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  2. NACA duct - Wikipedia

    en.wikipedia.org/wiki/NACA_duct

    A NACA duct, [1] also sometimes called a NACA scoop or NACA inlet, is a common form of low-drag air inlet design, originally developed by the U.S. National Advisory Committee for Aeronautics (NACA), the precursor to NASA, in 1945.

  3. Duct (industrial exhaust) - Wikipedia

    en.wikipedia.org/wiki/Duct_(industrial_exhaust)

    Industrial exhaust ducts are pipe systems that connect hoods to industrial chimneys through other components of exhaust systems like fans, collectors, etc. Ducts are low-pressure pneumatic conveyors to convey dust, particles, shavings, fumes, or chemical hazardous components from air in the vicinity to a shop floor or any other specific locations like tanks, sanding machines, or laboratory hoods.

  4. List of welding codes - Wikipedia

    en.wikipedia.org/wiki/List_of_welding_codes

    Specification for carbon steel electrodes for shielded metal arc welding AWS A5.18: Specification for carbon steel electrodes and rods for gas shielded arc welding AWS B1.10: Guide for the nondestructive examination of welds AWS B2.1: Specification for Welding Procedure and Performance Qualification AWS D1.1: Structural welding (steel) AWS D1.2

  5. Process duct work - Wikipedia

    en.wikipedia.org/wiki/Process_Duct_Work

    Duct dead loads: are often simplified (in Cement plant usage) by using duct plate weight, multiplied by 1.15 as a stiffener allowance, as duct stiffeners usually weigh less than 15% times the duct plate weight. Duct stiffener allowance for rectangular power plants ductwork may be 50% to 100% of the duct plate weight.

  6. Mechanical systems drawing - Wikipedia

    en.wikipedia.org/wiki/Mechanical_systems_drawing

    Labels for pipe, duct, and cable sizes where not shown elsewhere; Components that have a sensing and control function, and links between them—building management systems, fire alarms and HV controls; Major components, so their whereabouts in specifications and other drawings can be easily determined

  7. Design specification - Wikipedia

    en.wikipedia.org/wiki/Design_specification

    Construction design specifications are referenced in US government procurement rules, where there is a requirement that an architect-engineer should specify using "the maximum practicable amount of recovered materials consistent with the performance requirements, availability, price reasonableness, and cost-effectiveness" in a construction design specification.

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