In our last blog we described how structural, or porthole, tubes are formed during the extrusion process. Structural tubing has weld seams that are a result of the extrusion billet separating as it enters the extrusion die, then fusing back together forming a tube as the aluminum exits the extrusion die. Later this year we will begin to offer another form of extruded aluminum tube: Seamless.
Over 54% of the extruded aluminum Profile Precision manufactures each year has a hole in it, on purpose, and some have more than 1! The tube is commonly referred to as “structural” or “porthole” tubing. The Aluminum Association describes these tubes as: “a tube produced by extrusion of a solid billet through a porthole die.