Overview
ISO 2046:1973 - Gaseous breathing oxygen supplies for aircraft - specifies the pressure and quality characteristics required for gaseous oxygen intended for aircraft breathing systems. The standard applies primarily to oxygen as supplied by the manufacturer and can also be invoked at later stages of distribution. It defines measurable limits for purity, water, odour, flammability/toxicity, and solid particulates to ensure safety and compatibility with aircraft oxygen systems.
Key topics and technical requirements
The standard sets clear, testable requirements for aircraft-grade gaseous oxygen:
Applications and who uses this standard
ISO 2046:1973 is practical for organizations involved in the production, supply, testing, and regulation of aircraft breathing oxygen:
- Oxygen manufacturers and gas suppliers - to certify product quality for aviation customers.
- Aircraft manufacturers and system designers - to ensure oxygen system compatibility and safety margins.
- Airlines and maintenance organizations (MROs) - for acceptance testing, replenishment, and in-service checks.
- Regulators and certification authorities - to reference uniform acceptance criteria for safe operation.
- Safety engineers and procurement teams - to specify requirements in contracts and safety management systems.
Related standards and guidance
For implementation, users should consult current national aviation regulations and contemporary ISO standards covering gas handling, cylinder filling, and aircraft system certification. ISO 2046:1973 remains a reference point for defining aircraft-grade gaseous oxygen quality and pressure requirements.
