International projects are often bid for using materials produced according to the ASME-code. These generally conform to European standards and can be given both American and European stamps of approval. Both standards are verified in the material certificate and the material is also stamped with both labels at the factory. Typical ASME-stainless steel materials are 304L, 316L and 321 – LBF is experienced and has the proper credentials in matters of purchasing, documenting, and processing.
Aluminium, being a light material (three times lighter than steel), is ideal for specific applications. In paper technologies, large amounts of extremely moist, steam-filled exhaust air is extracted through tightly welded, low-pressure duct systems. With regard to corrosion, AlMg3 is comparable to stainless steel for this type of application. However, being lighter it is less expensive and is a great advantage in respect to the supports and loads that the structure must already bear.
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.
In the electroplating technology, parts are dipped in baths for a corrosion-resistant coating, e.g. chrome or gold plated. Aggressive gases and liquids with acidic or alkaline components are used in these electrochemical processes. Conventional exhaust air systems with PPS plastic are replaced with state-of-the-art Halar coated pipe lines. An important advantage is “fire prevention” since our DUCoaT-System boasts a much lower fire load compared to PPS.
Stainless steel pipes for regenerative thermal oxidizer – RTO facilities at Exxon Mobil. The material is certified and PMI-tested (Positive Material Identification) on account of the refinery industries’ extremely rigid requirements for documentation, traceability and inspections. All welding is carried out under welding procedure specifications and qualifications. Non-destructive testing and approvals are done by TÜV, MTL and DEKRA.
Extraction systems for dust-laden filter systems are not only composed of fans, silencers, filter systems and cyclones, but also pipe lines (usually operating under low-pressure). This low-pressure has an advantage with regard to tightness; however, it also leads to higher demands on stability. Therefore, pressure, temperature and external loads (such as wind forces and bearing forces) are taken into consideration when designing the pipe – the thickness of the sheet metal, the flanges, as well as stiffening rings and inner reinforcements, are all specified in the design.