API 12J 2008 PDF

Feran We will consider both vertical and horizontal gas-liquid separators. K S as a function of pressure and liquid droplet size for vertical separators with no mist extractor devices [5]. The mist extractor is the final gas cleaning device in a conventional separator. API Spec 12J The design parameter, K Sin the Souders-Brown equation is an empirical parameter and is a key factor for the sizing the gas-liquid separators vessel diameter as well as for determination of the mist extractor diameter.

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Grokree You need to log in before adding standards to the monitoring service. K S as a function of pressure and liquid droplet size for vertical separators with no mist extractor devices [5]. The Design Parameter, K S. 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.

Mesh pad K S deration factors as a function of pressure [5]. The benefits of a subscription: 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. In the following sections, we will discuss three sources. Pressure vessels covered by this specification are normally classified as natural resource vessels. References [] provide the details on the droplet settling theory methods which can be used to more accurately quantify separator performance.

The mist extractor is the final gas cleaning device in a conventional separator. Sizing of the horizontal separators are more complicated. Equation 6 is called Souder-Brown equation and K S is referred to as the design parameter. Once the maximum, V Gmaxgas velocity through the vessel is determined by Equation 6, one can calculate the required minimum cross sectional area of vessel for gas flow by the following equation.

The drag force, F Dis exerted by flow of gas and gravity force, F Gis exerted by the weight of droplet. Historically the Souders-Brown equation has been employed as it can provide reasonable results and is easy to use, but has shortcomings in terms of quantifying separator performance.

The effective length and actual lengths are calculated by Equation 5. The drag force acts to entrain the liquid droplet while the gravity force acts to j it down and separating it from the gas phase. For the higher liquid load applications, i. For practical applications, the first term on the right hand side is replaced by K S.

There are two methods for sizing gas-liquid separators: Assume mesh pad K S — value decline with pressure as shown in Table 5. The drag force, F Dis exerted by flow of gas and gravity force, F Gis exerted by weight of droplet. In the case of demisting cyclones, the vendor should be consulted in regards to performance for the current operations of interest. Gas-Liquid Separators Sizing Parameter If we consider a spherical liquid droplet with a diameter of D P in the gas phase two forces as shown in Figure 1 act on it.

Table 5 was originally developed for mesh pads, but is used as an approximation for other mist extractor types. References [] provide mesh pad examples. This is typically characterized by a K S —value, 12u shown in Equation 2. For detail of calculations procedure refer to chapter 11 of reference [5].

Specification for Oil and Gas Separators, 8th Edition: Knowing the actual gas flow rate aoi the vessel, one can use K S parameter to determine the maximum allowable gas velocity through the vessel and determine the required separator diameter. Separators outside the scope of this specification include centrifugal separators, filter separators and desanding separators.

Most importantly — mist extractor type and design e. The vane bend angles force the gas to change direction while the higher density liquid droplets tend to travel in a straight-line path, and impact the surface of the vane where they are collected and removed from the gas flow.

We will consider both vertical and horizontal gas-liquid separators. For vertical separators with no mist extractor devices, Chap 11, Vol 2 of the Gas Conditioning and Processing book presents K S as a function of pressure and liquid droplet size [5]. Related Articles.

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API SPEC 12J

Yozshutaxe Note for each droplet size a range of K S —values are given for a specified pressure. 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. The primary separation mechanism is liquid impingement onto the wires, followed by coalescence into droplets large enough to disengage from the mesh pad. 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 remove the liquids to an acceptable level upstream of the mist extractor. The benefits of a subscription: These parameters are approximate only.

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Arashit In a future TOTM we will discuss the droplet settling theory methods which can be used to more accurately quantify separator performance. Droplet settling theory method, 2. Separators outside the scope of this specification include centrifugal separators, filter separators and desanding separators. The selection, and design to a large degree, determine the amount of liquid carryover remaining in the gas phase. The Design Parameter, K S. Historically the Souders-Brown equation has been employed as it can provide reasonable results and is easy to use, but has shortcomings in terms of quantifying separator performance.

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API 12J 2008 PDF

For vertical separators with no mist extractor devices, Chap 11, Vol 2 of the Gas Conditioning Processing book presents K S as a function of pressure and liquid droplet size [5]. 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. API Spec 12J : The curves for different droplet sizes shown in Figure 2 are fitted to a 3 rd order polynomial for droplet sizes of, and microns. 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. This is typically characterized by a K S —value, as shown in Equation 2. K S as a function of pressure and liquid droplet size for vertical separators with no mist extractor devices [5]. This is particularly important for separators handling higher liquid loads.

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Fenricage This is typically characterized by a K S —value, as shown in Equation 2. Historically the Souders-Brown equation has been employed as it can provide reasonable results and is easy to use, but has shortcomings in terms of quantifying separator performance. This product can only be purchased electronically by customers who have a web subscription agreement. The benefits of a subscription: Equation 6 is called Souder-Brown equation and K S is referred to as the design parameter.

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