The Structure Of Gravity Flow Lines

818 Words Sep 14th, 2016 4 Pages
PIPING DESIGNFOR GRAVITY FLOW LINES

V Sunil Sagar, Shitij Mahajan, Saurav Tripathy
MineralsTeam,Weir -Ensci
(Category-NewProductDesign)

Abstract— Gravity flow is the most common form of flow through pipes. Practical applications of gravity flow pipelines are numerous ranging from overhead tanks, water distribution systems, sanitary lines etc.
When it comes to minerals processing the applications are wide ranging, for instance sumps/tanks connected to pumps, cyclone distributor underflow, tether/dilution water etc. The design of gravity flow lines appears to be simple but in reality it is quite complex considering the various factors affecting the flow.
As it is a two phase flow possibility of slug flow due toWater lock, air locks and siphons is very high. There are several flow patterns that are possible due the effect of gravity, which tends to separate the phases and creates stratification. Very often severe problems can occur of slug flow is present in a pipeline. Slug flow can be avoided in piping by the following approach


Reducing line sizes to the minimum permitted by available pressure differentials to achieve a safe mass flow rate

Designing for parallel pipe runs that will permit increasing mass flux per pipe at low load conditions by removing one pipe from service •
Arranging the pipe configurations to protect against slug flow (for example, in a pocketed line where liquid might collect and slug flow can develop). Slug flow…
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