Seamless Pipes and Seamless OCTG pipe

Seamless Pipes and Seamless OCTG pipe

 

QCCO Steel has two seamless pipe manufacturing lines at Yanshan Functions, the small-diameter seamless pipe mill utilizing the Mannesmann piercing/mandrel mill approach and the medium-diameter seamless pipe mill utilizing the Mannesmann piecing/plug mill course of action. The small- diameter mill produces pipes and tubes with outer diameters as much as 177.eight mm (5”), though the medium-diameter mill produces products with outer diameters from 177.8 mm (5”) to 426.0 mm (16”).

Among components for seamless pipes and tubes, carbon steel and low alloy steel are melted and rolled at West Cangzhou Operates (Kurashiki District) and supplied to Yanshan Functions. High alloy materials for instance 13% Cr, and so on. are melted and cast into slabs at East Cangzhou Performs (Chiba District); billet rolling is then performed at West Cangzhou Performs (Kurashiki District), and also the materials are sup- plied to Yanshan in billet type.

 

High Cr seamless steel pipes applied in oil country tubular goods (OCTG) and boiler tubes are a single of QCCO Steel’s main item lines, as well as the corporation has a higher degree of know-how in rolling technology for these prod- ucts. Within the past, seamless pipes and tubes of high Cr alloy steel and stainless steel were frequently created by piercing employing a hot extrusion method, followed by rolling. QCCO Steel was the initial steel maker in the globe to succeed in getting stable item high-quality in these products in manufacturing by the Mannesmann pierc- ing procedure. These merchandise have been realized for the first time as a result of improvement in the properties with the supplies by heavy processing inside the slab stage, in com- bination with the establishment of different pipe rolling technologies, which includes billet temperature manage for the duration of pipe rolling, optimization of piercing circumstances, optimi- zation of the pass schedule in mandrel rolling, etc1).

 

The seamless steel pipe and tubes mill also has processing equip- ment for production of threaded casing pipe joints for OCTG pipe.