The present study investigates horizontal liquid-liquid flow through an orifice with a particular emphasis on the stratified flow regime. The initial investigations are directed at understanding the influence of the orifice plate on the phase distribution of the two liquids in the pipe. The flow patterns have been identified using the optical probe and photographic techniques. The probability density function (PDF) analysis of the random signals obtained from the optical probe has been adopted for a better understanding of the flow phenomenon. The results show the onset of dispersion in the downstream section when the flow in the upstream region exhibits stratified orientation. The use of an orifice as a homogenizer as well as a feasible flow-metering device for low viscosity oil-water flows has been encouraged by experimental results.