Newcomer to storage and transportation, have a question
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I’m a newcomer to storage and transportation, and I have some questions, mainly related to MES. 1. Do mobile measurement and shift-based measurements mean that after on-site measurements are taken by field staff, the internal staff enter those measurement data into MES, using the heights obtained from the manual measurements? What should be done if there is a large discrepancy between manual measurement and the readings from instruments? 2. During the end-of-week inventory check, measurements are taken; what should be done if the data obtained after the inventory check differ significantly from the original measurement values? Based on the measurement data at the end of the ten-day period? How to eliminate the error between the end-of-month measurement and the initial measurement? 3. Is the daily tank gauge for storage and transportation generated based on DCS data or MES data? Thank you, I hope someone experienced can give me some advice.
What is mobile gauging? Does it refer to dynamic tank gauging? This isn’t allowed, right? During the shift handover measurement, if a large discrepancy is found between the manual measurement and the readings from the instruments, the cause of this discrepancy should be investigated; if it is an issue with the instruments, then contact the relevant team to address it! During the inventory check of static tanks, if there is a significant deviation from the previous data, it is necessary to verify the accuracy of this measurement before identifying the causes of such deviation – factors such as failure to take measurements in a timely manner due to dehydration, or oil mixing, which can affect changes in the liquid level in the tank As for the data in the storage and transportation tank tables, it depends on the regulations set by your company. Where do your MES data come from?
Hello, first of all thank you for your helpful answer. Mobile gauging is the gauging performed before any change occurs in the receipt and delivery status of the tank. Our MES data is the data that is manually verified after reading from the tables. What I want to know is whether the gauge in the tank is generated using DCS data or MES data – which type of data do you use there?
Our MES system obtains data from the DCS; when the time is the same, the two sets of data are identical. In other words, in our MES system, once you select the appropriate time point, it will automatically retrieve the data from the storage tanks. Of course, one must constantly pay attention to the accuracy of the remote monitoring instruments, and verify their accuracy as required by regulations.
The measurement data differs significantly from that of the DCS; this should be noted down so that more attention is paid during subsequent measurements. Is the deviation still this large? If it is, the instruments need to be calibrated. During each inventory check, the manual measuring tool should be used as the reference. If there is a significant difference between the readings from the remote sensors and those from the manual tool, then calibration is necessary. For static tanks, both the measurements taken before and after the inventory should be based on the manual tool, while inventory checks should use the dedicated inventory measuring tool. If the readings differ from those of the DCS, it’s likely that there’s an issue with the DCS. Unless your staff doesn’t know how to take accurate measurements, the MES system works in the same way as the DCS – it’s just that the data is recorded at different times; for example, one set of readings might be taken 5 minutes before shift change, while another set is taken 10 minutes later. Such minor discrepancies are normal. What causes the differences between the inventory measuring tool and the standard measuring tool? Did someone fail to check the dimensions?