Large-diameter anti-corrosion steel pipes refer to steel pipes that have been treated with anti-corrosion technology and can effectively prevent or slow down corrosion caused by chemical or electrochemical reactions during transportation and use.

Large-diameter anti-corrosion steel pipes refer to steel pipes that have been treated with anti-corrosion technology and can effectively prevent or slow down corrosion caused by chemical or electrochemical reactions during transportation and use. The main anti-corrosion processes include (1) IPN8710 anti-corrosion (mainly suitable for drinking water pipes), (2) 3PE anti-corrosion with the first layer of epoxy powder, the second layer of adhesive, and the third layer of polyethylene. Coal pitch anti-corrosion (made from epoxy resin, coal pitch, anti-rust pigments, additives, and modified amines). This product has the advantages of quick drying, good adhesion, flexibility, two-component packaging, and convenient construction acid resistant, alkali-resistant, salt-resistant, water-resistant, and oil-resistant. (3) Epoxy powder anti-corrosion (the electrostatic spraying process is used to coat epoxy powder on the surface of the steel pipe to form a film at one time. This coating has the advantages of simple coating operation, no pollution, good impact resistance, and bending resistance, and high-temperature resistance. The main standards for FBE epoxy powder anti-corrosion are SY/T0315-1997 "Technical Standard for Fused Epoxy Powder Outer Coating for Steel Pipes" and SY/T0413-2002 "Technical Standard for Outer Coating of Buried Steel Pipes Polyethylene 2PE/ 3PE anti-corrosion outer coating".

Large-diameter anti-corrosion steel pipes refer to spiral steel pipes with a diameter greater than 1m. The 1m diameter is a watershed in the production process of spiral steel pipes. First, producing spiral steel pipes with a diameter of 1m requires a larger unit. Then when the diameter exceeds 1m, especially when the wall thickness is thin, production becomes more difficult. This requires experienced technical personnel to participate in the production operation, otherwise problems such as unqualified diameter and weld quality defects will easily occur.

Large-diameter anti-corrosion steel pipes are often used in water supply and drainage pipelines. Due to long-term contact with water, it is easy to rust, so the inner and outer walls of large-diameter anti-corrosion steel pipes will be coated with corresponding anti-corrosion materials to prevent corrosion. Thus large-diameter anti-corrosion spiral steel pipes are manufactured. Large-diameter anti-corrosion spiral steel pipes not only have the characteristics of impact resistance and good plasticity of large-diameter spiral steel pipes but also have the characteristics of anti-corrosion coating that is not afraid of corrosion. The combination of the two can create a better product.