How to deal with the internal anti-corrosion of double flange limit electric ball valve The double flange limit electric ball valve can reduce the corrosion of the medium on the pipeline, improve the smoothness of the inner wall of the pipeline, reduce resistance, and improve the transmission capacity. Amine cured epoxy resin paint and polyamide cured epoxy resin are generally used for internal corrosion prevention of pipes. A protective film is formed inside the pipe wall to prevent the medium from corroding the steel pipe.
The anti-corrosion construction process in the pipeline is: derusting ----- dedusting ----- drying ----- painting ----- curing. When the inner diameter of the pipeline is greater than 600mm, manual sand blasting can be used to remove rust. After the rust is removed, compressed air is used to purge, remove dust, dry, and manually brush or spray anti-corrosion primer or finish paint. After curing, the pipeline can be assembled and welded on the site. However, the welded junction of the assembly and welding cannot be internally protected. Handholes can be opened at the top of the steel pipe in some places. After the welding slag is cleaned, another layer of anti-corrosion paint can be brushed. For steel pipes with a diameter of 500 mm, it is impossible to enter the derusting, brushing and oil injector by manual anti-corrosion. A new design has a derusting trolley and spraying trolley, which can spray paint inside the steel pipe.