API Spec 12J-2009 pdf download.Specification for Oil and Gas Separators.
1 Scope 1.1 General This specification covers minimum requirements for the design, fabrication, and shop testing of oil-field type oil and gas separators and/or oil-gas-water separators used in the production of oil and/or gas, and usually located but not limited to some point on the producing flowline between the wellhead and pipeline. Separators covered by this specification may be vertical, spherical, or single or double barrel horizontal. Unless otherwise agreed upon between the purchaser and the manufacturer, the jurisdiction of this specification terminates with the pressure vessel as defined in the Scope of Section VIII, Division 1 of the ASME Boiler and Pressure Vessel Code, hereinafter referred to as the ASME Code. Pressure vessels covered by this specification are normally classified as natural resource vessels by API 510, Pressure Vessel Inspection Code. Separators outside the scope of this specification include centrifugal separators, filter separators, and de-sanding separators. 1.2 Compliance Any manufacturer producing equipment or materials represented as conforming with an API specification is responsible for complying with all the provisions of that specification. API does not represent, warrant or guarantee that such products do in fact conform to the applicable API standard or specification. 2 Definitions The separation of gas and liquids primarily relies on physical differences in the phases. This section covers mechanical separation of liquids and gases. A separator vessel may be referred to as a knockout, trap, scrubber, flash chamber, or expansion vessel as well as the original term. This terminology is applied regardless of shape. Generally, the following definitions are regarded as basic. 2.1 corrosion The destruction of a metal by chemical or electrochemical reaction with its environment (see Annex B).
2.5 scrubber A type of separator which has been designed to handle flow streams with unusually high gas-to-liquid ratios, commonly used in conjunction with dehydrators, extraction plants, instruments, or compressors for protection from entrained liquids. 2.6 separator A vessel used in the field to remove wellstream liquid(s) from gas components that may be either two-phase which remove the total liquid from the gas or three-phase which also remove free water from the hydrocarbon liquid. 2.7 total liquid knockout A type of separator vessel used to remove the combined liquids from a gas stream. 3 Material 3.1 ASME Code Separators furnished to this specification shall conform to the material requirements stipulated in the latest edition of the ASME Code. 3.2 Selection Material selection for corrosive fluids should be selected based on a review of related API or NACE publications for materials that conform to 3.1. Consideration should be given to material selection as it relates to weight loss, sulphide stress cracking, chloride stress cracking, or other forms of corrosion. It is the responsibility of the user to determine what consideration for corrosion should be made to the vessel during its intended life (reference ASME Code, as applicable to corrosion). Corrosion guidelines are given in Annex B. 3.3 Corrosion Consideration Corrosion consideration for separators furnished to this specification shall be for the pressure containing parts of the vessel only, and as can be identified as falling within the requirements of the applicable sections of the ASME Code. Corrosion considerations for vessel internals (non-pressure parts) is by mutual agreement between the purchaser and the manufacturer and not a part of this specification. 4 Design 4.1 Type, Size, Pressure and Temperature Ratings Separators furnished to this specification may be vertical, horizontal, or spherical, and are available in sizes and MAWP ratings shown in Table 1, Table 2, and Table 3.