Tuesday, November 11, 2014

LSAW pipelines construction of China's "twelve five"

Currently, the world oil and gas transporting line has reached 260 million meters, which natural gas pipeline accounts for about 60 percent. Since the 1990s, the world's annual new built gas pipeline 1.2 million meters to 1.6 million meters, new built base oil pipeline of 0.2 million meters to 0.3 million meters. Before the "Twelve Five", China has built a oil and gas main pipeline of  7.5 million meters, which accounts for about 50 percent of natural gas trunk; China is expected to newly build oil and gas main lines of about 5 million meters of  to 6 million meters during the "twelve five" period, among of which natural gas pipeline accounts for about 50 % and the above.

Foreign gas transmission (including city gas pipeline network branch, main line and urban ring main line) mainly uses the LSAW steel pipe, less use of SSAW steel pipe. Our natural gas project in 1 class areas (desert, mountains and other sparsely populated areas) is with spiral submerged arc welded steel pipe, in two, three, four areas (industrial zones, urban and densely populated areas, etc.) is with LSAW steel pipe or ERW steel pipe (HFW). In the West-East Gas Pipeline Project, due to the high requirements of pipeline transport pressure (12MPa), high grade steel (X80), large diameter (ф1219mm) and wall thickness (≥18mm), LSAW steel pipe increasingly showing its superiority. Upon the completion of the construction of the West-East Pipeline Project in China, foreign single-tube gas transmission lines of transmission capacity has reached 46 billion cubic meters - 50 billion cubic meters / year, while China can only reach 30 billion cubic meters / year. However, if the pipeline across the board is replaced by the ф1420mm, X80 grade LSAW steel pipe, then the country's single-tube gas transmission capacity will reach 50 billion cubic meters / year advanced level.

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