ISO 7313-2020 PDF

Full title and description

St ISO 7313-2020 — Aircraft — High temperature convoluted hose assemblies in polytetrafluoroethylene (PTFE). Specifies characteristics, construction and performance requirements for PTFE convoluted hose assemblies with corrosion‑resistant metallic braid used in aircraft fluid systems.

Abstract

This standard defines types, materials, dimensional and performance characteristics, test requirements and marking for high‑temperature convoluted PTFE hose assemblies intended for aerospace fluid systems. It covers assemblies for use at temperatures from −55 °C to +200 °C and at nominal pressures (depending on bore size) up to 6.8 MPa, and distinguishes non‑conductive and conductive inner‑tube types.

General information

• Status: Published (International Standard).
• Publication date: 20 March 2020.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.080; 83.140.40.
• Edition / version: Edition 2 (2020).
• Number of pages: 14.

Scope

Specifies requirements for high‑temperature convoluted PTFE inner‑tube hose assemblies with corrosion‑resistant metallic braid for aircraft fluid systems. Covers intended operating temperature range (−55 °C to +200 °C), nominal pressure limits dependent on bore size (up to 6.8 MPa), types (Type 1 = non‑conductive inner tube; Type 2 = conductive inner tube), qualification and routine tests, marking and restrictions (for example where special national authority approval is required if used in pressurized gas storage systems).

Key topics and requirements

• Definition of hose assembly types (non‑conductive and conductive PTFE inner tubes).
• Materials and construction: convoluted PTFE liner, metallic braid, fittings and corrosion‑resistant requirements.
• Dimensional and interchangeability requirements for common bore sizes and fittings.
• Operating limits: temperature range (−55 °C to +200 °C) and nominal pressure ratings (dependent on bore size, up to 6.8 MPa).
• Qualification and type testing (pressure, temperature, bending, leakage and electrical continuity for conductive types).
• Workmanship, identification/marking, traceability and preparation for delivery.
• Safety and application notes, including regulatory/authority approvals when used in pressurized gas storage systems.

Typical use and users

Used by aerospace OEMs, Tier‑1 suppliers, design and stress engineers specifying or selecting PTFE hose assemblies for hydraulic, fuel, pneumatic or other high‑temperature fluid lines; procurement and quality assurance teams for supplier conformity and marking; and maintenance, repair and overhaul (MRO) organizations replacing hoses to correct specification. Also of interest to certification bodies and regulators evaluating fluid system components.

Related standards

Commonly associated or cross‑referenced documents include the superseded ISO 7313:1984, other PTFE hose procurement and classification standards such as ISO 8913 (PTFE hose assembly procurement/specification), various EN aerospace hose and fitting standards (for fittings, fire protection and marking) and documents produced by ISO/TC 20/SC 10 governing aerospace hose assemblies and testing. National adoption and related procurement specifications may also apply.

Keywords

ISO 7313, PTFE, convoluted hose assembly, aircraft hose, high temperature hose, metallic braid, hydraulic hose, aircraft fluid systems, conductive inner tube, non‑conductive inner tube, hose qualification, aerospace fittings.

FAQ

Q: What is this standard?

A: ISO 7313:2020 is an international standard that specifies requirements for high‑temperature convoluted PTFE hose assemblies used in aircraft fluid systems.

Q: What does it cover?

A: It covers materials, construction, types (non‑conductive and conductive inner tubes), dimensional and performance requirements, test and qualification procedures, marking and limits on use (temperature and nominal pressure up to 6.8 MPa depending on bore size).

Q: Who typically uses it?

A: Aerospace OEMs, suppliers, design engineers, MRO organizations, procurement and quality teams, and certification/regulatory bodies involved with aircraft fluid conveyance systems.

Q: Is it current or superseded?

A: ISO 7313:2020 (2nd edition) is the current published edition (published 20 March 2020) and it replaces ISO 7313:1984. The standard is subject to periodic review and further revisions or new editions may be developed by ISO/TC 20/SC 10.

Q: Is it part of a series?

A: It sits within the body of aerospace hose and fluid‑system standards maintained by ISO/TC 20/SC 10 and is often used alongside other PTFE hose specifications (for example ISO 8913 and related national or EN procurement standards) rather than as a numbered multi‑part series.

Q: What are the key keywords?

A: PTFE, convoluted hose, aircraft hose assembly, high temperature, metallic braid, conductive inner tube, hydraulic, aerospace, hose qualification, marking.