Water gauge glasses are checked for operation after light off at what pressure for a D type boiler?

Water gauge glasses are crucial for monitoring water levels in a D type boiler, and ensuring they are functioning correctly is essential for safe operations. After light off, the appropriate pressure range to check these gauge glasses is between 100 to 200 psig.

Operating within this pressure range allows for accurate monitoring of water levels while ensuring that the system is reaching a stable operating pressure. This range is established based on industry standards and the design characteristics of D type boilers, which typically operate efficiently within this specific pressure threshold. Checking the gauge glasses at this point ensures that operators can rely on the readings for safety and operational effectiveness as the boiler continues to heat and build pressure.

Higher pressure checks, such as those in the 200 to 300 psig or beyond, might pose risks, as the system may still be stabilizing, potentially leading to inaccurate readings or hazards. Thus, 100 to 200 psig is the optimal range that balances safety and functionality for the operation of D type boilers.