Deaerated feed water used in hot deaerated backfill lay up shall meet what dissolved oxygen limit?

The correct answer regarding the dissolved oxygen limit for deaerated feed water used in hot deaerated backfill lay up is based on industry standards aimed at preventing corrosion and ensuring the longevity of equipment. For such processes, the maximum allowable level of dissolved oxygen is typically set to 15 particles per billion (ppb). This low concentration is crucial because even small amounts of oxygen can lead to corrosive reactions in high-temperature and high-pressure environments, which could ultimately damage boilers and associated systems.

Maintaining dissolved oxygen levels at or below this threshold is essential for efficient system operation and protection against corrosion. It allows for effective steam generation and minimizes the risk of scaling or pitting that could occur if oxygen levels exceeded this limit. Ensuring that feed water is adequately deaerated before use plays a significant role in maintaining overall system integrity and performance.