本手册旨在为天然气运营商提供全面信息，作为了解天然气性质以及评估、监测和管理可能影响管道运营和最终用途应用的天然气质量所需的“工具”。了解基本天然气质量管理参数对于管理现有天然气供应，以及确保从新的和不断变化的供应源接收的天然气能够在输配系统中安全接受，并与所有应用的历史供应互换是必要的。

This manual is intended as a source of comprehensive information for use as a "tool" for the natural gas operators necessary to understand properties of gas and to assess, monitor, and manage gas quality that could impact pipeline operations and end-use applications. An understanding of fundamental gas quality management parameters is necessary to manage existing gas supplies and also to ensure that gas received from new and changing sources of supplies can be safely accepted in the transmission and distribution systems and are interchangeable with historical supplies for all applications.