This experimental database aimed to obtain the pressure and slug flow properties in air-water slug flow in a lazy wave riser scaled from a real riser from the Brazilian pre-salt. The database contains the raw and processed data from pressure transducers and dual impedance probes in a fully instrumented test section with 10 measurement stations. The test grid encompasses liquid superficial velocities ranging from 0.80 to 2.00 m/s, and the gas superficial velocity varied from 0.67 to 2.40 m/s at the first station pressure condition. Six repetitions lasting 120 seconds of each pair of superficial velocities were made to ensure a representative number of elongated bubbles. The flow of three tests was recorded using a high-speed camera at six filming points along the lazy wave.