Hi all,
My question is straight forward. Can you size a thermal relief valve FOR GAS ONLY SYSTEM? If yes, how do you calculate the load requirement?
I have gone through API 520 and 521, and nowhere do they discuss or explain thermal relief for a gas only system. I know 521 section 5.14 talks...
Hi experts,
I have a few questions about PSV sizing. I got some drawings and datasheets from a vendor for a fuel gas skid and I don't think the vendor calculations are correct. I will appreciate if you can help me with answers to the following questions:
(1) Fuel gas skid is designed for a...
I have a facility set up as shown in the attachment. It is a crude oil pump station. Oil comes in, it is metered and it is pumped to another facility.
We have valves on the suction and discharge side of the pump. To account for thermal relief we have installed a TRV on both the suction and...
Hi,
I am sizing relief valves for liquid system for the first time. I usually work with natural gas. I know the code/standard and the equations and I can calculate orifice sizes.
However, I do have a question regarding blocked outlet on a pump. The facility is a pump station with 18 inch...
Hi all,
I am working on a crude pipeline transporting around 3000 barrels/hour of crude.
I have done the system relief analysis, but have a few of questions:
Is blocked outlet a credible scenario? Especially at pump discharges? If not, why?
Finally, if sizing blocked discharge on a pump, do...
Hi,
Can anyone help me with how to size a sump? I have searched extensively for this and the only things that come up have to do with aquariums and aquatics.
So, how do I size a sump? What volumes do I use? Low level of all the vessels?
Also, how do you decide between an open or closed...
Hi everyone,
We are installing a new low pressure 2-phase separator in the field. The operating P is around 120 psig. The pipeline and the vessel are to 1375 psig @ 185 F.
I had a discussion with another engineer on how best to protect this vessel. His point is that since the operating P is...
Hi all, I am designing a fractionation train to recover ethane, propane and butanes.
Can anyone help me with typical condenser pressures and temperatures? Also, I have substantial methane in the deethanizer distillate stream that I would like to remove to get pure ethane. Can anyone help me...
I recently came across a P&ID that shows a shell and tube heat exchanger. In addition to increasing the temperature of the natural gas with the steam, the P&ID shows TEG going into the exchanger as a heat transfer fluid.
Does anyone have a practical knowledge of how this process work? Not how...
Hi everyone,
I am trying to calculate the CV for a back pressure valve (BPV). I have a BPV holding the pressure in a vessel to 50 psig, i.e the BPV is set at 50 psig. How do I calculate the CV for the valve? CV is dependent on the inlet pressure and pressure drop. However, since we have a BPV...
Hi all,
I am back with one more question (a simple one for those with experience) and will appreciate any help.
I am doing a sizing exercise for a gas plant and need to size some shutdown valves for a client. What pressure drop will be used in the CV calculations? Is it the operating pressure...
Good day everyone,
I do require some assistance on some datasheets that I am working on. The data sheets are for valves and a couple of the properties required are specific gravity and viscosity. As we all know Promax does not give these values for the overall streams but, instead, gives the...
I need help from anyone who's familiar with ProMax. I have a tank that gives off 2.169 mscfd of vapors (according to ProMax). Naturally, I thought this will be the volume we need to size for the flare (small flare solely for this tank vapor). However, I was told that that is not the volume...
Hi all,
I am trying to estimate the flue gas requirement for a proposed plant. I have been able to determine all FG needed for all processes except tank blanketing purposes.
People have directed me to API 2000, but it doesn't give you the blanket gas needed. API 2000 is used to calculate vent...
Hi all,
I am trying to estimate the flue gas requirement for a proposed plant. I have been able to determine all FG needed for all processes except tank blanketing purposes.
People have directed me to API 2000, but it doesn't give you the blanket gas needed. API 2000 is used to calculate vent...
When do you use reduced port valves and when do use full port ones? I'm working with a client that has same size of both types of valves, but there is nothing in their specification that explains when to use a reduced or full port. I asked for their preference, but they said it's up to me.
I...
I have just read ASME B31.3 for the second time and understand all other aspects of the standard, except calculating pipe size.
I can't find any section in the standard (B31.3) that deals with pipeline OD (or ID) calculations. The closest I can see is to determine the pipe thickness and work...
I have just read ASME B31.3 for the second time and understand all other aspects of the standard, except calculating pipe size.
I can't find any section in the standard (B31.3) that deals with pipeline OD (or ID) calculations. The closest I can see is to determine the pipe thickness and work...
I posted this on the mechanical engineering forum, but got no assistance. So I thought I'd re-post here and, hopefully, get some help.
==========================================================================================================================================Can anyone explain...
Can anyone explain explain the principal difference between B31.3 and B31.8. I know 3 is for plant piping while 8 is for gas transmission, but that is the extent of my knowledge.
I also created a line list based on the pipe schedule found at http://www.engineersedge.com/pipe_schedules.htm, but...
