Jiangsu Qiyuan Group ,part of Yuan Group, is a modern diversified multinational company integrating R&D, production and marketing, ranks among the top in the industry in terms of comprehensive competitiveness. Jiangsu Longyuan Metal Technology Co., Ltd., a subsidiary of its group, has 3 high-precision lamination rolling production lines, 2 welding high-speed pipe-making units and a full set of production equipment, professional Production of various types of steel-aluminum laminated pipe, steel-aluminum laminated board, steel-copper-clad tube,high-frequency welded steel pipe and other products.