Extra large diameter seamless steel pipe plant opens in Hunan

The world's first and largest diameter seamless steel pipe continuous rolling production line went into operation on Monday in Hengyang, Hunan province, marking a historic leap in China's independent manufacturing capacity for extra large diameter premium seamless steel pipes.

With a total investment of 3.07 billion yuan ($453.75 million), the production line is designed to produce 800,000 metric tons of seamless steel pipes annually.

Its products cover outer diameters ranging from 323.8 millimeters to 630 mm, with wall thickness between 7.2 mm and 65 mm.