Changbao goes state-of-the-art with CISDI’s tube rolling line

A state-of-the-art, special-purpose tube rolling line has been successfully hot commissioned at Changbao Precision Steel Tube Company in China.

It is the highest-standard modern seamless tube rolling line to be designed by a Chinese engineering company.

CISDI undertook the line’s engineering, EPCM, technological leadership and part of the package supplies.

The CISDI-supplied Piercer Mill features high rigidity, efficiency and precision and convenient operation and maintenance.

It applies multiple examples of CISDI’s expert tech – rack-driven plug bar, automatic plug change and automatic model setup. A centralised control room has been designed for this line and the process arrangement is simplified and smooth.

The line’s main products are high-quality petroleum oil casing pipe and line pipe, with outer diameter ranges of Φ51mm to Φ159mm and wall thickness ranges of 4.0mm to 20mm.

The annual projected production capacity is 300,000 tonnes.

CISDI’s mechanical, hydraulic and electric equipment supplies cover the line’s tubular stock area, piercer mill train and auxiliaries, retained mandrel circulation, cooling bed and pre-finishing mill areas.

Changbao is based in Changzhou City, in the Jiangsu Province. Supply and construction was hit by the pandemic but CISDI’s team adopted scientific and holistic approaches to ensure staff were protected from the virus as work resumed.

Online meetings between CISDI, Changbao and the partners involved ensured design, supply, commissioning and management targets were met.

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Changbao Steel Tube Co. was founded in 1958 and is China’s leading brand for the production of small and medium-calibre tube for the energy sector. It is also a dominant force in the global production of OCTG industry and small boiler tubes.

Changbao’s quality products have been welcomed by markets in Europe, America, the Middle East, Russia, Southeast Asia, Australia and Africa.

The company was listed on the Shenzhen Stock Exchange in 2010.

Its location in Changzhou City has an internal railway to connect with the Shanghai-Nanjing line.

A CISDI-supplied piercer mill for the latest line was hot-commissioned last December. Mid April saw the line go fully operational.

A piece of hollow bloom being processed (nitrogen blowing and borax blasting) before entering the downstream mandrel pipe mill

The CISDI-supplied piercer mill is pictured in place