Dry protection of equipment and piping system during the construction of nuclear power plant

Equipment and pipeline system damage caused by atmospheric environment corrosion cannot be ignored due to long construction period or schedule delay. The method to fill gas into equipment or pipe system to isolate air, reduce or eliminate the inner surface corrosion. It includes several important steps. Through reasonable temporary device configuration and by a series of operations, the pipeline system and equipment are put into a safe and effective protection. (authors)