Recent content by nouanda

Sure it's not perfectly dry, but it's enough to require a dry pipeline (for this project, max BSW are 0.1%vol).

dear all, thank you for your guidance. Biginch > actually, it's not crude oil, but stabilized oil (so it's dry). thanks for the info about the cleaning sequence for cleaning (with brush pigs and soft foam pigs, I’ll keep it in mind for the future). Unfortunately, I don't decide of these...

Hi all, My company will start a new oil pipeline. The builder will deliver it just after removal of the water used for hydrotest, so the pipe will be wet and full of air at atmospheric pressure. We decided to send a train of 3 pigs (nitrogen + nitrogen + oil) to clean and dry the pipeline...

I am not sure either... to be honest, I posted here, because a colleague was searching for a translation (we're French), but even in French, we don't know how to call this (and everybody knows we are good at creating complicated words for technical applications!) The only thing we can imagine is...

Thank you all for your attention. Gerhardl: the cone is actually inside the ball. This valve is used on a circuit that may be subject to plugging. When the valve is plugged (due to the cone), the operator rotates the valve at 180°, then the dirt can be easily removed. that's why I posted my...

Dear all, I need your experience for a very small problem... How do you call a ball valve whose passage is smaller at the outlet than it is at the inlet? (see the attached drawing) Thanx Nouanda

dam! I didn't see the date of the post... I think I'm too late...

Flash is good idea, but it will be better if ran continuously. otherwise it will just be a single-plate-vacuum-batch-distillation... I used to work in a company specialized in ethanol distillation, I kept some of the home-made spreadsheets. I can make a quick simulation (mass and heat balance)...

Hi all, Some news about this issue (yes, I'm still working on it!) Finally, it has been decided with the client to decrease the maximum flow down to 417000Nm3/h, and to respect a criteria of Mc 0.9. Our approach changed a little: We decided to divide our pipe into differents pieces of...

The idea of an orifice comes from an experienced guy in my company, who I use as a referee for my calculations. I won't say the name, I don't want to discredit it (I mean, the company, not the guy...) Even using a 8" pipe doesn't solve the problem completely, because I find it is still...

Thanks all The idea was to put a restriction orifice at the outlet, so that in the pipe, I can have 32.2bar, and 1 bar outside.

sorry to flood, but I post while I'm checking my calcs... If I want to calculate the pressure at the end of the pipe to have Mach 0,7 (par exemple, zum Beispiel, as an example...), I calculate the flow for u=Mach 0,7. I take my Mach No at the inlet conditions, but it shouldn't change so much...

Thank you all for your guidance, and thanks for the time you spent checking my errors. Well, I thought about it this week end, and I must say I am lost... I was wrong when I calculated the speed, since I used the speed at the discharge of the PSV, not at the end of the vent. At the end of the...

BTW, I meant "we laways use the *word* reducer". Expander would be "élargissement", which is far less smooth to say that "reduction" (French for reducer)...

wouldn't it be the Total Back Pressure instead?