China's first stainless steel composite double deck pipe laying completed

Recently, 9-1N and 8-3E Chinese CNOOC Wenchang oilfield project capacity pipe laying is completed, This is China’s first laying of stainless steel composite double-deck pipe. It is the most difficult one to operate in China, and two new welding technologies have been applied for the first time.

The most important inner tube - double metal composite mechanical sea pipe is made by no.4 China’s space science and technology material company, the company also provides the whole site construction solutions.

The laying of the stainless steel composite double sea pipe whole length is 4.92 kilometers, the inner tube is 6 inch double metal composite pipe mechanical sea pipe with 3 mm stainless steel inner liner, the outer tube is a common carbon steel 10 inch tube, the middle of the two layers of sea pipes is filled 30mm insulating layer.