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DUCoaT – pipes and ducts with Halar-interior-coating are used in exhaust air facilities where highly aggressive exhaust process air from the machines is released into the atmosphere through the scrubber system. Available standards for pipes, fittings, connecting systems and special components, such as multi-leaf dampers and silencers, are compiled in our planning folder. Upon request we are happy to inspect rectangular systems and special parts, such as scrubbers, tanks and customer drawings to verify that they conform to FM regulations and stability.

The stainless steel casing consists of separate chambers with 3 interconnected heat exchanger installations and inspection openings. The apparatus is used in a facility manufacturing aspirin. Smooth interior surfaces are essential to comply with pharmaceutical hygiene requirements. Due to very low-pressures, strength calculations are performed to calculate and ensure the stability of the casing. For verification a pressure and leakage test is conducted during the final inspection.

Halar is an engineering plastic very similar to Teflon; their durability and coating properties are comparable. However, Halar has significant advantages with regard to fire behaviour. For fire safety requirements our DUCoaT-system replaces complete pipe systems made solely out of PPS- Polypropylene in many applications. The Halar coating is applied on the interior of pipe and duct systems to protect the stainless steel material from aggressive components in the medium, such as acids and alkalis. Almost every shape can be coated, even the smallest diameters of measuring points.

For the storage and mixing of bulk goods in the food industry, silos are usually designed with a conical outlet for an optimal handling of the goods. Cold-rolled steel is used for materials that come in contact with the media; if required corresponding material certificates are available. During fabrication, close attention must be paid to a gap-free welding and interior weld seams must be ground flush with the sheet metal (Ra<0,8 μm). The final surface is treated with ceramic or glass bead blasting.

Reactive silencers are usually only made of sheet metal or stainless steel and do not contain mineral wool, because in specific industries porous materials are avoided for hygienic reasons. However, this also creates a larger construction. The advantage is that it can be completely cleaned with disinfectants or steam cleaned. The silencers pictured here are located on the roof of a manufacturer of a nut-cocoa-spread which causes sticky particles in the exhaust air.

Vessels and pipelines in the food and beverage industries must be constructed to withstand stringent cleaning and disinfecting. A maximum roughness (Ra) of 0,8 µm is often required in the component interior. Foil wrapped, cold-rolled sheet metal (2B) is used and the weld seams are tested for flaws and ground flush with the sheet metal surface in several steps.

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