FIELD: machine building.
SUBSTANCE: invention refers to flat channels for transportation of gaseous fluids, which includes channel wall that has two wall sections bent in relation to each other at right angle along the wall bend line. At least one of the wall sections has edge plank passing parallel to the wall bend line. Wall element has end flange passing perpendicular to wall bend line and covering at least one angle formed with the wall sections. End flange consists of edge flange that is bent in relation to edge plank at right angle and plank of end flange, which is bent perpendicular to wall bend line of the other wall section. Section of edge flange and angular section of end flange of plank of end flange are separated prior to bending of wall element by means of L-shaped interdependent separating section one bend of which extends in the direction of edge bend line of bent edge plank from edge bend line of bent plank of edge flange to the edge of bent wall element, and the second bend of which extends in the direction of edge bend line from wall bend line to edge line and changes to the first bend there.
EFFECT: invention improves reliability of the device.
12 cl, 9 dwg
