我国石油石化装置配管用材的外径问题

On the Problem of Outside Diameters Variation of Pipes & Pipe Fittings on Petrochemical Equipment

在我国现行的钢管、管件和法兰标准中，因两种外径系列并存，给设计、定货、施工、管理带来了诸多不便，对此进行了对比分析，并提出解决途径。

Many inconvenience, brought to the design, ordering, construction and management of pipes and pipe fittings by two current co - existing OD series in China's enforcing standards for steel pipes, pipe fittings and flanges, are analyzed and solutions are put forward in this paper.