The CRA-lined compound steel pipes produced by Hilong Group are a kind of anti-corrosion alloy pipe with stainless steel lining. Such production technology and process development is a total innovation, with proprietary intellectual property rights. It has established a leading position in the high corrosion resistant gathering pipeline and line pipe anti-corrosion field.•Mature and Reliable Technique and Process since 2005•Base Material: carbon steel pipe or alloy pipe•Inner Material: stainless steel pipe or CRA pipe•Outstanding capacity of anti-corrosion , and excellent mechanical property• 3rd production line starting from May 2014, with production capacity range fromΦ60.3 mm-Φ914mm