The hot commissioning of the piercing mill with the world’s largest diameter was successfully achieved by THCO.

The hot commissioning of the piercing mill was successfully achieved by THCO. The billet with O.D.450mm was successfully pierced into hollow shell. All parameters meet the design requirements. THCO is a joint venture of TPCO and Jiangsu Shagang Group Huaigang Special Steel Co., LTD. The PQF508 mill is the first oversized O.D. seamless pipe production line among mandrel-rolling-mills in the world.