100 replies to this topic

[Art Montemayor]

Fastball:

You can download the Workbook directly yourself by going to the post just previous to yours, dated Sep 27th (on page 2 of 3).

Art Montemayor

[maud]

Hello Art Montemayor!

I am pleased and have become motivated when I realize that there is still people like you around. One just has to open her eyes and see the help that is out there for us students. I am a Chemical Engineering student @ University of Johannesburg, South Africa, and it is difficult for me at this institution to have access to the internet because of the limited number of computers. I would love to at least once a day visit this site, but it either means you skip classes and que to get your turn to use the internet.

Anyway, I will try to keep contact with the site; it helps me learn. I have realised that students have common problems they encounter in their studies. Thanx to the whole team you work with. I would love to futher my studies abroad one day.

[rmv]

Hi Montemayor,

It is really great! Also would like to express my sincere thanks for the effort taken to cascade them for the beginners/ engineers.

Anyway, it would of great helpful if you could do something with regard to calculating moments forces and to design the saddle and skirt for the horizontal and vertical vessel respectively.


At present, the software in the market do not support in terms of calculating them based on the input, but you need to calculate and enter in the input data.


In other words, if your workbook has these features, it will be really good and much helpful for the beginners and concerned fellow engineers.

Calculating moments and forces based on the load, you may assist to bring the design basis (simply the thickness of base ring, skirt thickness for vertical vessel and base plate for horizontal vessels). Mostly, it is very difficult to calculate the moments and forces for the vertical vessel, for which you may provide the simple thumb rule or simple equations to calculate them.

With the previous effort that you took to come out with such a nice work sheet, I hope you can really give an attempt to do in this regard as well.

Thanks

RMV

[Allen]

A very interesting thread. Strength of materials and design of vessels was a mandatory element in the first year of my degree course. The final year design project also required mechanical design. Whilst I no longer feel competent to undertake a rigorous design of a vessel, the teaching I received enables me to carry out a first step outline design and to appreciate the key issues.

I find it remarkable that there are chemical engineering courses which do not address this important area. Perhaps someone could tell me where graduates are supposed to obtain this competence? Through post graduate training or do design teams have a tame mechanical engineer on tap? In my early R & D days all mechanical design was done in house by chemical engineers.

[JEBradley]

Not sure why im writing this as the post has already been taken over by begging letters!!!!! (sorry, im in a stuck-at-work strop).

Going back a bit in this thread - I would agree that the task of pressure vessel design is better carried out by a mechanical engineer. But.....

For my design project everyone in the group had to conduct a chemical engineering design on a couple of pieces of kit and then each team member had an individual specialist item. this included a mechanical design, an economic appraisal, an environmental impact appraisal and so on. Whilst these items are not the direct duty of a chemical engineer they are areas that you are expected to (at least partially) understand, and so covering them in the design projects helps to cover an area of training.

Actually I had to do a mechanical design on a shell and tube heat exchanger and it was reallllly hard. The first thing you need to do is get hold of a copy of you country's relevant design standards from the library (just my luck that it had been nicked when i went to look for it). But you should find the standards dont make things too complicated. Id imagine that a mechanical engineer would be expected to do a full FEM analysis to determine all the stresses involved, whereas you wont need to do that.

Anyway this post is getting far too lengthy (it'll be turning into one of Art's posts soon

[cammy]

HI Art,

I am chemical engineer, i am interested in your exel sheet for mechanical design of distillation column, kindly mail it to me. my id is: gaikwadkd@uniphos.com



thanks in advance.

k.d.gaikwad

[JEBradley]

Thanks Art for posting the spreadsheet - It's taken me quite a while but ive finally gone through it )

A lot has been posted in this thread - I just want to add my tuppeneth -

I don't think chemical engineers should be getting too involved with the mechanical design of pressure vessels. They are quite important things to get right and we shouldnt be arsing them up. That said it's important to understand things like material corrosion, vessel testing etc.

I definately think chem engers should receive more mechanical training. I think i speak from the opposite end of the spectrum to Art, as I received none and find myself struggling to catch up now. I remember being asked for the first time if I wanted PN16, RJT, threaded or blah blah (I stopped listening at that point).

This book that is recommended seems to cost £380 !!! does anyone have an electronic copy or failing this has anyone viewed 'Pressure Vessel Design Manual' by Dennis Ross - this is only £28 so seems slightly more favourable to me at the moment.

[proinwv]

I have collected several of these types of books, primarily to try to understand some of the final equations presented in the code. I have found answers to some and not to others.

The books I have collected go from about 1937 pub. dates to present day. You will find many interesting facts, including suggested solutions not in the code. However, I don't believe that you will be a competent designer, if you don't have the background through education and/or practice.

I have not seen the book you reference.

In using ASME VIII Div 1, one will find that there are many situations not covered specifically by the code, and requiring engineering judgement using accepted engineering practice.

By the way, I am a ME. I hang around you ChE's because I like the company.

[nadirsha]

Hi Art,

Can you please send me the work sheet.

My email is nadirsalu@gmail.com

best Regards

Nadirsha

[yashraj]

Dear Sir,

I'm Yashwant Rajeshirke from India studying in Pune university. Could you please send me the Excel workbook. thanks

Regards,
Yashwant

[yashraj]

Dear Sir,

I'm Yashwant Rajeshirke from India studying in Pune university. Could you please send me the Excel workbook. thanks my email id is yashraj.242007@gmail.com

Regards,
Yashwant

[alicia21]

Hi Art,

I am a final year student at the University of the West Indies currently designing a pressure vessel. I would greatly appreciate a copy of the workbook.

Name: Alicia P
Country: Trinidad and Tobago
Email Ad: aliceglen@hotmail.com

Thanks,
Alicia

Hi Art,

I'm a final year engineering student at Universtiy College Dublin. I currently struggling with the design of a flash drum. Would it be possible to gert a copy of this workbook? My email adress is steven.ferguson@ucdconnect.ie.

Thanks

[Drow]

Hi Art,

I'm a final year engineering student at Universtiy College Dublin. I currently struggling with the design of a flash drum. Would it be possible to gert a copy of this workbook? My email adress is steven.ferguson@ucdconnect.ie.

Thanks

Hi, all, Art has posted his workbook on page 2 of this thread.

The book he refers to is Pressure Vessel Handbook , by Eugene F. Megyesy. I fortunaly just borrowed this book from my university's library. I spent one hour looking through similar books, and finallly picked this book (6th edition on 1983) and the most recent Pressure Vessels - the ASME code simplified (8th edition).

I am also a final year student in Chemical and Biomolecular Engineering at Nanyang Technological University, Singapore. However, I just made up my mind to be a process design engineer. However, I do feel that it is hard and I believe that every chemical eng, graduate has to go through this process and gain experience. I will work more on my design project, good luck to you all as well.

Finally, thanks to Art for sharing the knowledge and the effort to guide us.
I also appreciate Internet and this forum to link us all.

Dear Sir (Mr. Art),
Peoples like you are making this site very useful and i must say thanks to you.
Thanks a lot
Mj4u

Hi Art,

I'm a Junior ChE who just started working for an EPCM company in Canada. I'll appreciate if you forward to me your Work Book. I't will help me to understand Pressure Vessels design.
Thanks,

Name: johnHVC
Email: johnvillada_1@hotmail.com
Country: Canada

Regards

JHVC

[Vijay77]

Hi Art,
I am motivated when I go through your replies to various sessions.
I would really appreciate if you can forward me the pressure vessel workbook.
You are GREAT !!!

[mdteng]

Dear Art.
I'm agree with you. if students want to start to involve with the design of pressure vessels, Eugene Megyesy's book is good for very begginers.
My opinion as a mechanical designer, is that this book is not a good book for the design of complex pressure vessels.
Most of the formulas that are presented this book are based in the section VIII Div 1 of the ASME B&PV code and the Div 1 is based in "design by rule".
Div 2 of the section VIII of the code is "design by analysis" wich develops true concepts of the real mechanical beahvior of the vessel in service.

My preferred books about mechanica design are:
1) Process equipment design - Brownell and Young
2) Pressure vessel design handbook - Henry Bednar

and better thar Megyesy (is only my particular opinion) is the "pressure vessel design manual - Dennis Moss"

I hope that my experience will be useful for all students, because i suffered these topics during my carrer.

Regards

[srtools1980y]

hi
what do u mean by complex pressure vessels?
can u give few examples.
i am interested.

good day
srt

[nadirsha]

Dear Art,

Can you please send me the excel work sheet.

Best Regards,

Nadirsha

[mdteng]

Dear Srtools.
What i mean for complex pressure vessels are vessel subjected to complex stress/strain behavior that are not covered by the Div 1 of the code.

For Eg: Ciclic loads, von karman effect, multiple saddle supports, dinamic loads (other than seismic), etc. Typically, complex vessels are:
Very large horizontal water/oil separatos.
Reactors (due to the complexity of the internals).
Reaction Furnaces.
Thin and tall Columns.
Spheres.
Cold Boxes, etc.

Generally, most of these vessels requires a detailed analysis than only apply a formula, and sometimes requires a FEA analysis due the complexity.

But, if you have to design an air receiver, KO drum, surge drum etc. you can use the Megyesy's book.

Continum Mechanics is not so simply. In my experience as a designer, i saw several mistakes in the designing of pressure vessels applying the formulas without having the concept of mechanical (the same happens in any other engineering discipline).

As a little piece of advice, don't use formulas as a reciep.

[srtools1980y]

Dear Art
Please comment.
good day
srt.

[ARUNACHALAM AVANASHI]

Dear Sir,
I am authorized Inspector, regularly carrying out Design reviews for Pressure vessel.
My name is Arunachalam Avanashi, working with LR Insurance at Dubai.
I wish receive the excel sheet work book for the PV design. Kindly advise.

Thanks and regards

arunvani@gmail.com

[ARUNACHALAM AVANASHI]

Thanks for work book.

I have downloaded from the link provided by you.

Thnks and regards,
ARUNACHALAM