1.1 本试验方法包括使用电子水分分析仪测定气体燃料的水蒸气含量。这种分析仪通常使用基于五氧化二磷的传感电池 2. O 5. ，氧化铝，铝 2. O 3. 或硅传感器压电型电池和基于激光的技术。 1.2 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 燃气中的含水量是影响内腐蚀的主要因素。水合物是碳氢化合物和水的半固态混合物，在适当的条件下会形成，造成严重的运行问题。燃油热值因水浓度而降低。因此，经常在天然气系统中测量水浓度水平。常见的管道规格为4至7 lb/MMSCF。本试验方法描述了使用直接读数电子仪器测量水蒸气含量。

1.1 This test method covers the determination of the water vapor content of gaseous fuels by the use of electronic moisture analyzers. Such analyzers commonly use sensing cells based on phosphorus pentoxide, P 2 O 5 , aluminum oxide, Al 2 O 3 , or silicon sensors piezoelectric-type cells and laser based technologies. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Water content in fuel gas is the major factor influencing internal corrosion. Hydrates, a semisolid combination of hydrocarbons and water, will form under the proper conditions causing serious operating problems. Fuel heating value is reduced by water concentration. Water concentration levels are therefore frequently measured in natural gas systems. A common pipeline specification is 4 to 7 lb/MMSCF. This test method describes measurement of water vapor content with direct readout electronic instrumentation.