Dear all,
I've got a question about the different design conditions one should considder to calculate a heat exchanger with fixed tubesheets.
Sometimes the customer defines the design conditions theirself, but for quotation requests most of the times no conditions are predefined.
Depending on...
You are right about the big ones, they have much experience and very skilled programmers.
But they are also expensive.
And for many people and situations, these big programs offer way to much possibilities. Sometimes it is only necessary to check some basic calculations, or to quickly calculate...
Short intro:
Last year, I wanted to learn C#. And what's better to learn a language then programming something 'usefull', so I started programming on a simple ASME calculation program. Nothing fancy with 3D and so on, but plain calculations in a nice (Windows) environment, with the ability to...
The code part is separate from the ability of the program to do this. I know Inventor can do this pretty easy, but even if we would use Inventor, we would need the code to create the flange from a long list of possible combinations and types.
But, the problem is that we use AutoCAD, and not...
Hello,
We are currently testing the use of dynamic blocks to improve our autocad system.
We've been testing all functionalities and find it very interesting, but there is 1 part that we do not understand.
Why is the 'polar array' in dynamic blocks different from drawing 'normal polar arrays'...
I've searched the internet quite some time to find answers to my 'strange' findings.
The calculation state shows 'calculated', so everything is fine. Now I can click on every blank cell, cells with static text, ..., the calculation state keeps saying 'calculated'.
But, is I dare to click on a...
Hello,
I have a spreadsheet with many calculations (ASME UHX calculations). Because of the number of calculations, it takes 10 to 20 seconds to see the complete results.
Because of it's slowness, I turned automatic calculation off, and now I press a button to force calculation.
The reason...
Thanks clindeman, I was thinking like this also, I only wanted to be sure there isn't a quick and easy way in excel to do this. I'll use this method.
TomBarsh, why wouldn't that be possible?
If a customer requires a heat exchanger according to TEMA and UHX, then I need a tubesheet thickness...
I have an excel workbook with different sheets.
On 1 sheet, I calculate the thickness of a fixed tubesheet according to TEMA, on another sheet I do the same for ASME-UHX.
All of the data that is used for both calculations is 'linked' with a formula ( ='sheet1'C2 for example )
But, there is...
I'm sorry about the axis-axel-axle-... issue.
English is not my native language.
And in Dutch, axis and axle are both the same word: "as"
Let's call it a shaft for a change.
I have attached a preliminary sketch of the wheel.
- Black: shaft
- Blue: wheel
- Purple: bearing
- Green: housing/frame...
Yes, I mean axel...
It's way to hot over here to think ... ;-)
To be complete:
The previous axel was designed for 250T vessels.
My coleague wants to reuse this one. The distance between the bearings will be smaller, because we replace the standard bearing houses by our own construction.
Since...
I'm calculating an axis for the wheel of a rotator to rotate large and heavy pressure vessels. (up to 500 tons)
Basically, it's nothing more then an axis, supported by 2 bearings, and a large wheel in the center.
The wheel is in fact a custom build part, made by welding 3 circular plates (20mm)...
Thanks for the answer,
I'll send this to the right person.
But how about the second part of this issue?
Is it allowed to use (until corrected by ASME) my own corrected tables? Of do we need to keep working with faulty values?
The scale is trivial in this case.
But, they are both logatythmic in my examples, just like in the ASME book, to show similar graphs.
It is true that we need to interpolate logatythmic between points, and that the results will be less rugged.
But, all this does not solve the fact that a point...
My fault...
I'm looking through the external pressure charts in ASME.
The charts I have found 'errors' are:
- CS-6
- NFN-12
- NFN-14
- NFN-15
- NFN-16
- NFN-18
The graphs I created in Excel are crossing each other, some worse then others, but it's certainly not very good looking. The values I...
