Dredge line components

An important part of the dredging process is the transport of  soil through pipelines and wear-resistant rubber hoses, the regulation of the mixture by dredge valves, and the discharge to and in the floating discharge lines. Wear resistance is a key requirement for these components. 

Wear resistant pipelines and rubber hoses

As a key component in the transport process and therefore in the dredging cycle, pipelines are exposed to varied and yet often high levels of wear. IHC America manufactures complete on-board pipelines to feed and discharge the mixture into and out of the dredger. They cover a range of pipe structures, varying from simple straight pieces to complex three- and four-branched pipe assemblies. For parts in the pipeline system that requireflexibility, rubber hoses are necessary. The range of innovative high-performance dredge hoses and flexible connections for slurry transport and jet water applications are designed to withstand the most severe wear. 

Dredge valves

The transport of dredged mixtures constantly calls upon reliable and effective flow control. Therefore, there is always a requirement for trustworthy and wear-resistant valve systems in the dredging process. Gate valves are key components in mixture transport and IHC manufactures two types: rubber ring gate valves to open and close a line; and regulating valves to control flow. 

Process valves are a key element for controlling the dredging process. Different kinds are available to ensure a safe and continuous process, thereby reducing the risk of damage to other components. These include breather, water supply, and non-return valves.

Turning glands

Turning glands are designed to allow pipes and components to safely rotate around their axes, thereby ensuring enhanced manoeuvrability and greater safety, even under extreme working conditions. They are available in three types

Floating discharge lines

IHC America provides a range of high-performance floating discharge lines, rubber hoses, ball joints and booster pumps for overboard slurry transport. 

Floating discharge hoses are required for slurry transport to the shore. Depending on the environmental circumstances, a combination of several types of discharge hoses and pipes is necessary for the discharge process. Floating pipelines are a cost-effective solution, as worn-out pieces of pipe can easily be changed by pulling the rubber floater over a new piece of pipe. 

Steel pipes, however, makes the floating lines less flexible and reduces their effectiveness in rough seas. Therefore, these pipes must be used in combination with floating hoses, which are a more flexible and yet extremely robust solution for discharging slurry to the shore. 

Rubber hoses without buoyancy – for example, pressure hoses or DTC BoneCrusher® discharge hoses – can be part of a floating line arrangement, such as a flexible land and vessel connection or add extra flexibility in the discharge line. Customized arrangements are made for all particular circumstances by means of a simulation program that shows the movements of the discharge line and calculates the required configurations. 

Ball joints provide a flexible load-bearing connection between sections of a pipeline. The principle field of application is in floating lines, with sections supported by pontoons or other means of buoyancy. The ball joints ensure a flexible connection of the different pipe sections and they are capable of transmitting high volume loads from one section to another. 

In case the pump on the dredging vessel is not strong enough for extra-long floating lineconfigurations, IHC also provides booster pumps for additional power to transport the slurry quickly and efficiently to the discharge location.