IPN8710 anticorrosive SSAW steel pipe

The 8710 anticorrosive spiral pipe, commonly known as IPN8710 anticorrosion, is a specialized steel pipe with an inner coating of liquid epoxy designed to protect it from corrosion. This coating is made from a blend of polyurethane prepolymer, epoxy resin, and other compounds. It is primarily used in the transportation of drinking water and food products, offering superior protection against corrosion, hydrolysis, and various environmental factors.

Properties of 8710 Anticorrosive Coating

The 8710 coating is highly effective in environments exposed to various corrosive agents, including acids, alkalines, salts, oxidizing agents, and water vapor. To ensure optimal performance in these conditions, the coating must meet several key requirements:

Chemical Inertness: It should remain stable when exposed to acids, alkalis, and salts.

Dense Structure: The coating must have a compact, tight molecular structure that prevents corrosion.

Waterproofing: Good resistance to water penetration.

Adhesion: Strong bonding to the steel pipe for long-term protection.

Toughness: The coating must be flexible enough to withstand physical stresses.

Types of IPN8710 Anticorrosive Coatings

- IPN8710-1:

Composed of polyurethane polyethylene, modified epoxy resin, non-toxic anti-corrosion pigments, and fillers.

Cures at room temperature to form a dense interpenetrating network.

Offers excellent resistance to acid, alkali, salt, and other corrosive agents.

Strong adhesion properties ensure long-lasting protection.

- IPN8710-2A:

Made from epoxy resin modified with rubber, non-toxic anti-rust pigments, and fillers.

Provides exceptional chemical resistance, is non-toxic, and protects against microbial corrosion.

The 8710 anticorrosive spiral pipe should be stored in a cool, dry place, away from direct sunlight, to preserve the integrity of the coating. The typical shelf life is one year, after which testing should be conducted before use to ensure continued effectiveness.

Anticorrosion of the Outer Wall of SSAW Steel Pipes

While 8710 anticorrosive coating primarily protects the inner wall of spiral steel pipes, several anticorrosion methods are also used for the outer wall:

- 3PE Anti-Corrosion:

This method involves fusing epoxy powder, adhesive, and polyethylene to the outer surface of the pipe, creating a protective layer known as 3PE anti-corrosion. It provides a robust barrier against corrosion, enhancing the lifespan of the steel pipe.

- Epoxy Coal Tar Anti-Corrosion:

Composed of epoxy resin, coal tar pitch, and anti-rust pigments, this coating is known for its fast drying speed and strong adhesion. It has become a popular choice for steel pipe protection, especially for offshore and marine environments due to its durability.

- Anticorrosive Jacket:

The outer surface of the pipe can be coated with a polyethylene jacket, which acts as an additional protective layer. This coating shields the pipe from external damage, prevents further corrosion, and helps maintain the integrity of the anticorrosive coating.

Conclusion

The 8710 anticorrosive spiral pipe is essential for ensuring the long-term performance and safety of steel pipes, particularly in critical applications like water and food transportation. By combining advanced coatings like IPN8710 for internal protection and 3PE or coal tar epoxy for external protection, these pipes offer robust, reliable solutions for a wide range of industries.