本文件描述了推荐的方法、相关设备和测试设置，以帮助理解和进行燃油系统部件的压降测试。提供了背景信息和建议，以提高测试结果的准确性和重复性。尽管是专门针对燃料系统部件编写的，但本文提出的方法、设备和建议同样适用于在利用不可压缩流体的任何设备上进行的压降测试。

This document describes recommended methods, associated equipment, and test setups to assist in understanding and conducting pressure drop tests on fuel system components. Background information and suggestions are provided to improve accuracy and repeatability of test results. Although written specifically for fuel system components, the methods, equipment, and suggestions presented herein apply equally to pressure drop tests conducted on any equipment utilizing incompressible fluids.