本文件描述了确定全球范围内石油产品、润滑剂和燃料质量规范中使用的试验方法等效性的评估。本文件的重点是确定密度的标准化试验方法在技术上是否等效。这是为了指导使用一种标准测试方法的实验室，并希望知道他们是否也可以向其他实验室认证产品

This document describes the evaluation to determine the equivalency of test methods used on a global scale in quality specifications of petroleum products, lubricants, and fuels. This document focuses on whether the standardized test methods for determining density are to be considered technically equivalent. This is to guide laboratories that use one standard test method and wish to know if they can also certify product towards the others