GB/T 47258-2026 Active

1.1 This document specifies the requirements for protective caps and shields for valves of liquefied gas, dissolved gas, or compressed gas cylinders.
Note: Protective caps, shields, and other devices capable of protecting valves are collectively referred to as valve protection devices, which are used to protect valves of gas cylinders (including valves with built-in pressure regulators) during transportation.
1.2 This document applies to two types of protective devices for valves of gas cylinders: protective caps and shields. For the valve protection performance tests of other devices connected to gas cylinders (such as gas cylinder handling devices), refer to the relevant standards.
1.3 This document does not apply to:
—— Valve protection devices on gas cylinders with a water capacity of not more than 5 L;
—— Valve protection devices fixed by welding to the ear plates of gas cylinders;
—— Valve protection devices directly welded to gas cylinders;
—— Valve protection devices for breathing apparatus gas cylinders, liquefied petroleum gas steel cylinders, and cryogenic insulated gas cylinders.
1.4 This document does not specify the functional requirements of valve protection devices for gas cylinder lifting applications.