Next, we will explain to everyone. Hot-dip coated steel pipe It exhibits excellent corrosion resistance.

　　Hot-dip coated steel pipes exhibit excellent corrosion resistance.

　　Hot-dip plastic‑coated steel pipes exhibit excellent corrosion resistance. Both the inner and outer surfaces of electrical‑grade plastic‑coated steel pipes are treated with a coating process, significantly enhancing their corrosion‑resistant properties and enabling them to meet the demands of diverse operating environments. Furthermore, these pipes offer outstanding insulation performance; given their frequent use in power‑engineering applications, superior dielectric strength is critical to ensuring reliable power transmission. Additionally, plastic‑coated steel pipes do not shrink or deform, and their dimensions remain stable across seasonal variations, thereby extending their service life.

　　In the production of hot-dip plastic-coated steel pipes, a fluidized-bed dipping process is employed.

　　In the production of hot‑dip plastic‑coated steel pipes, a fluidized‑bed dipping process is employed to achieve one‑step forming, resulting in performance levels that conventional plastic‑coated steel pipes cannot attain. Hot‑dip plastic‑coated steel pipes represent an upgraded, next‑generation product, further underscoring the superior properties of this pipe material.

　　Some customers, driven by construction requirements, have been seeking hot-dip coated steel pipes and wish to bend them to meet their project specifications. This raises the question: can hot-dip coated steel pipes be bent? In theory, they can undergo cold bending; however, the cold-bending process can compromise the pipe’s internal structure, causing damage and deformation to the inner steel layer. As a result, the pipe may become unusable, with reduced performance and a shortened service life.

　　There are three common methods for connecting hot-dip galvanized and plastic-coated steel pipes.

　　There are three common methods for connecting hot-dip plastic‑coated steel pipes: threaded connections, flanged connections, and grooved connections. Threaded connections represent a traditional approach. The connection process involves several steps: tapping the threads, deburring, chamfering the inner surface of the plastic‑lined pipe, cutting to length, applying anti-corrosion coating to the threads, and finally making the connection. The length of the coupling varies depending on the application of the fitting, but one requirement remains consistent: the pipe end face must make full contact with the silicone rubber at the root, allowing it to deform and form a secondary seal. This method is suitable for piping systems operating at pressures up to 1.6 MPa. The advantages of threaded connections include low cost and ease of installation; however, they are subject to limitations in terms of pipe diameter.

　　Flanged connections offer relatively good sealing performance; however, due to their higher cost, they have been gradually replaced by other joining methods. They are commonly used in the chemical industry. In practical applications, the plastic liner must be integrally bonded to the flange face, and the fluid inside the pipe must be completely isolated from the steel pipe to ensure reliability.

　　That concludes the explanation provided by the editor. Hot-dip coated steel pipe It boasts excellent corrosion resistance. Thank you for watching, and see you next time.