Test Separator - Otlets

[nickypaliwal]

Do we need to consider same chloride content in water, gas and Oil outlet line from test separator for Material Selection ?

Though simulation shows gas phase in gas outlet but there can be water carryover in the phase.

Also about water outlet ?

 

[Duwe6]

I would. With a little water carryover, and some time with just gas, you could get a dried crust of salt. So the concentration may be even higher than before the separator.

 

[nickypaliwal]

If the chloride level is high, then the water and oil outlet can be lined with some non-metallic however Gas outlet will need an expensive CRA. is there any other solution then going for CRA ?

 

[nickypaliwal]

If the chloride level is high, then the water and oil outlet can be lined with some non-metallic however Gas outlet will need an expensive CRA. is there any other solution other than going for CRA ?

 

[Duwe6]

Nope. Unless this is easy to get to, and can be made in one flanged piece.
At a refinery, there is a 80-ft run of 5-chrome P5 carbon steel that they knew was corroding somewhat rapidly. So to save $$$, this line was installed in Sch80 [service pressure is 40 psi], and scheduled to be replaced in 10-years or less. [Outage based schedule]. Might work for you; use something that will give 5 to 10 years service and schedule a replacement.
Keep in mind that all of this planning is still guesswork - your fluid mix and temperature is not anybody else's, it is unique. So your problems [or lack of problems] will be unique too. Make your best judgment, build it, and then watch it - NDT on a scheduled basis; keep that up until you get a feel for the mechanism(s) and time-to-failure.