Tube soudé en spirale (SSAW) rust removal and anticorrosion process introduction: Rust removal is an important part of the pipeline anticorrosion process. Maintenant, there are many rust removal methods, such as manual rust removal, sand blasting and pickling rust removal, etc. Parmi eux, dérouillage manuel, dérouillage mécanique et dérouillage peinture (huile de brossage anti-corrosion) sont des méthodes d'élimination de la rouille relativement courantes.
1. Manual derusting
Remove the scale and casting sand on the surface of pipes, equipment and containers with a scraper and file, and then use a wire brush to remove floating rust on the surface of pipes, équipements et conteneurs, puis polissez-les avec du papier de verre, and finally wipe them with cotton silk.
2. Mechanical rust removal
First use a scraper or a file to remove the scale and casting sand on the surface of the pipe; then one person is in front of the descaling machine and the other is behind the descaling machine, and the pipe is repeatedly descaled in the descaling machine until the true color of the metal is exposed; Before oiling, wipe it again with cotton silk to remove floating ash on the surface.
3. Huile de brosse anti-corrosion
Pipelines, equipment and container valves are generally anti-corrosion and oiled according to the design requirements. When there is no design requirement, the following regulations should be followed:
une. Surface-mounted pipelines, equipment and containers must first be painted with one coat of anti-rust paint, and then two coats of top coats should be painted before handover. If there are requirements for heat preservation and anti-condensation, two coats of anti-rust paint should be painted;
b. Paint two coats of anti-rust paint on concealed pipelines, équipements et conteneurs. The second coat of anti-rust paint must be painted after the first coat is completely dry, and the consistency of the anti-rust paint must be appropriate;
3. Lorsque le pipeline enterré est utilisé comme couche anti-corrosion, if it is constructed in winter, il est conseillé d'utiliser de l'huile de solvant pour caoutchouc ou de l'essence d'aviation pour dissoudre 30 Un ou 30 B petroleum asphalt. Deux types:
① Brossage manuel: manual brushing should be applied in layers, and each layer should be reciprocated, entrecroisé, et le revêtement doit être maintenu uniforme sans manquer ni tomber;
② Pulvérisation mécanique: The sprayed paint flow should be perpendicular to the painted surface during spraying. When the painted surface is flat, the distance between the nozzle and the painted surface should be 250-350mm. If the painted surface is an arc surface, the distance between the nozzle and the painted surface should be about 400mm. , Lors de la pulvérisation, le mouvement de la buse doit être uniforme, the speed should be kept at 10-18m/min, and the compressed air pressure used for spraying paint should be 0.2-0.4MPa.