Introduction of steel plates for EQ70 offshore platforms
EQ70 is the steel used in the American standard offshore platform, corresponding to the national standard NVE690, and the commonly used grades are EQ70-Z15, EQ70-Z25, EQ70-Z35ZZZ. EQ70 steel plate is the first marine engineering steel developed by Wugang, which is a new progress made by Wugang in the research and development of steel for offshore platforms.
| Chemical composition |
| Tabulation: Depu Steel Date: 2024-01-18 |
| C |
Si |
Mn |
P |
S |
Ni |
| ≤0.18 |
0.55 |
1.6 |
0.025 |
0.025 |
0.02 |
Note:
(1): In order to improve the properties of steel, the number of other trace alloying elements other than the above table can be added; It comes from the Internet and is for reference only.
(2): The allowable deviation of the chemical composition of the finished steel plate shall comply with the provisions of
GB/T222 EQ70 delivery status and quality standards for steel for offshore platforms: 1. EQ70 delivery status:
quenching + tempering.
2. The size, shape, weight, allowable deviation and surface quality shall comply with the provisions of ASME A6/A6M.
3. The quality and standards should be in line with the provisions of ABS classification society.
4. EQ70 sound detection standard conforms to ASTM A578/A578M, and the qualification level is C.
The steel used for EQ70 offshore platforms is subject to erosion and damage by natural forces such as waves, submarine earthquakes, and low temperatures.
The technical indicators of steel are extremely high, and the technical standards for steel in key parts such as racks and pile legs are more stringent.
In 2008, Wugang successfully developed the 140mm quenched and tempered high-strength plate EQ70 steel for offshore platforms.
