Tube arrangement for furnace wall

摘要

A spiral wound furnace has the spiral wound tubes (18) terminated at the upper end by a vertically sinuous tube (25) with an upper return bend (36) and a lower return bend (38). The lower return bend (38) has a restricted area connection (42) connected to spiral wound tube (18), while the upper return bend (36) has a restricted area connector (44) fluidly connected to header (16).