Boiler Feedwater - Deaeration

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A boiler recovers heat from burned fuels. This is accomplished when high pressure boiler feedwater inside tubes located throughout the boiler is heated and turns into steam or hot water. The steam or hot water is then used in a variety of facility processes. Boiler feedwater often contains dissolved oxygen, which is a common cause of corrosion inside boilers. The dissolved oxygen reacts with the boiler's waterside metal surfaces to damage boiler tubes, headers, and drums. Corrosion can become more aggressive depending on the concentration of gas, pH, and temperature of the boiler feedwater. Therefore, the purpose of deaeration is to remove dissolved oxygen, carbon dioxide, and other non-condensable gases from boiler feedwater.

[@steventasker235]

What does an inspection opening on a large feeder tank typically look like? Is it above the water level? Or does the tank have to be drained to allow the inspection opening to be opened? Also how is it opened for example, is it bolted shut?

[@steventasker235]

Convergence Training thanks very much