First, the pretreatment requirements of plastic coated steel pipes
Plastic coated composite steel pipes usually refer to double-sided plastic coating, also known as internal and external plastic coated pipes. For composite steel pipes, the early rust removal technology plays a vital role in the quality of finished pipes. Therefore, the newly-introduced steel pipes do not need to be galvanized, but the rust must be removed, and a small amount of rust spots in the pipe must also be removed. And it is necessary to eliminate the presence or absence. Reach the requirements of St2 rust removal or Sa1 electric rust removal. Remove the oil stains on the surface of the steel pipe, and we can use acetone to clean the surface.
Second, how to distinguish the quality of epoxy resin coated steel pipes
The real epoxy resin coated steel pipe is the anti-corrosion structure of the pipeline. It uses electrostatic adsorption to electrostatically adsorb the modified epoxy resin powder on the inner and outer walls of the steel pipe. Companies that can usually say the same name are deceiving customers. The product performance of the plastic coated composite steel pipe has been recognized by the majority of customers, and customers can distinguish in time to prevent being deceived after cooperation, smoothness, and other characteristics. The so-called cold-sprayed plastic composite steel pipe has appeared on the market. Recently, when we are doing customer follow-up visits, we often find a very serious problem, that is, odorless paint is sprayed based on ordinary steel pipes to consolidate the surface, and then the powder is physically reacted at a high temperature to adhere to the inner and outer walls of the steel pipe, which is called epoxy resin, to prevent being deceived.
Post time: Dec-18-2024