ISO 3007:1999 石油产品和原油-蒸汽压力的测定.雷德（Reid）法.
标准编号：ISO 3007:1999
中文名称：石油产品和原油-蒸汽压力的测定.雷德（Reid）法.
英文名称：Petroleum products and crude petroleum — Determination of vapour pressure — Reid method
发布日期：1999-10
标准范围
本国际标准规定了测定液态石油蒸气压的方法基本上或完全由烃组分组成的产品，或含有以下的氧化烃特定类型和指定的最大浓度。该方法不适用于这些浓度之外水平，也不适用于任何含有甲醇或注释1中未涵盖的其他含氧烃的混合物。注1含5个或5个以上碳原子的醚的最大浓度为15%(V/V)，乙醇为10%（V/V）。对于高级醇，最大浓度为7%（V/V）。注2就本国际标准而言，术语“%(V/V)”用于表示A的体积分数材料。对于含有甲醇或注1范围以外的其他含氧碳氢化合物的石油产品，应使用蒸汽压力测试方法。对于液化石油气，应使用ISO 4256。测试方法可以应用于蒸汽压超过10kPa的挥发性原油，尽管尚未评价精密度。本国际标准中描述了四种程序。程序A和B是替代装置Reid蒸气压高达180 kPa的产品配置，程序C适用于液体产品里德蒸气压高于180 kPa，程序D适用于具有里德蒸气的航空汽油大约50千帕的压力。蒸气压是挥发性液体的重要物理性质，对挥发性液体具有关键的性能影响汽车和航空汽油。蒸气压也是影响大气蒸发的性质之一，因此越来越多地用于与排放和空气质量控制有关的法规中。蒸汽压为也是在转移操作期间限制设备操作的性能和安全性的关键特性。注意，因为外部大气压力被蒸汽中最初的大气压力抵消腔室中，里德蒸汽压大约是37.8℃时的“绝对”蒸汽压。里德蒸汽压由于样品的轻微蒸发和水蒸气的压力，与样品的真实蒸汽压不同和密闭空间中的空气。
This International Standard specifies a method for the determination of the vapour pressure of liquid petroleumproducts consisting of essentially or wholly of hydrocarbon components, or containing oxygenated hydrocarbons ofspecific types and at specified maximum concentrations. The method does not apply outside these concentrationlevels, nor to any blends containing methanol or other oxygenated hydrocarbons not covered in note 1.NOTE 1 The maximum concentration of ethers containing 5 or more carbon atoms is 15 % (V/V), and for ethanol is 10 %(V/V). For higher alcohols, the maximum concentration is 7 % (V/V).NOTE 2 For the purposes of this International Standard, the term "%(V/V)" is used to represent the volume fraction of amaterial.For petroleum products containing methanol, or other oxygenated hydrocarbons outside the scope of note 1, a dryvapour-pressure test method should be used. For liquefied petroleum gases, ISO 4256 should be used. The testmethod may be applied to volatile crude petroleum with a vapour pressure exceeding 10 kPa, although theprecision has not been evaluated.Four procedures are described in this International Standard. Procedures A and B are alternative apparatusconfigurations for products with a Reid vapour pressure up to 180 kPa, Procedure C is applied to liquid productswith a Reid vapour pressure above 180 kPa, and Procedure D applies to aviation gasolines with a Reid vapourpressure of approximately 50 kPa.Vapour pressure is an important physical property of volatile liquids, and has critical performance implications forautomotive and aviation gasolines. Vapour pressure is also one of the properties affecting atmospheric evaporation,and is therefore increasingly used in regulations relating to emissions and air quality control. Vapour pressure isalso a critical property limiting the performance and safety of operation of equipment during transfer operations.NOTE Because the external atmospheric pressure is counteracted by the atmospheric pressure initially in the vapourchamber, the Reid vapour pressure is approximately the "absolute" vapour pressure at 37,8 °C. The Reid vapour pressurediffers from the true vapour pressure of the sample owing to slight vaporization of the sample and the pressure of water vapourand air in the confined space.
标准预览图
