Aluminum-magnesium alloy can play an important role in offshore oil and gas production equipment.

Condensate oil transportation is being carried out in the "Shenhai No.1" gas field.

The daily natural gas output of "Shenhai No.1", the first 1500m ultra-deep water large gas field independently developed and built in China, reaches 10 million m3, reaching the designed peak output ahead of schedule, and has the ability to produce 3 billion m3 peak. it indicates that China's offshore oil industry has comprehensively mastered the complete technical system of production, operation and maintenance of deepwater and ultra-deepwater oil and gas fields.

"Shenhai No.1" gas field is an offshore ultra-deep water gas field with the deepest average water depth and the greatest difficulty in exploration and development. Since it was put into production in June last year, the gas field has completed equipment debugging and process optimization, and has entered its best state since it was put into production. After landing at the Hong Kong terminal, Gaolan (Guangdong Province) terminal and Nanshan (Fujian Province) terminal respectively, the gas field is connected to the national natural gas supply system.

Offshore oil and gas exploration, exploitation and transportation equipment is a huge and complex system, which is composed of many mechanical, electrical, control components and system components, which can be classified into shore-based, above-water and underwater, but they all have to withstand the severe erosion of marine atmosphere. Therefore, their structures must be made of materials that can work for a long time in such a harsh environment. Among the existing industrial structural materials, aluminum alloy is the best material for manufacturing structure. no matter what aluminum alloy material, whether cast or processed, is the most perfect combination of mechanical properties, corrosion resistance, price and so on. of course, there are also some steels that perform very well in this respect, but the density of steel is high, and the quality of steel workpieces is much larger than that of aluminum alloy under the same performance conditions.

Although all aluminum alloys are rare materials for the manufacture of offshore oil and gas fields and shore-based facilities, it is best to use 5-series deformed aluminum alloy and ZL3XX series cast aluminum alloy, which are the best aluminum alloys for offshore structures. 5083 type alloy and 5056 type alloy can be selected for deformed aluminum alloy. The composition (mass%) of 5083 alloy is 0.40 Si,0.40 Fe,0.10 Cu,0.40-1.0Mn,4.0-4.9Mg,0.0-0.25Cr,0.25 Zn,0.15 Ti, and other impurities are 0.05,0.15 in total, and the remaining amount is Al. 5083 alloy was invented by Alcoa, registered in (AA) in 1954, and now has eight members: 5083, 5183, 5183A, 5283, 5283A, 5283B, 5383, 5483.

5056 alloy, also developed by Alcoa, was formed in 1936 and registered in the American Aluminum Association in 1954. There are 10 members of this family of alloys: 5056, 5356, 5356A, 5456, 5456A, 5456B, 5556, 5556A, 5556B, 5556C. 5083 and 5056 alloys have good processability, formability and weldability, and can be processed into a variety of semi-finished products.