Concrete steps for cleaning plastic steel pipe
At this stage, there are many types of coated steel pipes, whether in the fire industry or in the construction industry, there is his figure, then there is no cleaning of coated steel pipes is not very clear
Cleaning steps are very important, can improve the service life of the coated steel pipe, so we have to clean the coated steel pipe correctly, next, let's take a look at the cleaning steps of the coated steel pipe are specific aspects
Plastic coated steel pipe cleaning steps
The cleaning steps of the coated steel pipe are embodied in several aspects, the key is to use organic solvents and emulsions to clean the skin of the steel pipe to remove oil, grease, dust, polishing agents and similar organic compounds, but it can not remove the rust, oxide, welding powder, etc., so it is only used as a matching trick in the anti-corrosion processing
It is mainly the application of steel wire ball and other tools to polish the skin of the steel pipe, which can remove loose or arch oxide, rust, welding slag and so on.
The rust removal by hand tools can reach Sa2 level, and the rust removal by tools can reach Sa3 level. If the skin of the steel pipe adheres firmly to the oxide scale, the rust removal conclusion of the tool is not ideal, and the anchor grain depth specified in the anti-corrosion construction can not be reached.
Pickling process: chemical and electrolytic methods are generally used to clean the pickling process, and the corrosion protection of steel pipes only uses chemical pickling process, which can remove the oxide, rust and old coating
Sometimes it can be used as a re-cleaning after sandblasting rust, chemical cleaning can make the skin reach a certain degree of cleanliness and roughness, but its anchor pattern is shallow, and easy to pollute the situation.
Coated steel pipe price market
The market price continues to fall. At present, it is difficult to have positive support on the policy side, and the pattern of relatively weak end demand continues. Coupled with the expectation that the Federal Reserve will raise interest rates, it continues to ferment, and the decline in its futures is difficult to stop.
Although the steel billet prices rebounded after the fall last weekend, the coated steel pipe market is still dominated by negative traders, spot quotes follow the futures down, the downstream industry to enter the market procurement caution, coupled with the lack of confidence in the future market, the internal and external coated steel pipe market trading atmosphere is general.
Stocks of coated steel tube traders mostly remained at low levels, and the overall market continued to trade cautiously. Due to the high level of raw materials, but the finished materials continue to decline, most of the long-term losses of steel mills intensified, the maintenance of blast furnaces in Tangshan area increased, and the output of some steel mills also declined.
