Coating technology of coating of flange sealing surface

The invention discloses a coating technology of a coating of a flange sealing surface. The coating technology comprises the steps of I, carrying out sand blasting on the flange sealing surface; II, smearing the surfaces of a sealing water wave line, connecting fastening bolts and mold drawing bolts on a sealing surface of a mold with a mold release agent; III, smearing the sealing water wave line surface and the flange sealing surface with paint, enabling the middle part of the flange to form a raised peak ridge, and then scraping the paint to the flat; IV, locating the flange; V, fastening the mold and the flange together, and cleaning the overflowing paint; VI, after a coating is solidified, carrying out mold drawing; VII, detecting the flatness and profile of the water wave-shaped sealing coating of the flange sealing surface; VIII, carrying out sand blasting on the sealing surface of a matched flange; IX, smearing the surface of the flange sealing surface coating with the mold release agent; X, smearing the sealing surfaces of the flange and the matched flange with paint, and scraping the paint to be flat; XI, fastening the flange and the matched flange, controlling the thickness of the coating, and cleaning the overflowing paint; and XII, after the coating is solidified, carrying out mold drawing. According to the coating technology, pressure resistant coating protection can be carried out on the pressure bearing sealing surface, and the problem of long-acting corrosion protection is solved.