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Venturi nozzles or Venturi tubes are used in pipe systems, in which the rate of air flow must be continually measured and recorded. At the same time the components and the methods used for measuring must be suitable for the demanding industrial marginal conditions and the media with which they come in contact. The diameters used for the reductions, as well as, where the measurements are taken, conform to the diameters where the tubes connect in the system and with the amount of air that needs to be measured.

Discolorations occur during welding due to oxidation. During operation these tempering colours would quickly lead to rust perforations and must, therefore, be thoroughly and completely removed. Pickling is the most reliable solution for this and is more dependable and cost efficient compared to brushing, grinding or blasting. In our LBF-pickling facility, both full immersion pickling and spray pickling are available. LBF full-surface pickles all stainless steel components – interiors and exteriors.

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.

Paint is used for large components that can’t be powder coated or when the existing counterparts or other components of the facility are already painted. A standard layer of paint is at least 80 µm thick; multi-layered coatings can have thicknesses of 120 – 240 µm. In these cases priming, intermediate and top coats are used. A layer-thickness measurement can be taken and a paint adhesion test (Cross-Cut) can be given for proof of quality.

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.

DUCoaT – coated ducts – our Halar-duct is used to handle a wide range of corrosive exhaust streams when even stainless steel won’t suffice. It can be used in microchip, solar, wastewater, laboratory and electroplating technologies. In each of these industries, chemical processes take place in which reactive substances are used. Consequently, an INTERIOR COATING system is needed – DUCoaT!