ISO 16031-2:2003 PDF

Aerospace fluid systems — O-rings, inch series: Inside diameters and cross-sections, tolerances and size-identification codes — Part 2: Standard tolerances for non-hydraulic systems

Open preview (PDF)

Title (English):

ISO 16031-2:2003

Aerospace fluid systems — O-rings, inch series: Inside diameters and cross-sections, tolerances and size-identification codes — Part 2: Standard tolerances for non-hydraulic systems

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 13
Publication date:: August 28, 2003
Edition:: ISO IS 16031 edition 1 version 1
ICS:: 49.080

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Description (English):

ISO 16031-2:2003 specifies the inside diameters, cross-sections, tolerances and size identification codes for inch O-rings used in aerospace fluid systems intended for use in non-hydraulic systems. ISO 16031-2:2003 is applicable, provided that suitable tooling is available, to O-rings made from all other elastomeric materials other than nitrile and ethylene propylene materials, for which ISO 16031-1 specifies the dimensions. Specifications for O-rings with an inside diameter up to 12,7 mm have been taken from ISO 16031-1, because the same tolerances are applicable to the O-rings in ISO 16031-2:2003.

Technical details

Technical committee: ISO/TC 20/SC 10 - Aerospace fluid systems and components
SKU: ISO 16031-2:2003

Abstract

Overview

ISO 16031-2:2003 - Aerospace fluid systems - O-rings, inch series: Inside diameters and cross-sections, tolerances and size-identification codes - Part 2 - defines standard inside diameters, cross-sections, tolerances and size-identification codes for inch-series O-rings intended for non-hydraulic aerospace fluid systems. The standard applies to O-rings made from elastomeric materials other than nitrile and ethylene propylene (EP), and it adopts the toroidal (O-ring) configuration. Tables in the document list the standardized inside diameters, cross-sections and associated dash size codes (e.g., -001 to -475 and a 900 series for tube-fitting bosses).

Key topics and technical requirements

Scope: Inch-series O-rings for non-hydraulic aerospace fluid systems; applies when suitable tooling is available.
Dimensions and tolerances: Standardized combinations of inside diameter and cross-section are specified in tabular form; tolerances are provided for each size.
Size-identification codes: Dash numbers map to specific inside diameter / cross-section pairs; groups of 100 dash numbers indicate the cross-section family. A separate 900-series addresses O-rings for sealing straight thread tube-fitting bosses.
Configuration: O-rings are defined as toroidal sealing rings (note: ISO uses the term “O-ring”).
Normative references and terminology: Uses ISO 5598 vocabulary; prepared by ISO/TC 20 SC 10 (Aerospace fluid systems and components).

Practical applications and users

ISO 16031-2:2003 is used to ensure interchangeability, quality and reliable sealing performance in aerospace systems that are not hydraulic (for example pneumatic circuits, fuel venting seals, environmental seals and low-pressure fluid lines). Typical users include:

Aerospace design and systems engineers selecting seal sizes for non-hydraulic components.
O-ring manufacturers and mold/tooling designers producing inch-series elastomeric seals.
Procurement teams and suppliers specifying dash-code parts for inventory and replacement.
Quality, inspection and maintenance personnel verifying dimensional conformity during acceptance testing and repair.

Using the standardized inside diameters, cross-sections, and tolerances streamlines sourcing, reduces mismatch risk and simplifies maintenance logistics for aerospace operators and OEMs.

Related standards

ISO 16031-1 - Part 1: Close tolerances for hydraulic systems; covers nitrile and EP materials and small diameters (≤ 12.7 mm) referenced in Part 2.
ISO 5598 - Fluid power systems and components - Vocabulary (terminology used in ISO 16031-2).

Keywords: ISO 16031-2:2003, O-rings, aerospace fluid systems, non-hydraulic systems, inch series, inside diameters, cross-sections, tolerances, size-identification codes.

Related standards

Mentioned in the description and other ISO standards

Abstract

Overview

Key topics and technical requirements

Scope: Inch-series O-rings for non-hydraulic aerospace fluid systems; applies when suitable tooling is available.
Dimensions and tolerances: Standardized combinations of inside diameter and cross-section are specified in tabular form; tolerances are provided for each size.
Size-identification codes: Dash numbers map to specific inside diameter / cross-section pairs; groups of 100 dash numbers indicate the cross-section family. A separate 900-series addresses O-rings for sealing straight thread tube-fitting bosses.
Configuration: O-rings are defined as toroidal sealing rings (note: ISO uses the term “O-ring”).
Normative references and terminology: Uses ISO 5598 vocabulary; prepared by ISO/TC 20 SC 10 (Aerospace fluid systems and components).

Practical applications and users

Aerospace design and systems engineers selecting seal sizes for non-hydraulic components.
O-ring manufacturers and mold/tooling designers producing inch-series elastomeric seals.
Procurement teams and suppliers specifying dash-code parts for inventory and replacement.
Quality, inspection and maintenance personnel verifying dimensional conformity during acceptance testing and repair.

Using the standardized inside diameters, cross-sections, and tolerances streamlines sourcing, reduces mismatch risk and simplifies maintenance logistics for aerospace operators and OEMs.

Related standards

ISO 16031-1 - Part 1: Close tolerances for hydraulic systems; covers nitrile and EP materials and small diameters (≤ 12.7 mm) referenced in Part 2.
ISO 5598 - Fluid power systems and components - Vocabulary (terminology used in ISO 16031-2).

Keywords: ISO 16031-2:2003, O-rings, aerospace fluid systems, non-hydraulic systems, inch series, inside diameters, cross-sections, tolerances, size-identification codes.

ISO 16031-2:2003 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

Fluid power systems and components — Vocabulary

Aerospace fluid systems — O-rings, inch series: Inside diameters and cross sections, tolerances and size-iden…

Systems and software engineering — Software life cycle processes

Asset management — Vocabulary, overview and principles

Asset management — Asset management system — Requirements

Information technology — Radio frequency identification device conformance test methods — Part 2: Test method…

Information technology — Multimedia framework (MPEG-21) — Part 22: User Description

Milk — Determination of the lactoperoxidase activity — Photometric method (Reference method)