Hot-dip coated steel pipe Processing technology and applicable regulations

　　Applicable standards for hot-dip galvanized steel pipes with embedded reinforcing bars

　　1. Pre‑embedded hot‑dip galvanized steel pipes with internal reinforcement offer reliable installation and can withstand pressures up to 2 MPa, making them particularly suitable for vertical water supply and drainage risers as well as for water supply and drainage systems in mid‑rise and high‑rise buildings.

　　2. The embedded‑reinforcement, hot‑dip‑coated steel pipes are available in two major product lines—cold‑water and hot‑water—and come in 14 standard sizes ranging from DN15 to DN250, fully meeting the water‑supply requirements of high-, mid-, and low‑rise building projects.

　　3. The surface of the embedded hot-dip galvanized steel pipe with internal reinforcement is coated with a two-layer anti-corrosion system, making it suitable for both exposed installation and underground burial.

　　4. Quick‑connect ring‑type fittings compatible with internally reinforced, hot‑dip‑coated steel pipes of various specifications and models—high quality at an affordable price—ensure both secure pipeline connections and seamless integration with other piping systems and a wide range of water supply and drainage equipment.

　　5. Cold-water‑type internally reinforced pre‑embedded hot‑dip plastic‑coated steel pipes are suitable for applications with operating temperatures below 55°C, while hot‑water‑type internally ribbed, internally embedded hot‑dip plastic‑coated steel pipes are appropriate for environments with operating temperatures up to 95°C.

　　The plastic‑coating process for welded steel pipes is currently an excellent anti‑corrosion technology. Hot‑dip plastic‑coated steel pipes and related product lines utilize various proprietary polymer formulations, applied via specialized equipment to uniformly coat the metal surface with electrostatic powder. After drying and melting, this forms a smooth, dense, and even plastic layer, resulting in a new type of composite seamless steel pipe with a plastic coating. This innovative material combines the superior physical properties of stainless steel with the exceptional solvent and corrosion resistance of fiber‑reinforced materials, significantly extending the service life of hot‑dip plastic‑coated steel pipes. It offers notable advantages such as corrosion resistance, wear resistance, fouling prevention, lubricity, and resistance to negative pressure.

　　Is the underground corrosion resistance of hot-dip coated steel pipes good?

　　1. Equipment Functions

　　Hot-dip coated plastic pipes can withstand a wide range of natural environmental conditions; the coating exhibits excellent ductility, and the seamless steel pipe boasts high compressive strength. Only when it possesses such robust resilience will it avoid causing injury to external personnel under impact or bending, delivering superior performance compared to other mine‑use anti‑corrosion plastic pipes.

　　2. Hot-dip coated steel pipes are corrosion-resistant, scale-free, and exhibit low fluid friction resistance.

　　Hot-dip coated steel pipes are corrosion-resistant and scale-free, making them ideally suited for conveying high-sulfur water and low-temperature ionized water containing calcium and magnesium in mining applications. They reduce maintenance costs, boast a service life far exceeding that of other pipe types, and deliver superior overall economic benefits compared to conventional piping.

　　3. Self-smoothing property

　　The inner surface of the hot-dip coated steel pipe remains wet and free of scale, ensuring low friction resistance; under reverse‑flow conditions, it can reliably operate up to 30.

　　That concludes the explanation provided by the editor. Hot-dip coated steel pipe The processing techniques and applicable regulations—thank you for watching, and we’ll see you in the next episode.