Spiral steel pipe for hydraulic engineering is an application form of spiral steel pipe. Generally, the national standard spiral steel pipe is mainly used, and the pressure is between 10-25 kg.

Spiral steel pipes for water conservancy projects are generally spiral steel pipes with relatively large diameters, because the water throughput per unit time is large, which can greatly improve work efficiency. Because the inner wall of the spiral steel pipe is constantly washed by water, the inner wall is generally not treated with anti-corrosion treatment, but the outside is generally in the form of overhead, so it is necessary to do a good job of anti-corrosion to deal with rain erosion and sun exposure, so the requirements for anti-corrosion coatings are high.

The surface of the steel pipe should be sandblasted before the anti-corrosion treatment of the spiral steel pipe used in the water conservancy project, and the grade should reach the st2.5 level. After sandblasting, apply anti-corrosion primer as soon as possible. Anti-corrosion primer is generally epoxy zinc-rich paint with a zinc content of 70% or more, the middle is epoxy micaceous iron paint, and the outermost layer is anti-oxidation and corrosion-resistant paint. Polyurethane paint.