Hi,
I'm totally new to pressure vessel design equations and so I have a some questions.

BTW I have the ASME 2010 codes, just having trouble bouncing around the pages trying to find what I require.
So please quote pages and tables to save your time and your fingers.

Example:-
I want a electrically heated pressure vessel that has a maximum working pressure of 2.2Bar. (138 Deg C approx)
A mechanical purge valve that removes air and normally shuts off around 105 deg C
A safety valve that opens at 2.5 bar (in a fault condition) and stays open until 2.2.bar and then recloses. repeating if needed.
A control system, that could if used incorrectly, be set to 150 Deg C maximum.

What if the safety Valve fails? how do I cover for that? though that would require a single fault to occur first.

How much should the hydrostatic test pressure be?, 1.5 x working pressure or 1.5 x design pressure? Does the design pressure have to take into account the possibility of setting the temperature to 150 Deg C?

I keep seeing different factors of safety for ASME, starting at 1.5-2.0 in 2007 or 2.5 to 4.0 in 2010, gleamed from google.This is a huge difference! so what is correct?

Say for example I have a 316L stainless steel "lid" or "door" that is 18mm thick, Can I add stiffeners to allow use of a thinner, (say 15mm) door?

Is there an ASME formula so that I can work out maximum allowable URES, (allowed displacement)?

I am beginning to use Solidworks simulation and this reports factor of safety too.

I know I have to take the "gasket" equation in to account, but I can not seem to find a formula to take stiffeners into account.
To be a bit clearer, think of a laminated door, it has two faces with a honeycomb centre and so the honeycomb center gives the door its strength and rigidity together with the face material.
I can only seem to find a formula that will give the "door" plate thickness without stiffeners.

For you professionals out there these questions may seem silly, but we have to start somewhere.
Many thanks for reading my post and many more thanks if you can answer.
Pete

Pete,

sounds like you need profesional help.

I suggest you contact an experienced engineer from Manufacturer or enginering contractor who can assis in:

1) identify the applicable laws at the location of operation (e.g. by NB-370, the Synopsis)
2) specify the correct Code book (Section I, or Section VIII) and any applicable additional requirements.
3) review the drawing for problematic areas, e.g. corner joints, flat covers, stiffeners, etc.
4) set ground for the correct calculations by selecting formulas, values, and material properties. (solidworks is nice, but the Code requires specific formulas for many cases.)
5) establish the required / recommended NDE and Testing
6) find a properly qualified Manufacturer, or get qualified yourself.

DK