CISDI has re-engineered and supplied facilities for a three-roll cross tube rolling mill at Hengyang Steel’s plant 219 in China’s Hunan Province.

The line passed hot commissioning on schedule and to quality standards.

The arrangement of the mill’s upstream and downstream facilities was modified and the retained mandrel system was upgraded - technically difficult tasks which needed to be carried out within a tight schedule.

The tube mill is now able to perform flexible online switchovers between rolling modes with the aid of a full-floating and retained mandrel.

In addition, production capacity has been increased and the mill’s competence in producing thick and ultra-thick tubes has been enhanced.

The rebuild has expanded product specifications and ensured a more stable rolling.

CISDI’s outstanding project management skills shone throughout the rebuild process.

It took the team only four and a half months to fulfil equipment deliveries.

The mill was closed down for the rebuild, but CISDI’s onsite technical assistance team took just 13 days to hit hot commissioning targets.

Hot testing of the three-roll cross tube mill, which now features an upgraded mandrel system