To meet SMACNA deflection requirements on certain oval sizes AccuFlanges or oval angle rings are required for joint connections, along with intermediate reinforcements to meet SMACNA deflection requirements. USA’s proprietary oval pipe and fitting manufacturing process ensures the oval pipe and fittings fit together properly.ĪccuFlange joint connections are recommended to join oval pipe and fittings to reduce field installation time, particularly with double wall oval. Pipe in those sizes is made with a spiral seam, whereas minor axis sizes above 24″ is made with a longitudinal seam in 5ft lengths. The single and double wall oval duct and fittings we produce run from 5″ to 24″ minor axis in 6ft to 10ft maximum lengths depending on oval size. Click on the PDF catalog to see a drawings of our common fittings. If you need round fittings, let us know the function it is serving and we likely have what you need. Other stock material include Galvanneal (paint grip), PCD, aluminum, stainless steel, black iron, and perforated materials in stock. USA manufactures round fittings from 3″ to 80″ plus inches in diameter either single wall or double wall, out of galvanized steel using 26 gauge through 10 gauge. Joint connections are available in standard slip, AccuFlanges, angle rings, Spiralmate and others. Many types of fitting seams are available, such as spot welded, standing seam, riveted, stitch welded, solid welded, snap lock, maplewood and more. Our available stock materials include galvanized, galvanneal, stainless steel, aluminum or PCD materials. Our team manufactures products for many industries, standard low, medium or high-pressure HVAC systems, welded industrial exhaust systems, and medical fume exhaust systems. We also build a line of standard HVAC fittings, designed to fit spiral pipe that are produced in mass quantities and stocked for your immediate pick-up. We utilize efficient, skilled fabricators and specialized equipment to ensure fast turnaround of any custom fittings you might need. Our dust protective film is a cost effective solution to prevent the ingress of dust and debris into your installation.At USA, custom metal fabrication is how we started and it’s a niche we proudly fill today. Protect your spiral duct installation from dust and debris We can offer a full range of flat oval duct which is available on request please contact us for a quote. PLEASE NOTE - For a Spiral to Spiral connection a male coupler will be required. are also available for purchase through our website. Full range of fittings and accessories from bends, reducers, flat shoes, spigots, single blade balancing dampers, volume control dampers, access doors etc.Stainless steel tube and fittings available on special order.Suitable for high, medium and low pressure applications.The publications 180 pages cover ductwork application, materials, classification and air leakage define the technical information to be provided by system designers to ductwork contractors and look in detail at rectangular, circular, and flat oval ductwork). Manufactured with an air tight lock-formed seam conforming to DW/144. ( DW/144 defines specifications for sheet metal ductwork for low, medium and high pressure/velocity air systems.Manufactured from light gauge galvanised mild steel.bends, reducers, weathering cowls and the like will slip directly into the spiral ducting. Spiral Duct has female ends therefore fittings i.e. Description Galvanised Circular Spiral Ducting
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