Experimental studies have been performed in a 10.16 cm diameter, 36 m long, multiphase flow loop to examine the flow regime maps in _+2 °, _+15 ° and _+30 ° inclinations. Superficial oil velocities between 0.2 and 2.0 m/s and superficial gas velocities between 1 and 14 m/s were investigated. Oil with a viscosity of 2.5 cP was used for the study. Carbon dioxide was used for the gas phase. Temperature and pressure were maintained at 25 °C and 0.13 MPa. It was observed that the dominant regime for upward inclinations was slug flow. No stratified flow was observed for these conditions. As the angle of upward inclination increases from 2 ° to 15 ° , the transition from plug to slug flow occurs at higher superficial gas velocities. However, the transition from slug to annular flow occurred at lower superficial gas velocities. As the angle of downward inclination increases, the transition from stratified to slug flow occurs at higher liquid and gas flow rates. A considerable area of the flow regime map was found to be occupied by stratified flow with increasing downward inclination. The transition from slug to annular flow occurred at slightly higher gas flow rates when inclination was changed from-2 ° to -15 ° . However, little difference was found during the transition from slug to annular flow when the inclination was changed from-15 ° to -30 °.