本文介绍了设计为满流的管道尺寸的选择方法。文中还讨论了摩擦损失显著且管道中的流量已知的情况，例如在分支系统中。根据管道的设计流程，选择最佳管道尺寸的正确方法是对多种管道尺寸的管道和附件进行详细设计，并选择成本最低的。选择管道尺寸时最重要的变量是峰值流量、平均流量以及能源和建筑的相对价格。包括6个参考文献、图表。

In this article, the methods for selecting the size of a pipe designed to flow full are presented. The circumstances in which friction losses are significant and the flow in the pipe is known, such as in a branched system, are discussed. Given the design flow for a pipe, the correct way to select optimal pipe size is to perform a detailed design of the pipe and appurtenances for a number of pipe sizes and select the least costly. The most important variables in selecting pipe size are peak flow, average flow, and the relative price of energy and construction. Includes 6 references, figures.