On November 20, Inner Mongolia-based Chinese steelmaker Baotou Iron and Steel Co. (Baogang Group) announced that its seamless steel pipe mill has successfully produced P91 426 mm x 34 mm high-alloy high-pressure boiler tubes, constituting major progress for Baogang in manufacturing seamless steel pipe.

The tubes in question have strong resistance to high temperatures and high pressures, and are mainly used in superheater, reheater and steam pipelines.