| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily allow a crossover piping even in a shallow layer burying when the crossover piping is performed without merging the other line. SOLUTION: In this crossover fitting 4 for piping, two types of pipes 1 and 2 are crossingly formed integral with each other without merging. The flow passage section height (h) in the overlapped direction of the flow passages overlapped with each other at a crossover part is smaller than the diameter (d) of the pipes 1 and 2 connected to the crossover pipe 4 for piping, and the total height T of two overlapped flow passages is almost equal to the diameter (d) of the pipe. The flow passage section width (b) of the pipes orthogonal to the overlapped direction of the flow passages is increased in inverse proportion to the reduced amount of the height to prevent the inner diameter sectional area of the pipe connected to the crossover pipe for piping from being substantially reduced at the crossover part.</p> |
