April 2011 - American Tube Mfg. Inc., Birmingham, Ala., is expanding its production capabilities to include 6-inch pipe and 5-inch square and comparable rectangles. Sizes will be available up to 5/16-inch wall-on-rounds and 1/4-inch wall-on-shapes. The expansion includes new mill stands and a new, larger accumulator. Shipments are expected to start in April.