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Pressure Level in Pressure Vessel Requirement

I am very interested in learning API 520 and API 521 (everything about pressure relieving system). It is because that is the weakest point of me. I want to try make my understanding better, starting from pressure level.

I have heard and read so much about pressure terminology since years ago but still confusing until now. What was the MAWP, MOP, design pressure, set pressure, relieving pressure?

In this post I want to share what I read in API RP 521 (Guide for Pressure Relieving and Depressuring Systems). I read about some terminology in pressure level so that I hope I will not confuse about terms anymore.

Let’s see some terms in column Pressure Vessel Requirement. Read More

Difference between Base Load, Peak Load, and Load Following Power Plant

Yesterday I had a discussion about our current project. The discussion was actually not only limited to that topic, however a topic in general: power plant. When one has plan to build a power plant, he must know operational profile of the power plant. Is it used for base load, peak load, or follower load ? What does it mean?

In this picture I show you the difference between those three. Read More

Understanding Flammability Limit and Explosive Limit

Have you heard about Flammability Limit and Explosive Limit? What does it mean? What the difference? These day I kept wondering if flammability limit and explosive limit is the same? Since I have to check vent stack data sheet from our mechanical engineer, I need to put low flammability limit criteria. What is that?

Explosion occur when three conditions are met:

  • Fuel
  • Oxygen (air)
  • Ignition source (spark or flame)

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What is Redwood Viscocity

I just got a really embarassing experience as chemical engineer. Sometimes we deal with a really complicated problem and we can handle that. On the other hand, we handle a simple problem, but we can’t handle that. How if a chemical engineer can not convert the kinematic viscosity expressed in Redwood second into dynamic viscosity? That is my problem. It happened about two days ago. My boss apparently was really disappointed. Read More