Unisource “Uni-Loops” are an ideal option for compensating for thermal pipe growth. Often, thermal pipe growth must be absorbed in piping systems where the substantial anchoring systems that bellows expansion joints would require are not present.
Since these “V” shaped flexible hose loops do not impose pressure thrust forces on the anchoring system, anchor loads are very low. The only forces involved are the spring forces required to flex the loops. Uni-Loops are an in-line connector and consist of a 90-degree pipe elbow with a flexible stainless steel or bronze hose leg connecting to each end of the elbow. 45-degee pipe elbows are located at the ends of the flex leg and end fittings are welded to the 45-degree elbows. End options are flanges, pipe threads, beveled weld ends, grooved ends, and copper sweat ends. Standard “Uni-Loops” are rated for either 2”, 3”, or 4” of motion, but can be build to absorb greater movements.
Since “Uni-Loops” do not impose thrust forces on the pipe system, a minimum of guiding is required. For steam applications, a drain port can be added at the center elbow. Loops can be configured with the 90-degree elbow hanging straight down or with support at the 90-degee elbow, can be positioned in an inverted position, horizontal, or in a vertical riser application. See the HVAC section under Special Market Focus more more information and submittal on Unisource Uni-Loops.