成品油岸罐交接计量误差的产生原因及应对措施

Cause of metering error in shore-tank custody transfer of refined oil and Solutions

对成品油岸罐静态计量中的储油罐、量油尺、温度计、密度计等计量器具,以及测量油品高度、温度、密度等方法所导致的误差原因进行了分析,并提出有效的解决措施:在装船前后采用多点采样、多点测温的方式,分别测量罐内油品的温度和密度,在操作中严格遵守相应规范,同时加强对各种计量器具的管理和操作人员操作方法的专业培训。测算结果表明,通过以上改进措施可减少计量偏差0.5‰～4‰,从而大大减小人为操作误差引起的计量纠纷。同时,建议在有条件的情况下,优先考虑使用质量流量计作为成品油交接主要的计量方式。

Source of errors caused by tanks,dipsticks,thermometers,density meters and other measuring instruments in the static measurement of refined oil shore-tanks as well as measuring methods for oil height,temperature,density,etc.is analyzed and effective solutions are proposed.It is pointed out that multi-point sampling and multi-point temperature measurement should be used before and after loading to respectively measure oil temperature and density,and corresponding standards in the operations should be strictly complied with.Meanwhile,it is necessary to strengthen management of measuring instruments and conduct professional training about operation methods for operators.Calculation results show that the above improvement measures can reduce the measurement deviation by 0.5 ‰～4 ‰,thus greatly reducing measuring disputes caused by human operation errors.In addition,it is recommended to give priority to the use of mass flowmeter as the main custody transfer method of refined oils if available.