Plastic-coated steel pipe is a composite pipe made from steel pipe, coated with materials such as polyethylene and epoxy resin on the inner and outer surfaces via a hot-dip or electrostatic spraying process. It combines the strength of metal with the corrosion resistance of plastic.
1.Production Characteristics
Complex Process: It undergoes shot blasting, preheating, electrostatic spraying, and curing to ensure a secure bond between the coating and the steel pipe.
2.Material Synergy: The steel-plastic composite structure combines the mechanical strength of metal (yield strength ≥ 235 MPa) with the corrosion resistance of plastic, and is suitable for immersion in media with a pH of 2-12.
3. Environmentally Friendly Process: During the hot-dip process, the plastic powder cures at high temperatures to form a dense coating with an adhesion of ≥ 30 N/10 mm.
Main Applications
1. Gas Transportation: Suitable for applications such as city gas mains (accounting for 62%) and underground coal mine gas extraction. It is corrosion-resistant and can withstand pressures up to 6 MPa.
2.Liquid Transportation: Used in applications such as domestic water supply and chemical corrosion protection, and supports a variety of connection methods, including threaded and grooved connections. 3.Cable Sleeve: Features anti-interference capabilities, shielding 50Hz-1GHz electromagnetic interference, suitable for power engineering applications.
4.Industrial Corrosion Resistance: Reliable in acidic, alkaline, and high-salt environments (such as coastal gas pipelines), with a service life of 30 years or more.
