Common anti-corrosion processes for spiral steel pipes

Anti-corrosion spiral steel pipes play a vital role in various infrastructure and utility projects. These pipes are essentially regular spiral steel pipes that have undergone special treatment to enhance their resistance to corrosion. They are commonly used to prevent water damage, rust, acid and alkali corrosion, and oxidation.

Spiral steel pipes are often employed for transporting fluids and gases. Since these pipelines are frequently buried underground, laid underwater, or installed overhead, they are exposed to harsh environmental conditions. If proper anti-corrosion treatment is not applied, it can shorten the pipe’s lifespan and may even lead to serious consequences such as environmental pollution, fires, or explosions.

Today, nearly all spiral steel pipe projects include some form of anti-corrosion treatment to ensure durability, safety, and environmental protection. The level of corrosion resistance also affects long-term economic efficiency and maintenance costs.

Different anti-corrosion processes are selected based on the pipe’s application:

IPN8710 and epoxy coal tar coatings are commonly used for drinking water and general water pipelines. This method typically involves internal IPN8710 coating and external epoxy coal tar application, offering a simple and cost-effective solution.

3PE and TPEP anti-corrosion coatings are widely used for gas and tap water pipelines. These methods provide high-performance protection with automated processing, though they come at a higher cost.

Plastic-coated steel pipes are currently among the most popular anti-corrosion options, used extensively in water supply, drainage, firefighting systems, and mining. This mature technology offers strong corrosion resistance, excellent mechanical performance, low maintenance, and long service life. As a result, it’s increasingly favored by engineering designers.

Additionally, some spiral steel pipes are coated with semi-solid thermal spray plastic—often epoxy resin or flame-retardant polyurethane—and then heat-treated to form a protective layer with strong oxidation and wear resistance. These pipes are easy to construct and maintain, making them widely used across the country.

When selecting an anti-corrosion method for spiral steel pipes, it’s important to consider the specific application, construction environment, and budget. On-site conditions, especially dryness and cleanliness, are also key to ensuring effective installation and long-term performance.