本文以柔性管设计中广泛采用的Ｓｐａｎｇｌｅｒ关于管壁内力及变形的计算公式为基础，对最小管刚度、最小壁厚直径比、临界设计内压力、满足强度要求的壁厚直径比的取值范围及管道设计中壁厚直径比的确定原则作了探讨，为柔性管的设计提供了一个简单的方法。 This paper is based on Spangler’s widely used calculation formulas for internal forces and deformations in flexible pipe designs. The minimum pipe stiffness, minimum wall-to-diameter ratio, critical design internal pressure, and wall thickness-to-diameter ratio satisfying strength requirements The principle of determining the ratio of wall thickness to diameter in pipe design was discussed, providing a simple method for the design of flexible pipe.