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What is the maximum temperature for a non-special alloy steel valve?

  1. 343°C

  2. 425°C

  3. 925°C

  4. 650°C

The correct answer is: 650°C

The maximum temperature for a non-special alloy steel valve is determined by the material properties of the steel and how they can withstand heat without losing structural integrity or function. Non-special alloy steels typically lose strength and ductility at elevated temperatures. The value of 650°C represents the upper thermal limit where non-special alloy steel can operate safely without undergoing significant degradation or failure. At temperatures above this threshold, the efficiency and safety of valves can be compromised, leading to potential failures in a refrigeration plant where precise control of temperatures and pressures is crucial. Hence, 650°C is a well-established upper limit for non-special alloy steel valves, ensuring they perform reliably within expected operational conditions. The significance of this temperature is vital for operational guidelines in refrigeration and other industrial applications, emphasizing the importance of material selection based on temperature requirements.