Steel plate for offshore platform

Offshore platform that provides production and living facilities for drilling, oil recovery, transportation, observation, navigation, and construction activities at sea.

According to its structural characteristics and working conditions, it can be divided into three categories: fixed, movable and semi-fixed. The lower part of the fixed platform is directly supported by the pile, the enlarged foot or other structures and fixed to the sea floor, and is divided into pile foundation type and gravity type according to the support condition. The movable platform floats in the water or is supported on the seabed and can be displaced from one well to another. According to the support situation, it can be divided into two types: bottom type and floating type. In recent years, a novel semi-fixed offshore platform has been studied, which can be fixed in deep water and has mobility, and the tension leg platform belongs to this category.

Foreign marine platform material number
S355G2+N,S355G3+N,S355G5+M,S355G6+M,S355G7+M,S355G7+N,S355G8+N,S355G8+M,S355G9+N,S355G9+M,S355G10+N,S355G10+M,S420G1+M,S420G1+QT,S420G2+M,S420G2+QT,S460G1+ M,S460G1+QT,S460G2+M,S460G2+QT

For the research and development of steel plates for offshore platforms, S460G2+QT/EQ43-EQ51/S355G10+N/A517GrQ/NVE690 and other materials are widely used. Confirmed and optimized the production process of EQ43-EQ51 and WDB620E, and carried out trial production of 177.8mm, 185mm, 215mm thick A517GrQ steel plate, obtained the certification of ABS classification society, completed the trial production of S355G10+N, different thickness specifications of 25-110 The test results of the steel plate are good, and the performance indexes can fully meet the standard requirements. The marine engineering marine steel plate NVE690 was successfully trial-produced and put into mass production for delivery to customers. Expand the share of steel used in marine engineering to replace imports. Developed 150mm grade A514GrQ high-strength steel, which is the first in China at the thickness level of quenching type. It has been applied to the manufacture of offshore jack-up platforms and has been certified by the American ABS and other classification societies.