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ISO 23552-1:2026
International Standard
Control and protective devices for gaseous and liquid fuels — Particular requirements — Part 1: Electronic fuel/air ratio control systems, including associated sensors and mechanical actuators
GSO EN 521:2019+AC:2025
EN 521:2019+AC:2019
Gulf Standard
Specifications for dedicated liquefied petroleum gas appliances - Portable vapour pressure liquefied petroleum gas appliances
ISO/TS 21343:2025
International Standard
Oil and gas industries including lower carbon energy — Fuel ammonia —Requirements and guidance for boilers for power generation
ISO 23551-10:2025
International Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 10: Vent valves
GSO ISO 23551-9:2024
ISO 23551-9:2022
Gulf Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 9: Mechanical gas thermostats
OS GSO ISO 23551-9:2024
ISO 23551-9:2022
Omani Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 9: Mechanical gas thermostats
ISO 23551-1:2024
International Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 1: Automatic and semi-automatic shut-off valves
ISO 23551-11:2024
International Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 11: Automatic and semi-automatic shut-off valves for operating pressure of above 500 kPa up to and including 6 300 kPa
ISO 23551-12:2023
International Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 12: Multifunctional controls with integral overpressure protection safety function (OPSF) for use with butane gas cartridges used in portable gas appliances
ISO 23551-8:2023
International Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 8: Multifunctional controls
ISO 23551-5:2023
International Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 5: Manual gas valves
ISO 23551-9:2022
International Standard
Safety and control devices for gas burners and gas-burning appliances — Particular requirements — Part 9: Mechanical gas thermostats