CISDI is to create a new special steel tube production line for the Changbao Precision Steel Tube Company in Jiangsu.

This production line will build China’s first 3-roll mandrel pipe mill with a dual-lateral roll change system. It will be capable of producing 300,000 tonnes of small-calibre and high-VAT alloy steel seamless tubes a year.

A main rolling line, one billet cutting line and three continuous pre-finishing lines are being configured.

The specification of seamless steel tube will have an outer diameter range of 51mm to 159mm (reserved to maximum 168.3mm), a wall thickness range of 4mm to 20mm and a length range of 6m to12m (reserved to maximum 13m).

The design and supply of the line’s electro-mechanical-hydraulic equipment, plant design and EPCM will be undertaken by CISDI.

CISDI and Changbao Tube are united in their pursuit of green targets and view the project as an opportunity to conduct joint research and development for China’s small-calibre tube industry.

CISDI has already successfully delivered four such package supplies in the last three years, all of which are performing to world-class technical indicators.

Among them is Fengbao’s Φ89mm tube mill, which is able to produce the world’s smallest calibre of 3-roll mandrel mill for rolling. Its core technology and equipment were all created in China, and are seen as great breakthroughs the technological monopoly previously held by steel companies outside of China.

Changbao Steel is a specialised seamless tube producer mainly oriented to the petroleum well market and the small-calibre alloy steel high-pressure boiler sector. It has an annual capacity of 750,000 tonnes.

Its main products are tube for oil-gas exploration, 200,000 tonnes of power station boiler tube a year (including 40,000 tonnes of HRSG ultra-long tube and 10,000 tonnes of U-shape tube) and 50,000 tonnes of machinery tube and other special-purpose tube a year. Some 500,000 tonnes of petroleum well tubes are also produced annually and the company exports widely across Europe, America, the Middle East, Southeast Asia and Africa.

The producer has built five tube rolling lines, eight threading lines and two U-shape tube processing lines.

Other tube mill production lines have been installed by CISDI at Dalipal (Φ159mm) and VALIN Hengyang (Φ89mm rebuild).

CISDI and Changbao Tube sign for a new special steel tube line