Труба спиральношовная (SSAW) rust removal and anticorrosion process introduction: Rust removal is an important part of the pipeline anticorrosion process. В настоящий момент, there are many rust removal methods, such as manual rust removal, sand blasting and pickling rust removal, так далее. Из их, удаление ржавчины вручную, механическое удаление ржавчины и удаление ржавчины при покраске (антикоррозийное масло для щеток) относительно распространенные методы удаления ржавчины.
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, оборудование и контейнеры, затем отшлифовать их наждачной бумагой, 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. масло для щеток антикоррозийное
Трубопроводы, 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:
а. 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;
б. Paint two coats of anti-rust paint on concealed pipelines, оборудование и контейнеры. 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. Когда подземный трубопровод используется в качестве антикоррозионного слоя, if it is constructed in winter, рекомендуется использовать масло для растворения каучука или авиационный бензин для растворения 30 А или 30 B petroleum asphalt. Два вида:
① Ручная чистка: manual brushing should be applied in layers, and each layer should be reciprocated, пересекающийся, и покрытие должно быть однородным, без пропусков или падений;
② Механическое распыление: 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. , При распылении, движение сопла должно быть равномерным, the speed should be kept at 10-18m/min, and the compressed air pressure used for spraying paint should be 0.2-0.4MPa.