[History of Haichuan Pipeline] my country’s first domestic large-diameter natural gas transmission hose

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my country's first domestic large-diameter natural gas transmission hose was put into operation 2015-07-15 As of July 8, my country's first domestically produced 12-inch large-diameter hose has transported more than 50 million cubic meters of natural gas. The successful operation of this domestically produced hose has solved the natural gas pipeline transportation problem of Dongfang 1-1 Phase I, my country's first high-temperature and high-pressure gas field, and promoted the efficient development of the gas field. The hose is 9.7 kilometers long and transports high-temperature and high-pressure natural gas at 80 degrees Celsius and nearly 10 MPa in Dongfang 1-1 Phase I to nearby gas fields for processing. The original design of Dongfang 1-1 Phase I ODP uses 12-inch large-diameter metal composite pipes as gas transmission pipelines. However, this pipeline needs to be laid by a large pipe-laying ship, which is slow and costly. Taking various factors into account, the Zhanjiang Branch of CNOOC Co., Ltd. decided to use 12-inch domestic hoses instead of 12-inch composite pipes, saving nearly 100 million yuan in project investment. The successful domestic production of this kind of hose has effectively promoted the upgrading of my country's pipe manufacturing technology.