[History of Haichuan Pipeline] Crude oil pipeline with the highest design pressure

2014-05-21 · China.com Official Account The Yong-Shanghai-Nanjing crude oil pipeline in Zhejiang was drilled and stolen by oil thieves on the 20th, causing a crude oil leakage of 2 cubic meters and a contaminated area of ​​1,500 square meters. At present, related work such as repair welding of the stolen oil hole has been completed, and the contamination is being removed. At present, Sinopec Pipeline Company has reported the case to the public security organs, and the police have intervened in the investigation.

The world-leading Yong-Shanghai-Nanjing imported crude oil pipeline designed and constructed by Sinopec has been fully connected Article source: China Petrochemical Corporation release time: 2004-03-30 The Yong-Shanghai-Nanjing imported crude oil pipeline, designed and constructed by Sinopec and world-leading, was fully connected. On March 20, with the completion of the last welding joint of the 711 mm diameter Hangzhou Bay submarine pipeline, the Yong-Shanghai-Nanjing imported crude oil pipeline, a key project of the group company with important strategic significance for my country's petrochemical industry, was fully connected. 　　In order to adapt to the increasing demand for petroleum resources with the development of my country's economy, further enhance the market competitiveness of enterprises, and improve the economic benefits of the entire industry, Sinopec Group Corporation and Sinopec Corporation decided to invest in the construction of an imported crude oil pipeline project connecting refining companies in Ningbo, Shanghai and Nanjing, referred to as the "Ningbo-Shanghai-Ningbo Imported Crude Oil Pipeline Project", to meet the needs of oil consumption and national economic development in southern my country.

In September 2002, the then* * The Development Planning Commission officially issued a document approving the construction of the Yong-Shanghai-Ningbo imported crude oil pipeline project. At the same time, as one of the disclosure projects for Sinopec's A-share listing, this project has also attracted widespread attention from domestic and foreign industries and shareholders. 　　The Ningbo-Shanghai-Nanjing Pipeline is the first large-diameter, long-distance crude oil pipeline planned, designed and organized by Sinopec on its own. Its construction is of extremely important strategic significance to Sinopec. After it is completed, it will adopt a normal-temperature sealed oil transportation method and realize automatic control of the whole line through the advanced S CADA system. Its designed annual transportation capacity will reach 20 million tons. It is a long-distance crude oil pipeline with world advanced and domestic leading levels.

According to the unified deployment of the group company, the Pipeline Storage and Transportation Company is specifically responsible for the construction of the Ningbo-Shanghai-Nanjing Pipeline. On November 25, 2003, the construction task of the Yong-Shanghai-Nanjing onshore pipeline with a total length of 591.5 kilometers, containing pipes of various diameters and laying communication optical cables in the same ditch was completed. 　　During the construction of the Ningbo-Shanghai-Nanjing onshore pipeline, pipeline builders from China and South Korea worked together to carry out the construction of the Ningbo-Shanghai-Nanjing Pipeline Hangzhou Bay submarine pipeline. They overcame difficulties such as strong tides and frequent monsoons in Hangzhou Bay, and finally completed the construction of the 53.5-kilometer-long, 711-mm-diameter Hangzhou Bay submarine pipeline on March 20. 　　So far, the 645-kilometer Yong-Shanghai-Nanjing imported crude oil pipeline, which runs through mountains, rivers and seas, and across the Yangtze River Delta, has been fully connected.

The construction of the Ningbo-Shanghai-Nanjing Pipeline is a major achievement in the history of pipeline construction in my country. The majority of pipeline builders have created several new records in the history of pipeline construction in China and the world during the construction of the Ningbo-Shanghai-Nanjing Pipeline.: For the first time in my country, a pipeline crosses the Yangtze River, fulfilling the dream of pipeline workers of all generations in my country to "lead the oil dragon to the south of the Yangtze River" ； For the first time in my country, self-buried submarine pipeline technology was used to build the Hangzhou Bay submarine pipeline. ； In the Hangzhou Bay Pipeline Project, the world's longest records for offshore towed pipe and seabed directional drill crossing construction were successively set.

After the Ningbo-Shanghai-Nanjing Pipeline was fully connected, according to the deployment of the joint-stock company, the pipeline company conducted a trial operation of the 54-kilometer pipeline between Ningbo Daxie Island and Lanshan Oil Transmission Station. At 9:12 a.m. on March 20, the Daxie Island Oil Depot began oiling. After running underground for 12 hours and 15 minutes, at 21:28 that day, the imported crude oil transported through the Yong-Shanghai-Nanjing Pipeline successfully arrived at the Lanshan Oil Transmission Station. The trial operation of the Daxiedao to Lanshan section of the Yong-Shanghai-Nanjing Pipeline was a success.

Ningbo, China Net News The Zhoushan Cezi Island crude oil transfer terminal, a supporting project for the Ningbo to Shanghai and Nanjing imported crude oil pipelines, has recently passed the acceptance inspection. So far, the Yong-Shanghai-Nanjing crude oil pipeline network has been fully put into operation, which means that the 680-kilometer-long Yong-Shanghai-Nanjing crude oil pipeline network can achieve an annual crude oil transportation capacity of 40 million tons. 　　According to reports, the Cezi Island crude oil transfer terminal connects the Aoshan-Cezi-Zhenhai pipeline with a total length of 87 kilometers, of which about 42 kilometers cross the seabed. 　　Sinopec's Ningbo-Shanghai-Nanjing imported crude oil pipeline starts from Daxie Island in Ningbo, passes through Zhejiang, Jiangsu and Shanghai, and finally reaches Nanjing. It is currently the longest and largest diameter crude oil pipeline in China. There are three pipelines in the Hangzhou Bay submarine oil pipeline, and the submarine part of each pipeline is 53.5 kilometers long. 　　The crude oil pipeline with a diameter of 711 mm runs from the Daxie 250,000-ton crude oil terminal through the Zhenhai Lanshan transfer oil depot and the Hangzhou Bay submarine oil pipeline. It is divided into two routes to reach Shanghai Petrochemical and Gaoqiao Petrochemical in Shanghai Jinshanwei and Nanjing Jinling Petrochemical and Yangzi Petrochemical. The 762 mm diameter crude oil pipeline starts from Cezi Island in Zhoushan and leads to petrochemical companies in Shanghai and Nanjing via Zhenhai Lanshan transfer oil depot and submarine oil pipeline. author: Chen Xiaoming

Yangzi Petrochemical's "Yong-Shanghai-Nanjing" crude oil long-distance pipeline system passed the acceptance inspection Contributor 2019-01-10 On January 8, the four cylinder valve delayed closing technology of Yangzi Petrochemical's "Yong-Shanghai-Nanjing" crude oil long-distance pipeline system passed the acceptance and confirmation of the expert group, and the process change procedures were completed, indicating that the research and development of this new technology was successful and can be used in actual work. This is because Yangzi Petrochemical relied on its own scientific research strength, production units and electrical instrument departments to work together and spend very little investment to solve the major problem of pressure fluctuations in long-distance crude oil pipelines.

Yangzi's annual crude oil refining capacity is 12.5 million tons, of which 80% of the crude oil entering the plant relies on two long-distance pipelines. The pipeline company will transport the crude oil that Yangzi plans to purchase from Ningbo and Yangzhou through the "Yong-Shanghai-Ningbo" and "Yi-Yang" pipelines to the storage tanks of the storage and transportation plant. During the crude oil pipeline transportation operation, the transportation operation of the long-distance pipeline is continuous, and the flow rate can reach up to 1,500 tons per hour. When the receiving storage tank is close to the upper limit, tank cutting operation is required. The opening and closing time of the control valve are fixed values ​​set by the manufacturer, which is 8 to 10 seconds. For large-diameter, high-flow operations that are hundreds of kilometers long, if the valve switching operation is performed within a short period of time, especially when switching from a large diameter to a smaller diameter, the pressure in the pipeline will rise instantly, resulting in large pressure fluctuations, causing "liquid shock" in the long-distance pipeline, affecting and damaging the long-distance pipeline and its accessories. If the pressure exceeds 0.8 MPa, the safety valve of the pipeline system will trip, and at the same time, the transmission valve will be interlocked and closed, causing the transportation to stop, affecting the pipeline transportation operation and the production of the company's upstream devices.