ISO 10502:2012 PDF

Aerospace — Hose assemblies in polytetrafluoroethylene (PTFE) for use up to 232 °C and 10 500 kPa — Technical specifications and requirements

Title (English):

ISO 10502:2012

Aerospace — Hose assemblies in polytetrafluoroethylene (PTFE) for use up to 232 °C and 10 500 kPa — Technical specifications and requirements

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 19
Publication date:: January 26, 2012
Edition:: ISO IS 10502 edition 2 version 1
ICS:: 49.080

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Description (English):

ISO 10502:2012 specifies requirements for polytetrafluoroethylene (PTFE) hose assemblies for use in aircraft hydraulic, fuel and lubricating oil systems at temperatures between -55 °C (-67 °F) and 232 °C (450 °F) for Class I assemblies and between -55 °C (-67 °F) and 135 °C (275 °F) for Class II assemblies, and at nominal pressures up to 10 500 kPa (1 523 psi) (105 bar). The hose assemblies are also suitable for use within the same temperature and pressure limitations in aerospace pneumatic systems where some gaseous diffusion through the wall of the PTFE liner is tolerated. ISO 10502:2012 covers hose assemblies of the following classes: · class I: hose assemblies with fitting of corrosion-resistant steel or titanium parts [232 °C (450 °F)]; · class II: hose assemblies with fitting of corrosion-resistant steel and aluminium parts [135 °C (275 °F)], DN12 and larger.

Technical details

Technical committee: ISO/TC 20/SC 10 - Aerospace fluid systems and components
SKU: ISO 10502:2012

Abstract

Overview

ISO 10502:2012 defines technical specifications and requirements for aerospace hose assemblies made with polytetrafluoroethylene (PTFE) liners. The standard applies to PTFE hose assemblies used in aircraft hydraulic, fuel and lubricating-oil systems and compatible aerospace pneumatic systems (where gaseous diffusion through the PTFE liner is acceptable). It covers assemblies rated for nominal pressures up to 10 500 kPa (105 bar / 1 523 psi) and temperatures for Class I up to 232 °C (450 °F) and Class II up to 135 °C (275 °F).

Key topics and technical requirements

Scope & classes: Distinguishes Class I (fittings of corrosion‑resistant steel or titanium - up to 232 °C) and Class II (steel and aluminium fittings - up to 135 °C; DN12 and larger).
Materials: Specifies use of virgin PTFE inner tubes and corrosion‑resistant metals (stainless steels, titanium, specified aluminium alloys). Metals may be substituted only with equivalent, approved materials.
Construction: Hose assemblies comprise a seamless PTFE inner tube, corrosion‑resistant steel‑wire reinforcement, and aluminium/steel/titanium end fittings. Default end‑fitting geometry is a 24° cone unless purchaser requests otherwise.
Inner tube properties:
- Relative density limits: ≤ 2,210 g/cm3 (method A/B) or ≤ 2,155 g/cm3 (method C per ISO 7258).
- Longitudinal tensile strength ≥ 15.1 N/mm2.
- Elongation ≥ 200%.
- Electrical conductivity requirements: ≥ 10 µA for DN05–DN12; ≥ 20 µA for DN16+ (ISO 8829-1 test).
Dimensional & performance checks: Defines dimensional limits, minimum bend radii, bore passage (90% sphere check), linear density (weight) and effusion/negative pressure behaviour.
Testing & inspection: Requires qualification and quality‑conformance testing (tube roll, proof pressure, burst/operational pressures, impulse testing per ISO 6772), sampling procedures, and permanent marking (including fire‑resistance type per ISO 2685).
Limitations: Not intended for pneumatic storage systems; special media (e.g., oxygen) or usage beyond the listed limits require purchaser approval.

Applications and users

Practical uses: aircraft hydraulic lines, fuel lines, and lubricating‑oil plumbing where high temperature, chemical resistance and compact routing are needed.
Key users: aerospace OEMs, hose and fitting manufacturers, maintenance/repair organizations (MRO), procurement and quality assurance engineers, and certification authorities specifying component acceptance criteria.

Related standards

ISO 8829-1 (PTFE inner-tube test methods)
ISO 7258 (PTFE density methods)
ISO 6772 (impulse testing)
ISO 2685 (aircraft fire resistance)
ISO 5855-3 (threads for fittings)
ISO 2859-1 (sampling procedures)

Keywords: ISO 10502:2012, PTFE hose assemblies, aerospace hose, aircraft hydraulic hose, 10 500 kPa, 232 °C, Class I Class II, hose qualification, PTFE inner tube.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope & classes: Distinguishes Class I (fittings of corrosion‑resistant steel or titanium - up to 232 °C) and Class II (steel and aluminium fittings - up to 135 °C; DN12 and larger).
Materials: Specifies use of virgin PTFE inner tubes and corrosion‑resistant metals (stainless steels, titanium, specified aluminium alloys). Metals may be substituted only with equivalent, approved materials.
Construction: Hose assemblies comprise a seamless PTFE inner tube, corrosion‑resistant steel‑wire reinforcement, and aluminium/steel/titanium end fittings. Default end‑fitting geometry is a 24° cone unless purchaser requests otherwise.
Inner tube properties:
- Relative density limits: ≤ 2,210 g/cm3 (method A/B) or ≤ 2,155 g/cm3 (method C per ISO 7258).
- Longitudinal tensile strength ≥ 15.1 N/mm2.
- Elongation ≥ 200%.
- Electrical conductivity requirements: ≥ 10 µA for DN05–DN12; ≥ 20 µA for DN16+ (ISO 8829-1 test).
Dimensional & performance checks: Defines dimensional limits, minimum bend radii, bore passage (90% sphere check), linear density (weight) and effusion/negative pressure behaviour.
Testing & inspection: Requires qualification and quality‑conformance testing (tube roll, proof pressure, burst/operational pressures, impulse testing per ISO 6772), sampling procedures, and permanent marking (including fire‑resistance type per ISO 2685).
Limitations: Not intended for pneumatic storage systems; special media (e.g., oxygen) or usage beyond the listed limits require purchaser approval.

Applications and users

Practical uses: aircraft hydraulic lines, fuel lines, and lubricating‑oil plumbing where high temperature, chemical resistance and compact routing are needed.
Key users: aerospace OEMs, hose and fitting manufacturers, maintenance/repair organizations (MRO), procurement and quality assurance engineers, and certification authorities specifying component acceptance criteria.

Related standards

ISO 8829-1 (PTFE inner-tube test methods)
ISO 7258 (PTFE density methods)
ISO 6772 (impulse testing)
ISO 2685 (aircraft fire resistance)
ISO 5855-3 (threads for fittings)
ISO 2859-1 (sampling procedures)

Keywords: ISO 10502:2012, PTFE hose assemblies, aerospace hose, aircraft hydraulic hose, 10 500 kPa, 232 °C, Class I Class II, hose qualification, PTFE inner tube.

ISO 10502:2012 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

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