Submarine pipeline material selection must meet the design and offshore pipe laying and construction requirements. With the industrial development of submarine pipeline, the pipe reliability have become increasingly demanding, but the submarine pipeline pipe manufacturing methods are no special requirements, such as seamless steel pipe, a variety of shielded arc welding straight seam steel pipe, etc. can use. To meet the design and installation requirements under the premise, to choose the most economical pipe.

With the expansion of China’s offshore oil development, submarine pipeline construction after years of continuous exploration and improved in terms of the key processes of the construction group, welding, testing, and other more scientifically sound. Trend of submarine pipeline construction, high efficiency and high quality construction, process technology have become increasingly demanding, particularly on behalf of the level of submarine pipeline construction welding technology, improve submarine pipeline steel strength grade , the performance of the development pipeline welding technology and high production efficiency, high cost performance of the automatic welding process is a priority, in order to adapt to the pace of development of the submarine pipeline construction.