The working temperature range of straight compression tube fittings suitable for hydrogen production units is typically around -20°C to 232°C. Straight compression tube fittings made of stainless steel materials such as 304 and 316 can generally withstand a temperature upper limit of up to 450°C.

In hydrogen production units, the working temperatures of different hydrogen production technologies vary, as follows:  

- Alkaline electrolyzers: 65–90°C  

- Proton Exchange Membrane (PEM) electrolyzers: 60–80°C  

- Solid Oxide Electrolysis Cells (SOEC): 600–900°C  

- Methanol hydrogen production systems: Ambient temperature to 300°C  

When selecting straight compression tube fittings, it is necessary to determine the appropriate type based on the specific hydrogen production process and the temperature of the installation site. This ensures that the working temperature range of the fittings can cover the operating temperature of the hydrogen production unit, thereby maintaining stable performance and excellent sealing effects.