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Anticorrosion Technology of Large Diameter Spiral Steel Pipes
Apr 26, 2022
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The anti-corrosion of spiral steel pipes refers to the steel pipe which can effectively prevent or slow down the corrosion phenomenon of chemical or electrochemical reaction in the process of transportation and use. According to China's statistics, the direct economic loss of the corrosion of steel pipes in China is more than 280 billion dollars per year. The current global annual loss is as high as 500 billion dollars due to the corrosion of steel pipes. Anti-corrosion steel pipes can effectively prevent or slow down the corrosion to prolong the service life of steel pipes and reduce the operation cost of steel pipes.
A. Classifications
1. Classifications by the manufacturing process
(1) the manufacturing process of seamless steel pipes can be divided into the following types: hot rolling (extrusion) seamless steel pipes, cold rolling (drawing) seamless steel pipes and hot expanding seamless steel pipes.
(2) According to the manufacturing process, welded pipes can be divided into the types as follows: straight seam welded steel pipes, spiral welded steel pipes, plate butt welded steel pipes and welded thermal expansion steel pipes.0
2. Classifications by the shape
According to the shape of steel pipes, it can be divided into: round pipes, square pipes, rectangular pipes, octagonal pipes, hexagonal pipes, D shape pipes, pentagonal shaped steel pipes, complex section steel pipes, double concave steel pipes, five petals of plum shaped steel pipes, conical steel pipes, corrugated steel pipes, melon shaped steel pipes, double convex steel pipes and so on.
3. Classifications by anti-corrosion process for inner wall of spiral steel pipes
Liquid epoxy coating IPN8710
B. Composition
It is composed of aliphatic polyurethane prepolymer and epoxy resin, high quality pigments, additives and solvents. It is specially used in the corrosion of food, drinking water and other contact equipment, water transmission and distribution pipelines and the surface of drinking water tanks.
C. Performance
The paint is a grafting interpenetrating polymer network. It polymerizes at room temperature. These networks can complement each other. They each have a collaborative effect. The coating is non-toxic. The viscosity is low. It is a kind of new type of anticorrosive coating with strong adhesion, high strength, impact resistance, hydrolysis resistance, corrosion resistance, water resistance and weather resistance. It is a new type of anti-corrosive coating. The request for the rust removal of the paint on the surface of steel structure is not high. The operating temperature can be in the range of -20 ~ 120℃.
D. Technical Indicators:
1. Drying time: surface: 30min, whole: 6-24h
2. Flexibility: 1mm
3. Impact resistance: 50cm
4. Adhesion: level 1
A. Classifications
1. Classifications by the manufacturing process
(1) the manufacturing process of seamless steel pipes can be divided into the following types: hot rolling (extrusion) seamless steel pipes, cold rolling (drawing) seamless steel pipes and hot expanding seamless steel pipes.
(2) According to the manufacturing process, welded pipes can be divided into the types as follows: straight seam welded steel pipes, spiral welded steel pipes, plate butt welded steel pipes and welded thermal expansion steel pipes.0
2. Classifications by the shape
According to the shape of steel pipes, it can be divided into: round pipes, square pipes, rectangular pipes, octagonal pipes, hexagonal pipes, D shape pipes, pentagonal shaped steel pipes, complex section steel pipes, double concave steel pipes, five petals of plum shaped steel pipes, conical steel pipes, corrugated steel pipes, melon shaped steel pipes, double convex steel pipes and so on.
3. Classifications by anti-corrosion process for inner wall of spiral steel pipes
Liquid epoxy coating IPN8710
B. Composition
It is composed of aliphatic polyurethane prepolymer and epoxy resin, high quality pigments, additives and solvents. It is specially used in the corrosion of food, drinking water and other contact equipment, water transmission and distribution pipelines and the surface of drinking water tanks.
C. Performance
The paint is a grafting interpenetrating polymer network. It polymerizes at room temperature. These networks can complement each other. They each have a collaborative effect. The coating is non-toxic. The viscosity is low. It is a kind of new type of anticorrosive coating with strong adhesion, high strength, impact resistance, hydrolysis resistance, corrosion resistance, water resistance and weather resistance. It is a new type of anti-corrosive coating. The request for the rust removal of the paint on the surface of steel structure is not high. The operating temperature can be in the range of -20 ~ 120℃.
D. Technical Indicators:
1. Drying time: surface: 30min, whole: 6-24h
2. Flexibility: 1mm
3. Impact resistance: 50cm
4. Adhesion: level 1
