (dimensions and designation), Part 2 (housing dimensions), Part 3 (quality acceptance criteria), Part 4 (anti‑extrusion/back‑up rings) and Part 5 (elastomer material specifications), plus corrigenda and amendments.

Q: What are the key keywords?

A: O‑rings, inside diameter, cross‑section, tolerances, designation codes, fluid power, hydraulic seals, pneumatic seals, ISO 3601, amendment 2019.