Dredging Hoses
The ongoing evolution of trailing hopper dredgers and the requirements for less maintenance, longer service life and resulting lower production costs for our customers have resulted in a new innovation from Trelleborg Ede: The RockTrail® slurry hose.
The patented RockTrail® concept is based on minimizing the polymer surface inside a slurry hose without compromising the bending properties.
This has been achieved by using white iron cast rings inside the layer of the slurry hose. The cross sectional shape of the cast rings in combination with the polymer properties offer an exceptional flexible hose with superior wear characteristics.
This type of slurry hose is very well suited to be used in ripping jobs, coral and caprock and other very abrasive and sharp edged solids like shell and blasted or pre cut rock. Lifetime of the RockTrail® hose will easily exceed the standard suction hose 20 fold and the current caprock hoses 5 fold.
RockTrail® suction and discharge hoses can be fitted in the standard trunnion and gimbal joints and can also be used as inboard suction and discharge expansion joints in the pump room or on the deck pipes.
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As a standard supplied with heavy cords layers, this hose offers bid advantages when used for transporting sharp materials. Although rubber is a very abrasive resistant material, it has less resistance to cutting. Therefore we vulcanize rings with a rectangular cross sections into the hose, preventing the transported material from cutting through the liner.
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Mostly used with these hoses are the rubber flange/steel backing flange and the Double Action flange. They can be supplied in any size, and depending on application, with 100% vacuum capability and high implosion pressures. For use with gimbals and in the ladder of cutter dredgers we can furnisch you with small bending radius suction hoses. Trelleborg Ede has just delivered the suction hoses for the largest trailing suction hopper ever built. In some applications heavy spring steel spirals are used to prevent the hose from kinking. We never use ordinary (thus cheaper) galvanized wire of suction hoses. Ordinary wire cannot cope with the high dynamic loads which occur for example when your suction pipe gets ocstructed. Trelleborg Ede spring steel spirals absorb these peak loads without the risk of collapsing. Heavy duty big bore suction hoses come equipped with rigid stell rings. This allows for smooth bending of the hose. |
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Steel bends are in various material handling systems a problem since wear will shorten the lifetime of the bend. Trelleborg Ede produces a wide range of pre-shaped rubber bends. The bends can be used in suction and discharge applications in various diameters and radii. The bends can be provided with several flange connections and the outer curve of the bend will have a thick abrasion resistant inner tube. We also produce conical preshaped rubber bends as where the reduction in diameter can be over the whole length of the bend or over a part of it
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Discharge hoses and sleeves. These hoses can be equipped with all the different types of flanges Trelleborg Ede supplies. They are available in any size, burst pressure up to 150 bar. Liner thickness specified applies to the inside of the hose as well as the flanges. Tricolour wear indicators are optionally available.
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These hoses, serving as discharge or suction hoses, are able to perform under the worst imaginable conditions. Used with very sharp materials like coral and caprock, the replaceble stell sections provide immunity to cutting while the rubber body allows for bending. Please take notice of the fact that these hoses require procisions to be made to prevent them from being bent beyond the mimimum allowable bending radius.
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Compensators and expansion joints. Our compensators, are used in various applications, for example to compensate for big displacements in piping systems or as flexible joints in lines inside ships or process plants. The compensators can be equipped with all the types of flanges mentioned before. The rubber used for the inner and outer layers is chosen with full regard to the working conditions.
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