What color frame arms indicate a high temperature classification for a sprinkler head?

The correct answer is blue, which signifies a high temperature classification for a sprinkler head. In fire sprinkler systems, colors are standardized to indicate the temperature ratings of sprinkler heads. A blue frame arm specifically indicates that the sprinkler is rated for higher temperature applications, typically ranging from 200°F to 300°F (93°C to 149°C). This color coding helps to quickly identify the appropriate sprinkler head for environments where the risk of high heat may necessitate a different operational threshold, such as in commercial or industrial settings that often experience elevated temperatures.

Understanding the significance of color coding in sprinkler systems is crucial for ensuring that the correct type of sprinkler head is used for specific applications. Using the wrong classification can lead to suboptimal performance in fire suppression, potentially compromising safety and compliance with fire codes.