The 2PFG has an outdoor experimental loop encompassing a vertical section with 7.8 meter long connected to a horizontal section with 24 meters long, both with 26mm ID pipe. The flow loop operates with compressed air or Nitrogen and water or oils with viscosities spanning from 1 cP to 400 cP. The pipe rack supports two lines: a transparent one made of plexiglass and the other of steel pipe. The first one operates near atmospheric pressure but allows flow visualization while the steel line operates up to 9 Barg allowing tests with heavy oils. Three 70SCFM compressors supply the compressed air. Nitrogen is supplied through compressed bottles. The water is fed to the loop by a set of centrifugal pumps while the oils are pumped by another set of progressive cavity pumps. The loop can operate over a wide range of flow rates that are continuously measured by a set of gas and liquid measurement flow devices. After measuring flow rates, temperature and pressure of each stream they are mixed at the entrance of the vertical and/or horizontal sections to generate the various two phase flow patterns: slug, bubbles, annular, stratified and churn. The experimental facility is remotely operated by a supervisory system using LabView environment. The 2PFG also has a series of benchmark loops to calibrate pressure transducers, liquid flow meters and temperature sensors. It also has available a viscosimeter, digital camera, and a two-channel hot wire anemometer. The partnership with PETROBRAS grants, in some specific projects, the use of its experimental facilities located in Atalaia (SE). Probably this experimental facility is one of a kind in the word capable to reproduce the field conditions under the controlled environment of the experimental loop.