目前在上供下回单管热水供暖系统设计中,为了避免上热下冷的垂直温度失调,常常设置跨越管,大多在立管上端一、二层设置,也有的除底层外其它层均设置。跨越管管径通常为 DN15或比散热器支管小一号,也有的为了施工方便与散热器支管同径。常见的五种跨越管形式如图1所示。 At present, in the design of the next-generation single-pipe hot water heating system, in order to avoid the vertical temperature imbalance of the upper heat and the lower temperature, a crossover pipe is often provided, most of which are installed on the upper side of the standpipe, and some of the other floors except the bottom layer are also provided. Settings. The diameter of the spanning pipe is usually DN15 or smaller than the radiator branch pipe, and some are the same diameter as the radiator branch pipe for the convenience of construction. The common five types of crossover tubes are shown in Figure 1.