Dear Deven, API 421 is a ...
Dear Deven,
API 421 is a well balanced and proven design tool. Granted it has limitations, but the deviations could be reasoned on basis of the Stoke's law.
API separators initially were designed on basis of and for refinery waters.
There are many other waters where the "ideal" OWS separator may be based on other principles of physics. I do not believe there is one single apparatus for all applications and it is the responsibility of the specifications writer to define the boundaries and objectives, not necessarily just calling on an API OWS.
2 Comments
most of the mechanical separation system based on Stokes law, including hydrocyclone technology which takes only 1/10th of the space compare to API and works on single PD Pump and can separate oil droplet of up to 15 micron compare to API design which only separate more than 150 micron.
Published by deven g, Wyuna Separation Technology - Admin
very true and that is exactly what I wanted to point out, most of the projects I have seen only API OWS. Copy Paste of old specification for OWS specs wont help with stringent environment discharge specs.
Just an addition of one line " similar efficient equipment/technologies which can provide required discharge specs can also participate for design and quote"
Published by deven g, Wyuna Separation Technology - Admin