T/SWSA 003-2025 Safety technical specifications for the operation and maintenance of hydrogen-powered buses
T/SWSA 003-2025 Safety technical specifications for the operation and maintenance of hydrogen-powered buses
Basic Information
Scope
Main Technical Content: This standard specifies the technical specifications for safety management during the operation and maintenance of hydrogen-powered buses. The main content includes: (1) Scope: It defines the requirements for the daily operation and maintenance of hydrogen-powered buses, including vehicle commissioning inspections, technical requirements for driver safety management, vehicle parking and storage, daily inspections and maintenance, and decommissioning management. It applies to hydrogen-powered buses equipped with a vehicle-mounted hydrogen supply system with a nominal working pressure not exceeding 70 MPa, a storage medium of compressed hydrogen, and a storage hydrogen tank and its accessories with a working temperature not lower than -40°C and not higher than 85°C. (2) Terms and Definitions: It clarifies the definitions of vehicle-mounted hydrogen supply systems, fuel cells, fuel cell electric vehicles, fuel venting, purging, hydrogen embrittlement, and fuel cell stacks. (3) Vehicle Commissioning Inspections: It specifies multiple key safety checks and precautions for drivers before and after each trip. Firstly, drivers need to continuously enhance their safety awareness and strictly adhere to safety regulations to avoid any actions that may lead to safety hazards. Secondly, before starting the vehicle, they should conduct a thorough inspection of non-hydrogen-related components of the vehicle and the fuel cell electric vehicle's unique fuel cell system and vehicle-mounted hydrogen supply system to ensure no leaks and normal operation, with special attention to the integrity of components of the vehicle-mounted hydrogen supply system, such as high-pressure hydrogen storage containers, connecting pipelines, interfaces, and system frames. Finally, before the vehicle is ready to start, they need to check the fuel system pressure via the dashboard, monitor fault alarms, and confirm the normal operation of all safety monitoring systems to ens