A mobile measurement/graduation lab (PIGL) has been designed for graduation of vessels and verification of capacity gauges by using a volumetric technique. Computerized mobile measurement devices of the second rank, mobile automated laboratories, graduated vertical reservoirs based on a volumetric technique, and standard instruments for measuring liquid level as a tool for level gauge verification, must be designed as a metrologic basis for the automated UGR-I and UTRO-3 reservoir systems and the PIGL lab.
It remains unclear how oil and petroleum products can be monitored in the course of transportation by railroad tank cars or in tankers. In particular, the volume and weight of crude and petroleum products loaded into tankers are currently estimated from on-land measurements (with automated monitoring stations or according to reservoir data). This is done because there are no facilities for measuring hese amounts on board the tankers.
By keeping track of amounts of liquid stored, operators maintain current data inventory and monitor and control activities. The former task is necessary for bookkeeping, planning, and distribution. The latter is essential for current control of acceptance and delivery of liquid products. The volume/weight method is commonly used to measure liquids. This technique includes measurements of the temperature, density, and level of the liquid and application of a graduation chart prepared by geometric or volumetric technique.
