A process is provided for rotolining the interior surface of an oil pipe having an inner diameter of at least 2 in (5.1 cm) and no greater than 6 in (15.2 cm) and length of at least 10 ft (3 m), comprising introducing particles of rotolining composition comprising fluoropolymer and no greater than 2 wt % of metal powder into the interior of said pipe, heating the pipe to a temperature above the melting temperature of the fluoropolymer, rotating the pipe around its longitudinal axis during the heating and rocking the pipe end-to-end thereof during the rotating so as to distribute the composition over the entire interior of the pipe, the combination of heating and distributing causing the particles to melt and coalesce to form a rotolining on the pipe over its entire interior.