What type of gauge glass should be used during the dry out process, and why?

In the dry-out process of a boiler or similar equipment, the use of temporary glass is the appropriate choice due to its ability to withstand hazardous conditions that may lead to caustic damage. During this process, there is a risk of exposure to high temperatures and potentially corrosive substances that can occur when water is being removed. Standard glass, while it may possess chemical resistance, can become brittle under extreme conditions, increasing the risk of breakage.

Metal gauges, while offering temperature stability, may not provide the necessary visibility needed to monitor levels effectively during the dry-out phase. Additionally, using no gauges at all would limit safety and operational monitoring, making it impractical. Thus, implementing temporary glass is vital to ensure safety and functionality while minimizing the risk of damage from caustic exposure.