Biphasic flow pipeline û B3!.4 or B31.8?
Biphasic flow pipeline û B3!.4 or B31.8?
(OP)
For designing a 16”, carbon steel pipeline, for diluted crude oil transportation, we have found that flow is approximately 50% liquid and 50% gas. We have read both the scopes for ASME B31.4 and B31.8, but we are doubtful about the applicable standard for this case.
We would appreciate very much your opinion about this case.
We would appreciate very much your opinion about this case.





RE: Biphasic flow pipeline û B3!.4 or B31.8?
"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek
RE: Biphasic flow pipeline û B3!.4 or B31.8?
"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek
RE: Biphasic flow pipeline û B3!.4 or B31.8?
I tend to draw then line at whether there is more than about 30% of the mass in the line in the gaseous state (which would work out to over 80% gas by volume depending on pressure) then I'm going to prefer a gas standard. Less than 5% gas by mass I'm going to be looking at a liquid standard. In between I'm going to be looking really hard at the kinds of equipment that are going to get installed (a mechanical separator would push me towards 31.8, a heater-treater would push me the other way)
David Simpson, PE
MuleShoe Engineering
"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.