Midwest Metal Products can make fabricated oval angle rings to connect your oval duct work. Oval angle rings are angle rings which are rolled to the correct diameter and then cut in to two 180 degree sections. Usually these rings have holes punched in them to facilitate bolting to another oval flange. After the round ring is cut in to two pieces, we weld in straight lengths with punched holes so make a compete oval angle flange. We are very experienced in making ovals from all sizes and types of materials in any diameter.