Sheet-metal corner piece for joining profiles of gas duct flange joint

摘要

A gas duct is provided with a flange joint formed of a plurality of sheet-metal profiles each fitted over a respective duct side edge and of a plurality of corner pieces each joining together the two ends of two respective profiles. Each of these corner pieces is made of sheet metal and has a pair of legs formed with reinforcing corrugations. The legs fit into the ends of the profiles at the corners of the ducts. At the corner between the legs of each such corner piece is a hole surrounded by an annular corrugation that ensures proper spacing between two such corner pieces in a bolted-together joint assembly.