DIN477 (GAS CYLINDER THREAD)
DIN 477 is a German standard that specifies the thread types and dimensions for gas cylinder valves. It ensures that each gas type has a unique valve connection, preventing accidental mixing of incompatible gases. The standard includes various thread types, such as tapered or cylindrical Whitworth threads (W), cylindrical pipe threads (G), and metric threads (M).
Key Points:
Safety: By assigning specific thread types and sizes to different gases, DIN 477 minimizes the risk of incorrect connections, which could lead to hazardous situations. In Germany, the use of adapters to connect gas cylinders is prohibited, as they can bypass these safety measures.
Thread Types: The standard covers both tapered and cylindrical threads. For example, the W tapered thread is one of the types permitted by DIN 477 for gas cylinder valves.
Applications: DIN 477 is applicable to gas cylinder valves designed for test pressures up to 300 bar, unless specified otherwise.
By adhering to DIN 477, manufacturers and users can ensure compatibility and safety in gas cylinder connections.
