| 摘要 |
PROBLEM TO BE SOLVED: To provide a piping structure for scissors capable of reducing an area of fins for closing between a short bend elbow at a lower end of a vertical tube and a short bend elbow at an upper end of a helical tube while satisfactorily assuring easiness of managing at a job site manufacture and an assembling work. SOLUTION: In the piping structure for scissors 1 comprising short bend elbows 4, 7 respectively mounted at a lower end of each vertical tube 3 for forming a wall of an upper part of a furnace of a boiler and an upper end of each helical tube 2 for forming a wall of a lower part of the furnace, bent in a direction separating from the wall, and connected from the elbows 4, 7 to headers separate from the walls by connecting tubes 5, 8, the elbows 4, 7 are constituted so as to have larger outer diameters x1, y1 than outer diameters x0, y0 of the tube 3 or 2 to be connected and inner diameters to be connected become equal to one another.
|
