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Air Separation Plants (ASU)

ASU is a great place to start your chemical process engineering career Air separation units (ASU) are responsible for producing oxygen, nitrogen and argon at large scale. Not known by some chemical process engineer, ASU is responsible for supporting many processes as raw material or utility supplier. It is a great place to develop...

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Oxygen Hazard: Enriched Atmosphere

Oxygen is essential to life. However, the presence of oxygen-enriched atmospheres, i.e., air and gas mixtures in which the oxygen concentration by volume exceeds 23.5% at sea level or whose partial pressure of oxygen exceeds 0.23 bar, can lead to accidents. Not flammable in itself, oxygen supports and accelerates combustion. The potential fire risk...

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Pipe Numbering and P&ID

10”-HC-22A-025-Bc-PP. My home, my rules. What I am talking about? The piping and instrumentation diagram (P&ID) has info available for process design. Understand what each number and letter mean in this drawing save time and give you a map of the process. Reading pipe identification is one of the most basic skills chemical process...

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How To Identify Monitoring and Pressure Control In A P&ID

Pressure monitoring and control is very important in plant design and operation. This variable influences reactions, fluid flow, separation process, fluid properties and so on. Based on that, let’s see some issues that chemical process engineers must be aware of during the piping and instrumentation diagram (P&ID) development. PS. If you have any issue...

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Cold Box in Air Separation Plants

I will tell you why Air Separation Unit has square column. If you see an air separation plant you may wonder why they have a square column in their process. In fact that is not a distillation column but a box to minimize heat leak to the environment. We call this equipment COLD BOX....

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