API Spec 12J. Specification for Oil and Gas Separators, Eighth Edition. standard by American Petroleum Institute, 10/01/ View all product details. Find the most up-to-date version of API SPEC 12J at Engineering Organization: API. Publication Date: 1 October Status: active. Page Count: The API 12J  recommends ranges of KS –values for vertical and horizontal gas -liquid separators. Per API 12J, “the maximum allowable superficial velocity, calculated form the above factors, is .. October, 8. PF
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API 12J Spec for Oil and Gas Separators – PDF Free Download
References  provide the details on the droplet settling theory methods which can be used to more accurately quantify separator performance.
This specification covers minimum requirements for the design, fabrication, and plant testing of oil and gas separators and oil-gas-water separators that are used in the production of oil and gas, and are located at some point on the producing flow line between the wellhead and pipeline. Sizing of the horizontal separators are more complicated. For horizontal separators, the sizing depends on in addition to the droplet size, density of gas and liquid phases, and gas velocity separator effective length, L eand the depth available for gas flow, h Gi.
These parameters are approximate only.
Each segment was fitted to a linear equation in the form of Equation 7 and its regressed coefficients e and f are presented in Tables 3A and 3B for FPS and SI units, respectively. Monitoring Standards monitoring is a free service designed for you who wish to be alerted of changes to or new editions of the standards required in your work.
These values are presented in Table 1.
We will consider both vertical and horizontal gas-liquid separators. Mesh pads K S and performance parameters [3, xpi, 8] Notes: Want more content like this? Please 122j that extra delivery cost and delivery time may apply for products ordered as hardcopy, as the products must first be shipped from our suppliers overseas. The two curves for micron droplet size in Figure 2 were divided into 4 and 2 segments based on pressure range for the lower and upper curves, respectively.
In the following sections, we will discuss three sources. If you need to be able to add standards to the monitoring service, you must register as a user with your own username and password.
Sign up for email updates! For scrubber applications with low liquid loadings, the K S —values will be primarily dependent on the mist extractor type, and the gas gravity separation section becomes less important. Figure 4 shows the location and function of a typical mist extractor in a vertical separator. Therefore, the maximum gas velocity which prevents apl of liquid is obtained. References  provide mesh pad examples.
The curves for different droplet sizes shown in Figure 2 apk fitted to a 3 rd order polynomial for droplet sizes of, and qpi.
API Spec 12J
This product can only be purchased electronically by customers who have a web subscription agreement. Historically the Souders-Brown equation has been employed as it can provide reasonable results and is easy to use, but has qpi in terms of quantifying separator performance. For more information about these services, visit our website at http: Equation 2 is called Souders-Brown  equation and K S is referred to as the design or sizing parameter.
In the case of demisting cyclones, the vendor should be consulted in regards to performance for the current operations of interest. The volume of spherical droplet, V Dis calculated by.
Table 5 was originally developed for mesh pads, but is used as an approximation for other mist extractor types. If we consider a spherical liquid droplet with a diameter of, D Pin the gas phase two forces as shown in Figure 1 act on it. Once the maximum gas velocity, V Gmaxthrough the vessel is determined by Equation 2, one can calculate the minimum vessel diameter, D min by Equation 3. The vane-pack manufacturer should be contacted for specific information.
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In the December tip of the month TOTM , we discussed troubleshooting of gas-liquid separators for removal of liquids from the gas stream leaving the separator. Separators outside the scope of this specification include centrifugal separators, filter separators and desanding separators.
For the higher liquid load applications, i.
Specification for Oil and Gas Separators, 8th Edition:
Mesh pad K S deration factors as a function of pressure . Mesh pads are the most common type of mist extractors used in vertical separator applications. Note for each droplet size a range of K S —values are given for a specified pressure. Standards monitoring is a free 20008 designed for you who wish to be alerted of changes to or new editions of the standards required in your work.
This dependency of K S on pressure apo droplet size is presented in Figure 2 . This qpi typically characterized by a K S —value, as shown in Equation 2. Similarly, the terminal velocity for the other flow regimes like Intermediate and Newton can be derived based on their corresponding expressions for the drag coefficients . Substitution of Equations 3 and 4 into Equation 1 and solving for the gas maximum velocity.
Most mist extractors have limitations on the amount of entrained liquid droplets that can be efficiently removed from the gas, thus the importance of the gas gravity section to apj the liquids to aapi acceptable level upstream of the mist extractor. Equation 6 is called Souder-Brown equation and K S is referred to as the design parameter. The drag force, F Dis exerted by flow of gas and gravity force, F Gis exerted by the weight of droplet.