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Hi mansari14, I agree that the critical Design parameters and details will not be shared by the vendor and the detailed design is done by the vendor in this case. I was doing these calculations for my self-learning purposes. I was only looking for the sizing requirements in terms of (1) Steam...

Hi FMJalink , I checked the normal operating and max operating pressures are 18 and 19 barg respectively. The DP is 25 barg. Pavan

Hi shvet, I agree but this requires a lot of documentation. I have had a chance to do this in the past. This is Greenfield project and I do not want to go this route. Can I use the Fire case scenario for vapor filled vessel to size the PSV to meet the code requirements as there is no other...

Hi All, I have to size a PSV located on the N2 buffer tank. The N2 buffer tank receives N2 from Air Separation plant at 19 bar(g). The vessel operates at 19 bar(g) at 34 Deg C. The vessel is designed per PED 2014/68/EU with a Design pressure of 25 bar(g) at 34 Deg C. The maximum pressure that...

Pavan Kumar (Chemical)(OP)3 Oct 24 20:26 Hi All, I am writing a report to share Knowledge about Design and Operation of Deaerators. I have gone through some very insightful threads in this forum on this topic such as the one shown below. I know there are two types of Deaerators (i) Spray Type...

Hi All, I am writing a report to share Knowledge about Design and Operation of Deaerators. I have gone through some very insightful threads in this forum on this topic such as the one shown below. I know there are two types of Deaerators (i) Spray Type (ii) Tray Type...

Hi MJCronin, I wanted learn about Deaerator sizing for my upcoming project. Thanks and Regards, Pavan Kumar

I already did. Thanks. I did not get the answers I was looking for so I thought of re-posting the question here. Thanks again.

Hi All, I am trying to size a Deaerator for two electric boilers that we will be installed for a client. Can anyone provide me the references or documents that I can use to learn about Pressurized Deaerator sizing. I am looking for the basis for the following calculations: 1. Air venting...

Hi Mr. Pierre, I did go through Pressurized Deaerators material in Spirax Sarco, I however wanted more detailed information and was looking for some book or some chapters from book or some references which I can use to perform sizing calculations accurately. I want to calculate the following...

Hi All, Can anyone provide me the references or documents that I can use to learn about Pressurized Deaerator sizing. Any help is appreciated. Thanks and Regards, Pavan Kumar

Hi georgeverghese, For Option 2 my proposal was to replace the existing 12" nozzle with 24" nozzle and then have 24" horizontal ad vertical runs with 1:40 slope for the horizontal run. The client has selected Option 1 and is aware of the risk of tank overflowing, plus they are not interested...

Hi katmar, I have not checked the cost of the air vent valve and compared it with the cost of 19 ft long 24" ID CPVC Sch 80 vertical riser pipe. I fully agree with your suggestion to use 24" ID vertical riser pipe but the client is really stingy on spending more money. I guess they will know it...

Hi katmar, Yes in the first option with 12" nozzle the horizontal and vertical runs both will be 12" with 3.5 ft elevation using two 90 Deg LR elbows as shown below). We could not use a constant slope as it has interfering with the walk-way. Do you see any problems with this kind of elevation...

Hi Everyone, I Thank you all for the great support I received. I completed my calculations and wrote the Report and submitted to the client to choose from the available options. I have a meeting with them today, I will update you on what option they choose. The options for the Overflow line I...

Hi katmar, Per your recommendation above, the 16" line needs to be sloped with 2.5% slope or it is the same without slope also. There is practical difficulty of sloping the line with a straight flange on the tank T-430. The client does not prefer it either. Thanks and Regards, Pavan Kumar

Hi katmar, I don't think there is any issue process wise to entrain the air all the way to the clarifier, but I will check with the client. If there is no problem entraining air will air that is trapped in the water not create increased pressure drop in the existing 14" line that is nearly 120...

Hi Katmar and LittleInch, Thank you very much for explaining in detail how the overflow line works when it is running full with the corresponding level increase in T-430 until all the entrained air is flushed out and no more entrainment takes place. Yes this would lead to cycling for sure...

Hi katmar, I presume you are calculating the pressure drop in 24" (DN 600) line assuming it to be full pipe. If not kindly let me know how you did it. Per PD Hill's paper, the line should be sized for JL*<0.3 not NFr < 0.3. Though in this case they are both same. Also the piping used here is...

Hi Harvey, Thank you for solving the negative velocity issue. (i) If I calculate the line using JL*<0.3 then I see that I would need a 26" line. But if consider established flow the line size required is 14" Sch 80 for 3/4 full pipe. So oveflow line would be 26" or 14" then?. The client...