A wide variety of round fittings are produced for high pressure including 90, 60, 45 and 30 degree elbows as standards, tees, laterals, reducing laterals, reducers, couplings, end caps, crosses, etc. Fitting ends are made with two inch male sleeves. Standard fittings have built in slip type beaded couplings.
Lapping of seams are in the direction of airflow. The finest continuous weld seams are made with Metal Inert Gas Shielded Welds (MIG). Welded seams are sprayed with zinc rich coating material as primer and for added corrosion protection.
Elbows, 1-1/2 times the diameter to centerline (long radius) is standard.
Particular attention is given to the entrance for conical tees, straight tees, and laterals. These fittings have a rounded entrance edge. They are not butt-welded square-entrance contractor-type fittings.
Fittings are machine cut on our State-of-the-Art Vulcan Plasma table, assuring manufacturing tolerance consistency.
Specialty configurations are available upon request. Some examples are as follows: Elbows (75, 15 and other degree angles are also available), a wide variety of different radii, fitting-to-fitting type joints are available.
As listed in the current SMACNA HVAC Duct Construction Standards. Other regulatory construction standards are available upon request.