What is the difference in “press-formed”, “segmented”, “gored”, “LSB”, and “tubed” elbows?
Press formed duct elbows are constructed in two halves with a welded seam. Segmented or gored elbows are fabricated using 15 degree increments of laser welded ducting to form the deviation length. LSB.(Lapped Seam and Buffed) elbows are constructed of 16 gauge material segments lapped over one another, spot welded and buffed smooth on the interior. Tubed duct elbows are constructed from a 14 gauge extruded steel tube with QF ends spot welded to each end.
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