Steam at 2.0MPa and 350 deg C, flowing at a rate of 2kg/s is throttled to a pressure of 800kPa and is then mixed with the steam of 800kPa and 0.95 dry, which flows at a rate of 4kg/s. Find the diameter of a pipe to convey the superheated steam flowing into the mixing process if the speed of the steam is 20m/s and also ascertain the condition of the resulting mixture.