Skip to main content

Important terms in API certifications - CRV & IOW - II

Image
By

CRV can be understood by using a simple example of milk kept for boiling in a pot on a stove.





The motive, i.e. the reliability of this process has two main factors -

1) The milk should boil.

2) It should remain the vessel and not overflow.


There are three critical variables here -


      • Temperature 

Why is this a critical variable? 

Answer:
The melting point of milk is 92 degrees C. That is the optimum level.

If temperature is too low (30 degrees C), the milk may not boil at all.

If the temperature is too high (200 degrees C), it may burn quickly.


      • Vessel dimension = volume of milk is 1 ltr

Why is this a critical variable? 

Answer: 
Vessel volume < 1 ltr, milk will not fit in it in the first at all.

Vessel volume = 1 ltr, milk will fit, but will overflow on boiling

Vessel volume >1 ltr, milk will fit and not overflow.



      • Time

Why is this variable critical?

If the other two variable are at the optimum level, then - 

Too less time (~ 1 min), insufficient for milk to reach boiling point

Too much time (~ 2 hours), milk will boil and condense, taste will change

Optimum time (~ 10 min), milk will boil, not overflow, and the heating will be stopped at the correct time.



Thus, maintaining the three CRVs will help to initiate and complete the process of boiling milk perfectly.

So, whenever one has to decide the CRV for larger processes, the important questions to ask are -



      • WHY IS THIS VARIABLE CRITICAL? 
      • WHAT WILL HAPPEN IF IT DEVIATES? 
      • HOW BAD WILL THE DAMAGE BE?

WATCH THE VIDEO HERE



Reference: "Development of Corrosion Control Document Database System in Crude Distillation Unit", Junghwan Kim, Wonsub Lim, Younghee Lee, Seungnam Kim, Sang-Rok Park, Sun-Kyu Suh, and Il Moon, Industrial & Engineering Chemistry Research 2011 50 (13), 8272-8277 DOI: 10.1021/ie101871a


Read the other parts here -

Part 1
Part 3


https://corrospective.com/


😀Happy learning!😀




Labels:

Comments

Post a Comment

Welcome to the CORROSPECTIVE BLOG! Scroll along for more posts! Looking forward to your feedback!
P.S. Don't forget to check out the free quizzes!

Popular posts from this blog

CAREER OPTIONS IN CORROSION

By
  CAREER OPTIONS IN CORROSION The first time I studied corrosion was in 2009. The last 14 years have taught me one important thing - The path of a career in corrosion is not as straightforward as we are led to believe. Whether we are starting as a student of corrosion, or are entering the field after working as a non-corrosion person, there is always some career pathway that we are not aware of. There are research projects, certifications , audits, inspections , etc. EveryEng gave me the opportunity to share my learnings about the possible options in the field of corrosion . If you are someone who is starting or wants to switch to/between corrosion and its related fields, here is a short presentation for you! https://www.everyeng.com/mentor/course/view/3559864f 😀 Happy learning! 😀
Post a Comment
Read more

Electrochemical testing - part 3- What does an ammeter do?

By
 Electrochemical testing - 3 - Ammeter Poll Question WITH Answers: Description: Tafel polarization is a potentiodynamic test, where the potential is changed at a certain mV/time rate. The changes in the current flow occurring due to the potential change are measured using the ammeter. The ammeter is connected between the working electrode and the counter electrode. It is NOT connected to the reference electrode in any way . Check out the video for a detailed explanation Check out the previous parts here - PART 1 PART 2 For concise and focusSed courses, check out the website below! https://corrospective.com
Post a Comment
Read more

Corrosion in daily life - Blistering

By
All of us corrosion people head out of the house to work on coatings. And yet, we leave so many types of coatings behind in our house. The most commonly seen commodity is an electric box with switches. Usually they are coated.  This is an example of such an electric box. It shows blisters formed in the white coating. Such blistering occurs when water penetrates the pores in the coating.  Usually such parts do not come under the 'critical' category. Hence, the coatings are not very thick. Moreover, there is no coating inspector involved during the application. As a result, they are prone to early degradation. However, their position plays an important role in determining this time frame. Those boxes present outside the hose are exposed to the heat and cold. Usually they will be in a shaded area. So, they may not face the rain directly. Some boxes are inside the house in rooms. Those face the least coating damage. The image above is from an electric box in a bathroom...
Post a Comment
Read more