Flow efficiency coatings (FEC) are thin film epoxy coatings applied in natural gas pipelines to smooth the internal pipe surface for improved flow. Application of FEC replaces the internal rough surface of a steel pipe with a smooth surface finish which reduces friction and turbulence to increase flow efficiency. This may allow for use of a smaller diameter pipe or lower compression requirements resulting in reduced capital and operating costs. After application of FEC, the clean internal surface of the pipe provides corrosion protection prior to installation and allows for easier visual inspection. The cleaner surface reduces the cost and effort of drying the pipe after hydrostatic testing.