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Hydraulic Descaling


Scale-free surfaces increase quality and productivity

Clean surfaces are not just an external sign of high quality. The hydraulic descaling also ensures higher output, longer service life of valuable plant components such as rollers, forging dies and tools as well as less rework in the subsequent processes.

We supply complete systems for descaling steel semi-finished products and forgings. You achieve optimal descaling results through the perfect coordination of pressure, flow rate, impact angle and distance from the material.
Integrated into process chains, the systems work in sync with production. In this way, SGGT achieves short throughput times and high output. And with minimal cooling of the hot product and low water consumption, they conserve valuable resources.

We adapt our systems to existing conveyor systems or implement the entire handling from take over of the parts to forwarding them descaled to the subsequent processes. The largely automated, coordinated interaction of all conveyor components reduces temperature losses and increases productivity.


Hydraulic descaling is becoming more and more popular in forging. The spectrum of applications ranges from small workpieces weighing 0.5 kg to forged parts weighing several tons. Many are manufactured for the automotive industry, such as truck front axles or crankshafts for large engines. Axles, wheels and wheel tires for rail vehicles as well as large valve bodies for the oil and gas industry are also descaled with SGGT systems.
Today, our fully automatic systems are in use in many plants. They work with a water pressure of several hundred bar. Reliable processes, longer service life of tools and shorter downtimes lead to higher overall productivity. Especially with high-quality visible parts, the clean surfaces free of scale scars are an important optical quality feature.
We have developed the Microline systems as turnkey solutions especially for descaling of inductively heated billets. By integrating the feed and discharge in a uniform system, we not only optimize the descaling process itself. Workpieces such as axles and crankshafts undergo descaling in the specified production cycle. With the shortest possible transfer times from taking over the parts from the IBH discharge through the further processes, the parts hardly cool down.
The systems work with minimal amounts of water of a few liters per billet only, because the nozzles only open when a billet is within the effective range of the nozzles.

Rolling mills

Due to new materials composition and optimized heating processes, scale today adheres more stubbornly to steel than it did a few years ago. That is why we manufacture systems for the rolling mills that work with pressures of up to 400 bar.

In product-specific versions, they automatically adjust the distance between the nozzles to different product geometries and thus achieve an extraordinarily high effect when the water jet is applied to the surface. Heavy plate, for example, which is rolled from high-nickel-alloy slabs, is descaled by our systems with hitherto unattainable impact values.
We use spray bars for flat products such as slabs, heavy plate or hot strip. For long products - for example billets, steel bars and profiles as well as tubes and wire - we supply spray rings. For beams or rails, we adapt them to the respective contour.