Thick walled anti-corrosionSpiral steel pipeIt refers to steel pipelines that have undergone anti-corrosion processing, which can effectively prevent or slow down the occurrence of chemical or electrochemical reactions and corrosion during transportation and use. According to statistical data in China, the direct economic losses caused by steel pipe corrosion in the country are over 280 billion yuan per year, and currently the global annual losses due to steel pipe corrosion are as high as 500 billion US dollars. Anti corrosion spiral steel pipes can effectively prevent or slow down corrosion, extend the service life of steel pipes, and reduce the operating costs of steel pipes.

Thick walled anti-corrosion spiral steel pipes classified by manufacturing process

(1) The manufacturing process of seamless steel pipes can be divided into several basic categories: hot rolling (extrusion), cold rolling (drawing), and hot expansion steel pipes.

(2) Welded pipes can be divided into straight seam welded steel pipes, spiral welded steel pipes, plate coil butt welded steel pipes, and welded pipe hot expansion steel pipes according to manufacturing processes.

Anti corrosion spiral steel pipes classified by shape

Steel pipes can be divided into various shapes such as round pipes, square pipes, rectangular pipes, octagonal pipes, hexagonal pipes, D-shaped pipes, pentagonal pipes, complex cross-section steel pipes, double concave steel pipes, five petal plum shaped steel pipes, conical steel pipes, corrugated steel pipes, melon seed shaped steel pipes, and double convex steel pipes.

Thick walled anti-corrosion spiral steel pipes classified by purpose

Anti corrosion spiral steel pipes can be divided into: steel pipes for pipelines, steel pipes for thermal equipment, steel pipes for mechanical industry, steel pipes for petroleum and geological drilling, container steel pipes, steel pipes for chemical industry, special purpose steel pipes, etc.

2. Classification of anti-corrosion processes for inner walls

Liquid epoxy coating IPN8710 anti-corrosion

1、 Composition

Composed of aliphatic polyurethane prepolymer, epoxy resin, high-quality pigments, additives, and solvents. Specially designed for anti-corrosion of equipment, water pipelines, and surfaces of drinking water tanks that come into contact with food and drinking water.

2、 Performance

This paint is a graft type interpenetrating network polymer that triggers polymerization at room temperature. The two networks can complement each other's strengths and weaknesses, producing a synergistic effect. The coating is non-toxic, high solid, and low viscosity. It is a new type of anti-corrosion coating with strong adhesion, high strength, impact and abrasion resistance, hydrolysis resistance, corrosion resistance, water resistance, and weather resistance. It does not require high rust removal on the surface of steel structures and can be used at temperatures ranging from -20 to 120 ℃.

3、 Technical indicators:

1. Drying time: Surface drying for 30 minutes, actual drying for 6-24 hours

2. Flexibility: 1mm

3. Impact resistance: 50cm

4. Adhesion: Level 1