The Performance Requirements of Coating Steel Pipe

The performance requirements

Due to coating steel pipe production in the factory after going through delivery, transport, storage, and then laid in the soil or the bottom of the sea, so in addition to the corrosion protective performance, also requires a variety of physical strength.

(1) impact resistance, abrasion resistance, in order to prevent the coating from trauma caused by defect will focus from corrosion.

(2) pressure hardness. Coating film is being buried in soil, the soil pressure of compression, so the pressure hardness of paint film is very important.

(3) the insulation resistance. Resistance high can decrease the plating cost of corrosion.

(4) the cathodic disbonding resistance. If connect coating paint film defects will be centered on paint film defects of stripping phenomenon, which is referred to as a phenomenon of cathodic disbonding, its reason is due to low pipeline insulation resistance.

(5) viscosity. In various environment long time keep the viscosity of paint film.

The safety of the (6) in a different environment. In 70 ~ 80 ℃ or close to the high temperature of 100 ℃ to - 40 ~ 50 ℃ cryogenic wide temperature environment of the durability of the proposed requirements.

(7), tensile strength, elongation, resistance of paint film, at the scene of the laying of the welding parts repair, paint film itself damage is easy to repair.