Oil separator code of construction ASME VIII

An oil/gas separator is a pressure vessel used for separating a good stream into gaseous and liquid components. They are installed either in an onshore processing station or on an offshore platform. Based on the vessel configurations, the oil/gas separators can be divided into horizontal, vertical, or spherical separators. In teams of fluids to be separated, the oil/gas separators can be grouped into gas/liquid two-phase separator or oil/gas/water three-phase separator. Based on separation function, the oil/gas separators can also classified into the primary phase separator, test separator, high-pressure separator, low-pressure separator, liquidizer, degasser, etc. To meet process requirements, the oil/gas separators are normally designed in stages, in which the first stage separator is used for preliminary phase separation, while the second and third stage separator is applied for further treatment of each individual phase (gas, oil, and water). Depending on a specific application, oil/gas separators are also called liquidizer or degasser. The liquidizers are used to remove dispersed droplets from a bulk gas stream; while the degassers are designed to remove contaminated gas bubbles from the bulk liquid stream.