PIPE FOR VENTILATION OPENING

摘要

PROBLEM TO BE SOLVED: To provide a pipe for ventilation opening for easy construction at low cost. SOLUTION: One end 1a of a pipe 1 manufactured by seam welding a jointed part 1d of a rectangular stainless steel sheet formed into a cylinder is made blind with a circular stainless steel sheet by welding. The pipe 1 is opened on the side of the one end 1a by providing a rectangular hole 1b thereon. On other end 1c is stuck a packing 2 so as to cover the entire circumference of the end. In the vicinity of the other end 1c, a flange part 3 made of a square stainless steel with four corners thereof formed into an arc and the center part thereof burred into a round shape is compressed with a burring side 3a facing the other end 1c of the pipe 1. On the four corners of the flange part 3 is provided a hole for securing to a panel 4 for an outer wall by a screw 5.