Discuss the important function of the pipe rack as the bridge in the whole device. Introduce the confirmation of the span,width and height of the pipe rack,piping arrangement,the flexibility design of the thermal pipeline and the setting of the support and hanger. At last,highlight some notes,which are about the arrangement plan of important pipes. The optimization of all these factors mentioned would be helpful for the piping design of this part.%论述了管桥作为整个装置的桥梁的重要作用，介绍了管桥的柱距、宽度以及高度的确定、管道的布置、热力管道的柔性设计以及支吊架的设置，最后还着重指出了一些重要管道的布置方案注意事项。为此部分的管道设计提供了借鉴。
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