Open body /hopper barge used for supporting mechanic dredge is operated by hydraulic system. Especially open body cylinder , which always works in the water, needs very high technical requirements due to the bad working environment,the high working pressure, the strict requirement for maintaining pressure,the difficulty of maintenance. Our company has successfully supplied hydraulic systems for over 20 open body barge, the specification of which is from 150M3 to 2000M3 .The scope of supply includes hydraulic power packages,hydraulic control system,hydraulic electric control system,cylinder, etc. For anticorrosion of the cylinder,we have alternative methods for customers to choose such as nickel-chromium plating,nanometer nickel plating, ceramics thermal spraying,etc. The certification of classification society will be applied.