Binhai LNG project is located in the northeast of Subei faulted basin in the Yangtze fault block area. The strata are well developed and a set of shallow marine, coastal and continental materials are deposited. The Quaternary sedimentary thickness is about 150m.
The ground elevation is generally between 0.6m and 9.8m. According to the ground elevation (zero point of the waste Yellow River), the whole county can be divided into three types: high elevation land, sub highland and low-lying polder area. There is large population, wide water network, complex roads crossings and discontinuous pipeline laying surface in the area. Sichuan Oil Engineering & Construction Co., Ltd. (CNPC group) utilizes 5 spreads of Xionggu A-806/36 internal welding machines and A-610 dual torch pipeline automatic welding machines in this project.
Except for the fourth spread who has no welding work, the number of welded joints per day by the first spread is 56, 55 by the fifth spread is 55, 24 by the second and third spreads respectively, and the total number of welded joints per day amounts to 159. This is new record set by Sichuan Oil Engineering & Construction Co., Ltd. for in the terrain of wide water network.
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