Abstract
Statistical Process Control makes it possible to monitor the quality characteristics of interest, ensuring their maintenance within pre-established limits and indicating when to adopt corrective and improvement actions. The problem addressed in this work The large variation in the net mass of a volatile fuel derived from petroleum (gasoline A) stored in atmospheric tanks at a Fuel Distributor in Manaus-AM. Data on the variation in the volume of gasoline A were studied in the process of transferring between tanks. The data for the study were obtained from the Distributor's Net Cargo Tonnage Certificates (CNCT) and Quality Certificates (QC) and tabulated in an electronic spreadsheet using the Microsoft Excel software from Windows, in which the graphs of the volume variation values, specification limits (LSL and USL) and process control limits (LCL and UCL) were also plotted. All results point to an objective way of demonstrating the high degree of safety required in this process, the studied process control parameters that form the variation of the ambient volume and volume at 20 °C of gasoline A, remained within the limits of control and as for the capacity indexes it was concluded that the process produced high capacity indexes.
Highlights
Statistical Process Control (SPC) is a statistical technique applied to production that allows the systematic reduction of the variability in the characteristics of the quality of interest, contributing to the improvement of the intrinsic quality, productivity, reliability and cost of what is being produced [1]
The problem addressed in this work The large variation in the net mass of a volatile fuel derived from petroleum stored in atmospheric tanks at a Fuel Distributor in Manaus-AM
The data for the study were obtained from the Distributor's Net Cargo Tonnage Certificates (CNCT) and Quality Certificates (QC) and tabulated in an electronic spreadsheet using the Microsoft Excel software from Windows, in which the graphs of the volume variation values, specification limits (LSL and USL) and process control limits (LCL and Upper Control Limit (UCL)) were plotted
Summary
Statistical Process Control (SPC) is a statistical technique applied to production that allows the systematic reduction of the variability in the characteristics of the quality of interest, contributing to the improvement of the intrinsic quality, productivity, reliability and cost of what is being produced [1]. The production, storage and transport of fuels in terms of volumetric quantity is a growing concern, the volume of fuels can be compromised from production at an oil refinery or biofuel plant to the final consumer tank. The amount of fuel in storage and distribution tanks can undergo several changes, causing the volume to differ from the amount of fuel that initially leaves what was produced [2, 4]. The regulatory body for the activities that integrate the oil, natural gas and biofuels industries in Brazil, linked to the Ministry of Mines and Energy (MME), is the National Agency of Petroleum, Natural Gas and Biofuels (ANP), the federal agency that executes the national policy for the sector with a focus on ensuring fuel supply, product quality and protecting consumer interests [5]
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