DN1800 internal epoxy and external 3PE expanded bell-and-spigot anti-corrosion steel pipe was put into use for the first time in Guizhou project

The "steel giant" of φ2032mm25.2mm16m is officially off the production line.Not only has it refreshed the global double record of spiral welded pipe diameter & length, it has also made Donghong the world's first king to master the "high steel grade + super-large diameter + super-long fixed length" three-in-one technology!China's pipeline manufacturing has entered the "giant era".

The successful mass production of DN1400mm diameter pipes marks that the company has become the first enterprise in China with the mass production capacity of pipes of this specification and has practical application cases.

Shandong Donghong Pipe Industry achieved a breakthrough in ultra-large diameter pipeline manufacturing on May 13, creating the world's first mass production technology for DN1200 steel wire wear-resistant pipes. This innovation fills the gap in domestic high-wear-resistant large-diameter pipe technology, breaks through the limits of traditional processes, promotes my country's pipeline industry to move towards high-end equipment manufacturing, and demonstrates the company's hard-core strength in independent innovation.

On April 24, 2025, Bruno Lammers, Chairman of the German SAERTEX Group, led the executive team, including Kai Diecks, Global General Manager, Michael Ellenrieder, General Manager of Asia Pacific Middle East, Ji Naijin, Deputy General Manager of Pipeline Repair Technology (Pinghu) Co., Ltd., and Li Juanjuan, Sales Manager, to visit Donghong Pipe Industry. With the support and help of the government, the two parties reached a cooperation agreement and signed a strategic cooperation agreement. They will work together in five dimensions, including the integration of pipeline rest technology, to jointly grasp the new trends in the industry, open up the large market of China's urban renewal industry, and achieve mutual benefit and win-win results.