The anti-corrosion coating for steel-lined pipes uses domestically produced modified epoxy powder coating, which has strong adhesion, a smooth surface, excellent corrosion resistance, and prevents scaling. The pipe connections are made with special connectors, which are crafted from special heat-resistant insulating materials and processed through a special technique. During on-site welding, the heat is unable to directly transfer to the coating on the inner surface of the joint, ensuring that the welding joint maintains the integrity of the anti-corrosion layer, achieving overall corrosion protection for the entire pipeline.

Connectors are equipped with heat and oil-resistant rubber seals and mechanical sight seals. Field connections are made with a special sealing compound, ensuring no leakage under 25MP pipeline pressure. The pipes are complete and can be used in unordered directions and environments. The development of the inner plastic pipeline has been launched into the market, filling a domestic gap and obtaining a national technological patent. Widely used in oilfield tertiary oil recovery, polymer injection pipelines, and oil-containing sewage pipelines. It completely solves the repair issue of anti-corrosion steel pipe weld joints below DN300, replacing stainless steel, glass fiber reinforced plastic, and other anti-corrosion steel pipes. It offers reasonable pricing, ease of construction, and extends the service life of pipelines.