Anyone had any experience designing pressure vessel with flat head according to UG-34 Sketch (n)?
If yes, could you share what is your design consideration, especially for the threaded ring design.
Hi, I'm designing my own refrigeration system (NH3) where currently on designing the separator/receiver. I am familiar with pressure vessel and heat exchanger sizing but that as a mechanical engineer scope. Now, I need to do sizing and study of the V/L separator downstream of the expansion...
Dear All,
How do I generate properties (heat properties with enthalpy at each point) in KBC Petro-SIM? Something similar like below.
In KBC Petro-SIM, I don't usually use the heat exchanger for generating these table, I only use the stream function to generate properties since I only want to...
Hi,
In comparison between HVOF/TSA coating and painting, I need to know is there any alternatives to HVOF/TSA like using special painting/coating system?
I see that HVOF/TSA is the ultimate solution when dealing stress corrosion chloride (SCC) when applied on carbon or stainless steel body...
Hi,
I'm unclear of how the actual pressure vessel with U-stamp process? I mean I know that the design will be reviewed and approved by ASME AI, but what are the overall scope of the AI? Does the AI only review and approved the design? or will the AI witness any fabrication process? Some says...
As water boils at around 98.9 degC or 100 degC at 1 atm. During that phase change, the vapor fraction increases and liquid starts to reducing.
Does the increase and decrease of vapor and liquid respectively is called vapor-liquid equilibrium (VLE)?
georgeverghese,
That is what we usually did. We would go and ask client for complete vapor-liquid enthalpy so that we could determine the true LMTD for the heat exchanger.
Common response we get "don't you know how to determine the LMTD?". Following this, we would usually ignore these kind of...
PaoloPemi, you sir are very helpful. Thank you, I'll try your excel sheet and see the result.
Yes, basically (I think) I'm had to look for specific enthalpy because after I find the H(mixture) at specific temperature points, I had to make a cumulative enthalpy and from there multiply each...
Hello PaoloPemi,
The H(mixture) = H(Vapor) + H(Liquid) as you mentioned; I got the calculated duty closed to the required duty.
I also tried another method which H(mixture) = [wt. fraction (vapor) x H(vapor)] + [wt. fraction (liquid) x H(liquid)] and I get really close duty to the required...
I need to find the properties of a stream which is in two-phase. I'm only given separate properties i.e. liquid and vapor properties. I need to find the enthalpy for the two-phase mixture from the liquid and vapor enthalpy. See the table below:
I would really like to know how do I find...
KernOily, we did a cost evaluation and inclusive of the overhead and all other costings and in where I am now, manufacturing custom flange by ourselves if much more cheaper and as for the gaskets we know it had to be custom gaskets and that's one of our business that end-user/customer had to buy...
When designing a pressure vessel for heat exchanger you may never know what size you'd ended up with. If the size is within that in B16.5 then we could use the nearest size flanges but when the size exceed 24" (DN 600) then definitely B16.5 is out of the picture.
Yes I may go for 16.47 Series A...
I'm trying to find the ratio because I'm designing a custom sizes flanges, some says just use gasket seating width for the diameter of the raised face or just add 2 mm.
Just wondering if there are any practical rule I could use
I tried looking into B16.5 and ASME VIII Div.1 Appendix 2 and there are no mentioned what are the basis to determine the raised face diameter.
Is there any general rule of thumb to determine the basis of the raised face diameter?
The only close thing I found on ASME VIII Div.1 Appendix 2 is...
Hi Latexman,
Basically I have two separate properties for liquid and vapor. Each separate phase have it's own physical properties along with molecular weight. I wanted to know how do I determine a mixture properties from these separate properties.
For example, what I had in mind previously is...
Hi,
I'm not familiar with chemical process engineering, I need advise and help on how do I determine the density, enthalpy, thermal conductivity, specific heat and viscosity of separated vapor and liquid phase.
I'm designing heat two-phase stream heat exchanger and I need to use mixture...
Hello,
I never got this question from any client, but aren't we always calculate the duty of each process using Q=m x Cp x dT and this Cp we would usually used average between inlet and outlet? We received one question why are we calculating our duty using ONLY inlet side of the specific heat...
Dear gentlemen,
I truly appreciates your inputs and answers.
From all the responds, what I now understand is for example I needed 30 barg steam (boiler outlet) therefore I would need a BFP (boiler feed pump) of at least 40 barg or 50 barg? When it is said that pressure loss in boiler is far...
Hi,
I am very new when it comes to boiler system, design and construction but I knew a bit of steam generation.
What interest me is what is the operating pressure of the boiler? Does it the same as discharge pressure of its feed water pump?
For example for heat exchanger, when the inlet...
Thanks rense,
I agree that the best thing would just consult with client but my client told that they are having 3 phases at the exit terminal.
Okay, the unit we're about to design is a crude oil heater and the oil at the beginning (inlet) only consists of water and crude oil thus the liquid...
