What is the maximum permissible time limit for a hot deaerated fill lay-up?

What is the maximum permissible time limit for a hot deaerated fill lay-up?

• A. 7 consecutive days
• B. 14 consecutive days
• C. 21 consecutive days
• D. 30 consecutive days

Answer: (B)

The maximum permissible time limit for a hot deaerated fill lay-up is indeed 14 consecutive days. This practice is critical for preventing corrosion in equipment such as boilers and natural circulation systems. The hot deaerated fill lay-up method is particularly effective because it removes oxygen and other dissolved gases from the water, which helps to minimize the potential for corrosion during periods of inactivity. When the time limit of 14 days is reached, it is important to take action to either bring the system back into service or to implement a different lay-up method to ensure that the protective qualities of the deaerated water are maintained. If the equipment were to remain inactive for a longer period without proper protection, the risks of corrosion and associated damage would increase significantly. Hence, this specified time frame is essential for maintaining the integrity and longevity of the system.

The maximum permissible time limit for a hot deaerated fill lay-up is indeed 14 consecutive days. This practice is critical for preventing corrosion in equipment such as boilers and natural circulation systems. The hot deaerated fill lay-up method is particularly effective because it removes oxygen and other dissolved gases from the water, which helps to minimize the potential for corrosion during periods of inactivity.

When the time limit of 14 days is reached, it is important to take action to either bring the system back into service or to implement a different lay-up method to ensure that the protective qualities of the deaerated water are maintained. If the equipment were to remain inactive for a longer period without proper protection, the risks of corrosion and associated damage would increase significantly. Hence, this specified time frame is essential for maintaining the integrity and longevity of the system.