Baosteel Successfully Developed Deep-Sea Steel Pipe

Recently, Baosteel's longitudinal seam welded pipe production line successfully produced longitudinal welded steel pipes with diameters of 762×30.2 millimeters and 31.8 millimeters, becoming the first steel company in China to produce this type of deep-sea subsea line pipe, which made China’s deep-sea development projects stronger. Strong support.
Compared with terrestrial pipes, marine pipes are used in low temperature, high pressure, and strong corrosion environments. Therefore, stringent requirements are placed on the strength, toughness, compression resistance, and dimensional accuracy of line pipes. The longitudinally welded pipes with diameters of 762×30.2 mm and 31.8 mm are designed for deep-sea natural gas development projects. Due to their relatively high difficulty in manufacturing, they have a great test of equipment capabilities and raw material quality. Domestically, it had to rely on imports before, and it has never had a successful trial production experience.
In November last year, the CNOOC Nanhai Deepwater Natural Gas Development Project Preparatory Group issued a request letter to Baosteel for trial production of submarine pipelines for this project. Through comprehensive evaluation and analysis, Baosteel decided to trial-produce this size of welded pipe.

Baosteel set up a technical research team to start with steel making components, plate production technology and UOE weld pipe forming, welding, expanding process design, etc., to overcome the steel refinement and high quality requirements, slab quality control and other difficult issues, guarantee The quality of trial welded pipe products. After inspection by the authoritative assessment agency, it is believed that the submarine pipeline welded pipe produced by Baosteel in trial production has excellent performance, good welding toughness, good pipe type, small and uniform residual stress, and strong ability to resist collapse. It is in line with the requirements for submarine pipelines, and has mass production capacity. .

Our Factory has good sources Baosteel pipes , if you require any seamless steel pipe , welded pipe , alloy steel pipe , carbon steel pipe welcome to contact Bangdong Pipeline Technology Co.,Ltd . 

Thank you very much .