"DUST DUCT" is a total system of pre-engineered, welded metal ducting and fittings for dust control work.
There are different types of fittings in a full range in all diameters by half inch increments. These types and sizes cover almost 100% of the requirements for air pollution and dust control systems, excepting very unusual or extremely large jobs. Dust Duct fittings such as transitions and tapers are made with short straight end collars to permit joining by standard compressor couplings or flanges.