GB/T 28285-2025 in English

Standard Revision Background and Technological Evolution

GB/T 28285-2025, "Aircraft Oxygen Systems Terminology," replaces the 2012 edition and represents the latest technological advancements in my country's aviation oxygen system sector. This revision not only structurally optimizes the terminology system but also reflects the evolution of aviation oxygen supply technology from traditional gaseous oxygen to advanced technologies such as molecular sieve oxygen generation and electronic control.

Terminology Architecture Analysis

The new standard reclassifies the terminology system into four categories: System Terminology, Equipment Terminology, Professional Terminology, and Test Terminology, establishing a more scientific and comprehensive classification system. This classification system better matches the actual composition and functional characteristics of aircraft oxygen systems.

In-depth analysis of key technical changes

Significant expansion of system terminology

The standard has added key terms such as Crew oxygen system (3.1.26), Passenger oxygen system (3.1.27), Portable oxygen equipment (3.1.28), and Oxygen distribution system (3.1.29), reflecting the trend of specialization and differentiation in modern aircraft oxygen systems. In particular, the clear definition of portable oxygen equipment provides a terminological foundation for the standardization of emergency lifesaving equipment.

Technical Upgrade of Equipment Terminology

In terms of equipment terminology, the standard has added 11 new terms, including electronic oxygen supply anti-g regulator (3.2.17), gas source treatment device (3.2.39), and flushing device (3.2.43). These terms reflect the technological evolution of oxygen systems from mechanical to electronic and intelligent. The definition of an electronic oxygen supply anti-g regulator clarifies its technical characteristics of "mainly controlling its functions with an electrical sensor, an electrical drive, and a digital program."

Refined Terminology

The terminology section has been updated with new concepts for modern oxygen supply technologies, including closed-loop control (3.3.4), pulse oxygen supply (3.3.54), centralized oxygen supply (3.3.55), and decentralized oxygen supply (3.3.56). The definition of pulse oxygen supply emphasizes the technical feature of "using an electronic control module to sense human breathing patterns," reflecting the development of physiologically adaptive oxygen supply technology.

Interpretation of Key Terms and Definitions

Aircraft Oxygen System (3.1.2)

The new standard expands the definition of aircraft oxygen system from "a protection system used to prevent hazards to personnel caused by high-altitude hypoxia and low-pressure effects" in the 2012 version to "a protection system used to prevent hazards to personnel caused by high-altitude hypoxia, low-pressure effects, positive vertical overload, smoke, and hazardous substances." It also adds clear descriptions of smoke protection and hazardous substance protection functions, reflecting the development direction of multifunctional integrated protection.

Pressurized Oxygen Supply (3.3.7)

The definition of pressurized oxygen supply has been expanded to include "to prevent hypoxia and decompression sickness at altitudes above 12 km, appropriate compensatory pressure should be established on the body surface when necessary." This clarifies the physiological basis and implementation conditions for pressurized oxygen supply, providing a clearer terminology for the design of high-altitude protective equipment.

Oxygen Equipment Performance Test (3.4.1)

This standard clarifies that performance tests must be conducted "equipped with a prosthetic lung to simulate human breathing, under conditions simulating takeoff preparation, cabin airtightness during high-altitude flight, and slow or rapid decompression of cabin damage." This emphasizes the authenticity and comprehensiveness of the test conditions.

Standard Implementation Recommendations

Application in Design and Manufacturing

During the design and manufacturing of aircraft oxygen systems, the terminology definitions of the new standard should be strictly adhered to, particularly with regard to the naming and functional descriptions of key equipment such as the oxygen regulator, oxygen mask, and compensation suit. It is recommended that an internal terminology standardization process be established within the company to ensure consistency between technical documents and drawing annotations and the national standard.

Application in Maintenance

Maintenance organizations should update their maintenance manuals and training materials based on the new standard, standardizing the use of relevant terminology. In particular, accurate understanding and use of standard terminology is required regarding oxygen cylinder pressure classification, oxygen pressure reducer type distinctions, and oxygen mask classifications.

Application in Training and Teaching

Aviation schools and training institutions should incorporate the new standard into their curriculum, focusing on explaining the structural features of the terminology system and the changes in the definitions of key technical terms. It is recommended that a dedicated terminology comparison table be developed to help students understand the continuities and differences between the old and new standards.

Technology Development Trend Outlook

Changes in terminology standards indicate that aircraft oxygen systems are moving toward electronicization, intelligence, and integration. In the future, more new terms related to digital control, intelligent monitoring, and adaptive oxygen supply may emerge. The industry is recommended to pay attention to the following technical fields:

1. Intelligent oxygen supply technology: Adaptive oxygen supply system based on physiological parameter monitoring
2. Lightweight materials: Application of new composite materials in oxygen equipment
3. Integrated design: Functional integration of oxygen system with other airborne systems
4. Green technology: Environmentally friendly oxygen production technology and oxygen recycling

The implementation of GB/T 28285-2025 will provide important support for the normalization and standardization of my country's aviation oxygen system, promote technological innovation and industrial upgrading, and make positive contributions to ensuring flight safety.