outlet manifold pipe sizing 1

[faridg22]

hi
i want to determine what necessary size for outlet of manifold to carry a given flow rate of crude oil

 

[JoeChem]

Until you develop some awareness that providing meaningful help with a technical question requires some technical information the only answer you will likely get is: Good Luck.

 

[faridg22]

JoeChem
thanks for repling

ok
you are right
the idea is to install a new manifold to collect about 12000 bopd, and we have existing 8 in flowline, i am not sure wether 8 in is engouph ot not, i did made some calculations using pipedata software but the results was to use 6",which is litlle bit small.
what i want is very simple or concise procedure to determin the economic diameter
best rgards

 

[faridg22]

ok

it is a new manifold to be installed, we have existing 8" pipe we might use it, it depends on calculation.
the flow rate is about 12000 BOPD, i did some calculation with pipe data software but it seems not correct
all i need is a concise and understood method and formulas to determine the diameter necessary to transport this quantity of oil.
by the way such calculation should be done a process engineer, am i right.
regards

 

[dcasto]

How much pressure drop can you afford. What about revisions velocities. Answer those questions and you'll get your required diameter

 

[faridg22]

HI
operating service pressur is max 14.5 barg, pressur drop is from 2 up to 3 barg

 

[TD2K]

Faridg, you need to look at the length of line and the flow and pressure drop you can tolerate. You then check a couple of line sizes. Since the pressure drop varies as the ratio of the IDs raised to the 5th power, you really only find you have a couple of choices.

For your question, will a 6" line pass 12000 BPD with a dP of 2 bar (the lower of the range you gave) over its given length? 12000 BPD is 350 gpm. In a 6" line this is less than 4 ft/sec.