Api Oil Water Separator Sizing

33 1 2 types of separator api tanks see figure 33 1 and plate separators are the more efficient oil separators.

Api oil water separator sizing.

Sizing ows calculation per api 421 xls author. 0 9860 density of the water s g g cm3 0 0052 viscosity in poise 1 2568 rise rate of oil droplet gpm ft2 calculated 159 13 horizontal surface area area ft2 of the separator needed to achieve desired oil removal performance 0 89 cross sectional velocity ft min. Oil water separators are typically the american petroleum institute api also called baffle type american petroleum institute 1990 or the coalescing plate cp type using a gravity mechanism for separation. Oil droplets from 20 to 150 microns in diameter.

Must be 3fpm note. 8 16 2016 5 28 46 pm. An api oil water separator is a device designed to separate gross amounts of oil and suspended solids from the wastewater effluents of oil refineries petrochemical plants chemical plants natural gas processing plants and other industrial oily water sources. Oil water separator oil droplet sizes definitions and meanings.

Forebay separator section and the. See figure 5 33 and figure 5 34. This guide is intended to assist knowledgeable personnel with sizing a highland tank oil water separator. Individual projects must be evaluated to determine the appropriate size and configuration for that site.

Following are the definitions and categories of different oil droplet sizes as defined by the american petroleum institute in the mid 1970 s. Below is a link to an api oil water separator sizing spreadsheet developed by hydro flo technologies. By inputting the major design criteria you can solve for the separation chambers width to length to depth ratios. The spreadsheet operates on microsoft excel 2003 or later.

The information contained herein is the opinion of highland tank. This design also known as an api separator generally provides a discharge oil concentration of 100 ppm based on a 150 micron droplet size. The name is derived from the fact that such separators are designed according to standards published by the american petroleum. The api type design relies on a large water volume.

Oil droplets 150 microns in diameter and larger. Oil water separator sizing calculation. This calculation is based on the methods proposed. This correlates to a tank size that can be 5 times the size of an equally sized coalescing separator.

The api type design relies on a large water volume. Oil water separators typically consist of three bays. When sizing an ows there are three primary factors to consider. This design also known as an api separator generally provides a discharge oil concentration of 100 ppm based on a 150 micron droplet size.