U.S. Bellows custom designed duck work with turning vanes in the elbows for a dry tower leading to a main gas blower inlet. The duct work assemblies are fabricated from 316L stainless steel and designed for temperatures up to 150°F. The total assembly is 66" diameter and 749-5/8" long. The units were x-rayed, dye penetrant tested and hydro-tested prior to shipment.