Hello!
I am an electrical engineering student during my end of studies internship and I've been given the project of designing the instrumentation and control system of a nearshore oil & gaz storage plant. And I am wondering how to choose the proper instruments for my system to measure temperature, volume in tanks, fluid level in tanks, flow and density and also motorized valves to control the fluid.
Thank you very much!

 

Do you want us to answer you?? Do the work yourself first, that's how you will learn

 

Instrumentation
Pick a technolgy for whatever needs to be measured to be controlled.
Tank gauging instrumentation for high value contents is a different class than fill/empty level measurement. For instance, are multiple temperature measurements over an elevation gradient required?

Most manufacturers have a fill-in-the-blanks document that they might call an application data sheet. One selects materials of construction. sensing range, output types, installation specific requirements like hazardous area rating that is used to select the features needed for an instrument of a given technology.

Control
Write out a control narrative explaining what's being measured and what's being controlled. Create an I/O list. Pick a PLC, add some HMI's.

 

When choosing the proper instruments and equipment for an oil & gaz storage plant, you must clearly understand your requirements. You must first determine the size of your storage facility, as this will dictate which type of instrumentation you require.
Once you know the size of your facility, you can start determining what types of sensors are necessary. These may include temperature, moisture, gas levels, etc. Next come the physical assets, such as tanks, pipes, and pumps.
This includes flow meters, level gauges, pressure transducers/manifolds (PTMs), vacuum devices (VDs), and other monitoring devices. PTM sensors are often used in pipelines because they provide real-time data transmission so operators can quickly identify problems before they become serious.